Completed support of the 0x81 and 0xc1 opcodes.

git-svn-id: svn://svn.gna.org/svn/chrysalide/trunk@37 abbe820e-26c8-41b2-8c08-b7b2b41f8b0a

22 files changed, 1063 insertions, 193 deletions

diff --git a/ChangeLog b/ChangeLog
index 701100a..c251af9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,51 @@
+2008-10-27  Cyrille Bagard <nocbos@gmail.com>
+
+	* src/arch/processor.c:
+	Take care here of decoding failures.
+
+	* src/arch/x86/instruction.h:
+	Register some new instructions.
+
+	* src/arch/x86/Makefile.am:
+	Add op_movzx.c, op_rcl.c, op_rcr.c, op_rol.c, op_ror.c, op_shl.c and
+	op_shr.c to libarchx86_a_SOURCES.
+
+	* src/arch/x86/op_adc.c:
+	* src/arch/x86/op_add.c:
+	* src/arch/x86/op_and.c:
+	* src/arch/x86/op_cmp.c:
+	Complete support of the 0x81 and 0xc1 opcodes.
+
+	* src/arch/x86/opcodes.h:
+	Register some new instructions.
+
+	* src/arch/x86/op_movzx.c:
+	First attempt to handle a two-byte instruction.
+
+	* src/arch/x86/op_or.c:
+	Complete support of the 0x81 and 0xc1 opcodes.
+
+	* src/arch/x86/op_rcl.c:
+	* src/arch/x86/op_rcr.c:
+	* src/arch/x86/op_rol.c:
+	* src/arch/x86/op_ror.c:
+	New entries: complete support of the 0x81 and 0xc1 opcodes.
+
+	* src/arch/x86/op_sar.c:
+	* src/arch/x86/op_sbb.c:
+	Complete support of the 0x81 and 0xc1 opcodes.
+
+	* src/arch/x86/op_shl.c:
+	* src/arch/x86/op_shr.c:
+	New entries: complete support of the 0x81 and 0xc1 opcodes.
+
+	* src/arch/x86/op_sub.c:
+	* src/arch/x86/op_xor.c:
+	Complete support of the 0x81 and 0xc1 opcodes.
+
+	* src/arch/x86/processor.c:
+	Better handle prefixes. Complete support of the 0x81 and 0xc1 opcodes.
+
 2008-10-21  Cyrille Bagard <nocbos@gmail.com>
 
 	* src/arch/x86/processor.c:
diff --git a/src/arch/processor.c b/src/arch/processor.c
index fc9f773..1afb576 100644
--- a/src/arch/processor.c
+++ b/src/arch/processor.c
@@ -52,8 +52,11 @@ asm_instr *decode_instruction(const asm_processor *proc, const uint8_t *data, of
 {
     asm_instr *result;                      /* Représentation à renvoyer   */
 
+    off_t old_pos;                          /* Sauvegarde de la position   */
 
 
+    old_pos = *pos;
+
 
     result = proc->fetch_instr(proc, data, pos, len, offset);
 
@@ -63,6 +66,8 @@ asm_instr *decode_instruction(const asm_processor *proc, const uint8_t *data, of
 
     if (result == NULL)
     {
+        *pos = old_pos;
+
         printf("err while decoding opcode 0x%0hhx at 0x%08llx\n", data[*pos], offset);
         result = create_db_instruction(data, pos, len);
     }
diff --git a/src/arch/x86/Makefile.am b/src/arch/x86/Makefile.am
index 139bcde..58ffaa8 100644
--- a/src/arch/x86/Makefile.am
+++ b/src/arch/x86/Makefile.am
@@ -17,12 +17,19 @@ libarchx86_a_SOURCES =					\
 	op_leave.c							\
 	op_nop.c							\
 	op_mov.c							\
+	op_movzx.c							\
 	op_or.c								\
 	op_pop.c							\
 	op_push.c							\
+	op_rcl.c							\
+	op_rcr.c							\
 	op_ret.c							\
+	op_rol.c							\
+	op_ror.c							\
 	op_sar.c							\
 	op_sbb.c							\
+	op_shl.c							\
+	op_shr.c							\
 	op_sub.c							\
 	op_test.c							\
 	op_xor.c							\
diff --git a/src/arch/x86/instruction.h b/src/arch/x86/instruction.h
index baf911d..1c97255 100644
--- a/src/arch/x86/instruction.h
+++ b/src/arch/x86/instruction.h
@@ -92,11 +92,17 @@ 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_XOR_RM8_IMM8,                    /* xor (0x80 6)                */
     X86_OP_CMP_RM8_IMM8,                    /* cmp (0x80 7)                */
 
-    X86_OP_ADD_RM1632_IMM1632,             /* add ([0x66] 0x81 0)         */
+    X86_OP_ADD_RM1632_IMM1632,              /* add ([0x66] 0x81 0)         */
+    X86_OP_OR_RM1632_IMM1632,               /* or ([0x66] 0x81 1)          */
+    X86_OP_ADC_RM1632_IMM1632,              /* adc ([0x66] 0x81 2)         */
+    X86_OP_SBB_RM1632_IMM1632,              /* sbb ([0x66] 0x81 3)         */
+    X86_OP_AND_RM1632_IMM1632,              /* and ([0x66] 0x81 4)         */
+    X86_OP_SUB_RM1632_IMM1632,              /* sub ([0x66] 0x81 5)         */
     X86_OP_XOR_RM1632_IMM1632,              /* xor ([0x66] 0x81 6)         */
+    X86_OP_CMP_RM1632_IMM1632,              /* xor ([0x66] 0x81 7)         */
 
     X86_OP_ADD_RM1632_IMM8,                 /* add ([0x66] 0x83 0)         */
     X86_OP_OR_RM1632_IMM8,                  /* or ([0x66] 0x83 1)          */
@@ -135,6 +141,13 @@ typedef enum _X86Opcodes
     X86_OP_MOV_E_SI,                        /* mov ([0x66] 0xbe)           */
     X86_OP_MOV_E_DI,                        /* mov ([0x66] 0xbf)           */
 
