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tcg/i386: Fix dupi/dupm for avx1 and 32-bit hosts 

The VBROADCASTSD instruction only allows %ymm registers as destination.
Rather than forcing VEX.L and writing to the entire 256-bit register,
revert to using MOVDDUP with an %xmm register.  This is sufficient for
an avx1 host since we do not support TCG_TYPE_V256 for that case.

Also fix the 32-bit avx2, which should have used VPBROADCASTW.

Fixes: 1e262b49b5
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
master
Richard Henderson 2019-05-16 15:11:17 -07:00
parent a4f667b671
commit 7b60ef3264
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
tcg/i386/tcg-target.inc.c
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@ -358,6 +358,7 @@ static inline int tcg_target_const_match(tcg_target_long val, TCGType type,
#define OPC_MOVBE_MyGy (0xf1 | P_EXT38)
#define OPC_MOVD_VyEy (0x6e | P_EXT | P_DATA16)
#define OPC_MOVD_EyVy (0x7e | P_EXT | P_DATA16)
#define OPC_MOVDDUP (0x12 | P_EXT | P_SIMDF2)
#define OPC_MOVDQA_VxWx (0x6f | P_EXT | P_DATA16)
#define OPC_MOVDQA_WxVx (0x7f | P_EXT | P_DATA16)
#define OPC_MOVDQU_VxWx (0x6f | P_EXT | P_SIMDF3)
@ -921,7 +922,7 @@ static bool tcg_out_dupm_vec(TCGContext *s, TCGType type, unsigned vece,
} else {
switch (vece) {
case MO_64:
tcg_out_vex_modrm_offset(s, OPC_VBROADCASTSD, r, 0, base, offset);
tcg_out_vex_modrm_offset(s, OPC_MOVDDUP, r, 0, base, offset);
break;
case MO_32:
tcg_out_vex_modrm_offset(s, OPC_VBROADCASTSS, r, 0, base, offset);
@ -963,12 +964,12 @@ static void tcg_out_dupi_vec(TCGContext *s, TCGType type,
} else if (have_avx2) {
tcg_out_vex_modrm_pool(s, OPC_VPBROADCASTQ + vex_l, ret);
} else {
tcg_out_vex_modrm_pool(s, OPC_VBROADCASTSD, ret);
tcg_out_vex_modrm_pool(s, OPC_MOVDDUP, ret);
}
new_pool_label(s, arg, R_386_PC32, s->code_ptr - 4, -4);
} else {
if (have_avx2) {
tcg_out_vex_modrm_pool(s, OPC_VBROADCASTSD + vex_l, ret);
tcg_out_vex_modrm_pool(s, OPC_VPBROADCASTW + vex_l, ret);
} else {
tcg_out_vex_modrm_pool(s, OPC_VBROADCASTSS, ret);
}