>From the manual: "In 64-bit mode all 4 bits may be used. [...] In 32-bit and 16-bit modes bit 6 must be 1 (if bit 6 is not 1, the 2-byte VEX version will generate LDS instruction and the 3-byte VEX version will ignore this bit)."
Cc: [email protected] Signed-off-by: Paolo Bonzini <[email protected]> --- target/i386/tcg/decode-new.c.inc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/i386/tcg/decode-new.c.inc b/target/i386/tcg/decode-new.c.inc index 0b85b0f6513..c9b4d5ffa32 100644 --- a/target/i386/tcg/decode-new.c.inc +++ b/target/i386/tcg/decode-new.c.inc @@ -2665,7 +2665,7 @@ static void disas_insn(DisasContext *s, CPUState *cpu) goto unknown_op; } } - s->vex_v = (~vex3 >> 3) & 0xf; + s->vex_v = (~vex3 >> 3) & (CODE64(s) ? 15 : 7); s->vex_l = (vex3 >> 2) & 1; s->prefix |= pp_prefix[vex3 & 3] | PREFIX_VEX; } -- 2.52.0