+    X86_OP_ROL_RM1632_IMM8,                 /* rol ([0x66 0xc1 0)          */
+    X86_OP_ROR_RM1632_IMM8,                 /* ror ([0x66 0xc1 1)          */
+    X86_OP_RCL_RM1632_IMM8,                 /* rcl ([0x66 0xc1 2)          */
+    X86_OP_RCR_RM1632_IMM8,                 /* rcr ([0x66 0xc1 3)          */
+    X86_OP_SHL_RM1632_IMM8,                 /* shl ([0x66 0xc1 4)          */
+    X86_OP_SHR_RM1632_IMM8,                 /* shr ([0x66 0xc1 5)          */
+    X86_OP_SAL_RM1632_IMM8,                 /* sal ([0x66 0xc1 6)          */
     X86_OP_SAR_RM1632_IMM8,                 /* sar ([0x66 0xc1 7)          */
 
     X86_OP_RET,                             /* ret (0xc3)                  */
@@ -157,6 +170,8 @@ typedef enum _X86Opcodes
     X86_OP_JMP_RM1632,                      /* jmp ([0x66] 0xff 4)         */
     X86_OP_PUSH_RM1632,                     /* push ([0x66] 0xff 6)        */
 
+    X86_OP_MOVZX_R1632_RM8,                 /* movzx ([0x66] 0x0f 0xb6)    */
+
     X86_OP_COUNT
 
 } X86Opcodes;
@@ -167,11 +182,16 @@ typedef enum _X86Opcodes
 /* Eventuel préfixe rencontré */
 typedef enum _X86Prefix
 {
-    X86_PRE_NONE = 0,                       /* Aucun préfixe               */
+    X86_PRE_NONE        = (0 << 0),         /* Aucun préfixe               */
+
+
+    /* Groupe 3 */
 
+    X86_PRE_OPSIZE      = (1 << 1),         /* Basculement des opérandes   */
 
-    X86_PRE_OPSIZE                          /* Basculement des opérandes   */
+    /* Autres */
 
+    X86_PRE_ESCAPE      = (1 << 3)          /* Opcode sur deux octets      */
 
 } X86Prefix;
 
diff --git a/src/arch/x86/op_adc.c b/src/arch/x86/op_adc.c
index 8927607..7ac80f3 100644
--- a/src/arch/x86/op_adc.c
+++ b/src/arch/x86/op_adc.c
@@ -66,3 +66,41 @@ asm_x86_instr *x86_read_instr_adc_imm8_to_rm1632(const uint8_t *data, off_t *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 'adc' (16 ou 32 bits).        *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_adc_rm1632_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);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_add.c b/src/arch/x86/op_add.c
index f42c8f9..42e8d3b 100644
--- a/src/arch/x86/op_add.c
+++ b/src/arch/x86/op_add.c
@@ -76,7 +76,7 @@ asm_x86_instr *x86_read_instr_add_imm8_to_rm1632(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 'add' (16 ou 32 bits).        *
+*  Description : Décode une instruction de type 'add' (8 bits).               *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -84,18 +84,15 @@ asm_x86_instr *x86_read_instr_add_imm8_to_rm1632(const uint8_t *data, off_t *pos
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_add_imm1632_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_add_rm8_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     */
-    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))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM8, X86_OTP_R8))
     {
         free(result);
         return NULL;
@@ -114,7 +111,7 @@ asm_x86_instr *x86_read_instr_add_imm1632_to_rm1632(const uint8_t *data, off_t *
 *                offset = adresse virtuelle de l'instruction.                 *
 *                proc   = architecture ciblée par le désassemblage.           *
 *                                                                             *
-*  Description : Décode une instruction de type 'add' (8 bits).               *
+*  Description : Décode une instruction de type 'add' (16 ou 32 bits).        *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -122,15 +119,18 @@ asm_x86_instr *x86_read_instr_add_imm1632_to_rm1632(const uint8_t *data, off_t *
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_add_rm8_r8(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_rm1632_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_RM8, X86_OTP_R8))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM1632, oprsize))
     {
         free(result);
         return NULL;
diff --git a/src/arch/x86/op_and.c b/src/arch/x86/op_and.c
index 3e3ba26..2d877a6 100644
--- a/src/arch/x86/op_and.c
+++ b/src/arch/x86/op_and.c
@@ -66,3 +66,41 @@ asm_x86_instr *x86_read_instr_and_rm1632_with_imm8(const uint8_t *data, off_t *p
     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 'and' (16 ou 32 bits).        *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_and_rm1632_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);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_cmp.c b/src/arch/x86/op_cmp.c
index 5afd794..95e1347 100644
--- a/src/arch/x86/op_cmp.c
+++ b/src/arch/x86/op_cmp.c
@@ -119,6 +119,44 @@ asm_x86_instr *x86_read_instr_cmp_rm1632_with_imm8(const uint8_t *data, off_t *p
 *                                                                             *
 ******************************************************************************/
 
