When we generalize {s}extract_i32, we'll lose the
specific register constraints on ext8u and ext8s.
It's just as easy to emit a couple of insns instead.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/i386/tcg-target.c.inc | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)
diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc
index e51269f81d..047c5da81c 100644
--- a/tcg/i386/tcg-target.c.inc
+++ b/tcg/i386/tcg-target.c.inc
@@ -1329,16 +1329,31 @@ static inline void tcg_out_rolw_8(TCGContext *s, int
reg)
static void tcg_out_ext8u(TCGContext *s, TCGReg dest, TCGReg src)
{
- /* movzbl */
- tcg_debug_assert(src < 4 || TCG_TARGET_REG_BITS == 64);
+ if (TCG_TARGET_REG_BITS == 32 && src >= 4) {
+ tcg_out_mov(s, TCG_TYPE_I32, dest, src);
+ if (dest >= 4) {
+ tcg_out_modrm(s, OPC_ARITH_EvIz, ARITH_AND, dest);
+ tcg_out32(s, 0xff);
+ return;
+ }
+ src = dest;
+ }
tcg_out_modrm(s, OPC_MOVZBL + P_REXB_RM, dest, src);
}
static void tcg_out_ext8s(TCGContext *s, TCGType type, TCGReg dest, TCGReg src)
{
int rexw = type == TCG_TYPE_I32 ? 0 : P_REXW;
- /* movsbl */
- tcg_debug_assert(src < 4 || TCG_TARGET_REG_BITS == 64);
+
+ if (TCG_TARGET_REG_BITS == 32 && src >= 4) {
+ tcg_out_mov(s, TCG_TYPE_I32, dest, src);
+ if (dest >= 4) {
+ tcg_out_shifti(s, SHIFT_SHL, dest, 24);
+ tcg_out_shifti(s, SHIFT_SAR, dest, 24);
+ return;
+ }
+ src = dest;
+ }
tcg_out_modrm(s, OPC_MOVSBL + P_REXB_RM + rexw, dest, src);
}