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diff --git a/plugins/arm/v7/opdefs/A88139_qdsub.d b/plugins/arm/v7/opdefs/A88139_qdsub.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 QDSUB
+
+@id 132
+
+@desc {
+
+	Saturating Double and Subtract subtracts a doubled register value from another register value, and writes the result to the destination register. Both the doubling and the subtraction have their results saturated to the 32-bit signed integer range –231 ≤ x ≤ 231 – 1. If saturation occurs in either operation, it sets the Q flag in the APSR.
+
+}
+
+@encoding (T1) {
+
+	@word 1 1 1 1 1 0 1 0 1 0 0 0 Rn(4) 1 1 1 1 Rd(4) 1 0 1 1 Rm(4)
+
+	@syntax {
+
+		@subid 409
+
+		@conv {
+
+			reg_D = Register(Rd)
+			reg_M = Register(Rm)
+			reg_N = Register(Rn)
+
+		}
+
+		@asm qdsub ?reg_D reg_M reg_N
+
+	}
+
+}
+
+@encoding (A1) {
+
+	@word cond(4) 0 0 0 1 0 1 1 0 Rn(4) Rd(4) 0 0 0 0 0 1 0 1 Rm(4)
+
+	@syntax {
+
+		@subid 410
+
+		@conv {
+
+			reg_D = Register(Rd)
+			reg_M = Register(Rm)
+			reg_N = Register(Rn)
+
+		}
+
+		@asm qdsub ?reg_D reg_M reg_N
+
+		@rules {
+
+			check g_arm_instruction_set_cond(cond)
+
+		}
+
+	}
+
+}
+