+asm_x86_instr *x86_read_instr_cmp_rm1632_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);
+        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.               *
+*                offset = adresse virtuelle de l'instruction.                 *
+*                proc   = architecture ciblée par le désassemblage.           *
+*                                                                             *
+*  Description : Décode une instruction de type 'cmp' (16 ou 32 bits).        *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
 asm_x86_instr *x86_read_instr_cmp_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     */
diff --git a/src/arch/x86/op_movzx.c b/src/arch/x86/op_movzx.c
new file mode 100644
index 0000000..bb781cf
--- /dev/null
+++ b/src/arch/x86/op_movzx.c
@@ -0,0 +1,68 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * op_movzx.c - décodage des copies d'opérandes avec mise à zéro
+ *
+ * Copyright (C) 2008 Cyrille Bagard
+ *
+ *  This file is part of OpenIDA.
+ *
+ *  OpenIDA is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  OpenIDA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <malloc.h>
+
+
+#include "../instruction-int.h"
+#include "opcodes.h"
+#include "operand.h"
+
+
+
+/******************************************************************************
+*                                                                             *
+*  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 'movzx' (8 bits).             *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_movzx_r1632_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     */
+    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_R1632, X86_OTP_RM8, oprsize))
+    {
+        free(result);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_or.c b/src/arch/x86/op_or.c
index 0dd7cf3..42fcfe5 100644
--- a/src/arch/x86/op_or.c
+++ b/src/arch/x86/op_or.c
@@ -66,3 +66,41 @@ asm_x86_instr *x86_read_instr_or_rm1632_with_imm8(const uint8_t *data, off_t *po
     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 'or' (16 ou 32 bits).         *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_or_rm1632_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);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_rcl.c b/src/arch/x86/op_rcl.c
new file mode 100644
index 0000000..ab0fd05
--- /dev/null
+++ b/src/arch/x86/op_rcl.c
@@ -0,0 +1,68 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * op_rcl.c - décodage des rotations à gauche avec retenue
+ *
+ * Copyright (C) 2008 Cyrille Bagard
+ *
+ *  This file is part of OpenIDA.
+ *
+ *  OpenIDA is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  OpenIDA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <malloc.h>
+
+
+#include "../instruction-int.h"
+#include "opcodes.h"
+#include "operand.h"
+
+
+
+/******************************************************************************
+*                                                                             *
+*  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 'rcl' (8 bits).               *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_rcl_rm1632_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(result);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_rcr.c b/src/arch/x86/op_rcr.c
new file mode 100644
index 0000000..78807f9
--- /dev/null
+++ b/src/arch/x86/op_rcr.c
@@ -0,0 +1,68 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * op_rcr.c - décodage des rotations à droite avec retenue
+ *
+ * Copyright (C) 2008 Cyrille Bagard
+ *
+ *  This file is part of OpenIDA.
+ *
+ *  OpenIDA is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  OpenIDA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <malloc.h>
+
+
+#include "../instruction-int.h"
+#include "opcodes.h"
+#include "operand.h"
+
+
+
+/******************************************************************************
+*                                                                             *
+*  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 'rcr' (8 bits).               *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_rcr_rm1632_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(result);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_rol.c b/src/arch/x86/op_rol.c
new file mode 100644
index 0000000..047f7cd
--- /dev/null
+++ b/src/arch/x86/op_rol.c
@@ -0,0 +1,68 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * op_rol.c - décodage des rotations à gauche sans retenue
+ *
+ * Copyright (C) 2008 Cyrille Bagard
+ *
+ *  This file is part of OpenIDA.
+ *
+ *  OpenIDA is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  OpenIDA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <malloc.h>
+
+
+#include "../instruction-int.h"
+#include "opcodes.h"
+#include "operand.h"
+
+
+
+/******************************************************************************
+*                                                                             *
+*  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 'rol' (8 bits).               *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_rol_rm1632_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(result);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_ror.c b/src/arch/x86/op_ror.c
new file mode 100644
index 0000000..5dca287
--- /dev/null
+++ b/src/arch/x86/op_ror.c
@@ -0,0 +1,68 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * op_ror.c - décodage des rotations à droite sans retenue
+ *
+ * Copyright (C) 2008 Cyrille Bagard
+ *
+ *  This file is part of OpenIDA.
+ *
+ *  OpenIDA is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  OpenIDA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <malloc.h>
+
+
+#include "../instruction-int.h"
+#include "opcodes.h"
+#include "operand.h"
+
+
+
+/******************************************************************************
+*                                                                             *
+*  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 'ror' (8 bits).               *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_ror_rm1632_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(result);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_sar.c b/src/arch/x86/op_sar.c
index 70b57c9..5e82cd8 100644
--- a/src/arch/x86/op_sar.c
+++ b/src/arch/x86/op_sar.c
@@ -1,6 +1,6 @@
 
 /* OpenIDA - Outil d'analyse de fichiers binaires
- * op_cmp.c - décodage des comparaisons d'opérandes
+ * op_sar.c - décodage des décallages arithmetiques à droite
  *
  * Copyright (C) 2008 Cyrille Bagard
  *
@@ -46,7 +46,7 @@
 *                                                                             *
 ******************************************************************************/
 
