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diff --git a/plugins/arm/v7/opdefs/A887_add.d b/plugins/arm/v7/opdefs/A887_add.d
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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * ##FILE## - traduction d'instructions ARMv7
+ *
+ * Copyright (C) 2017 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+@title ADD (register, ARM)
+
+@id 6
+
+@desc {
+
+ This instruction adds a register value and an optionally-shifted register value, and writes the result to the destination register. It can optionally update the condition flags based on the result.
+
+}
+
+@encoding (A1) {
+
+ @word cond(4) 0 0 0 0 1 0 0 S(1) Rn(4) Rd(4) imm5(5) type(2) 0 Rm(4)
+
+ @syntax {
+
+ @subid 22
+
+ @assert {
+
+ S == 0
+
+ }
+
+ @conv {
+
+ reg_D = Register(Rd)
+ reg_N = Register(Rn)
+ reg_M = Register(Rm)
+ shift = DecodeImmShift(type, imm5)
+
+ }
+
+ @asm add ?reg_D reg_N reg_M ?shift
+
+ @rules {
+
+ check g_arm_instruction_set_cond(cond)
+
+ }
+
+ }
+
+ @syntax {
+
+ @subid 23
+
+ @assert {
+
+ S == 1
+
+ }
+
+ @conv {
+
+ reg_D = Register(Rd)
+ reg_N = Register(Rn)
+ reg_M = Register(Rm)
+ shift = DecodeImmShift(type, imm5)
+
+ }
+
+ @asm adds ?reg_D reg_N reg_M ?shift
+
+ @rules {
+
+ check g_arm_instruction_set_cond(cond)
+
+ }
+
+ }
+
+}
+