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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * ##FILE## - traduction d'instructions ARMv7
+ *
+ * Copyright (C) 2014 Cyrille Bagard
+ *
+ * This file is part of Chrysalide.
+ *
+ * Chrysalide 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.
+ *
+ * Chrysalide 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/>.
+ */
+
+
+@title LDRB (immediate, Thumb)
+
+@encoding(t1) {
+
+ @half 0 1 1 1 1 imm5(5) Rn(3) Rt(3)
+
+ @syntax <Rgt>, <access>
+
+ @conv {
+
+ Rgt = Register(Rt)
+ Rgn = Register(Rn)
+ imm32 = ZeroExtend(imm5, 5, 32)
+ access = MakeMemoryAccess(Rgn, imm32, 1, 0)
+
+ }
+
+}
+
+@encoding(T2) {
+
+ @word 1 1 1 1 1 0 0 0 1 0 0 1 Rn(4) Rt(4) imm12(12)
+
+ @syntax "ldrb.W" <Rgt>, <access>
+
+ @conv {
+
+ Rgt = Register(Rt)
+ Rgn = Register(Rn)
+ imm32 = ZeroExtend(imm12, 12, 32)
+ access = MakeMemoryAccess(Rgn, imm32, 1, 0)
+
+ }
+
+ @rules {
+
+ //if Rt == '1111' then SEE PLD;
+ //if Rn == '1111' then SEE LDRB (literal);
+ //if t == 13 then UNPREDICTABLE;
+
+ }
+
+}
+
+@encoding(T31) {
+
+ @word 1 1 1 1 1 0 0 0 0 0 0 1 Rn(4) Rt(4) 1 1 U(1) W(1) imm8(8)
+
+ @syntax <Rgt> <access>
+
+ @conv {
+
+ Rgt = Register(Rt)
+ Rgn = Register(Rn)
+ imm32 = ZeroExtend(imm8, 8, 32);
+ access = MakeMemoryAccess(Rgn, imm32, U, W)
+
+ }
+
+ @rules {
+
+ //if Rt == '1111' && P == '1' && U == '0' && W == '0' then SEE PLD, PLDW (immediate);
+ //if Rn == '1111' then SEE LDRB (literal);
+ //if P == '1' && U == '1' && W == '0' then SEE LDRBT;
+ //if P == '0' && W == '0' then UNDEFINED;
+ //if t == 13 || (t == 15 && W == '1') || (wback && n == t) then UNPREDICTABLE;
+
+ }
+
+}
+
+@encoding(T32) {
+
+ @word 1 1 1 1 1 0 0 0 0 0 0 1 Rn(4) Rt(4) 1 0 U(1) W(1) imm8(8)
+
+ @syntax <Rgt> <base> <offset>
+
+ @conv {
+
+ Rgt = Register(Rt)
+ Rgn = Register(Rn)
+ imm32 = ZeroExtend(imm8, 8, 32);
+ base = MakeMemoryNotIndexed(Rgn, W)
+ offset = MakeAccessOffset(U, imm32)
+
+ }
+
+ @rules {
+
+ //if Rt == '1111' && P == '1' && U == '0' && W == '0' then SEE PLD, PLDW (immediate);
+ //if Rn == '1111' then SEE LDRB (literal);
+ //if P == '1' && U == '1' && W == '0' then SEE LDRBT;
+ //if P == '0' && W == '0' then UNDEFINED;
+ //if t == 13 || (t == 15 && W == '1') || (wback && n == t) then UNPREDICTABLE;
+
+ }
+
+}