-asm_x86_instr *x86_read_instr_sar_rm1632_with_imm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
+asm_x86_instr *x86_read_instr_sar_rm1632_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        */
diff --git a/src/arch/x86/op_sbb.c b/src/arch/x86/op_sbb.c
index eba4e04..20619cc 100644
--- a/src/arch/x86/op_sbb.c
+++ b/src/arch/x86/op_sbb.c
@@ -66,3 +66,41 @@ asm_x86_instr *x86_read_instr_sbb_rm1632_with_imm8(const uint8_t *data, off_t *p
     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 'sbb' (16 ou 32 bits).        *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_sbb_rm1632_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);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_shl.c b/src/arch/x86/op_shl.c
new file mode 100644
index 0000000..4e2bbba
--- /dev/null
+++ b/src/arch/x86/op_shl.c
@@ -0,0 +1,68 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * op_shl.c - décodage des décallages logiques à gauche
+ *
+ * Copyright (C) 2008 Cyrille Bagard
+ *
+ *  This file is part of OpenIDA.
+ *
+ *  OpenIDA is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  OpenIDA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <malloc.h>
+
+
+#include "../instruction-int.h"
+#include "opcodes.h"
+#include "operand.h"
+
+
+
+/******************************************************************************
+*                                                                             *
+*  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 'shl' (8 bits).               *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_shl_rm1632_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(result);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_shr.c b/src/arch/x86/op_shr.c
new file mode 100644
index 0000000..0ba8c4e
--- /dev/null
+++ b/src/arch/x86/op_shr.c
@@ -0,0 +1,68 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * op_shr.c - décodage des décallages logiques à droite
+ *
+ * Copyright (C) 2008 Cyrille Bagard
+ *
+ *  This file is part of OpenIDA.
+ *
+ *  OpenIDA is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  OpenIDA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <malloc.h>
+
+
+#include "../instruction-int.h"
+#include "opcodes.h"
+#include "operand.h"
+
+
+
+/******************************************************************************
+*                                                                             *
+*  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 'shr' (8 bits).               *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_shr_rm1632_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(result);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_sub.c b/src/arch/x86/op_sub.c
index 7c282cc..6978a26 100644
--- a/src/arch/x86/op_sub.c
+++ b/src/arch/x86/op_sub.c
@@ -104,3 +104,41 @@ asm_x86_instr *x86_read_instr_sub_r1632_from_rm1632(const uint8_t *data, off_t *
     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 'sub' (16 ou 32 bits).        *
+*                                                                             *
+*  Retour      : Instruction mise en place ou NULL.                           *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+asm_x86_instr *x86_read_instr_sub_rm1632_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);
+        return NULL;
+    }
+
+    return result;
+
+}
diff --git a/src/arch/x86/op_xor.c b/src/arch/x86/op_xor.c
index 8d44f9c..eabb88e 100644
--- a/src/arch/x86/op_xor.c
+++ b/src/arch/x86/op_xor.c
@@ -149,7 +149,7 @@ asm_x86_instr *x86_read_instr_xor_rm8_with_imm8(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 'xor' (16 ou 32 bits).        *
+*  Description : Décode une instruction de type 'xor' (8 bits).               *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -157,18 +157,15 @@ asm_x86_instr *x86_read_instr_xor_rm8_with_imm8(const uint8_t *data, off_t *pos,
 *                                                                             *
 ******************************************************************************/
 
-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 *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     */
-    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))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_R8, X86_OTP_RM8))
     {
         free(result);
         return NULL;
@@ -187,7 +184,7 @@ asm_x86_instr *x86_read_instr_xor_rm1632_with_imm1632(const uint8_t *data, off_t
 *                offset = adresse virtuelle de l'instruction.                 *
 *                proc   = architecture ciblée par le désassemblage.           *
 *                                                                             *
-*  Description : Décode une instruction de type 'xor' (8 bits).               *
+*  Description : Décode une instruction de type 'xor' (16 ou 32 bits).        *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -195,15 +192,18 @@ asm_x86_instr *x86_read_instr_xor_rm1632_with_imm1632(const uint8_t *data, off_t
 *                                                                             *
 ******************************************************************************/
 
-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 *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        */
 
     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_R8, X86_OTP_RM8))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_R1632, X86_OTP_RM1632, oprsize))
     {
         free(result);
         return NULL;
@@ -222,7 +222,7 @@ asm_x86_instr *x86_read_instr_xor_r8_with_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 'xor' (16 ou 32 bits).        *
+*  Description : Décode une instruction de type 'xor' (8 bits).               *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -230,18 +230,15 @@ asm_x86_instr *x86_read_instr_xor_r8_with_rm8(const uint8_t *data, off_t *pos, o
 *                                                                             *
 ******************************************************************************/
 
-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 *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     */
-    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_R1632, X86_OTP_RM1632, oprsize))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM8, X86_OTP_R8))
     {
         free(result);
         return NULL;
@@ -260,7 +257,7 @@ asm_x86_instr *x86_read_instr_xor_r1632_with_rm1632(const uint8_t *data, off_t *
 *                offset = adresse virtuelle de l'instruction.                 *
 *                proc   = architecture ciblée par le désassemblage.           *
 *                                                                             *
-*  Description : Décode une instruction de type 'xor' (8 bits).               *
+*  Description : Décode une instruction de type 'xor' (16 ou 32 bits).        *
 *                                                                             *
 *  Retour      : Instruction mise en place ou NULL.                           *
 *                                                                             *
@@ -268,15 +265,18 @@ asm_x86_instr *x86_read_instr_xor_r1632_with_rm1632(const uint8_t *data, off_t *
 *                                                                             *
 ******************************************************************************/
 
-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 *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_RM8, X86_OTP_R8))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
     {
         free(result);
         return NULL;
@@ -303,7 +303,7 @@ asm_x86_instr *x86_read_instr_xor_rm8_with_r8(const uint8_t *data, off_t *pos, o
 *                                                                             *
 ******************************************************************************/
 
-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 *x86_read_instr_xor_rm1632_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        */
@@ -314,7 +314,7 @@ asm_x86_instr *x86_read_instr_xor_rm1632_with_imm8(const uint8_t *data, off_t *p
 
     ASM_INSTRUCTION(result)->opcode = data[(*pos)++];
 
