Centralized all the code used to decode instructions.

git-svn-id: svn://svn.gna.org/svn/chrysalide/trunk@32 abbe820e-26c8-41b2-8c08-b7b2b41f8b0a

27 files changed, 995 insertions, 1009 deletions

diff --git a/ChangeLog b/ChangeLog
index 634025b..b457000 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,34 @@
+2008-09-20  Cyrille Bagard <nocbos@gmail.com>
+
+	* src/arch/operand.h:
+	* src/arch/x86/instruction.h:
+	* src/arch/x86/op_adc.c:
+	* src/arch/x86/op_add.c:
+	* src/arch/x86/op_and.c:
+	* src/arch/x86/op_call.c:
+	* src/arch/x86/op_cmp.c:
+	* src/arch/x86/opcodes.h:
+	* src/arch/x86/op_dec.c:
+	* src/arch/x86/operand.c:
+	* src/arch/x86/operand.h:
+	* src/arch/x86/op_inc.c:
+	* src/arch/x86/op_int.c:
+	* src/arch/x86/op_jump.c:
+	* src/arch/x86/op_lea.c:
+	* src/arch/x86/op_mov.c:
+	* src/arch/x86/op_or.c:
+	* src/arch/x86/op_pop.c:
+	* src/arch/x86/op_push.c:
+	* src/arch/x86/op_sar.c:
+	* src/arch/x86/op_sbb.c:
+	* src/arch/x86/op_sub.c:
+	* src/arch/x86/op_test.c:
+	* src/arch/x86/op_xor.c:
+	* src/arch/x86/processor.c:
+	* src/arch/x86/processor.h:
+	Centralize all the code used to decode instructions. Rename enumerations
+	and functions according to the handled operands.
+
 2008-09-16  Cyrille Bagard <nocbos@gmail.com>
 
 	* src/arch/x86/op_adc.c:
diff --git a/src/arch/operand.h b/src/arch/operand.h
index e913059..a05f819 100644
--- a/src/arch/operand.h
+++ b/src/arch/operand.h
@@ -34,6 +34,8 @@
 /* Taille des données intégrées */
 typedef enum _AsmOperandSize
 {
+    AOS_UNDEFINED,                          /* Taille non définie          */
+
     AOS_8_BITS,                             /* Opérande sur 8 bits         */
     AOS_16_BITS,                            /* Opérande sur 16 bits        */
     AOS_32_BITS,                            /* Opérande sur 32 bits        */
diff --git a/src/arch/x86/instruction.h b/src/arch/x86/instruction.h
index 68a5fff..8ef603f 100644
--- a/src/arch/x86/instruction.h
+++ b/src/arch/x86/instruction.h
@@ -40,7 +40,12 @@ typedef enum _X86Opcodes
 {
     X86_OP_SUB_R1632_RM1632,                /* sub ([0x66] 0x29)           */
 
-    X86_OP_XOR_REG1632,                     /* xor ([0x66] 0x31)           */
+    X86_OP_XOR_RM8_R8,                      /* xor (0x30)                  */
+    X86_OP_XOR_RM1632_R1632,                /* xor ([0x66] 0x31)           */
+    X86_OP_XOR_R8_RM8,                      /* xor (0x32)                  */
+    X86_OP_XOR_R1632_RM1632,                /* xor ([0x66] 0x33)           */
+    X86_OP_XOR_AL_IMM8,                     /* xor (0x34)                  */
+    X86_OP_XOR_E_AX_IMM1632,                /* xor ([0x66] 0x35)           */
 
     X86_OP_CMP_RM1632_R1632,                /* cmp ([0x66] 0x39)           */
 
@@ -85,25 +90,27 @@ typedef enum _X86Opcodes
     X86_OP_JE_8,                            /* je (0x74)                   */
     X86_OP_JNE_8,                           /* jne (0x75)                  */
 
+    X86_OP_XOR_RM8_IMM8,                    /* xor (0x81 6)                */
     X86_OP_CMP_RM8_IMM8,                    /* cmp (0x80 7)                */
 
-    X86_OP_ADD_IMM1632_REG1632,             /* add ([0x66] 0x81 0)         */
+    X86_OP_ADD_RM1632_IMM1632,             /* add ([0x66] 0x81 0)         */
+    X86_OP_XOR_RM1632_IMM1632,              /* xor ([0x66] 0x81 6)         */
 
-    X86_OP_ADD8_REG1632,                    /* add ([0x66] 0x83 0)         */
-    X86_OP_OR8_REG1632,                     /* or ([0x66] 0x83 1)          */
-    X86_OP_ADC8_REG1632,                    /* adc ([0x66] 0x83 2)         */
-    X86_OP_SBB8_REG1632,                    /* sbb ([0x66] 0x83 3)         */
-    X86_OP_AND8_REG1632,                    /* and ([0x66] 0x83 4)         */
-    X86_OP_SUB8_REG1632,                    /* sub ([0x66] 0x83 5)         */
-    X86_OP_XOR8_REG1632,                    /* xor ([0x66] 0x83 6)         */
+    X86_OP_ADD_RM1632_IMM8,                 /* add ([0x66] 0x83 0)         */
+    X86_OP_OR_RM1632_IMM8,                  /* or ([0x66] 0x83 1)          */
+    X86_OP_ADC_RM1632_IMM8,                 /* adc ([0x66] 0x83 2)         */
+    X86_OP_SBB_RM1632_IMM8,                 /* sbb ([0x66] 0x83 3)         */
+    X86_OP_AND_RM1632_IMM8,                 /* and ([0x66] 0x83 4)         */
+    X86_OP_SUB_RM1632_IMM8,                 /* sub ([0x66] 0x83 5)         */
+    X86_OP_XOR_RM1632_IMM8,                 /* xor ([0x66] 0x83 6)         */
     X86_OP_CMP_RM1632_IMM8,                 /* cmp ([0x66] 0x08 7)         */
 
-    X86_OP_TEST_RM8,                        /* test ([0x66] 0x84)          */
-    X86_OP_TEST_RM1632,                     /* test ([0x66] 0x85)          */
+    X86_OP_TEST_RM8_R8,                     /* test ([0x66] 0x84)          */
+    X86_OP_TEST_RM1632_R1632,               /* test ([0x66] 0x85)          */
 
-    X86_OP_MOV_REG1632,                     /* mov ([0x66] 0x89)           */
+    X86_OP_MOV_RM1632_R1632,                /* mov ([0x66] 0x89)           */
 
-    X86_OP_MOV_FROM_CONTENT1632,            /* mov ([0x66] 0x8b)           */
+    X86_OP_MOV_R1632_RM1632,                /* mov ([0x66] 0x8b)           */
 
     X86_OP_LEA,                             /* lea ([0x66] 0x8d)           */   /* 66 ? */
 
@@ -131,20 +138,20 @@ typedef enum _X86Opcodes
     X86_OP_RET,                             /* ret (0xc3)                  */
 
     X86_OP_MOV_IMM8_TO_RM8,                 /* mov (0xc6)                  */
-    X86_OP_MOV_TO_CONTENT1632,              /* mov ([0x66] 0xc7)           */
+    X86_OP_MOV_IMM1632_TO_RM1632,           /* mov ([0x66] 0xc7)           */
 
     X86_OP_LEAVE,                           /* leave (0xc9)                */
 
     X86_OP_INT,                             /* int (0xcd)                  */
 
-    X86_OP_CALL,                            /* call (0xe8)                 */
+    X86_OP_CALL_REL1632,                    /* call ([0x66] 0xe8)          */
 
     X86_OP_JMP_8,                           /* jmp (0xeb)                  */
 
     X86_OP_HLT,                             /* hlt (0xf4)                  */
 
     X86_OP_CALL_RM1632,                     /* call ([0x66] 0xff 2)        */
-    X86_OP_PUSH_CONTENT,                    /* push ([0x66] 0xff 6)        */   /* 66 ? */
+    X86_OP_PUSH_RM1632,                     /* push ([0x66] 0xff 6)        */
 
     X86_OP_COUNT
 
diff --git a/src/arch/x86/op_adc.c b/src/arch/x86/op_adc.c
index 9ff0f63..8927607 100644
--- a/src/arch/x86/op_adc.c
+++ b/src/arch/x86/op_adc.c
@@ -46,53 +46,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_adc8_with_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_adc_imm8_to_rm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur empilée              */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO ! */
-    if ((data[*pos] & 0xc0) != 0xc0)
-        return NULL;
-
-    reg = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    (*pos)++;
-
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
     {
-        free(reg);
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_add.c b/src/arch/x86/op_add.c
index 09abfff..52b998f 100644
--- a/src/arch/x86/op_add.c
+++ b/src/arch/x86/op_add.c
@@ -46,53 +46,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_add8_with_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_add_imm8_to_rm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur empilée              */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO ! */
-    if ((data[*pos] & 0xc0) != 0xc0)
-        return NULL;
-
-    reg = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    (*pos)++;
-
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
-    {
-        free(reg);
-        free(value);
-        free(result);
-        return NULL;
-    }
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
@@ -118,43 +88,19 @@ asm_x86_instr *x86_read_instr_add_imm1632_to_rm1632(const uint8_t *data, off_t *
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur empilée              */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_rm1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
-    if (reg == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), oprsize, data, pos, len))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM1632, oprsize))
     {
-        free(reg);
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_and.c b/src/arch/x86/op_and.c
index d4ad22a..3e3ba26 100644
--- a/src/arch/x86/op_and.c
+++ b/src/arch/x86/op_and.c
@@ -46,53 +46,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_and8_with_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_and_rm1632_with_imm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur empilée              */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO ! */
-    if ((data[*pos] & 0xc0) != 0xc0)
-        return NULL;
-
-    reg = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    (*pos)++;
-
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
     {
-        free(reg);
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_call.c b/src/arch/x86/op_call.c
index 28964b2..980a5e7 100644
--- a/src/arch/x86/op_call.c
+++ b/src/arch/x86/op_call.c
@@ -46,38 +46,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_call(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_call_rel1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *value;                 /* Valeur empilée              */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-        offset++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    value = create_new_x86_operand();
-    if (!fill_relimm_operand(ASM_OPERAND(value), oprsize, data, pos, len, ++offset))
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_REL1632, oprsize, offset))
     {
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(value);
-
     return result;
 
 }
@@ -103,33 +88,19 @@ asm_x86_instr *x86_read_instr_call_rm1632(const uint8_t *data, off_t *pos, off_t
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Elément à appeler           */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-        offset++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_rm1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
-    if (reg == NULL)
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_RM1632, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_cmp.c b/src/arch/x86/op_cmp.c
index 9e5bcc5..5afd794 100644
--- a/src/arch/x86/op_cmp.c
+++ b/src/arch/x86/op_cmp.c
@@ -49,35 +49,17 @@
 asm_x86_instr *x86_read_instr_cmp_rm8_with_imm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur portée               */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_rm8_operand(data, pos, len, true);
-    if (reg == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM8, X86_OTP_IMM8))
     {
         free(result);
         return NULL;
     }
 
