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[80.41.64.133]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a4f009ff7asm17668852f8f.90.2025.06.03.01.09.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Jun 2025 01:09:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1748938185; x=1749542985; 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=tmwJBz7F0rnN0Jca+1BmXr+MUdOgft8U8n0tUdpppT0=; b=bumZhcOJU5LFKEa1hSdk1sft33jZuSXZRO14nIa/ttMqJcTPF7ADmkJJ5H5eJBcf9b KBHbx94I2Pc0tVl+mMY/2yMOwOfqMNCt/yI2NhhViX25XKQTE6M2nta/3qRbOJ0Xpev5 8GY2gE9j4VLapWohIAtBBC1WaqF6rHvPZ7Qg1eqc32JKNhp4H2CEzQw97j2ocnSuxWXr JjL6r/5jLtX68oK/C1XcnYG88y0YCScpRDzMgDRuQpJeztC//bmC/4+oMmPILmY4k3dn u+EHJEm6R0R5S16ee33QLOV5bjWsdRpdWmnq5x9TJjX2IrBzYnvQZkZFR11dteyCkSLX Ru7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748938185; x=1749542985; 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=tmwJBz7F0rnN0Jca+1BmXr+MUdOgft8U8n0tUdpppT0=; b=e2Hhk15FL72XnPLyk91mOfkXr5wwv9QjMx4yRh5HxeaD/9718Co2czCS3DZdFRqXS+ EoVN6PxdERVrVKydps/m+koAhwQx0DW7JozefoulODxt/RGdKY/tm3WZ3HKnBiTw3sth rEbxxsn/rrlHxl7xWxnaUGQ3eaCe1GT+YNe+8iMdbRAW8mOCzmL71b2k5rOBOrl9P06e FZBl6/JHfsKNH5UCa10riPv67hhQzZ2wKtp3GrjEU1tDTVWwTu86vRImnGnbR1IMORg2 KMorNdxgSeQBrNn6aFqcsl1YHdcYkL35nL1lJDFB1Ii2qgWyNEXnfZPPEIF5J0FZfEi8 nX/A== X-Gm-Message-State: AOJu0YyJVPW70Jsoqw0Sl52XO23JsoF44FmOlIJCxUtEZ1GowuDlJNmQ cBNbxWx4W4sFaWerKGhE2bkljO2wqNSRE1tC3Bg6mbA+3lF6/iLPgbZktogLxtxujdGHdEppirH IU65RENU= X-Gm-Gg: ASbGncvCo82AMviF0N5Q4tGwBbxkG5JE8jbICKr6+whqCpRW2sIcpJIoksUJnU8KOyk dHPm7eTEHGf0+q4tFFD+Dk5Uopj6/0ygiK2wh/2g6BQnTFPoNDXConeKcgW5oC4o/ituFsu2t94 SuFEmXr2gMJtHcBTVHPO0hr3uAKoymzLdOuINkY1V/GajLf5+SaaUksTgrrbf3IivnH7I4R/duF /DOrR9lDnFxSCeoSsask/Zqzcm/luTIe850IUT4OUsjS8vQ8ZYqX/Y6WOTX4IJM2LvgKxN60dhw lBlngEp3KXnP1DzETMPPE69yoHPx4wQORFRtXk6JLpvaOG9M657pbjBEWMoO1F0BpLoWj5SprEn xmU2fe/LBXnFDJY0CzvqJHIM= X-Google-Smtp-Source: AGHT+IGXdGZhG3OTg8NTlcYpINTkohVkCXzUvv7flMMP10DUMYgD0oxVD6sgMtpjuRCoreKrsO9Iww== X-Received: by 2002:a05:6000:2c0f:b0:3a4:e6e7:3acd with SMTP id ffacd0b85a97d-3a4fe16a68cmr8965081f8f.18.1748938184722; Tue, 03 Jun 2025 01:09:44 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com Subject: [PATCH v2 03/27] tcg/optimize: Introduce fold_masks_zosa Date: Tue, 3 Jun 2025 09:08:44 +0100 Message-ID: <20250603080908.559594-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250603080908.559594-1-richard.henderson@linaro.org> References: <20250603080908.559594-1-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=2a00:1450:4864:20::430; envelope-from=richard.henderson@linaro.org; helo=mail-wr1-x430.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: 1748938220740116600 Content-Type: text/plain; charset="utf-8" Add a new function with an affected mask. This will allow folding to a constant to happen before folding to a copy, without having to mind the ordering in all users. Signed-off-by: Richard Henderson Reviewed-by: Pierrick Bouvier --- tcg/optimize.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index ce3cb4d7bc..49ef039932 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -1039,8 +1039,8 @@ static bool fold_const2_commutative(OptContext *ctx, = TCGOp *op) * If z_mask allows, fold the output to constant zero. * The passed s_mask may be augmented by z_mask. */ -static bool fold_masks_zos(OptContext *ctx, TCGOp *op, uint64_t z_mask, - uint64_t o_mask, int64_t s_mask) +static bool fold_masks_zosa(OptContext *ctx, TCGOp *op, uint64_t z_mask, + uint64_t o_mask, int64_t s_mask, uint64_t a_ma= sk) { const TCGOpDef *def =3D &tcg_op_defs[op->opc]; TCGTemp *ts; @@ -1061,6 +1061,7 @@ static bool fold_masks_zos(OptContext *ctx, TCGOp *op= , uint64_t z_mask, z_mask =3D (int32_t)z_mask; o_mask =3D (int32_t)o_mask; s_mask |=3D INT32_MIN; + a_mask =3D (uint32_t)a_mask; } =20 /* Bits that are known 1 and bits that are known 0 must not overlap. */ @@ -1071,6 +1072,11 @@ static bool fold_masks_zos(OptContext *ctx, TCGOp *o= p, uint64_t z_mask, return tcg_opt_gen_movi(ctx, op, op->args[0], o_mask); } =20 + /* If no bits are affected, the operation devolves to a copy. */ + if (a_mask =3D=3D 0) { + return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[1]); + } + ts =3D arg_temp(op->args[0]); reset_ts(ctx, ts); =20 @@ -1090,17 +1096,17 @@ static bool fold_masks_zos(OptContext *ctx, TCGOp *= op, uint64_t z_mask, static bool fold_masks_zs(OptContext *ctx, TCGOp *op, uint64_t z_mask, uint64_t s_mask) { - return fold_masks_zos(ctx, op, z_mask, 0, s_mask); + return fold_masks_zosa(ctx, op, z_mask, 0, s_mask, -1); } =20 static bool fold_masks_z(OptContext *ctx, TCGOp *op, uint64_t z_mask) { - return fold_masks_zos(ctx, op, z_mask, 0, 0); + return fold_masks_zosa(ctx, op, z_mask, 0, 0, -1); } =20 static bool fold_masks_s(OptContext *ctx, TCGOp *op, uint64_t s_mask) { - return fold_masks_zos(ctx, op, -1, 0, s_mask); + return fold_masks_zosa(ctx, op, -1, 0, s_mask, -1); } =20 /* --=20 2.43.0