-    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM8, oprsize))
+    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_RM1632, X86_OTP_IMM1632, oprsize))
     {
         free(result);
         return NULL;
diff --git a/src/arch/x86/opcodes.h b/src/arch/x86/opcodes.h
index 70d41b8..56f5b2f 100644
--- a/src/arch/x86/opcodes.h
+++ b/src/arch/x86/opcodes.h
@@ -37,11 +37,11 @@
 /* Décode une instruction de type 'adc' (16 ou 32 bits). */
 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_add_imm8_to_rm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+/* Décode une instruction de type 'adc' (16 ou 32 bits). */
+asm_x86_instr *x86_read_instr_adc_rm1632_imm1632(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 *);
+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' (8 bits). */
 asm_x86_instr *x86_read_instr_add_rm8_r8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
@@ -49,6 +49,12 @@ asm_x86_instr *x86_read_instr_add_rm8_r8(const uint8_t *, off_t *, off_t, uint64
 /* Décode une instruction de type 'and' (16 ou 32 bits). */
 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 'and' (16 ou 32 bits). */
+asm_x86_instr *x86_read_instr_and_rm1632_imm1632(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_rm1632_imm1632(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_rel1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
@@ -62,6 +68,9 @@ asm_x86_instr *x86_read_instr_cmp_rm8_with_imm8(const uint8_t *, off_t *, off_t,
 asm_x86_instr *x86_read_instr_cmp_rm1632_with_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 /* Décode une instruction de type 'cmp' (16 ou 32 bits). */
+asm_x86_instr *x86_read_instr_cmp_rm1632_imm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'cmp' (16 ou 32 bits). */
 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'. */
@@ -124,12 +133,18 @@ asm_x86_instr *x86_read_instr_mov_r1632_to_rm1632(const uint8_t *, off_t *, off_
 /* Décode une instruction de type 'mov' (16 ou 32 bits). */
 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 'movzx' (8 bits). */
+asm_x86_instr *x86_read_instr_movzx_r1632_rm8(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_or_rm1632_with_imm8(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_or_rm1632_imm1632(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_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
@@ -142,21 +157,48 @@ asm_x86_instr *x86_read_instr_push_r1632(const uint8_t *, off_t *, off_t, uint64
 /* Décode une instruction de type 'push' (16 ou 32 bits). */
 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 'rcl' (8 bits). */
+asm_x86_instr *x86_read_instr_rcl_rm1632_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'rcr' (8 bits). */
+asm_x86_instr *x86_read_instr_rcr_rm1632_imm8(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 *);
 
+/* Décode une instruction de type 'rol' (8 bits). */
+asm_x86_instr *x86_read_instr_rol_rm1632_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'ror' (8 bits). */
+asm_x86_instr *x86_read_instr_ror_rm1632_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'sal' (8 bits). */
+#define x86_read_instr_sal_rm1632_imm8 x86_read_instr_shl_rm1632_imm8
+
 /* Décode une instruction de type 'sar' (8 bits). */
-asm_x86_instr *x86_read_instr_sar_rm1632_with_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+asm_x86_instr *x86_read_instr_sar_rm1632_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_sbb_rm1632_with_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
+/* Décode une instruction de type 'sbb' (16 ou 32 bits). */
+asm_x86_instr *x86_read_instr_sbb_rm1632_imm1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'shl' (8 bits). */
+asm_x86_instr *x86_read_instr_shl_rm1632_imm8(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
+
+/* Décode une instruction de type 'shr' (8 bits). */
+asm_x86_instr *x86_read_instr_shr_rm1632_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_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_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_rm1632_imm1632(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 *);
 
@@ -178,9 +220,6 @@ asm_x86_instr *x86_read_instr_xor_e_ax_with_imm1632(const uint8_t *, off_t *, of
 /* 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 *);
 
@@ -194,6 +233,9 @@ asm_x86_instr *x86_read_instr_xor_rm8_with_r8(const uint8_t *, off_t *, off_t, u
 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_xor_rm1632_imm1632(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_r1632(const uint8_t *, off_t *, off_t, uint64_t, const asm_x86_processor *);
 
 
diff --git a/src/arch/x86/processor.c b/src/arch/x86/processor.c
index 14f35bc..3fde754 100644
--- a/src/arch/x86/processor.c
+++ b/src/arch/x86/processor.c
@@ -41,11 +41,10 @@ typedef asm_x86_instr * (* read_instr) (const uint8_t *, off_t *, off_t, uint64_
 /* Carte d'identité d'un opcode */
 typedef struct _x86_opcode
 {
-    uint8_t prefix;                         /* préfixe eventuel            */
+    X86Prefix prefix;                       /* Préfixe(s) eventuel(s)      */
     uint8_t opcode;                         /* Opcode seul                 */
     uint8_t op_ext;                         /* Extension de l'opcode       */
 
-    bool opt_prefix;                        /* Préfixe optionnel ?         */
     bool has_op_ext;                        /* Ext. à prendre en compte ?  */
 
     const char *name;                       /* Désignation humaine         */
@@ -57,27 +56,61 @@ typedef struct _x86_opcode
 #define EXT_OPCODE_MASK     0x38
 
 
-#define register_opcode(target, _prefix, _opcode, _name, _read)                 \
+
+
+
+#define register_opcode(target, _opcode, _name, _read)                          \
+    do {                                                                        \
+        target.prefix = X86_PRE_NONE;                                           \
+        target.opcode = _opcode;                                                \
+        target.has_op_ext = false;                                              \
+        target.name = _name;                                                    \
+        target.read = _read;                                                    \
+    } while (0)
+
+#define register_opcode_1632(target, _opcode, _name, _read)                     \
     do {                                                                        \
-        target.prefix = _prefix;                                                \
+        target.prefix = X86_PRE_OPSIZE;                                         \
         target.opcode = _opcode;                                                \
-        target.opt_prefix = (_prefix != 0x00);                                  \
         target.has_op_ext = false;                                              \
         target.name = _name;                                                    \
         target.read = _read;                                                    \
     } while (0)
 
-#define register_opcode_with_ext(target, _prefix, _opcode, _ext, _name, _read)  \
+#define register_opcode_with_ext(target, _opcode, _ext, _name, _read)           \
     do {                                                                        \
-        target.prefix = _prefix;                                                \
+        target.prefix = X86_PRE_NONE;                                           \
         target.opcode = _opcode;                                                \
         target.op_ext = _ext << 3;                                              \
-        target.opt_prefix = (_prefix != 0x00);                                  \
         target.has_op_ext = true;                                               \
         target.name = _name;                                                    \
         target.read = _read;                                                    \
     } while (0)
 
