Treat VEX.vvvv as a 3-bit field outside of 64-bit mode. Prevents access to registers xmm8-xmm15 outside 64-bit mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140997 91177308-0d34-0410-b5e6-96231b3b80d8
2025-07-25 13:24:46 +00:00 · 2011-10-03 08:14:29 +00:00
parent 04b0b34b3a
commit 04c5be9f12
3 changed files with 9 additions and 0 deletions
--- a/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c
+++ b/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c
@@ -1491,6 +1491,9 @@ static int readVVVV(struct InternalInstruction* insn) {
  else
    return -1;

+  if (insn->mode != MODE_64BIT)
+    insn->vvvv &= 0x7;
+
  return 0;
 }