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
-    {
-        free(reg);
-        free(value);
-        free(result);
-        return NULL;
-    }
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
@@ -103,43 +85,19 @@ asm_x86_instr *x86_read_instr_cmp_rm1632_with_imm8(const uint8_t *data, off_t *p
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur portée               */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_rm1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
-    if (reg == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
     {
-        free(reg);
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
@@ -165,46 +123,19 @@ asm_x86_instr *x86_read_instr_cmp_rm1632_with_r1632(const uint8_t *data, off_t *
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    off_t reg1_pos;                         /* POsition après lecture #1   */
-    asm_x86_operand *reg1;                  /* Registre de destination     */
-    asm_x86_operand *reg2;                  /* Registre de source          */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg1_pos = *pos;
-    reg1 = x86_create_rm1632_operand(data, &reg1_pos, len, oprsize == AOS_32_BITS, true);
-    if (reg1 == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_R1632, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    reg2 = x86_create_r1632_operand(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg2 == NULL)
-    {
-        free(result);
-        free(reg1);
-        return NULL;
-    }
-
-    *pos = reg1_pos;
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg1);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg2);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_dec.c b/src/arch/x86/op_dec.c
index 2849524..dd3562e 100644
--- a/src/arch/x86/op_dec.c
+++ b/src/arch/x86/op_dec.c
@@ -38,7 +38,7 @@
 *                offset = adresse virtuelle de l'instruction.                 *
 *                proc   = architecture ciblée par le désassemblage.           *
 *                                                                             *
-*  Description : Décode une instruction de type 'inc' (16 ou 32 bits).        *
+*  Description : Décode une instruction de type 'dec' (16 ou 32 bits).        *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -46,36 +46,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_dec_1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_dec_r1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[*pos];
 
-    reg = x86_create_reg1632_operand(data[(*pos)++], oprsize == AOS_32_BITS, 0x48);
-    if (reg == NULL)
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_OP_R1632, oprsize, 0x48))
     {
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_inc.c b/src/arch/x86/op_inc.c
index 8b6326b..912d432 100644
--- a/src/arch/x86/op_inc.c
+++ b/src/arch/x86/op_inc.c
@@ -46,36 +46,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_inc_1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_inc_r1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[*pos];
 
-    reg = x86_create_reg1632_operand(data[(*pos)++], oprsize == AOS_32_BITS, 0x40);
-    if (reg == NULL)
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_OP_R1632, oprsize, 0x40))
     {
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_int.c b/src/arch/x86/op_int.c
index 6fb868a..7c2ae1d 100644
--- a/src/arch/x86/op_int.c
+++ b/src/arch/x86/op_int.c
@@ -49,25 +49,17 @@
 asm_x86_instr *x86_read_instr_int(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    asm_x86_operand *syscall;               /* Indice de l'appel système   */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    syscall = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(syscall), AOS_8_BITS, data, pos, len))
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_IMM8))
     {
-        free(syscall);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(syscall);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_jump.c b/src/arch/x86/op_jump.c
index 39683c0..b301b10 100644
--- a/src/arch/x86/op_jump.c
+++ b/src/arch/x86/op_jump.c
@@ -49,25 +49,17 @@
 asm_x86_instr *x86_read_instr_je_8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    asm_x86_operand *address;               /* Adresse visée réelle        */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO : 64bits */
-    address = x86_create_rel8_operand_in_32b(offset + 1, data, pos, len);
-    if (address == NULL)
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_REL8, offset))
     {
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(address);
-
     return result;
 
 }
@@ -92,25 +84,17 @@ asm_x86_instr *x86_read_instr_je_8(const uint8_t *data, off_t *pos, off_t len, u
 asm_x86_instr *x86_read_instr_jne_8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    asm_x86_operand *address;               /* Adresse visée réelle        */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO : 64bits */
-    address = x86_create_rel8_operand_in_32b(offset + 1, data, pos, len);
-    if (address == NULL)
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_REL8, offset))
     {
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(address);
-
     return result;
 
 }
@@ -135,25 +119,17 @@ asm_x86_instr *x86_read_instr_jne_8(const uint8_t *data, off_t *pos, off_t len,
 asm_x86_instr *x86_read_instr_jmp_8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    asm_x86_operand *address;               /* Adresse visée réelle        */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO : 64bits */
-    address = x86_create_rel8_operand_in_32b(offset + 1, data, pos, len);
-    if (address == NULL)
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_REL8, offset))
     {
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(address);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_lea.c b/src/arch/x86/op_lea.c
index 96e4def..bf63818 100644
--- a/src/arch/x86/op_lea.c
+++ b/src/arch/x86/op_lea.c
@@ -55,13 +55,7 @@ asm_x86_instr *x86_read_instr_lea(const uint8_t *data, off_t *pos, off_t len, ui
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
diff --git a/src/arch/x86/op_mov.c b/src/arch/x86/op_mov.c
index 8764526..01e04ff 100644
--- a/src/arch/x86/op_mov.c
+++ b/src/arch/x86/op_mov.c
@@ -49,34 +49,17 @@
 asm_x86_instr *x86_read_instr_mov_al_to_moffs8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    asm_x86_operand *value;                 /* Valeur portée               */
-    asm_x86_operand *reg;                   /* Registre de source          */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    value = x86_create_moffs8_operand(data, pos, len);
-    if (value == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_MOFFS8, X86_OTP_AL))
     {
         free(result);
         return NULL;
     }
 
-    reg = x86_create_r8_operand(0x00, true);
-    if (reg == NULL)
-    {
-        free(value);
-        free(result);
-        return NULL;
-    }
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(value);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg);
-
     return result;
 
 }
@@ -102,42 +85,19 @@ asm_x86_instr *x86_read_instr_mov_e_ax_to_moffs1632(const uint8_t *data, off_t *
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *value;                 /* Valeur portée               */
-    asm_x86_operand *reg;                   /* Registre de source          */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    value = x86_create_moffs1632_operand(data, pos, len, oprsize == AOS_32_BITS);
-    if (value == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    reg = x86_create_r1632_operand(0x00, oprsize == AOS_32_BITS, true);
-    if (reg == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_MOFFS1632, X86_OTP_E_AX, oprsize))
     {
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(value);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg);
-
     return result;
 
 }
@@ -162,35 +122,17 @@ asm_x86_instr *x86_read_instr_mov_e_ax_to_moffs1632(const uint8_t *data, off_t *
 asm_x86_instr *x86_read_instr_mov_imm8_to_rm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur portée               */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_rm8_operand(data, pos, len, true);
-    if (reg == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM8, X86_OTP_IMM8))
     {
         free(result);
         return NULL;
     }
 
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
-    {
-        free(reg);
-        free(value);
-        free(result);
-        return NULL;
-    }
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
@@ -204,7 +146,7 @@ asm_x86_instr *x86_read_instr_mov_imm8_to_rm8(const uint8_t *data, off_t *pos, o
 *                offset = adresse virtuelle de l'instruction.                 *
 *                proc   = architecture ciblée par le désassemblage.           *
 *                                                                             *
-*  Description : Décode une instruction de type 'mov al, ...' (8 bits).       *
+*  Description : Décode une instruction de type 'mov' (16 ou 32 bits).        *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -212,27 +154,44 @@ asm_x86_instr *x86_read_instr_mov_imm8_to_rm8(const uint8_t *data, off_t *pos, o
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_mov_moffs8_to_al(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_mov_imm1632_to_r1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
+    AsmOperandSize oprsize;                 /* Taille des opérandes        */
     asm_x86_operand *reg;                   /* Registre de destination     */
     asm_x86_operand *value;                 /* Valeur portée               */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
-    reg = x86_create_r8_operand(0x00, true);
+    ASM_INSTRUCTION(result)->opcode = data[*pos];
+
+
+    /*
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_OP_R1632, oprsize, 0x40))
+    {
+        free(result);
+        return NULL;
+    }
+    */
+
+
+
+
+
+    reg = x86_create_reg1632_operand(data[(*pos)++], oprsize == AOS_32_BITS, 0xb8);
     if (reg == NULL)
     {
         free(result);
         return NULL;
     }
 
-    value = x86_create_moffs8_operand(data, pos, len);
-    if (value == NULL)
+    value = create_new_x86_operand();
+    if (!fill_imm_operand(ASM_OPERAND(value), oprsize, data, pos, len))
     {
         free(reg);
+        free(value);
         free(result);
         return NULL;
     }
@@ -256,7 +215,7 @@ asm_x86_instr *x86_read_instr_mov_moffs8_to_al(const uint8_t *data, off_t *pos,
 *                offset = adresse virtuelle de l'instruction.                 *
 *                proc   = architecture ciblée par le désassemblage.           *
 *                                                                             *
-*  Description : Décode une instruction de type 'mov [e]ax, ...' (16/32 bits).*
+*  Description : Décode une instruction de type 'mov' (16 ou 32 bits).        *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -264,57 +223,28 @@ asm_x86_instr *x86_read_instr_mov_moffs8_to_al(const uint8_t *data, off_t *pos,
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_mov_moffs1632_to_e_ax(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_mov_imm1632_to_rm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur portée               */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_r1632_operand(0x00, oprsize == AOS_32_BITS, true);
-    if (reg == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    value = x86_create_moffs1632_operand(data, pos, len, oprsize == AOS_32_BITS);
-    if (value == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM1632, oprsize))
     {
-        free(reg);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
 
 
-
-
-
-
-
-
 /******************************************************************************
 *                                                                             *
 *  Paramètres  : data   = flux de données à analyser.                         *
@@ -323,7 +253,7 @@ asm_x86_instr *x86_read_instr_mov_moffs1632_to_e_ax(const uint8_t *data, off_t *
 *                offset = adresse virtuelle de l'instruction.                 *
 *                proc   = architecture ciblée par le désassemblage.           *
 *                                                                             *
-*  Description : Décode une instruction de type 'mov' (16 ou 32 bits).        *
+*  Description : Décode une instruction de type 'mov al, ...' (8 bits).       *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -331,52 +261,20 @@ asm_x86_instr *x86_read_instr_mov_moffs1632_to_e_ax(const uint8_t *data, off_t *
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_mov_with_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_mov_moffs8_to_al(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg2;                  /* Registre de source          */
-    asm_x86_operand *reg1;                  /* Registre de destination     */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
-
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg2 = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg2 == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    if ((data[*pos] & 0xc0) == 0xc0)
-    {
-        reg1 = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, true);
-        (*pos)++;
-    }
-    else reg1 = x86_create_content1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
-
-    if (reg1 == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_AL, X86_OTP_MOFFS8))
     {
         free(result);
-        free(reg2);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg1);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg2);
-
     return result;
 