+#define register_opcode_1632_with_ext(target, _opcode, _ext, _name, _read)      \
+    do {                                                                        \
+        target.prefix = X86_PRE_OPSIZE;                                         \
+        target.opcode = _opcode;                                                \
+        target.op_ext = _ext << 3;                                              \
+        target.has_op_ext = true;                                               \
+        target.name = _name;                                                    \
+        target.read = _read;                                                    \
+    } while (0)
+
+#define register_2b_opcode_1632(target, _opcode, _name, _read)                  \
+    do {                                                                        \
+        target.prefix = X86_PRE_ESCAPE | X86_PRE_OPSIZE;                        \
+        target.opcode = _opcode;                                                \
+        target.has_op_ext = false;                                              \
+        target.name = _name;                                                    \
+        target.read = _read;                                                    \
+    } while (0)
+
+
+
+
+
+
 
 
 
@@ -205,127 +238,140 @@ AsmOperandSize switch_x86_operand_size_if_needed(const asm_x86_processor *proc,
 
 void x86_register_instructions(asm_x86_processor *proc)
 {
-    register_opcode(proc->opcodes[X86_OP_ADD_RM8_R8], 0x00, 0x00, "add", x86_read_instr_add_rm8_r8);
-
-    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_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_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_ADD_RM8_R8], 0x00, "add", x86_read_instr_add_rm8_r8);
+
+    register_opcode_1632(proc->opcodes[X86_OP_SUB_R1632_RM1632], 0x29, "sub", x86_read_instr_sub_r1632_from_rm1632);
+
+    register_opcode(proc->opcodes[X86_OP_XOR_RM8_R8], 0x30, "xor", x86_read_instr_xor_rm8_with_r8);
+    register_opcode_1632(proc->opcodes[X86_OP_XOR_RM1632_R1632], 0x31, "xor", x86_read_instr_xor_rm1632_with_r1632);
+    register_opcode(proc->opcodes[X86_OP_XOR_R8_RM8], 0x32, "xor", x86_read_instr_xor_r8_with_rm8);
+    register_opcode_1632(proc->opcodes[X86_OP_XOR_R1632_RM1632], 0x33, "xor", x86_read_instr_xor_r1632_with_rm1632);
+    register_opcode(proc->opcodes[X86_OP_XOR_AL_IMM8], 0x34, "xor", x86_read_instr_xor_al_with_imm8);
+    register_opcode_1632(proc->opcodes[X86_OP_XOR_E_AX_IMM1632], 0x35, "xor", x86_read_instr_xor_e_ax_with_imm1632);
+
+    register_opcode_1632(proc->opcodes[X86_OP_CMP_RM1632_R1632], 0x39, "cmp", x86_read_instr_cmp_rm1632_with_r1632);
+
+    register_opcode_1632(proc->opcodes[X86_OP_INC_E_AX], 0x40, "inc", x86_read_instr_inc_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_INC_E_CX], 0x41, "inc", x86_read_instr_inc_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_INC_E_DX], 0x42, "inc", x86_read_instr_inc_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_INC_E_BX], 0x43, "inc", x86_read_instr_inc_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_INC_E_SP], 0x44, "inc", x86_read_instr_inc_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_INC_E_BP], 0x45, "inc", x86_read_instr_inc_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_INC_E_SI], 0x46, "inc", x86_read_instr_inc_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_INC_E_DI], 0x47, "inc", x86_read_instr_inc_r1632);
+
+    register_opcode_1632(proc->opcodes[X86_OP_DEC_E_AX], 0x48, "dec", x86_read_instr_dec_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_DEC_E_CX], 0x49, "dec", x86_read_instr_dec_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_DEC_E_DX], 0x4a, "dec", x86_read_instr_dec_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_DEC_E_BX], 0x4b, "dec", x86_read_instr_dec_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_DEC_E_SP], 0x4c, "dec", x86_read_instr_dec_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_DEC_E_BP], 0x4d, "dec", x86_read_instr_dec_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_DEC_E_SI], 0x4e, "dec", x86_read_instr_dec_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_DEC_E_DI], 0x4f, "dec", x86_read_instr_dec_r1632);
+
+    register_opcode_1632(proc->opcodes[X86_OP_PUSH_E_AX], 0x50, "push", x86_read_instr_push_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_PUSH_E_CX], 0x51, "push", x86_read_instr_push_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_PUSH_E_DX], 0x52, "push", x86_read_instr_push_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_PUSH_E_BX], 0x53, "push", x86_read_instr_push_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_PUSH_E_SP], 0x54, "push", x86_read_instr_push_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_PUSH_E_BP], 0x55, "push", x86_read_instr_push_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_PUSH_E_SI], 0x56, "push", x86_read_instr_push_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_PUSH_E_DI], 0x57, "push", x86_read_instr_push_r1632);
+
+    register_opcode_1632(proc->opcodes[X86_OP_POP_E_AX], 0x58, "pop", x86_read_instr_pop_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_POP_E_CX], 0x59, "pop", x86_read_instr_pop_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_POP_E_DX], 0x5a, "pop", x86_read_instr_pop_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_POP_E_BX], 0x5b, "pop", x86_read_instr_pop_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_POP_E_SP], 0x5c, "pop", x86_read_instr_pop_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_POP_E_BP], 0x5d, "pop", x86_read_instr_pop_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_POP_E_SI], 0x5e, "pop", x86_read_instr_pop_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_POP_E_DI], 0x5f, "pop", x86_read_instr_pop_r1632);
