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[174.21.81.121]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2dadbfe46d4sm4084019a91.1.2024.09.07.19.26.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Sep 2024 19:26:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1725762404; x=1726367204; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=IPQ3Iuu/LAmgLlUZXWZGZIzBg2biU/xcO4whzf7Rmmg=; b=lHxtc0Lhyjea3wX5WTWZFzwz+eUo4PMaZSxZIBhmCAZOdxLCogbeHgRfVNPClF+nDF utiYWcC58SzAyroMVr8Xn5xmNwlf84HLt/5oFH0ck6wfEP3UVNeq7F3pLOPzGfbWJvgE 5e0DNTI6DdNZKo1bOLPTXzRzEhQqLgfAipiuOU9BIv++Q7XKoqhIZpTnSSow46PwibJ2 LSQGhl1ToDXJdv+YUAKRRzHjzc7iofw5hnq/iTLNSrqoKiz5JfbKNWQT8mE0dbJPAdeQ P94d7OatxumK/xQ4o0SZpfrqQEjVJuzM6i7eLzDQNnwKvj8UbB4vg7matbryuYb1KLLb knBQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725762404; x=1726367204; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=IPQ3Iuu/LAmgLlUZXWZGZIzBg2biU/xcO4whzf7Rmmg=; b=bMZsYFcAboAt+mFDWNq8J3Uk34kOxhG3tnLxpoteYd12A01kUrM/b9vO1opYSyDyc9 e/ifdU+R2ztvFjsbgaybsGrITdyrZRNayblDZtDPqlHOZciG1PPw+Y24CPEioNlirqiA JjYr+CZblbG0O4bNRmudvtUA2Z0PSg6aHHxZnmalv9eT8nOR6xWgJVAJvpIZuKl2+IQ1 1C6drBEQfjEzc2qDOpHaWSAWxLT3G9caaXJ3vKezax4d1qHZSAL8cM6UYmQ3uS95DK94 6ZVc6ojzvMm87QInL0SUs1LHkALgPuTN0SHp7ZJdnr1UxSpIYYiQ4oizGmUpuSki3iNd ofAw== X-Gm-Message-State: AOJu0YzhGYmXvyWjf3w2WTyjXs06QpiEC8CG1w4/cdn/oEG/GUfZyZ7v 9Sf1z/vSVAIq2A+GcefVqApE6b+5eBTaJPfkIhDblEtT1aZqw2v0vPnyvblTyIQIW7zFbiztbyK g X-Google-Smtp-Source: AGHT+IGBMUF8+1spcbwix1npOokfkEHzRs+BF18asiWY4gbuwbckJJbZT4hfWLtTMgXNGVIp2cozgw== X-Received: by 2002:a17:90b:4a0b:b0:2d3:d414:4511 with SMTP id 98e67ed59e1d1-2dad5022bc3mr9002725a91.24.1725762404137; Sat, 07 Sep 2024 19:26:44 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: zhiwei_liu@linux.alibaba.com, tangtiancheng.ttc@alibaba-inc.com, liwei1518@gmail.com, bmeng.cn@gmail.com Subject: [PATCH 09/12] tcg/i386: Optimize cmpsel with constant 0 arguments Date: Sat, 7 Sep 2024 19:26:29 -0700 Message-ID: <20240908022632.459477-10-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240908022632.459477-1-richard.henderson@linaro.org> References: <20240908022632.459477-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1030; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1030.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 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-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1725762496388116600 Content-Type: text/plain; charset="utf-8" These can be simplified to and/andc, avoiding the load of the zero into a register. Signed-off-by: Richard Henderson --- tcg/i386/tcg-target-con-set.h | 2 +- tcg/i386/tcg-target-con-str.h | 1 + tcg/i386/tcg-target.c.inc | 26 +++++++++++++++++++++++--- 3 files changed, 25 insertions(+), 4 deletions(-) diff --git a/tcg/i386/tcg-target-con-set.h