 }
@@ -390,7 +288,7 @@ asm_x86_instr *x86_read_instr_mov_with_reg1632(const uint8_t *data, off_t *pos,
 *                offset = adresse virtuelle de l'instruction.                 *
 *                proc   = architecture ciblée par le désassemblage.           *
 *                                                                             *
-*  Description : Décode une instruction de type 'mov' (16 ou 32 bits).        *
+*  Description : Décode une instruction de type 'mov [e]ax, ...' (16/32 bits).*
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -398,47 +296,23 @@ asm_x86_instr *x86_read_instr_mov_with_reg1632(const uint8_t *data, off_t *pos,
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_mov_to_1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_mov_moffs1632_to_e_ax(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur portée               */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
-    ASM_INSTRUCTION(result)->opcode = data[*pos];
+    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_reg1632_operand(data[(*pos)++], oprsize == AOS_32_BITS, 0xb8);
-    if (reg == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_E_AX, X86_OTP_MOFFS1632, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), oprsize, data, pos, len))
-    {
-        free(reg);
-        free(value);
-        free(result);
-        return NULL;
-    }
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
@@ -460,46 +334,23 @@ asm_x86_instr *x86_read_instr_mov_to_1632(const uint8_t *data, off_t *pos, off_t
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_mov_from_content_1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_mov_r1632_to_rm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg1;                  /* Registre de destination     */
-    asm_x86_operand *reg2;                  /* Registre de source          */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg1 = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg1 == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    reg2 = x86_create_content1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
-    if (reg2 == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_R1632, oprsize))
     {
         free(result);
-        free(reg1);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg1);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg2);
-
     return result;
 
 }
@@ -521,47 +372,23 @@ asm_x86_instr *x86_read_instr_mov_from_content_1632(const uint8_t *data, off_t *
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_mov_to_content_1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_mov_rm1632_to_r1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur portée               */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_content1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
-    if (reg == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), oprsize, data, pos, len))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_R1632, X86_OTP_RM1632, oprsize))
     {
-        free(reg);
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_or.c b/src/arch/x86/op_or.c
index dfd02c6..0dd7cf3 100644
--- a/src/arch/x86/op_or.c
+++ b/src/arch/x86/op_or.c
@@ -46,53 +46,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_or8_with_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_or_rm1632_with_imm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur empilée              */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO ! */
-    if ((data[*pos] & 0xc0) != 0xc0)
-        return NULL;
-
-    reg = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    (*pos)++;
-
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
     {
-        free(reg);
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_pop.c b/src/arch/x86/op_pop.c
index 891985c..ab0d278 100644
--- a/src/arch/x86/op_pop.c
+++ b/src/arch/x86/op_pop.c
@@ -46,36 +46,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_pop_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_pop_r1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[*pos];
 
-    reg = x86_create_reg1632_operand(data[(*pos)++], oprsize == AOS_32_BITS, 0x58);
-    if (reg == NULL)
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_OP_R1632, oprsize, 0x58))
     {
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_push.c b/src/arch/x86/op_push.c
index 153c70d..ce76919 100644
--- a/src/arch/x86/op_push.c
+++ b/src/arch/x86/op_push.c
@@ -47,36 +47,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_push_content(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_push_imm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *content;               /* Registre de source          */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    content = x86_create_content1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
-    if (content == NULL)
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_IMM1632, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(content);
-
     return result;
 
 }
@@ -98,37 +85,23 @@ asm_x86_instr *x86_read_instr_push_content(const uint8_t *data, off_t *pos, off_
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_push_imm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_push_r1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *value;                 /* Valeur empilée              */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
-    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
+    ASM_INSTRUCTION(result)->opcode = data[*pos];
 
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), oprsize, data, pos, len))
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_OP_R1632, oprsize, 0x50))
     {
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(value);
-
     return result;
 
 }
@@ -150,36 +123,23 @@ asm_x86_instr *x86_read_instr_push_imm1632(const uint8_t *data, off_t *pos, off_
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_push_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_push_rm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
-    ASM_INSTRUCTION(result)->opcode = data[*pos];
+    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_reg1632_operand(data[(*pos)++], oprsize == AOS_32_BITS, 0x50);
-    if (reg == NULL)
+    if (!x86_read_one_operand(result, data, pos, len, X86_OTP_RM1632, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 1;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_sar.c b/src/arch/x86/op_sar.c
index 187c2bb..70b57c9 100644
--- a/src/arch/x86/op_sar.c
+++ b/src/arch/x86/op_sar.c
@@ -50,43 +50,19 @@ asm_x86_instr *x86_read_instr_sar_rm1632_with_imm8(const uint8_t *data, off_t *p
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur portée               */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_rm1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
-    if (reg == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
-    {
-        free(reg);
-        free(value);
-        free(result);
-        return NULL;
-    }
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_sbb.c b/src/arch/x86/op_sbb.c
index b712320..eba4e04 100644
--- a/src/arch/x86/op_sbb.c
+++ b/src/arch/x86/op_sbb.c
@@ -46,53 +46,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_sbb8_with_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_sbb_rm1632_with_imm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur empilée              */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO ! */
-    if ((data[*pos] & 0xc0) != 0xc0)
-        return NULL;
-
-    reg = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    (*pos)++;
-
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
     {
-        free(reg);
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_sub.c b/src/arch/x86/op_sub.c
index 18d8dce..7c282cc 100644
--- a/src/arch/x86/op_sub.c
+++ b/src/arch/x86/op_sub.c
@@ -46,53 +46,23 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_sub8_with_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_sub_imm8_from_rm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur empilée              */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO ! */
-    if ((data[*pos] & 0xc0) != 0xc0)
-        return NULL;
-
-    reg = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    (*pos)++;
-
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
-    {
-        free(reg);
-        free(value);
-        free(result);
-        return NULL;
-    }
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
@@ -114,50 +84,23 @@ asm_x86_instr *x86_read_instr_sub8_with_reg1632(const uint8_t *data, off_t *pos,
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_sub_r1632_to_rm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_sub_r1632_from_rm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    off_t reg1_pos;                         /* POsition après lecture #1   */
-    asm_x86_operand *reg1;                  /* Registre de destination     */
-    asm_x86_operand *reg2;                  /* Registre de source          */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg1_pos = *pos;
-    reg1 = x86_create_rm1632_operand(data, &reg1_pos, len, oprsize == AOS_32_BITS, true);
-    if (reg1 == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_R1632, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    reg2 = x86_create_r1632_operand(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg2 == NULL)
-    {
-        free(result);
-        free(reg1);
-        return NULL;
-    }
-
-    *pos = reg1_pos;
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg1);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg2);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_test.c b/src/arch/x86/op_test.c
index aa80787..1d8d18a 100644
--- a/src/arch/x86/op_test.c
+++ b/src/arch/x86/op_test.c
@@ -49,35 +49,17 @@
 asm_x86_instr *x86_read_instr_test_al(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur portée               */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_r8_operand(0x00, true);
-    if (reg == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_AL, X86_OTP_IMM8))
     {
         free(result);
         return NULL;
     }
 
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
-    {
-        free(reg);
-        free(value);
-        free(result);
-        return NULL;
-    }
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
@@ -103,43 +85,19 @@ asm_x86_instr *x86_read_instr_test_e_ax(const uint8_t *data, off_t *pos, off_t l
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur portée               */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg = x86_create_r1632_operand(0x00, oprsize == AOS_32_BITS, true);
-    if (reg == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_E_AX, X86_OTP_IMM1632, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), oprsize, data, pos, len))
-    {
-        free(reg);
-        free(value);
-        free(result);
-        return NULL;
-    }
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
-
     return result;
 
 }
@@ -161,41 +119,20 @@ asm_x86_instr *x86_read_instr_test_e_ax(const uint8_t *data, off_t *pos, off_t l
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_test_rm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_test_rm8_with_r8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    off_t reg1_pos;                         /* POsition après lecture #1   */
-    asm_x86_operand *reg1;                  /* Registre de destination     */
-    asm_x86_operand *reg2;                  /* Registre de source          */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg1_pos = *pos;
-    reg1 = x86_create_rm8_operand(data, &reg1_pos, len, true);
-    if (reg1 == NULL)
-    {
-        free(result);
-        return NULL;
-    }
-
-    reg2 = x86_create_r8_operand(data[*pos], false);
-    if (reg2 == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM8, X86_OTP_R8))
     {
         free(result);
-        free(reg1);
         return NULL;
     }
 
-    *pos = reg1_pos;
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg1);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg2);
-
     return result;
 
 }
@@ -217,50 +154,23 @@ asm_x86_instr *x86_read_instr_test_rm8(const uint8_t *data, off_t *pos, off_t le
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_test_rm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_test_rm1632_with_r1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    off_t reg1_pos;                         /* POsition après lecture #1   */
-    asm_x86_operand *reg1;                  /* Registre de destination     */
-    asm_x86_operand *reg2;                  /* Registre de source          */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    reg1_pos = *pos;
-    reg1 = x86_create_rm1632_operand(data, &reg1_pos, len, oprsize == AOS_32_BITS, true);
-    if (reg1 == NULL)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_R1632, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    reg2 = x86_create_r1632_operand(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg2 == NULL)
-    {
-        free(result);
-        free(reg1);
-        return NULL;
-    }
-
-    *pos = reg1_pos;
-
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
-
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg1);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg2);
-
     return result;
 
 }
diff --git a/src/arch/x86/op_xor.c b/src/arch/x86/op_xor.c
index 0f23f26..8d44f9c 100644
--- a/src/arch/x86/op_xor.c
+++ b/src/arch/x86/op_xor.c
@@ -38,7 +38,7 @@
 *                offset = adresse virtuelle de l'instruction.                 *
 *                proc   = architecture ciblée par le désassemblage.           *
 *                                                                             *
-*  Description : Décode une instruction de type 'xor' (16 ou 32 bits).        *
+*  Description : Décode une instruction de type 'xor al, ...' (8 bits).       *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -46,51 +46,168 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_xor_with_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_xor_al_with_imm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
-    AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg2;                  /* Registre de source          */
-    asm_x86_operand *reg1;                  /* Registre de destination     */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
+    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
+
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_AL, X86_OTP_IMM8))
     {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
+        free(result);
+        return NULL;
     }
-    else oprsize = get_x86_current_operand_size(proc);
+
+    return result;
+
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : data   = flux de données à analyser.                         *
+*                pos    = position courante dans ce flux. [OUT]               *
+*                len    = taille totale des données à analyser.               *
+*                offset = adresse virtuelle de l'instruction.                 *
+*                proc   = architecture ciblée par le désassemblage.           *
+*                                                                             *
+*  Description : Décode une instruction de type 'xor [e]ax, ...' (16/32 bits).*
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_xor_e_ax_with_imm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+{
+    asm_x86_instr *result;                  /* Instruction à retourner     */
+    AsmOperandSize oprsize;                 /* Taille des opérandes        */
+
+    result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
+
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO ! */
-    if ((data[*pos] & 0xc0) != 0xc0)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_E_AX, X86_OTP_IMM1632, oprsize))
+    {
+        free(result);
         return NULL;
+    }
+
+    return result;
 
-    reg1 = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, true);
-    if (reg1 == NULL)
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : data   = flux de données à analyser.                         *
+*                pos    = position courante dans ce flux. [OUT]               *
+*                len    = taille totale des données à analyser.               *
+*                offset = adresse virtuelle de l'instruction.                 *
+*                proc   = architecture ciblée par le désassemblage.           *
+*                                                                             *
+*  Description : Décode une instruction de type 'xor' (8 bits).               *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_xor_rm8_with_imm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+{
+    asm_x86_instr *result;                  /* Instruction à retourner     */
+    AsmOperandSize oprsize;                 /* Taille des opérandes        */
+
+    result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
+
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
+
+    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
+
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM8, X86_OTP_IMM8, oprsize))
     {
         free(result);
         return NULL;
     }
 
