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tcg/i386: Output %gs prefix in tcg_out_vex_opc

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Missing the segment prefix means that user-only fails
to add guest_base for some 128-bit load/store.

Fixes: 098d0fc10d2 ("tcg/i386: Support 128-bit load/store")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1763
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-08-12 08:48:18 -07:00
parent bb5f142cb3
commit d3b41127c2
1 changed files with 3 additions and 0 deletions
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3
tcg/i386/tcg-target.c.inc
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@ -595,6 +595,9 @@ static void tcg_out_vex_opc(TCGContext *s, int opc, int r, int v,
{ {
int tmp; int tmp;
if (opc & P_GS) {
tcg_out8(s, 0x65);
}
/* Use the two byte form if possible, which cannot encode /* Use the two byte form if possible, which cannot encode
VEX.W, VEX.B, VEX.X, or an m-mmmm field other than P_EXT. */ VEX.W, VEX.B, VEX.X, or an m-mmmm field other than P_EXT. */
if ((opc & (P_EXT | P_EXT38 | P_EXT3A | P_VEXW)) == P_EXT if ((opc & (P_EXT | P_EXT38 | P_EXT3A | P_VEXW)) == P_EXT