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[174.21.149.226]) by smtp.gmail.com with ESMTPSA id m189sm13928532pfm.60.2020.04.18.08.56.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Apr 2020 08:56:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=yo0JFxbi1JQMS1C5IWuwNJ4cHonOrcnEkwrUJKkp0u0=; b=OAOk90dPG7IQflKcg2lah7u11hKgaZp3mdfoPlM9YQlUqvyLaXotiOBmUqHIbxEJXt sS0zX5/eu6F00A4PIHUobNr76qZ+K9mT5FvoCGLqIe9y4D/Ml43uAu9W3vvwobUI7nsW b61GDK6aDiv/6IMTiW1jXigT4Za/s8evxh614FgOiKXa2StY1aeJ5CudLM8I2cNqU7Qk Au8CqPmBarbUnOTaZXovwflbGaN2gxizOMFOWXHBQV5q4WCSGHhtREdQt/xsY2lZEODW E0HOWSEK2m/rtxEEvtTq80cXM+Dl+x+IWiOzadSSyBOumLEFPX3Kb1UgMgMK+3bkeO7h Kgjg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=yo0JFxbi1JQMS1C5IWuwNJ4cHonOrcnEkwrUJKkp0u0=; b=tNpgeSey7lKdVKrG15m5htDwnahIRBWgv+++7WKfUyM5rfalJTA2ka/6yiJ3/UO5Sc RzzF6EaI8rrk9ug9c/fOma1ZmXe0SvFuac0rd2yMIyAHGUw+mHcNv3fHTONop4d+vtio +4pVGHMloGsNKTbg/0+hBbdj4K4fCXgLAlZGcwU+gM8UulHJy8VCzUAQxSJV6X0EKFk7 U2d6KBeNgkH51VVyxMbivSfz05uOxMp+7fYQjJV3iP3Hc1wgntIoozX1naPfgr7vZrfn mc/RY9kd3xR1Pwqzq6cr0vwo5KoJD6Zu1xuGKNL2HAgiz4sFnmEwuEOOCAtTg4GQ4+3N 7vfA== X-Gm-Message-State: AGi0PuY3JOICg1QOLdM8sWwx275bshkD8iDRuMvLhfFVfOb4q+UwCYIK xYZggm3MqQpHr25M8B+tfK2jD6Tg6Xc= X-Google-Smtp-Source: APiQypJ4MDMhghhhF3T6drb/MXMrCCuCvV121GiBZmNkY+4F2JIvWVXpa1F78+izPB+LxtjWXBdaDQ== X-Received: by 2002:a17:90a:aa84:: with SMTP id l4mr2208196pjq.177.1587225418014; Sat, 18 Apr 2020 08:56:58 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 3/3] target/arm: Use clear_vec_high more effectively Date: Sat, 18 Apr 2020 08:56:51 -0700 Message-Id: <20200418155651.3901-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200418155651.3901-1-richard.henderson@linaro.org> References: <20200418155651.3901-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::1044 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" Do not explicitly store zero to the NEON high part when we can pass !is_q to clear_vec_high. Signed-off-by: Richard Henderson Reviewed-by: Alex Benn=C3=A9e --- target/arm/translate-a64.c | 59 +++++++++++++++++++++++--------------- 1 file changed, 36 insertions(+), 23 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index d57aa54d6a..bf82a2e115 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -948,11 +948,10 @@ static void do_fp_ld(DisasContext *s, int destidx, TC= Gv_i64 tcg_addr, int size) { /* This always zero-extends and writes to a full 128 bit wide vector */ TCGv_i64 tmplo =3D tcg_temp_new_i64(); - TCGv_i64 tmphi; + TCGv_i64 tmphi =3D NULL; =20 if (size < 4) { MemOp memop =3D s->be_data + size; - tmphi =3D tcg_const_i64(0); tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), memop); } else { bool be =3D s->be_data =3D=3D MO_BE; @@ -970,12 +969,13 @@ static void do_fp_ld(DisasContext *s, int destidx, TC= Gv_i64 tcg_addr, int size) } =20 tcg_gen_st_i64(tmplo, cpu_env, fp_reg_offset(s, destidx, MO_64)); - tcg_gen_st_i64(tmphi, cpu_env, fp_reg_hi_offset(s, destidx)); - tcg_temp_free_i64(tmplo); - tcg_temp_free_i64(tmphi); =20 - clear_vec_high(s, true, destidx); + if (tmphi) { + tcg_gen_st_i64(tmphi, cpu_env, fp_reg_hi_offset(s, destidx)); + tcg_temp_free_i64(tmphi); + } + clear_vec_high(s, tmphi !