-    reg2 = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg2 == NULL)
+    return result;
+
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : data   = flux de données à analyser.                         *
+*                pos    = position courante dans ce flux. [OUT]               *
+*                len    = taille totale des données à analyser.               *
+*                offset = adresse virtuelle de l'instruction.                 *
+*                proc   = architecture ciblée par le désassemblage.           *
+*                                                                             *
+*  Description : Décode une instruction de type 'xor' (16 ou 32 bits).        *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_xor_rm1632_with_imm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+{
+    asm_x86_instr *result;                  /* Instruction à retourner     */
+    AsmOperandSize oprsize;                 /* Taille des opérandes        */
+
+    result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
+
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
+
+    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
+
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM1632, oprsize))
     {
         free(result);
-        free(reg1);
         return NULL;
     }
 
-    (*pos)++;
+    return result;
+
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : data   = flux de données à analyser.                         *
+*                pos    = position courante dans ce flux. [OUT]               *
+*                len    = taille totale des données à analyser.               *
+*                offset = adresse virtuelle de l'instruction.                 *
+*                proc   = architecture ciblée par le désassemblage.           *
+*                                                                             *
+*  Description : Décode une instruction de type 'xor' (8 bits).               *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_xor_r8_with_rm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+{
+    asm_x86_instr *result;                  /* Instruction à retourner     */
+
+    result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
+    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg1);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg2);
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_R8, X86_OTP_RM8))
+    {
+        free(result);
+        return NULL;
+    }
 
     return result;
 
@@ -113,52 +230,133 @@ asm_x86_instr *x86_read_instr_xor_with_reg1632(const uint8_t *data, off_t *pos,
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_xor8_with_reg1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_xor_r1632_with_rm1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
 {
     asm_x86_instr *result;                  /* Instruction à retourner     */
     AsmOperandSize oprsize;                 /* Taille des opérandes        */
-    asm_x86_operand *reg;                   /* Registre de destination     */
-    asm_x86_operand *value;                 /* Valeur empilée              */
 
     result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
 
-    /* Utilisation des registres 32 bits ? */
-    if (data[*pos] == 0x66)
-    {
-        oprsize = switch_x86_operand_size(proc);
-        (*pos)++;
-    }
-    else oprsize = get_x86_current_operand_size(proc);
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    /* TODO ! */
-    if ((data[*pos] & 0xc0) != 0xc0)
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_R1632, X86_OTP_RM1632, oprsize))
+    {
+        free(result);
         return NULL;
+    }
+
+    return result;
+
+}
+
 
-    reg = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
-    if (reg == NULL)
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : data   = flux de données à analyser.                         *
+*                pos    = position courante dans ce flux. [OUT]               *
+*                len    = taille totale des données à analyser.               *
+*                offset = adresse virtuelle de l'instruction.                 *
+*                proc   = architecture ciblée par le désassemblage.           *
+*                                                                             *
+*  Description : Décode une instruction de type 'xor' (8 bits).               *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_xor_rm8_with_r8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+{
+    asm_x86_instr *result;                  /* Instruction à retourner     */
+
+    result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
+
+    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
+
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM8, X86_OTP_R8))
     {
         free(result);
         return NULL;
     }
 
-    (*pos)++;
+    return result;
 
-    value = create_new_x86_operand();
-    if (!fill_imm_operand(ASM_OPERAND(value), AOS_8_BITS, data, pos, len))
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : data   = flux de données à analyser.                         *
+*                pos    = position courante dans ce flux. [OUT]               *
+*                len    = taille totale des données à analyser.               *
+*                offset = adresse virtuelle de l'instruction.                 *
+*                proc   = architecture ciblée par le désassemblage.           *
+*                                                                             *
+*  Description : Décode une instruction de type 'xor' (16 ou 32 bits).        *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_xor_rm1632_with_imm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+{
+    asm_x86_instr *result;                  /* Instruction à retourner     */
+    AsmOperandSize oprsize;                 /* Taille des opérandes        */
+
+    result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
+
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
+
+    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
+
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
     {
-        free(reg);
-        free(value);
         free(result);
         return NULL;
     }
 
-    ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
-    ASM_INSTRUCTION(result)->operands_count = 2;
+    return result;
+
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : data   = flux de données à analyser.                         *
+*                pos    = position courante dans ce flux. [OUT]               *
+*                len    = taille totale des données à analyser.               *
+*                offset = adresse virtuelle de l'instruction.                 *
+*                proc   = architecture ciblée par le désassemblage.           *
+*                                                                             *
+*  Description : Décode une instruction de type 'xor' (16 ou 32 bits).        *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_xor_rm1632_with_r1632(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+{
+    asm_x86_instr *result;                  /* Instruction à retourner     */
+    AsmOperandSize oprsize;                 /* Taille des opérandes        */
+
+    result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));
+
+    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
 
-    ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg);
-    ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(value);
+    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
+
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_R1632, oprsize))
+    {
+        free(result);
+        return NULL;
+    }
 
     return result;
 
diff --git a/src/arch/x86/opcodes.h b/src/arch/x86/opcodes.h
index 07d51e9..cbadcf5 100644
--- a/src/arch/x86/opcodes.h
+++ b/src/arch/x86/opcodes.h
@@ -35,19 +35,19 @@
 
 
 /* Décode une instruction de type 'adc' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_adc8_with_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_adc_imm8_to_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'add' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_add8_with_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_add_imm8_to_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'add' (16 ou 32 bits). */
 asm_x86_instr *x86_read_instr_add_imm1632_to_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'and' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_and8_with_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_and_rm1632_with_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'call'. */
-asm_x86_instr *x86_read_instr_call(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_call_rel1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'call' (16 ou 32 bits). */
 asm_x86_instr *x86_read_instr_call_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
@@ -62,13 +62,13 @@ asm_x86_instr *x86_read_instr_cmp_rm1632_with_imm8(const uint8_t *, off_t *, off
 asm_x86_instr *x86_read_instr_cmp_rm1632_with_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'dec'. */
-asm_x86_instr *x86_read_instr_dec_1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_dec_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'hlt'. */
 asm_x86_instr *x86_read_instr_hlt(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'inc'. */
-asm_x86_instr *x86_read_instr_inc_1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_inc_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'int'. */
 asm_x86_instr *x86_read_instr_int(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
@@ -97,6 +97,12 @@ asm_x86_instr *x86_read_instr_mov_e_ax_to_moffs1632(const uint8_t *, off_t *, of
 /* Décode une instruction de type 'mov' (8 bits). */
 asm_x86_instr *x86_read_instr_mov_imm8_to_rm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
+/* Décode une instruction de type 'mov' (16 ou 32 bits). */
+asm_x86_instr *x86_read_instr_mov_imm1632_to_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'mov' (16 ou 32 bits). */
+asm_x86_instr *x86_read_instr_mov_imm1632_to_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
 /* Décode une instruction de type 'mov al, ...' (8 bits). */
 asm_x86_instr *x86_read_instr_mov_moffs8_to_al(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
@@ -104,34 +110,28 @@ asm_x86_instr *x86_read_instr_mov_moffs8_to_al(const uint8_t *, off_t *, off_t,
 asm_x86_instr *x86_read_instr_mov_moffs1632_to_e_ax(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'mov' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_mov_from_content_1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
-
-/* Décode une instruction de type 'mov' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_mov_to_1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
-
-/* Décode une instruction de type 'mov' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_mov_to_content_1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_mov_r1632_to_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'mov' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_mov_with_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_mov_rm1632_to_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'nop'. */
 asm_x86_instr *x86_read_instr_nop(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'or' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_or8_with_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_or_rm1632_with_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'pop' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_pop_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_pop_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'push' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_push_content(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_push_imm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'push' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_push_imm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_push_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'push' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_push_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_push_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'ret'. */
 asm_x86_instr *x86_read_instr_ret(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
@@ -140,13 +140,13 @@ asm_x86_instr *x86_read_instr_ret(const uint8_t *, off_t *, off_t, uint64_t, con
 asm_x86_instr *x86_read_instr_sar_rm1632_with_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'sbb'. */
-asm_x86_instr *x86_read_instr_sbb8_with_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_sbb_rm1632_with_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'sub'. */
-asm_x86_instr *x86_read_instr_sub8_with_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_sub_imm8_from_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'sub' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_sub_r1632_to_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_sub_r1632_from_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'test al, ...' (8 bits). */
 asm_x86_instr *x86_read_instr_test_al(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
@@ -155,16 +155,37 @@ asm_x86_instr *x86_read_instr_test_al(const uint8_t *, off_t *, off_t, uint64_t,
 asm_x86_instr *x86_read_instr_test_e_ax(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'test' (8 bits). */
-asm_x86_instr *x86_read_instr_test_rm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_test_rm8_with_r8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'test' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_test_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_test_rm1632_with_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'xor al, ...' (8 bits). */
+asm_x86_instr *x86_read_instr_xor_al_with_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'xor [e]ax, ...' (16/32 bits). */
+asm_x86_instr *x86_read_instr_xor_e_ax_with_imm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'xor' (8 bits). */
+asm_x86_instr *x86_read_instr_xor_rm8_with_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'xor' (16 ou 32 bits). */
+asm_x86_instr *x86_read_instr_xor_rm1632_with_imm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'xor' (8 bits). */
+asm_x86_instr *x86_read_instr_xor_r8_with_rm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'xor' (16 ou 32 bits). */
+asm_x86_instr *x86_read_instr_xor_r1632_with_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'xor' (8 bits). */
+asm_x86_instr *x86_read_instr_xor_rm8_with_r8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'xor' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_xor_with_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_xor_rm1632_with_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'xor' (16 ou 32 bits). */
-asm_x86_instr *x86_read_instr_xor8_with_reg1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_xor_rm1632_with_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 
 
diff --git a/src/arch/x86/operand.c b/src/arch/x86/operand.c
index 10a908e..375b0a5 100644
--- a/src/arch/x86/operand.c
+++ b/src/arch/x86/operand.c
@@ -25,6 +25,7 @@
 
 #include <malloc.h>
 #include <math.h>
+#include <stdarg.h>
 #include <stdio.h>
 
 
@@ -33,6 +34,9 @@
 
 
 
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+
+
 
 /* Liste des registres 8 bits */
 typedef enum _X868bRegister
@@ -127,6 +131,12 @@ void _x86_print_reg_operand(const x86_register *reg, AsmOperandSize, char *, siz
 
 
 
+/* Crée une opérande renvoyant vers un registre 16 ou 32 bits. */
+asm_x86_operand *x86_create_r1632_operand_from_opcode(uint8_t, bool, uint8_t);
+
+
+
+
 
