| Message ID | 20240812025844.58956-2-richard.henderson@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | target/i386: Do not apply REX to MMX operands | expand |
diff --git a/target/i386/tcg/decode-new.c.inc b/target/i386/tcg/decode-new.c.inc index b22210f45d..03138b3876 100644 --- a/target/i386/tcg/decode-new.c.inc +++ b/target/i386/tcg/decode-new.c.inc @@ -1979,7 +1979,10 @@ static bool decode_op(DisasContext *s, CPUX86State *env, X86DecodedInsn *decode, op->unit = X86_OP_SSE; } get_reg: - op->n = ((get_modrm(s, env) >> 3) & 7) | REX_R(s); + op->n = ((get_modrm(s, env) >> 3) & 7); + if (op->unit != X86_OP_MMX) { + op->n |= REX_R(s); + } break; case X86_TYPE_E: /* ALU modrm operand */
Cc: qemu-stable@nongnu.org Fixes: b3e22b2318a ("target/i386: add core of new i386 decoder") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2495 Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- target/i386/tcg/decode-new.c.inc | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)