+
+    register_opcode_1632(proc->opcodes[X86_OP_PUSH_IMM1632], 0x68, "push", x86_read_instr_push_imm1632);
+
+    register_opcode(proc->opcodes[X86_OP_JE_8], 0x74, "je", x86_read_instr_je_8);
+    register_opcode(proc->opcodes[X86_OP_JNE_8], 0x75, "jne", x86_read_instr_jne_8);
+
+    register_opcode_with_ext(proc->opcodes[X86_OP_XOR_RM8_IMM8], 0x80, 6, "xor", x86_read_instr_xor_rm8_with_imm8);
+    register_opcode_with_ext(proc->opcodes[X86_OP_CMP_RM8_IMM8], 0x80, 7, "cmp", x86_read_instr_cmp_rm8_with_imm8);
+
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_ADD_RM1632_IMM1632], 0x81, 0, "add", x86_read_instr_add_rm1632_imm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_OR_RM1632_IMM1632], 0x81, 1, "or", x86_read_instr_or_rm1632_imm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_ADC_RM1632_IMM1632], 0x81, 2, "adc", x86_read_instr_adc_rm1632_imm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_SBB_RM1632_IMM1632], 0x81, 3, "sbb", x86_read_instr_sbb_rm1632_imm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_AND_RM1632_IMM1632], 0x81, 4, "and", x86_read_instr_and_rm1632_imm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_SUB_RM1632_IMM1632], 0x81, 5, "sub", x86_read_instr_sub_rm1632_imm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_XOR_RM1632_IMM1632], 0x81, 6, "xor", x86_read_instr_xor_rm1632_imm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_CMP_RM1632_IMM1632], 0x81, 7, "cmp", x86_read_instr_cmp_rm1632_imm1632);
+
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_ADD_RM1632_IMM8], 0x83, 0, "add", x86_read_instr_add_imm8_to_rm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_OR_RM1632_IMM8], 0x83, 1, "or", x86_read_instr_or_rm1632_with_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_ADC_RM1632_IMM8], 0x83, 2, "adc", x86_read_instr_adc_imm8_to_rm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_SBB_RM1632_IMM8], 0x83, 3, "sbb", x86_read_instr_sbb_rm1632_with_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_AND_RM1632_IMM8], 0x83, 4, "and", x86_read_instr_and_rm1632_with_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_SUB_RM1632_IMM8], 0x83, 5, "sub", x86_read_instr_sub_imm8_from_rm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_XOR_RM1632_IMM8], 0x83, 6, "xor", x86_read_instr_xor_rm1632_with_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_CMP_RM1632_IMM8], 0x83, 7, "cmp", x86_read_instr_cmp_rm1632_with_imm8);
+
+    register_opcode(proc->opcodes[X86_OP_TEST_RM8_R8], 0x84, "test", x86_read_instr_test_rm8_with_r8);
+    register_opcode_1632(proc->opcodes[X86_OP_TEST_RM1632_R1632], 0x85, "test", x86_read_instr_test_rm1632_with_r1632);
+
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_RM1632_R1632], 0x89, "mov", x86_read_instr_mov_r1632_to_rm1632);
+
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_R1632_RM1632], 0x8b, "mov", x86_read_instr_mov_rm1632_to_r1632);
+
+    register_opcode_1632(proc->opcodes[X86_OP_LEA], 0x8d, "lea", x86_read_instr_lea);
+
+    register_opcode(proc->opcodes[X86_OP_NOP], 0x90, "nop", x86_read_instr_nop);
+
+    register_opcode(proc->opcodes[X86_OP_MOV_MOFFS_TO_AL], 0xa0, "mov", x86_read_instr_mov_moffs8_to_al);
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_MOFFS_TO_E_AX], 0xa1, "mov", x86_read_instr_mov_moffs1632_to_e_ax);
+    register_opcode(proc->opcodes[X86_OP_MOV_AL_TO_MOFFS], 0xa2, "mov", x86_read_instr_mov_al_to_moffs8);
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_E_AX_TO_MOFFS], 0xa3, "mov", x86_read_instr_mov_e_ax_to_moffs1632);
+
+    register_opcode(proc->opcodes[X86_OP_TEST_AL], 0xa8, "test", x86_read_instr_test_al);
+    register_opcode_1632(proc->opcodes[X86_OP_TEST_E_AX], 0xa9, "test", x86_read_instr_test_e_ax);
+
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_E_AX], 0xb8, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_E_CX], 0xb9, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_E_DX], 0xba, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_E_BX], 0xbb, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_E_SP], 0xbc, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_E_BP], 0xbd, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_E_SI], 0xbe, "mov", x86_read_instr_mov_imm1632_to_r1632);
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_E_DI], 0xbf, "mov", x86_read_instr_mov_imm1632_to_r1632);
+
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_ROL_RM1632_IMM8], 0xc1, 0, "rol", x86_read_instr_rol_rm1632_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_ROR_RM1632_IMM8], 0xc1, 1, "ror", x86_read_instr_ror_rm1632_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_RCL_RM1632_IMM8], 0xc1, 2, "rcl", x86_read_instr_rcl_rm1632_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_RCR_RM1632_IMM8], 0xc1, 3, "rcr", x86_read_instr_rcr_rm1632_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_SHL_RM1632_IMM8], 0xc1, 4, "shl", x86_read_instr_shl_rm1632_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_SHR_RM1632_IMM8], 0xc1, 5, "shr", x86_read_instr_shr_rm1632_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_SAL_RM1632_IMM8], 0xc1, 6, "sal", x86_read_instr_sal_rm1632_imm8);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_SAR_RM1632_IMM8], 0xc1, 7, "sar", x86_read_instr_sar_rm1632_imm8);
+
+    register_opcode(proc->opcodes[X86_OP_RET], 0xc3, "ret", x86_read_instr_ret);
+
+    register_opcode(proc->opcodes[X86_OP_MOV_IMM8_TO_RM8], 0xc6, "mov", x86_read_instr_mov_imm8_to_rm8);
+    register_opcode_1632(proc->opcodes[X86_OP_MOV_IMM1632_TO_RM1632], 0xc7, "mov", x86_read_instr_mov_imm1632_to_rm1632);
+
+    register_opcode(proc->opcodes[X86_OP_LEAVE], 0xc9, "leave", x86_read_instr_leave);
+
+    register_opcode(proc->opcodes[X86_OP_INT], 0xcd, "int", x86_read_instr_int);
 