 /******************************************************************************
 *                                                                             *
@@ -471,7 +481,6 @@ asm_x86_operand *x86_create_r8_operand(uint8_t data, bool first)
 *  Paramètres  : data  = flux de données à analyser.                          *
 *                pos   = position courante dans ce flux. [OUT]                *
 *                len   = taille totale des données à analyser.                *
-*                first = indique la partie du ModR/M à traiter.               *
 *                                                                             *
 *  Description : Crée une opérande à partir d'un registre/une mémoire 8 bits. *
 *                                                                             *
@@ -481,14 +490,14 @@ asm_x86_operand *x86_create_r8_operand(uint8_t data, bool first)
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_operand *x86_create_rm8_operand(const uint8_t *data, off_t *pos, off_t len, bool first)
+asm_x86_operand *x86_create_rm8_operand(const uint8_t *data, off_t *pos, off_t len, ...)
 {
     asm_x86_operand *result;                /* Registre à retourner        */
     uint8_t mod;                            /* Modificateur présent        */
 
     /* Registre simple... */
 
-    result = x86_create_r8_operand(data[*pos], first);
+    result = x86_create_r8_operand(data[*pos], true);
     if (result == NULL) return NULL;
 
     mod = (data[*pos] & 0xc0);
@@ -628,11 +637,44 @@ asm_x86_operand *x86_create_r1632_operand(uint8_t data, bool is_reg32, bool firs
 
 /******************************************************************************
 *                                                                             *
+*  Paramètres  : data     = donnée à analyser.                                *
+*                is_reg32 = indique si le registre est un registre 32 bits.   *
+*                base     = valeur du premier registre.                       *
+*                                                                             *
+*  Description : Crée une opérande renvoyant vers un registre 16 ou 32 bits.  *
+*                                                                             *
+*  Retour      : Opérande mise en place ou NULL.                              *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_operand *x86_create_r1632_operand_from_opcode(uint8_t data, bool is_reg32, uint8_t base)
+{
+    asm_x86_operand *result;                /* Registre à retourner        */
+
+    result = create_new_x86_operand();
+
+    ASM_OPERAND(result)->type = AOT_REG;
+    ASM_OPERAND(result)->size = (is_reg32 ? AOS_32_BITS : AOS_16_BITS);
+
+    if (!get_x86_register(&result->rindex, ASM_OPERAND(result)->size, data - base))
+    {
+        free(result);
+        return NULL;
+    }
+
+    return result;
+
+}
+
+
+/******************************************************************************
+*                                                                             *
 *  Paramètres  : data     = flux de données à analyser.                       *
 *                pos      = position courante dans ce flux. [OUT]             *
 *                len      = taille totale des données à analyser.             *
 *                is_reg32 = indique si le registre est un registre 32 bits.   *
-*                first    = indique la partie du ModR/M à traiter.            *
 *                                                                             *
 *  Description : Crée une opérande à partir d'un registre/une mémoire 16/32b. *
 *                                                                             *
@@ -642,14 +684,14 @@ asm_x86_operand *x86_create_r1632_operand(uint8_t data, bool is_reg32, bool firs
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_operand *x86_create_rm1632_operand(const uint8_t *data, off_t *pos, off_t len, bool is_reg32, bool first)
+asm_x86_operand *x86_create_rm1632_operand(const uint8_t *data, off_t *pos, off_t len, bool is_reg32, ...)
 {
     asm_x86_operand *result;                /* Registre à retourner        */
     uint8_t mod;                            /* Modificateur présent        */
 
     /* Registre simple... */
 
-    result = x86_create_r1632_operand(data[*pos], is_reg32, first);
+    result = x86_create_r1632_operand(data[*pos], is_reg32, true);
     if (result == NULL) return NULL;
 
     mod = (data[*pos] & 0xc0);
@@ -1169,8 +1211,6 @@ asm_x86_operand *x86_create_moffs1632_operand(const uint8_t *data, off_t *pos, o
 
 void x86_print_moffs_operand(const asm_x86_operand *operand, char *buffer, size_t len, AsmSyntax syntax)
 {
-    size_t pos;                             /* Position de traitement      */
-
     switch (syntax)
     {
         case ASX_INTEL:
@@ -1239,3 +1279,357 @@ asm_x86_operand *x86_create_rel8_operand_in_32b(uint64_t base, const uint8_t *da
     return result;
 
 }
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : data     = flux de données à analyser.                       *
+*                pos      = position courante dans ce flux. [OUT]             *
+*                len      = taille totale des données à analyser.             *
+*                is_reg32 = indique si le registre est un registre 32 bits.   *
+*                                                                             *
+*  Description : Crée une opérande à partir d'une adresse relative (16/32b).  *
+*                                                                             *
+*  Retour      : Opérande mise en place ou NULL.                              *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_operand *x86_create_rel1632_operand_in_32b(uint64_t base, const uint8_t *data, off_t *pos, off_t len, bool is_reg32)
+{
+    asm_x86_operand *result;                /* Emplacement à retourner     */
+    off_t init_pos;                         /* Position avant lecture      */
+    int8_t offset;                          /* Décallage à appliquer       */
+    uint32_t address;                       /* Adresse finale visée        */
+
+    result = create_new_x86_operand();
+
+    init_pos = *pos;
+    address = base;
+
+    if (!read_imm_value(is_reg32 ? AOS_32_BITS : AOS_16_BITS, data, pos, len, &offset))
+    {
+        free(result);
+        return NULL;
+    }
+
+    address = base + (*pos - init_pos) + offset;
+
+    if (!fill_imm_operand_with_value(ASM_OPERAND(result), AOS_32_BITS, &address))
+    {
+        free(result);
+        return NULL;
+    }
+
+    return result;
+
+}
+
+
+
+/* ---------------------------------------------------------------------------------- */
+/*                           AIDE A LA CREATION D'OPERANDES                           */
+/* ---------------------------------------------------------------------------------- */
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : instr = instruction dont la définition est à compléter. [OUT]*
+*                data  = flux de données à analyser.                          *
+*                pos   = position courante dans ce flux. [OUT]                *
+*                len   = taille totale des données à analyser.                *
+*                type  = type de l'opérande.                                  *
+*                ...   = éventuelle(s) information(s) complémentaire(s).      *
+*                                                                             *
+*  Description : Procède à la lecture d'un opérande donné.                    *
+*                                                                             *
+*  Retour      : Bilan de l'opération : true en cas de succès, false sinon.   *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+bool x86_read_one_operand(asm_x86_instr *instr, const uint8_t *data, off_t *pos, off_t len, X86OperandType type, ...)
+{
+    va_list ap;                             /* Liste des compléments       */
+    AsmOperandSize oprsize;                 /* Taille des opérandes        */
+    uint64_t offset;                        /* Adresse courante            */
+    uint8_t base;                           /* Indice du premier registre  */
+    asm_x86_operand *op;                    /* Opérande unique décodé      */
+
+    va_start(ap, type);
+
+    /* Lecture du premier opérande */
+
+    switch (type)
+    {
+        case X86_OTP_IMM8:
+            op = create_new_x86_operand();
+            if (!fill_imm_operand(ASM_OPERAND(op), AOS_8_BITS, data, pos, len))
+            {
+                free(op);
+                op = NULL;
+            }
+            break;
+
+        case X86_OTP_IMM1632:
+            oprsize = va_arg(ap, AsmOperandSize);
+            op = create_new_x86_operand();
+            if (!fill_imm_operand(ASM_OPERAND(op), oprsize, data, pos, len))
+            {
+                free(op);
+                op = NULL;
+            }
+            break;
+
+        case X86_OTP_REL8:
+            offset = va_arg(ap, uint64_t);
+            /* TODO : 64bits */
+            op = x86_create_rel8_operand_in_32b(offset + 1, data, pos, len);
+            break;
+
+        case X86_OTP_REL1632:
+            oprsize = va_arg(ap, AsmOperandSize);
+            offset = va_arg(ap, uint64_t);
+            /* TODO : 64bits */
+            op = x86_create_rel1632_operand_in_32b(offset + 1, data, pos, len, oprsize == AOS_32_BITS);
+            break;
+
+        case X86_OTP_R8:
+            op = x86_create_r8_operand(data[(*pos)++], true);
+            break;
+
+        case X86_OTP_R1632:
+            oprsize = va_arg(ap, AsmOperandSize);
+            op = x86_create_r1632_operand(data[(*pos)++], oprsize == AOS_32_BITS, true);
+            break;
+
+        case X86_OTP_OP_R1632:
+            oprsize = va_arg(ap, AsmOperandSize);
+            base = (uint8_t)va_arg(ap, int);
+            op = x86_create_r1632_operand_from_opcode(data[(*pos)++], oprsize == AOS_32_BITS, base);
+            break;
+
+        case X86_OTP_RM8:
+            op = x86_create_rm8_operand(data, pos, len);
+            break;
+
+        case X86_OTP_RM1632:
+            oprsize = va_arg(ap, AsmOperandSize);
+            op = x86_create_rm1632_operand(data, pos, len, oprsize == AOS_32_BITS);
+            break;
+
+        case X86_OTP_AL:
+            op = x86_create_r8_operand(0x00, true);
+            break;
+
+        case X86_OTP_E_AX:
+            oprsize = va_arg(ap, AsmOperandSize);
+            op = x86_create_r1632_operand(0x00, oprsize == AOS_32_BITS, true);
+            break;
+
+    }
+
+    va_end(ap);
+
+    if (op == NULL) return false;
+
+    /* Assemblage final */
+
+    ASM_INSTRUCTION(instr)->operands = (asm_operand **)calloc(1, sizeof(asm_operand *));
+    ASM_INSTRUCTION(instr)->operands_count = 1;
+
+    ASM_INSTRUCTION(instr)->operands[0] = ASM_OPERAND(op);
+
+    return true;
+
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : instr = instruction dont la définition est à compléter. [OUT]*
+*                data  = flux de données à analyser.                          *
+*                pos   = position courante dans ce flux. [OUT]                *
+*                len   = taille totale des données à analyser.                *
+*                type1 = type du premier opérande.                            *
+*                type2 = type du second opérande.                             *
+*                ...   = éventuelle(s) information(s) complémentaire(s).      *
+*                                                                             *
+*  Description : Procède à la lecture de deux opérandes donnés.               *
+*                                                                             *
+*  Retour      : Bilan de l'opération : true en cas de succès, false sinon.   *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+bool x86_read_two_operands(asm_x86_instr *instr, const uint8_t *data, off_t *pos, off_t len, X86OperandType type1, X86OperandType type2, ...)
+{
+    va_list ap;                             /* Liste des compléments       */
+    AsmOperandSize oprsize;                 /* Taille des opérandes        */
+    bool op1_first;                         /* Position de l'opérande  #1  */
+    bool op2_first;                         /* Position de l'opérande  #2  */
+    off_t op1_pos;                          /* Position après lecture #1   */
+    asm_x86_operand *op1;                   /* Premier opérande décodé     */
+    off_t op2_pos;                          /* Position après lecture #2   */
+    asm_x86_operand *op2;                   /* Second opérande décodé      */
+
+    va_start(ap, type2);
+
+    oprsize = AOS_UNDEFINED;
+
+    if (type1 & X86_OTP_RM_TYPE)
+    {
+        op1_first = true;
+        op2_first = false;
+    }
+    else if (type2 & X86_OTP_RM_TYPE)
+    {
+        op1_first = false;
+        op2_first = true;
+    }
+    else
+    {
+        op1_first = true;
+        op2_first = false;
+    }
+
+    /* Lecture du premier opérande */
+
+    op1_pos = *pos;
+
+    switch (type1)
+    {
+        case X86_OTP_MOFFS8:
+            op1 = x86_create_moffs8_operand(data, &op1_pos, len);
+            break;
+
+        case X86_OTP_MOFFS1632:
+            oprsize = va_arg(ap, AsmOperandSize);
+            op1 = x86_create_moffs1632_operand(data, &op1_pos, len, oprsize == AOS_32_BITS);
+            break;
+
+        case X86_OTP_R8:
+            op1 = x86_create_r8_operand(data[op1_pos++], op1_first);
+            break;
+
+        case X86_OTP_R1632:
+            oprsize = va_arg(ap, AsmOperandSize);
+            op1 = x86_create_r1632_operand(data[op1_pos++], oprsize == AOS_32_BITS, op1_first);
+            break;
+
+        case X86_OTP_RM8:
+            op1 = x86_create_rm8_operand(data, &op1_pos, len);
+            break;
+
+        case X86_OTP_RM1632:
+            oprsize = va_arg(ap, AsmOperandSize);
+            op1 = x86_create_rm1632_operand(data, &op1_pos, len, oprsize == AOS_32_BITS);
+            break;
+
+        case X86_OTP_AL:
+            op1 = x86_create_r8_operand(0x00, op1_first);
+            break;
+
+        case X86_OTP_E_AX:
+            oprsize = va_arg(ap, AsmOperandSize);
+            op1 = x86_create_r1632_operand(0x00, oprsize == AOS_32_BITS, op1_first);
+            break;
+
+    }
+
+    if (op1 == NULL)
+    {
+        va_end(ap);
+        return false;
+    }
+
+    /* Lecture du second opérande */
+
+    if ((type1 & X86_OTP_REG_TYPE || type1 & X86_OTP_RM_TYPE) && (type2 & X86_OTP_IMM_TYPE))
+        op2_pos = op1_pos;
+    else op2_pos = *pos;
+
+    switch (type2)
+    {
+        case X86_OTP_IMM8:
+            op2 = create_new_x86_operand();
+            if (!fill_imm_operand(ASM_OPERAND(op2), AOS_8_BITS, data, &op2_pos, len))
+            {
+                free(op2);
+                op2 = NULL;
+            }
+            break;
+
+        case X86_OTP_IMM1632:
+            if (oprsize == AOS_UNDEFINED) oprsize = va_arg(ap, AsmOperandSize);
+            op2 = create_new_x86_operand();
+            if (!fill_imm_operand(ASM_OPERAND(op2), oprsize, data, &op2_pos, len))
+            {
+                free(op2);
+                op2 = NULL;
+            }
+            break;
+
+        case X86_OTP_MOFFS8:
+            op2 = x86_create_moffs8_operand(data, &op2_pos, len);
+            break;
+
+        case X86_OTP_MOFFS1632:
+            if (oprsize == AOS_UNDEFINED) oprsize = va_arg(ap, AsmOperandSize);
+            op2 = x86_create_moffs1632_operand(data, &op2_pos, len, oprsize == AOS_32_BITS);
+            break;
+
+        case X86_OTP_R8:
+            op2 = x86_create_r8_operand(data[op2_pos++], op2_first);
+            break;
+
+        case X86_OTP_R1632:
+            if (oprsize == AOS_UNDEFINED) oprsize = va_arg(ap, AsmOperandSize);
+            op2 = x86_create_r1632_operand(data[op2_pos++], oprsize == AOS_32_BITS, op2_first);
+            break;
+
+        case X86_OTP_RM8:
+            op2 = x86_create_rm8_operand(data, &op2_pos, len);
+            break;
+
+        case X86_OTP_RM1632:
+            if (oprsize == AOS_UNDEFINED) oprsize = va_arg(ap, AsmOperandSize);
+            op2 = x86_create_rm1632_operand(data, &op2_pos, len, oprsize == AOS_32_BITS);
+            break;
+
+        case X86_OTP_AL:
+            op2 = x86_create_r8_operand(0x00, op2_first);
+            break;
+
+        case X86_OTP_E_AX:
+            if (oprsize == AOS_UNDEFINED) oprsize = va_arg(ap, AsmOperandSize);
+            op2 = x86_create_r1632_operand(0x00, oprsize == AOS_32_BITS, op2_first);
+            break;
+
+    }
+
+    if (op2 == NULL)
+    {
+        free(op1);
+        va_end(ap);
+        return false;
+    }
+
+    va_end(ap);
+
+    /* Assemblage final */
+
+    *pos = MAX(op1_pos, op2_pos);
+
+    ASM_INSTRUCTION(instr)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
+    ASM_INSTRUCTION(instr)->operands_count = 2;
+
+    ASM_INSTRUCTION(instr)->operands[0] = ASM_OPERAND(op1);
+    ASM_INSTRUCTION(instr)->operands[1] = ASM_OPERAND(op2);
+
+    return true;
+
+}
diff --git a/src/arch/x86/operand.h b/src/arch/x86/operand.h
index 04c0cb6..c48a0be 100644
--- a/src/arch/x86/operand.h
+++ b/src/arch/x86/operand.h
@@ -29,7 +29,8 @@
 #include <stdint.h>
 