=3D NULL, destidx); } =20 /* @@ -6969,8 +6969,8 @@ static void disas_simd_ext(DisasContext *s, uint32_t = insn) return; } =20 - tcg_resh =3D tcg_temp_new_i64(); tcg_resl =3D tcg_temp_new_i64(); + tcg_resh =3D NULL; =20 /* Vd gets bits starting at pos bits into Vm:Vn. This is * either extracting 128 bits from a 128:128 concatenation, or @@ -6982,7 +6982,6 @@ static void disas_simd_ext(DisasContext *s, uint32_t = insn) read_vec_element(s, tcg_resh, rm, 0, MO_64); do_ext64(s, tcg_resh, tcg_resl, pos); } - tcg_gen_movi_i64(tcg_resh, 0); } else { TCGv_i64 tcg_hh; typedef struct { @@ -6997,6 +6996,7 @@ static void disas_simd_ext(DisasContext *s, uint32_t = insn) pos -=3D 64; } =20 + tcg_resh =3D tcg_temp_new_i64(); read_vec_element(s, tcg_resl, elt->reg, elt->elt, MO_64); elt++; read_vec_element(s, tcg_resh, elt->reg, elt->elt, MO_64); @@ -7012,9 +7012,12 @@ static void disas_simd_ext(DisasContext *s, uint32_t= insn) =20 write_vec_element(s, tcg_resl, rd, 0, MO_64); tcg_temp_free_i64(tcg_resl); - write_vec_element(s, tcg_resh, rd, 1, MO_64); - tcg_temp_free_i64(tcg_resh); - clear_vec_high(s, true, rd); + + if (is_q) { + write_vec_element(s, tcg_resh, rd, 1, MO_64); + tcg_temp_free_i64(tcg_resh); + } + clear_vec_high(s, is_q, rd); } =20 /* TBL/TBX @@ -7051,17 +7054,21 @@ static void disas_simd_tb(DisasContext *s, uint32_t= insn) * the input. */ tcg_resl =3D tcg_temp_new_i64(); - tcg_resh =3D tcg_temp_new_i64(); + tcg_resh =3D NULL; =20 if (is_tblx) { read_vec_element(s, tcg_resl, rd, 0, MO_64); } else { tcg_gen_movi_i64(tcg_resl, 0); } - if (is_tblx && is_q) { - read_vec_element(s, tcg_resh, rd, 1, MO_64); - } else { - tcg_gen_movi_i64(tcg_resh, 0); + + if (is_q) { + tcg_resh =3D tcg_temp_new_i64(); + if (is_tblx) { + read_vec_element(s, tcg_resh, rd, 1, MO_64); + } else { + tcg_gen_movi_i64(tcg_resh, 0); + } } =20 tcg_idx =3D tcg_temp_new_i64(); @@ -7081,9 +7088,12 @@ static void disas_simd_tb(DisasContext *s, uint32_t = insn) =20 write_vec_element(s, tcg_resl, rd, 0, MO_64); tcg_temp_free_i64(tcg_resl); - write_vec_element(s, tcg_resh, rd, 1, MO_64); - tcg_temp_free_i64(tcg_resh); - clear_vec_high(s, true, rd); + + if (is_q) { + write_vec_element(s, tcg_resh, rd, 1, MO_64); + tcg_temp_free_i64(tcg_resh); + } + clear_vec_high(s, is_q, rd); } =20 /* ZIP/UZP/TRN @@ -7120,7 +7130,7 @@ static void disas_simd_zip_trn(DisasContext *s, uint3= 2_t insn) } =20 tcg_resl =3D tcg_const_i64(0); - tcg_resh =3D tcg_const_i64(0); + tcg_resh =3D is_q ? tcg_const_i64(0) : NULL; tcg_res =3D tcg_temp_new_i64(); =20 for (i =3D 0; i < elements; i++) { @@ -7171,9 +7181,12 @@ static void disas_simd_zip_trn(DisasContext *s, uint= 32_t insn) =20 write_vec_element(s, tcg_resl, rd, 0, MO_64); tcg_temp_free_i64(tcg_resl); - write_vec_element(s, tcg_resh, rd, 1, MO_64); - tcg_temp_free_i64(tcg_resh); - clear_vec_high(s, true, rd); + + if (is_q) { + write_vec_element(s, tcg_resh, rd, 1, MO_64); + tcg_temp_free_i64(tcg_resh); + } + clear_vec_high(s, is_q, rd); } =20 /* --=20 2.20.1