-    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_1632(proc->opcodes[X86_OP_CALL_REL1632], 0xe8, "call", x86_read_instr_call_rel1632);
+    register_opcode_1632(proc->opcodes[X86_OP_JMP_REL1632], 0xe9, "jmp", x86_read_instr_jmp_rel1632);
 
-    register_opcode_with_ext(proc->opcodes[X86_OP_ADD_RM1632_IMM1632], 0x66, 0x81, 0, "add", x86_read_instr_add_imm1632_to_rm1632);
+    register_opcode(proc->opcodes[X86_OP_JMP_8], 0xeb, "jmp", x86_read_instr_jmp_8);
 
-    register_opcode_with_ext(proc->opcodes[X86_OP_XOR_RM1632_IMM1632], 0x66, 0x81, 6, "xor", x86_read_instr_xor_rm1632_with_imm1632);
+    register_opcode(proc->opcodes[X86_OP_HLT], 0xf4, "hlt", x86_read_instr_hlt);
 
-    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_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_RM1632_R1632], 0x66, 0x89, "mov", x86_read_instr_mov_r1632_to_rm1632);
-
-    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);
-
-    register_opcode(proc->opcodes[X86_OP_NOP], 0x00, 0x90, "nop", x86_read_instr_nop);
-
-    register_opcode(proc->opcodes[X86_OP_MOV_MOFFS_TO_AL], 0x00, 0xa0, "mov", x86_read_instr_mov_moffs8_to_al);
-    register_opcode(proc->opcodes[X86_OP_MOV_MOFFS_TO_E_AX], 0x66, 0xa1, "mov", x86_read_instr_mov_moffs1632_to_e_ax);
-    register_opcode(proc->opcodes[X86_OP_MOV_AL_TO_MOFFS], 0x00, 0xa2, "mov", x86_read_instr_mov_al_to_moffs8);
-    register_opcode(proc->opcodes[X86_OP_MOV_E_AX_TO_MOFFS], 0x66, 0xa3, "mov", x86_read_instr_mov_e_ax_to_moffs1632);
-
-    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_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_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_REL1632], 0x66, 0xe8, "call", x86_read_instr_call_rel1632);
-    register_opcode(proc->opcodes[X86_OP_JMP_REL1632], 0x66, 0xe9, "jmp", x86_read_instr_jmp_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_JMP_RM1632], 0x66, 0xff, 4, "jmp", x86_read_instr_jmp_rm1632);
-    register_opcode_with_ext(proc->opcodes[X86_OP_PUSH_RM1632], 0x66, 0xff, 6, "push", x86_read_instr_push_rm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_CALL_RM1632], 0xff, 2, "call", x86_read_instr_call_rm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_JMP_RM1632], 0xff, 4, "jmp", x86_read_instr_jmp_rm1632);
+    register_opcode_1632_with_ext(proc->opcodes[X86_OP_PUSH_RM1632], 0xff, 6, "push", x86_read_instr_push_rm1632);
 
+    //register_2b_opcode_1632(proc->opcodes[X86_OP_MOVZX_R1632_RM8], 0xb6, "movzx", x86_read_instr_movzx_r1632_rm8);
 
 }
 
@@ -351,48 +397,46 @@ void x86_register_instructions(asm_x86_processor *proc)
 asm_instr *x86_fetch_instruction(const asm_x86_processor *proc, const uint8_t *data, off_t *pos, off_t len, uint64_t offset)
 {
     asm_x86_instr *result;                  /* Résultat à faire remonter   */
+    X86Prefix prefix;                       /* Préfixe détecté             */
     X86Opcodes i;                           /* Boucle de parcours          */
-    off_t tmp;                              /* Tête de lecture             */
-    off_t old_pos;                          /* Sauvegarde de la position   */
 
     result = NULL;
 
-    for (i = 0; i < X86_OP_COUNT; i++)
+    prefix = X86_PRE_NONE;
+
+ consume_prefix:
+
+    switch (data[*pos])
     {
-        if (proc->opcodes[i].prefix > 0 && data[*pos] == proc->opcodes[i].prefix && data[*pos + 1] == proc->opcodes[i].opcode)
-        {
-            tmp = *pos + 2;
-            goto find_instr;
-        }
+        case 0x66:
+            prefix |= X86_PRE_OPSIZE;
+            (*pos)++;
+            break;
 
-        if (proc->opcodes[i].opt_prefix && data[*pos] == proc->opcodes[i].opcode)
-        {
-            tmp = *pos + 1;
-            goto find_instr;
-        }
+        case 0x0f:
+            prefix |= X86_PRE_ESCAPE;
+            (*pos)++;
+            break;
 
-        if (proc->opcodes[i].prefix == 0x00 && data[*pos] == proc->opcodes[i].opcode)
-        {
-            tmp = *pos + 1;
-            goto find_instr;
-        }
+        default:
+            goto found_instr;
+            break;
+
+    }
 
-        continue;
+    goto consume_prefix;
 
- find_instr:
+ found_instr:
 
-        if (proc->opcodes[i].has_op_ext && (data[tmp] & EXT_OPCODE_MASK) != proc->opcodes[i].op_ext)
-            continue;
+    for (i = 0; i < X86_OP_COUNT; i++)
+    {
+        if ((prefix & proc->opcodes[i].prefix) != prefix) continue;
 
-        old_pos = *pos;
+        if (data[*pos] != proc->opcodes[i].opcode) continue;
 
         result = proc->opcodes[i].read(data, pos, len, offset, proc);
         if (result != NULL) result->type = i;
-        else
-        {
-            *pos = old_pos;
-            printf("err while x86 decoding at 0x%08llx :: [0x%02hhx] 0x%02hhx\n", offset, proc->opcodes[i].prefix, proc->opcodes[i].opcode);
-        }
+
         break;
 
     }