 
-#include "../operand.h"     /* TODO : AsmSyntax ? */
+#include "instruction.h"
+
 
 
 /* Définition d'une opérande x86 */
@@ -57,13 +58,13 @@ asm_x86_operand *x86_create_content1632_operand(const uint8_t *, off_t *, off_t,
 asm_x86_operand *x86_create_r8_operand(uint8_t, bool);
 
 /* Crée une opérande à partir d'un registre/une mémoire 8 bits. */
-asm_x86_operand *x86_create_rm8_operand(const uint8_t *, off_t *, off_t, bool);
+asm_x86_operand *x86_create_rm8_operand(const uint8_t *, off_t *, off_t, ...);
 
 /* Crée une opérande renvoyant vers un registre 16 ou 32 bits. */
 asm_x86_operand *x86_create_r1632_operand(uint8_t, bool, bool);
 
 /* Crée une opérande à partir d'un registre/une mémoire 16/32b. */
-asm_x86_operand *x86_create_rm1632_operand(const uint8_t *, off_t *, off_t, bool, bool);
+asm_x86_operand *x86_create_rm1632_operand(const uint8_t *, off_t *, off_t, bool, ...);
 
 
 
@@ -92,6 +93,53 @@ void x86_print_moffs_operand(const asm_x86_operand *, char *, size_t, AsmSyntax)
 /* Crée une opérande à partir d'une adresse relative (8 bits). */
 asm_x86_operand *x86_create_rel8_operand_in_32b(uint64_t, const uint8_t *, off_t *, off_t);
 
+/* Crée une opérande à partir d'une adresse relative (16/32b). */
+asm_x86_operand *x86_create_rel1632_operand_in_32b(uint64_t, const uint8_t *, off_t *, off_t, bool);
+
+
+
+/* ------------------------- AIDE A LA CREATION D'OPERANDES ------------------------- */
+
+
+/* Construction d'identifiants typés */
+
+#define X86_OTP_IMM_TYPE    0x8000
+#define X86_OTP_REG_TYPE    0x4000
+#define X86_OTP_RM_TYPE     0x2000
+
+#define X86_OTP_IMM(b)  X86_OTP_IMM_TYPE | (1 << b)
+#define X86_OTP_REG(b)  X86_OTP_REG_TYPE | (1 << b)
+#define X86_OTP_RM(b)   X86_OTP_RM_TYPE  | (1 << b)
+
+/* Types d'opérandes supportés */
+typedef enum _X86OperandType
+{
+    X86_OTP_IMM8        = X86_OTP_IMM(1),   /* Valeur immédiate sur 8 bits */
+    X86_OTP_IMM1632     = X86_OTP_IMM(2),   /* Valeur immédiate sur 16/32b */
+    X86_OTP_MOFFS8      = X86_OTP_IMM(3),   /* Décallage immédiat 8 bits   */
+    X86_OTP_MOFFS1632   = X86_OTP_IMM(4),   /* Décallage immédiat 16/32b   */
+    X86_OTP_REL8        = X86_OTP_IMM(5),   /* Adresse relative 8 bits     */
+    X86_OTP_REL1632     = X86_OTP_IMM(6),   /* Adresse relative 16/32 bits */
+
+    X86_OTP_R8          = X86_OTP_REG(1),   /* Registre 8 bits             */
+    X86_OTP_R1632       = X86_OTP_REG(2),   /* Registre 16 ou 32 bits      */
+    X86_OTP_OP_R1632    = X86_OTP_REG(3),   /* Registre 16 ou 32 bits      */
+
+    X86_OTP_RM8         = X86_OTP_RM(1),    /* Registre 8 bits ou mémoire  */
+    X86_OTP_RM1632      = X86_OTP_RM(2),    /* Registre 16/32b ou mémoire  */
+
+    X86_OTP_AL          = 0x0ffe,           /* Registre al                 */
+    X86_OTP_E_AX        = 0x0fff            /* Registre eax ou ax          */
+
+} X86OperandType;
+
+
+/* Procède à la lecture d'un opérande donné. */
+bool x86_read_one_operand(asm_x86_instr *, const uint8_t *, off_t *, off_t, X86OperandType, ...);
+
+/* Procède à la lecture de deux opérandes donnés. */
+bool x86_read_two_operands(asm_x86_instr *, const uint8_t *, off_t *, off_t, X86OperandType, X86OperandType, ...);
+
 
 
 #endif  /* _ARCH_X86_OPERAND_H */
diff --git a/src/arch/x86/processor.c b/src/arch/x86/processor.c
index 5b93e0a..0b81a8c 100644
--- a/src/arch/x86/processor.c
+++ b/src/arch/x86/processor.c
@@ -164,6 +164,8 @@ AsmOperandSize get_x86_current_operand_size(const asm_x86_processor *proc)
 /******************************************************************************
 *                                                                             *
 *  Paramètres  : proc = architecture visée par la consultation.               *
+*                data = flux de données à analyser.                           *
+*                pos  = position courante dans ce flux. [OUT]                 *
 *                                                                             *
 *  Description : Fournit la taille supplantée des opérandes pour x86.         *
 *                                                                             *
@@ -173,9 +175,18 @@ AsmOperandSize get_x86_current_operand_size(const asm_x86_processor *proc)
 *                                                                             *
 ******************************************************************************/
 
-AsmOperandSize switch_x86_operand_size(const asm_x86_processor *proc)
+AsmOperandSize switch_x86_operand_size_if_needed(const asm_x86_processor *proc, const uint8_t *data, off_t *pos)
 {
-    return (proc->operand_size == AOS_32_BITS ? AOS_16_BITS : AOS_32_BITS);
+    AsmOperandSize result;                  /* Taille à renvoyer           */
+
+    if (data[*pos] == 0x66)
+    {
+        result = (proc->operand_size == AOS_32_BITS ? AOS_16_BITS : AOS_32_BITS);
+        (*pos)++;
+    }
+    else result = proc->operand_size;
+
+    return result;
 
