Bug solved: SSE variant of MOVSD incorrectly decoded as REPNE MOVSD (c…

…apstone-engine#1540)
atkdef · Feb 21, 2020 · e7d2715 · e7d2715
1 parent 2596f3b
commit e7d2715
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/arch/X86/X86Mapping.c b/arch/X86/X86Mapping.c
@@ -3099,7 +3099,6 @@ static bool valid_repne(cs_struct *h, unsigned int opcode)
 
 			case X86_INS_MOVSB:
 			case X86_INS_MOVSW:
-			case X86_INS_MOVSD:
 			case X86_INS_MOVSQ:
 
 			case X86_INS_LODSB:
@@ -3122,6 +3121,11 @@ static bool valid_repne(cs_struct *h, unsigned int opcode)
 
 				return true;
 
+			case X86_INS_MOVSD:
+				if (opcode == X86_MOVSW) // REP MOVSB
+					return true;
+				return false;
+
 			case X86_INS_CMPSD:
 				if (opcode == X86_CMPSL) // REP CMPSD
 					return true;