x86: adjust {,E}VEX.W handling outside of 64-bit mode

[deliverable/binutils-gdb.git] / gas / config / tc-i386.c

diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index 7d4ffc8dad24b0d2f8e3586c0b70f68c5e18070b..4fe9f0dda69abadb089395e0934b205b2e0582a2 100644 (file)
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -3453,7 +3453,7 @@ build_vex_prefix (const insn_template *t)
   else if (i.tm.opcode_modifier.vexw)
     w = i.tm.opcode_modifier.vexw == VEXW1 ? 1 : 0;
   else
-    w = (i.rex & REX_W) ? 1 : 0;
+    w = (flag_code == CODE_64BIT ? i.rex & REX_W : vexwig == vexw1) ? 1 : 0;
 
   /* Use 2-byte VEX prefix if possible.  */
   if (w == 0
@@ -3646,7 +3646,7 @@ build_evex_prefix (void)
   else if (i.tm.opcode_modifier.vexw)
     w = i.tm.opcode_modifier.vexw == VEXW1 ? 1 : 0;
   else
-    w = (i.rex & REX_W) ? 1 : 0;
+    w = (flag_code == CODE_64BIT ? i.rex & REX_W : evexwig == evexw1) ? 1 : 0;
 
   /* Encode the U bit.  */
   implied_prefix |= 0x4;