 }
 
@@ -194,72 +205,80 @@ AsmOperandSize switch_x86_operand_size(const asm_x86_processor *proc)
 
 void x86_register_instructions(asm_x86_processor *proc)
 {
-    register_opcode(proc->opcodes[X86_OP_SUB_R1632_RM1632], 0x66, 0x29, "sub", x86_read_instr_sub_r1632_to_rm1632);
+    register_opcode(proc->opcodes[X86_OP_SUB_R1632_RM1632], 0x66, 0x29, "sub", x86_read_instr_sub_r1632_from_rm1632);
 
-    register_opcode(proc->opcodes[X86_OP_XOR_REG1632], 0x00/*0x66*/, 0x31, "xor", x86_read_instr_xor_with_reg1632);
+    register_opcode(proc->opcodes[X86_OP_XOR_RM8_R8], 0x00, 0x30, "xor", x86_read_instr_xor_rm8_with_r8);
+    register_opcode(proc->opcodes[X86_OP_XOR_RM1632_R1632], 0x66, 0x31, "xor", x86_read_instr_xor_rm1632_with_r1632);
+    register_opcode(proc->opcodes[X86_OP_XOR_R8_RM8], 0x00, 0x32, "xor", x86_read_instr_xor_r8_with_rm8);
+    register_opcode(proc->opcodes[X86_OP_XOR_R1632_RM1632], 0x66, 0x33, "xor", x86_read_instr_xor_r1632_with_rm1632);
+    register_opcode(proc->opcodes[X86_OP_XOR_AL_IMM8], 0x00, 0x34, "xor", x86_read_instr_xor_al_with_imm8);
+    register_opcode(proc->opcodes[X86_OP_XOR_E_AX_IMM1632], 0x66, 0x35, "xor", x86_read_instr_xor_e_ax_with_imm1632);
 
     register_opcode(proc->opcodes[X86_OP_CMP_RM1632_R1632], 0x66, 0x39, "cmp", x86_read_instr_cmp_rm1632_with_r1632);
 
-    register_opcode(proc->opcodes[X86_OP_INC_E_AX], 0x66, 0x40, "inc", x86_read_instr_inc_1632);
-    register_opcode(proc->opcodes[X86_OP_INC_E_CX], 0x66, 0x41, "inc", x86_read_instr_inc_1632);
-    register_opcode(proc->opcodes[X86_OP_INC_E_DX], 0x66, 0x42, "inc", x86_read_instr_inc_1632);
-    register_opcode(proc->opcodes[X86_OP_INC_E_BX], 0x66, 0x43, "inc", x86_read_instr_inc_1632);
-    register_opcode(proc->opcodes[X86_OP_INC_E_SP], 0x66, 0x44, "inc", x86_read_instr_inc_1632);
-    register_opcode(proc->opcodes[X86_OP_INC_E_BP], 0x66, 0x45, "inc", x86_read_instr_inc_1632);
-    register_opcode(proc->opcodes[X86_OP_INC_E_SI], 0x66, 0x46, "inc", x86_read_instr_inc_1632);
-    register_opcode(proc->opcodes[X86_OP_INC_E_DI], 0x66, 0x47, "inc", x86_read_instr_inc_1632);
-
-    register_opcode(proc->opcodes[X86_OP_DEC_E_AX], 0x66, 0x48, "dec", x86_read_instr_dec_1632);
-    register_opcode(proc->opcodes[X86_OP_DEC_E_CX], 0x66, 0x49, "dec", x86_read_instr_dec_1632);
-    register_opcode(proc->opcodes[X86_OP_DEC_E_DX], 0x66, 0x4a, "dec", x86_read_instr_dec_1632);
-    register_opcode(proc->opcodes[X86_OP_DEC_E_BX], 0x66, 0x4b, "dec", x86_read_instr_dec_1632);
-    register_opcode(proc->opcodes[X86_OP_DEC_E_SP], 0x66, 0x4c, "dec", x86_read_instr_dec_1632);
-    register_opcode(proc->opcodes[X86_OP_DEC_E_BP], 0x66, 0x4d, "dec", x86_read_instr_dec_1632);
-    register_opcode(proc->opcodes[X86_OP_DEC_E_SI], 0x66, 0x4e, "dec", x86_read_instr_dec_1632);
-    register_opcode(proc->opcodes[X86_OP_DEC_E_DI], 0x66, 0x4f, "dec", x86_read_instr_dec_1632);
-
-    register_opcode(proc->opcodes[X86_OP_PUSH_E_AX], 0x66, 0x50, "push", x86_read_instr_push_reg1632);
-    register_opcode(proc->opcodes[X86_OP_PUSH_E_CX], 0x66, 0x51, "push", x86_read_instr_push_reg1632);
-    register_opcode(proc->opcodes[X86_OP_PUSH_E_DX], 0x66, 0x52, "push", x86_read_instr_push_reg1632);
-    register_opcode(proc->opcodes[X86_OP_PUSH_E_BX], 0x66, 0x53, "push", x86_read_instr_push_reg1632);
-    register_opcode(proc->opcodes[X86_OP_PUSH_E_SP], 0x66, 0x54, "push", x86_read_instr_push_reg1632);
-    register_opcode(proc->opcodes[X86_OP_PUSH_E_BP], 0x66, 0x55, "push", x86_read_instr_push_reg1632);
-    register_opcode(proc->opcodes[X86_OP_PUSH_E_SI], 0x66, 0x56, "push", x86_read_instr_push_reg1632);
-    register_opcode(proc->opcodes[X86_OP_PUSH_E_DI], 0x66, 0x57, "push", x86_read_instr_push_reg1632);
-
-    register_opcode(proc->opcodes[X86_OP_POP_E_AX], 0x66, 0x58, "pop", x86_read_instr_pop_reg1632);
-    register_opcode(proc->opcodes[X86_OP_POP_E_CX], 0x66, 0x59, "pop", x86_read_instr_pop_reg1632);
-    register_opcode(proc->opcodes[X86_OP_POP_E_DX], 0x66, 0x5a, "pop", x86_read_instr_pop_reg1632);
-    register_opcode(proc->opcodes[X86_OP_POP_E_BX], 0x66, 0x5b, "pop", x86_read_instr_pop_reg1632);
-    register_opcode(proc->opcodes[X86_OP_POP_E_SP], 0x66, 0x5c, "pop", x86_read_instr_pop_reg1632);
-    register_opcode(proc->opcodes[X86_OP_POP_E_BP], 0x66, 0x5d, "pop", x86_read_instr_pop_reg1632);
-    register_opcode(proc->opcodes[X86_OP_POP_E_SI], 0x66, 0x5e, "pop", x86_read_instr_pop_reg1632);
-    register_opcode(proc->opcodes[X86_OP_POP_E_DI], 0x66, 0x5f, "pop", x86_read_instr_pop_reg1632);
+    register_opcode(proc->opcodes[X86_OP_INC_E_AX], 0x66, 0x40, "inc", x86_read_instr_inc_r1632);
+    register_opcode(proc->opcodes[X86_OP_INC_E_CX], 0x66, 0x41, "inc", x86_read_instr_inc_r1632);
+    register_opcode(proc->opcodes[X86_OP_INC_E_DX], 0x66, 0x42, "inc", x86_read_instr_inc_r1632);
+    register_opcode(proc->opcodes[X86_OP_INC_E_BX], 0x66, 0x43, "inc", x86_read_instr_inc_r1632);
+    register_opcode(proc->opcodes[X86_OP_INC_E_SP], 0x66, 0x44, "inc", x86_read_instr_inc_r1632);
+    register_opcode(proc->opcodes[X86_OP_INC_E_BP], 0x66, 0x45, "inc", x86_read_instr_inc_r1632);
+    register_opcode(proc->opcodes[X86_OP_INC_E_SI], 0x66, 0x46, "inc", x86_read_instr_inc_r1632);
+    register_opcode(proc->opcodes[X86_OP_INC_E_DI], 0x66, 0x47, "inc", x86_read_instr_inc_r1632);
+
+    register_opcode(proc->opcodes[X86_OP_DEC_E_AX], 0x66, 0x48, "dec", x86_read_instr_dec_r1632);
+    register_opcode(proc->opcodes[X86_OP_DEC_E_CX], 0x66, 0x49, "dec", x86_read_instr_dec_r1632);
+    register_opcode(proc->opcodes[X86_OP_DEC_E_DX], 0x66, 0x4a, "dec", x86_read_instr_dec_r1632);
+    register_opcode(proc->opcodes[X86_OP_DEC_E_BX], 0x66, 0x4b, "dec", x86_read_instr_dec_r1632);
+    register_opcode(proc->opcodes[X86_OP_DEC_E_SP], 0x66, 0x4c, "dec", x86_read_instr_dec_r1632);
+    register_opcode(proc->opcodes[X86_OP_DEC_E_BP], 0x66, 0x4d, "dec", x86_read_instr_dec_r1632);
+    register_opcode(proc->opcodes[X86_OP_DEC_E_SI], 0x66, 0x4e, "dec", x86_read_instr_dec_r1632);
+    register_opcode(proc->opcodes[X86_OP_DEC_E_DI], 0x66, 0x4f, "dec", x86_read_instr_dec_r1632);
+
+    register_opcode(proc->opcodes[X86_OP_PUSH_E_AX], 0x66, 0x50, "push", x86_read_instr_push_r1632);
+    register_opcode(proc->opcodes[X86_OP_PUSH_E_CX], 0x66, 0x51, "push", x86_read_instr_push_r1632);
+    register_opcode(proc->opcodes[X86_OP_PUSH_E_DX], 0x66, 0x52, "push", x86_read_instr_push_r1632);
+    register_opcode(proc->opcodes[X86_OP_PUSH_E_BX], 0x66, 0x53, "push", x86_read_instr_push_r1632);
+    register_opcode(proc->opcodes[X86_OP_PUSH_E_SP], 0x66, 0x54, "push", x86_read_instr_push_r1632);
+    register_opcode(proc->opcodes[X86_OP_PUSH_E_BP], 0x66, 0x55, "push", x86_read_instr_push_r1632);
+    register_opcode(proc->opcodes[X86_OP_PUSH_E_SI], 0x66, 0x56, "push", x86_read_instr_push_r1632);
+    register_opcode(proc->opcodes[X86_OP_PUSH_E_DI], 0x66, 0x57, "push", x86_read_instr_push_r1632);
+
+    register_opcode(proc->opcodes[X86_OP_POP_E_AX], 0x66, 0x58, "pop", x86_read_instr_pop_r1632);
+    register_opcode(proc->opcodes[X86_OP_POP_E_CX], 0x66, 0x59, "pop", x86_read_instr_pop_r1632);
+    register_opcode(proc->opcodes[X86_OP_POP_E_DX], 0x66, 0x5a, "pop", x86_read_instr_pop_r1632);
+    register_opcode(proc->opcodes[X86_OP_POP_E_BX], 0x66, 0x5b, "pop", x86_read_instr_pop_r1632);
+    register_opcode(proc->opcodes[X86_OP_POP_E_SP], 0x66, 0x5c, "pop", x86_read_instr_pop_r1632);
+    register_opcode(proc->opcodes[X86_OP_POP_E_BP], 0x66, 0x5d, "pop", x86_read_instr_pop_r1632);
+    register_opcode(proc->opcodes[X86_OP_POP_E_SI], 0x66, 0x5e, "pop", x86_read_instr_pop_r1632);
+    register_opcode(proc->opcodes[X86_OP_POP_E_DI], 0x66, 0x5f, "pop", x86_read_instr_pop_r1632);
 
     register_opcode(proc->opcodes[X86_OP_PUSH_IMM1632], 0x66, 0x68, "push", x86_read_instr_push_imm1632);
 
