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X-Received-From: 2607:f8b0:4864:20::544 Subject: [Qemu-devel] [PATCH 01/16] tcg/i386: Fix dupi/dupm for avx1 and 32-bit hosts X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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: 1e262b49b533 Tested-by: Mark Cave-Ayland Reported-by: Mark Cave-Ayland Signed-off-by: Richard Henderson --- tcg/i386/tcg-target.inc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/tcg/i386/tcg-target.inc.c b/tcg/i386/tcg-target.inc.c index aafd01cb49..b3601446cd 100644 --- a/tcg/i386/tcg-target.inc.c +++ b/tcg/i386/tcg-target.inc.c @@ -358,6 +358,7 @@ static inline int tcg_target_const_match(tcg_target_lon= g 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 typ= e, unsigned vece, } else { switch (vece) { case MO_64: - tcg_out_vex_modrm_offset(s, OPC_VBROADCASTSD, r, 0, base, offs= et); + 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, offs= et); @@ -963,12 +964,12 @@ static void tcg_out_dupi_vec(TCGContext *s, TCGType t= ype, } 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); } --=20 2.17.1