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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * ##FILE## - traduction d'instructions ARMv7
+ *
+ * Copyright (C) 2015 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 SUB (immediate, Thumb)
+
+@desc This instruction subtracts an immediate value from a register value, and writes the result to the destination register. It can optionally update the condition flags based on the result.
+
+@encoding (t1) {
+
+ @half 0 0 0 1 1 1 1 imm3(3) Rn(3) Rd(3)
+
+ @syntax "subs" <reg_D> <reg_N> <imm32>
+
+ @conv {
+
+ reg_D = Register(Rd)
+ reg_N = Register(Rn)
+ imm32 = ZeroExtend(imm3, 32)
+
+ }
+
+}
+
+@encoding (t2) {
+
+ @half 0 0 1 1 1 Rdn(3) imm8(8)
+
+ @syntax "subs" <reg_DN> <imm32>
+
+ @conv {
+
+ reg_DN = Register(Rdn)
+ imm32 = ZeroExtend(imm8, 32)
+
+ }
+
+}
+
+@encoding (T3) {
+
+ @word 1 1 1 1 0 i(1) 0 1 1 0 1 S(1) Rn(4) 0 imm3(3) Rd(4) imm8(8)
+
+ @syntax <reg_D> <reg_N> <imm32>
+
+ @conv {
+
+ reg_D = Register(Rd)
+ reg_N = Register(Rn)
+ setflags = (S == '1')
+ imm32 = ThumbExpandImm(i:imm3:imm8)
+
+ }
+
+ @rules {
+
+ if (setflags); chk_call ExtendKeyword("s")
+ chk_call ExtendKeyword(".w")
+
+ }
+
+}
+
+@encoding (T4) {
+
+ @word 1 1 1 1 0 i(1) 1 0 1 0 1 0 Rn(4) 0 imm3(3) Rd(4) imm8(8)
+
+ @syntax "subw" <reg_D> <reg_N> <imm32>
+
+ @conv {
+
+ reg_D = Register(Rd)
+ reg_N = Register(Rn)
+ imm32 = ZeroExtend(i:imm3:imm8, 32)
+
+ }
+
+}
+