+    register_opcode_with_ext(proc->opcodes[X86_OP_XOR_RM8_IMM8], 0x00, 0x80, 6, "xor", x86_read_instr_xor_rm8_with_imm8);
     register_opcode_with_ext(proc->opcodes[X86_OP_CMP_RM8_IMM8], 0x00, 0x80, 7, "cmp", x86_read_instr_cmp_rm8_with_imm8);
 
-    register_opcode_with_ext(proc->opcodes[X86_OP_ADD_IMM1632_REG1632], 0x66, 0x81, 0, "add", x86_read_instr_add_imm1632_to_rm1632);
+    register_opcode_with_ext(proc->opcodes[X86_OP_ADD_RM1632_IMM1632], 0x66, 0x81, 0, "add", x86_read_instr_add_imm1632_to_rm1632);
+
+    register_opcode_with_ext(proc->opcodes[X86_OP_XOR_RM1632_IMM1632], 0x66, 0x81, 6, "xor", x86_read_instr_xor_rm1632_with_imm1632);
 
-    register_opcode_with_ext(proc->opcodes[X86_OP_ADD8_REG1632], 0x66, 0x83, 0, "add", x86_read_instr_add8_with_reg1632);
-    register_opcode_with_ext(proc->opcodes[X86_OP_OR8_REG1632], 0x66, 0x83, 1, "or", x86_read_instr_or8_with_reg1632);
-    register_opcode_with_ext(proc->opcodes[X86_OP_ADC8_REG1632], 0x66, 0x83, 2, "adc", x86_read_instr_adc8_with_reg1632);
-    register_opcode_with_ext(proc->opcodes[X86_OP_SBB8_REG1632], 0x66, 0x83, 3, "sbb", x86_read_instr_sbb8_with_reg1632);
-    register_opcode_with_ext(proc->opcodes[X86_OP_AND8_REG1632], 0x66, 0x83, 4, "and", x86_read_instr_and8_with_reg1632);
-    register_opcode_with_ext(proc->opcodes[X86_OP_SUB8_REG1632], 0x66, 0x83, 5, "sub", x86_read_instr_sub8_with_reg1632);
-    register_opcode_with_ext(proc->opcodes[X86_OP_XOR8_REG1632], 0x66, 0x83, 6, "xor", x86_read_instr_xor8_with_reg1632);
+    register_opcode_with_ext(proc->opcodes[X86_OP_ADD_RM1632_IMM8], 0x66, 0x83, 0, "add", x86_read_instr_add_imm8_to_rm1632);
+    register_opcode_with_ext(proc->opcodes[X86_OP_OR_RM1632_IMM8], 0x66, 0x83, 1, "or", x86_read_instr_or_rm1632_with_imm8);
+    register_opcode_with_ext(proc->opcodes[X86_OP_ADC_RM1632_IMM8], 0x66, 0x83, 2, "adc", x86_read_instr_adc_imm8_to_rm1632);
+    register_opcode_with_ext(proc->opcodes[X86_OP_SBB_RM1632_IMM8], 0x66, 0x83, 3, "sbb", x86_read_instr_sbb_rm1632_with_imm8);
+    register_opcode_with_ext(proc->opcodes[X86_OP_AND_RM1632_IMM8], 0x66, 0x83, 4, "and", x86_read_instr_and_rm1632_with_imm8);
+    register_opcode_with_ext(proc->opcodes[X86_OP_SUB_RM1632_IMM8], 0x66, 0x83, 5, "sub", x86_read_instr_sub_imm8_from_rm1632);
+    register_opcode_with_ext(proc->opcodes[X86_OP_XOR_RM1632_IMM8], 0x66, 0x83, 6, "xor", x86_read_instr_xor_rm1632_with_imm8);
     register_opcode_with_ext(proc->opcodes[X86_OP_CMP_RM1632_IMM8], 0x66, 0x83, 7, "cmp", x86_read_instr_cmp_rm1632_with_imm8);
 
     register_opcode(proc->opcodes[X86_OP_JE_8], 0x00, 0x74, "je", x86_read_instr_je_8);
     register_opcode(proc->opcodes[X86_OP_JNE_8], 0x00, 0x75, "jne", x86_read_instr_jne_8);
 
-    register_opcode(proc->opcodes[X86_OP_TEST_RM8], 0x00, 0x84, "test", x86_read_instr_test_rm8);
-    register_opcode(proc->opcodes[X86_OP_TEST_RM1632], 0x66, 0x85, "test", x86_read_instr_test_rm1632);
+    register_opcode(proc->opcodes[X86_OP_TEST_RM8_R8], 0x00, 0x84, "test", x86_read_instr_test_rm8_with_r8);
+    register_opcode(proc->opcodes[X86_OP_TEST_RM1632_R1632], 0x66, 0x85, "test", x86_read_instr_test_rm1632_with_r1632);
 
-    register_opcode(proc->opcodes[X86_OP_MOV_REG1632], 0x66, 0x89, "mov", x86_read_instr_mov_with_reg1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_RM1632_R1632], 0x66, 0x89, "mov", x86_read_instr_mov_r1632_to_rm1632);
 
-    register_opcode(proc->opcodes[X86_OP_MOV_FROM_CONTENT1632], 0x66, 0x8b, "mov", x86_read_instr_mov_from_content_1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_R1632_RM1632], 0x66, 0x8b, "mov", x86_read_instr_mov_rm1632_to_r1632);
 
     register_opcode(proc->opcodes[X86_OP_LEA], 0x66, 0x8d, "lea", x86_read_instr_lea);
 
@@ -273,35 +292,35 @@ void x86_register_instructions(asm_x86_processor *proc)
     register_opcode(proc->opcodes[X86_OP_TEST_AL], 0x00, 0xa8, "test", x86_read_instr_test_al);
     register_opcode(proc->opcodes[X86_OP_TEST_E_AX], 0x66, 0xa9, "test", x86_read_instr_test_e_ax);
 
-    register_opcode(proc->opcodes[X86_OP_MOV_E_AX], 0x66, 0xb8, "mov", x86_read_instr_mov_to_1632);
-    register_opcode(proc->opcodes[X86_OP_MOV_E_CX], 0x66, 0xb9, "mov", x86_read_instr_mov_to_1632);
-    register_opcode(proc->opcodes[X86_OP_MOV_E_DX], 0x66, 0xba, "mov", x86_read_instr_mov_to_1632);
-    register_opcode(proc->opcodes[X86_OP_MOV_E_BX], 0x66, 0xbb, "mov", x86_read_instr_mov_to_1632);
-    register_opcode(proc->opcodes[X86_OP_MOV_E_SP], 0x66, 0xbc, "mov", x86_read_instr_mov_to_1632);
-    register_opcode(proc->opcodes[X86_OP_MOV_E_BP], 0x66, 0xbd, "mov", x86_read_instr_mov_to_1632);
-    register_opcode(proc->opcodes[X86_OP_MOV_E_SI], 0x66, 0xbe, "mov", x86_read_instr_mov_to_1632);
-    register_opcode(proc->opcodes[X86_OP_MOV_E_DI], 0x66, 0xbf, "mov", x86_read_instr_mov_to_1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_E_AX], 0x66, 0xb8, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_E_CX], 0x66, 0xb9, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_E_DX], 0x66, 0xba, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_E_BX], 0x66, 0xbb, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_E_SP], 0x66, 0xbc, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_E_BP], 0x66, 0xbd, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_E_SI], 0x66, 0xbe, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_E_DI], 0x66, 0xbf, "mov", x86_read_instr_mov_imm1632_to_r1632);
 
     register_opcode_with_ext(proc->opcodes[X86_OP_SAR_RM1632_IMM8], 0x66, 0xc1, 7, "sar", x86_read_instr_sar_rm1632_with_imm8);
 
     register_opcode(proc->opcodes[X86_OP_RET], 0x00, 0xc3, "ret", x86_read_instr_ret);
 
     register_opcode(proc->opcodes[X86_OP_MOV_IMM8_TO_RM8], 0x00, 0xc6, "mov", x86_read_instr_mov_imm8_to_rm8);
-    register_opcode(proc->opcodes[X86_OP_MOV_TO_CONTENT1632], 0x66, 0xc7, "mov", x86_read_instr_mov_to_content_1632);
+    register_opcode(proc->opcodes[X86_OP_MOV_IMM1632_TO_RM1632], 0x66, 0xc7, "mov", x86_read_instr_mov_imm1632_to_rm1632);
 
     register_opcode(proc->opcodes[X86_OP_LEAVE], 0x00, 0xc9, "leave", x86_read_instr_leave);
 
     register_opcode(proc->opcodes[X86_OP_INT], 0x00, 0xcd, "int", x86_read_instr_int);
 
 
-    register_opcode(proc->opcodes[X86_OP_CALL], 0x00, 0xe8, "call", x86_read_instr_call);
+    register_opcode(proc->opcodes[X86_OP_CALL_REL1632], 0x66, 0xe8, "call", x86_read_instr_call_rel1632);
 
     register_opcode(proc->opcodes[X86_OP_JMP_8], 0x00, 0xeb, "jmp", x86_read_instr_jmp_8);
 
     register_opcode(proc->opcodes[X86_OP_HLT], 0x00, 0xf4, "hlt", x86_read_instr_hlt);
 
     register_opcode_with_ext(proc->opcodes[X86_OP_CALL_RM1632], 0x66, 0xff, 2, "call", x86_read_instr_call_rm1632);
-    register_opcode_with_ext(proc->opcodes[X86_OP_PUSH_CONTENT], 0x66, 0xff, 6, "push", x86_read_instr_push_content);
+    register_opcode_with_ext(proc->opcodes[X86_OP_PUSH_RM1632], 0x66, 0xff, 6, "push", x86_read_instr_push_rm1632);
 
 
 }
diff --git a/src/arch/x86/processor.h b/src/arch/x86/processor.h
index c898d80..036966f 100644
--- a/src/arch/x86/processor.h
+++ b/src/arch/x86/processor.h
@@ -41,8 +41,7 @@ asm_processor *create_x86_processor(void);
 AsmOperandSize get_x86_current_operand_size(const asm_x86_processor *);
 
 /* Fournit la taille supplantée des opérandes pour x86. */
-AsmOperandSize switch_x86_operand_size(const asm_x86_processor *);
-
+AsmOperandSize switch_x86_operand_size_if_needed(const asm_x86_processor *, const uint8_t *, off_t *);