b/tcg/i386/tcg-target-con-set.h index da4411d96b..a9ff245c42 100644 --- a/tcg/i386/tcg-target-con-set.h +++ b/tcg/i386/tcg-target-con-set.h @@ -50,7 +50,7 @@ C_N1_I2(r, r, r) C_N1_I2(r, r, rW) C_O1_I3(x, 0, x, x) C_O1_I3(x, x, x, x) -C_O1_I4(x, x, x, x, x) +C_O1_I4(x, x, x, xO, xO) C_O1_I4(r, r, reT, r, 0) C_O1_I4(r, r, r, ri, ri) C_O2_I1(r, r, L) diff --git a/tcg/i386/tcg-target-con-str.h b/tcg/i386/tcg-target-con-str.h index cc22db227b..52142ab121 100644 --- a/tcg/i386/tcg-target-con-str.h +++ b/tcg/i386/tcg-target-con-str.h @@ -28,6 +28,7 @@ REGS('s', ALL_BYTEL_REGS & ~SOFTMMU_RESERVE_REGS) /* q= emu_st8_i32 data */ */ CONST('e', TCG_CT_CONST_S32) CONST('I', TCG_CT_CONST_I32) +CONST('O', TCG_CT_CONST_ZERO) CONST('T', TCG_CT_CONST_TST) CONST('W', TCG_CT_CONST_WSZ) CONST('Z', TCG_CT_CONST_U32) diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc index a04dc7d270..c63c3faed8 100644 --- a/tcg/i386/tcg-target.c.inc +++ b/tcg/i386/tcg-target.c.inc @@ -133,6 +133,7 @@ static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKin= d kind, int slot) #define TCG_CT_CONST_I32 0x400 #define TCG_CT_CONST_WSZ 0x800 #define TCG_CT_CONST_TST 0x1000 +#define TCG_CT_CONST_ZERO 0x2000 =20 /* Registers used with L constraint, which are the first argument registers on x86_64, and two random call clobbered registers on @@ -226,6 +227,9 @@ static bool tcg_target_const_match(int64_t val, int ct, if ((ct & TCG_CT_CONST_WSZ) && val =3D=3D (type =3D=3D TCG_TYPE_I32 ? = 32 : 64)) { return 1; } + if ((ct & TCG_CT_CONST_ZERO) && val =3D=3D 0) { + return 1; + } return 0; } =20 @@ -3119,13 +3123,29 @@ static void tcg_out_cmpsel_vec(TCGContext *s, TCGTy= pe type, unsigned vece, TCGReg v0, TCGReg c1, TCGReg c2, TCGReg v3, TCGReg v4, TCGCond cond) { + /* + * Since XMM0 is 16, the only way we get 0 into V3 and V4 + * is via the constant zero constraint. + */ + if (!v3 && !v4) { + tcg_out_dupi_vec(s, type, vece, v0, 0); + return; + } + if (tcg_out_cmp_vec_noinv(s, type, vece, TCG_TMP_VEC, c1, c2, cond)) { TCGReg swap =3D v3; v3 =3D v4; v4 =3D swap; } - tcg_out_vex_modrm_type(s, OPC_VPBLENDVB, v0, v4, v3, type); - tcg_out8(s, (TCG_TMP_VEC - TCG_REG_XMM0) << 4); + + if (!v3) { + tcg_out_vex_modrm_type(s, OPC_PANDN, v0, TCG_TMP_VEC, v4, type); + } else if (!v4) { + tcg_out_vex_modrm_type(s, OPC_PAND, v0, TCG_TMP_VEC, v3, type); + } else { + tcg_out_vex_modrm_type(s, OPC_VPBLENDVB, v0, v4, v3, type); + tcg_out8(s, (TCG_TMP_VEC - TCG_REG_XMM0) << 4); + } } =20 static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc, @@ -3716,7 +3736,7 @@ static TCGConstraintSetIndex tcg_target_op_def(TCGOpc= ode op) case INDEX_op_bitsel_vec: return C_O1_I3(x, x, x, x); case INDEX_op_cmpsel_vec: - return C_O1_I4(x, x, x, x, x); + return C_O1_I4(x, x, x, xO, xO); =20 default: g_assert_not_reached(); --=20 2.43.0