From nobody Tue Feb 10 07:44:17 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1629322374; cv=none; d=zohomail.com; s=zohoarc; b=JkaTm6Q/OaeOuFJc2NsJbz040SGQHG3L6B9BgeXSWDslaWbnqVGtl3EmJWYPor06OUOq8POkTiNScxNY7CD9vKQUM9niXk+0YjFyGSSVlgrjSPLTbncYdsowHCTZYzTRCE0ZgV7Eja2xWGmADpqMubhwqYm6Yyo0GBqC2uTc99o= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1629322374; h=Content-Transfer-Encoding:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=s5r7qpgniveSM3WnTFZrHgwHVXy2cCAVB+CqYnFl+i0=; b=HRbX48BFL62HFmJ/gg7B6gWiEriCCdN0ngWVqlPpSAgsOhYDCMqhcgTXqzIOCrdm8nRFq34+ykX5PrLHBCHVg6vpwY6UnHEW4xyQsKfGtNh73LXDoS0lcMh2GWLWnFTEHS9wNzMdQdbh07nt3Fhi2XnIK2va1eJKUvdO7KBBjqo= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1629322374854610.0963445347064; Wed, 18 Aug 2021 14:32:54 -0700 (PDT) Received: from localhost ([::1]:48394 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mGTB7-0002RW-M2 for importer@patchew.org; Wed, 18 Aug 2021 17:32:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57346) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mGT7q-0006DE-Qu for qemu-devel@nongnu.org; Wed, 18 Aug 2021 17:29:30 -0400 Received: from mail-pl1-x62c.google.com ([2607:f8b0:4864:20::62c]:43000) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mGT7o-0005pQ-SW for qemu-devel@nongnu.org; Wed, 18 Aug 2021 17:29:30 -0400 Received: by mail-pl1-x62c.google.com with SMTP id w6so2648453plg.9 for ; Wed, 18 Aug 2021 14:29:28 -0700 (PDT) Received: from localhost.localdomain ([173.197.107.15]) by smtp.gmail.com with ESMTPSA id y19sm751965pfe.71.2021.08.18.14.29.27 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Aug 2021 14:29:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=s5r7qpgniveSM3WnTFZrHgwHVXy2cCAVB+CqYnFl+i0=; b=fk1Wn10sX9NfJfmq/7NwvLCRzkhW0M1EIIPKwPaKAnCM1r9Gk7yg/CI7Ro1/tkxT8O SBlHg7zlaR2Qr1hOEe7cOkTiL43jDgtncqNIas0MfgEj0h9A//zq4y5gw+qrgRhFFVuT af1tl0jeC3maK1qC0NFPWCFBiH7nXpHBkDl2VyGJOTxqq0BZU1s2Wv6gMuSqY6XiaB5g 8+oZfSySIj5UBs4BJs8zv+fZJtu9pdhz00rRjUWBCvKpCPKnDXefaFLIUxfZpuC9JMLx 0ayk0Mhnkr9SgQz9vAOQqdYpE0sRNy33PdOl89xfPrM3Dw2nhoNJV4MwsBcBCD99wKRQ 5gFA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=s5r7qpgniveSM3WnTFZrHgwHVXy2cCAVB+CqYnFl+i0=; b=VtDpNPQPc6dV6SndF60Ama+NkBbtcpKZuaLteczDxxiG/dACxGpTZxbm05eN1ohuZ1 f0+ySnEGQCcleDcuu48UxmS870BRGZTdTipixq15Sx3agZnoB4w5T+lHgXAnSBl5zQtU lM5HPU6AFjFx4o9p3NLWVpOEWspEl/voNrhnGAAVnCRYZGnWnzgLUm+JAfa9vHjI7Yy4 dVQy7c3dOcTt8IF0AasSc1BVcMg/HJSIxCweIh0QQrqmtkGsqlL++SFBnPBr65pZhslz cKhegdYCnsLCan/oqTc7gEh2P2q5nMIOFfRkr7cTdi//sOoWVwFNZOpcizYEatsEXX6N a0SA== X-Gm-Message-State: AOAM533LlkLVHd7BD0ZSLeeWh9JUOKzvC+vNFV+sZK+oikA4An7o5+ky 8WWAv7+DDf8kUwb5kmxVzLm1exYQCNHRrw== X-Google-Smtp-Source: ABdhPJz3UPwcuUAuPG+hOaUt3FQPc2FYot3nCejkI5j2Gs6KxmE8S/w+jRGnKDN3vjjdfr5ojae7aw== X-Received: by 2002:a17:90b:4b4d:: with SMTP id mi13mr11877540pjb.20.1629322167640; Wed, 18 Aug 2021 14:29:27 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v3 13/14] tcg/arm: Reserve a register for guest_base Date: Wed, 18 Aug 2021 11:29:11 -1000 Message-Id: <20210818212912.396794-14-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210818212912.396794-1-richard.henderson@linaro.org> References: <20210818212912.396794-1-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::62c; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62c.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: 2.1.23 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: pass (identity @linaro.org) X-ZM-MESSAGEID: 1629322375906100001 Content-Type: text/plain; charset="utf-8" Reserve a register for the guest_base using aarch64 for reference. By doing so, we do not have to recompute it for every memory load. Signed-off-by: Richard Henderson --- tcg/arm/tcg-target.c.inc | 39 ++++++++++++++++++++++++++++----------- 1 file changed, 28 insertions(+), 11 deletions(-) diff --git a/tcg/arm/tcg-target.c.inc b/tcg/arm/tcg-target.c.inc index 35bd4c68d6..2728035177 100644 --- a/tcg/arm/tcg-target.c.inc +++ b/tcg/arm/tcg-target.c.inc @@ -84,6 +84,9 @@ static const int tcg_target_call_oarg_regs[2] =3D { =20 #define TCG_REG_TMP TCG_REG_R12 #define TCG_VEC_TMP TCG_REG_Q15 +#ifndef CONFIG_SOFTMMU +#define TCG_REG_GUEST_BASE TCG_REG_R11 +#endif =20 typedef enum { COND_EQ =3D 0x0, @@ -1763,7 +1766,8 @@ static bool tcg_out_qemu_st_slow_path(TCGContext *s, = TCGLabelQemuLdst *lb) =20 static void tcg_out_qemu_ld_index(TCGContext *s, MemOp opc, TCGReg datalo, TCGReg datahi, - TCGReg addrlo, TCGReg addend) + TCGReg addrlo, TCGReg addend, + bool scratch_addend) { /* Byte swapping is left to middle-end expansion. */ tcg_debug_assert((opc & MO_BSWAP) =3D=3D 0); @@ -1790,7 +1794,7 @@ static void tcg_out_qemu_ld_index(TCGContext *s, MemO= p opc, && get_alignment_bits(opc) >=3D MO_64 && (datalo & 1) =3D=3D 0 && datahi =3D=3D datalo + 1) { tcg_out_ldrd_r(s, COND_AL, datalo, addrlo, addend); - } else if (datalo !=3D addend) { + } else if (scratch_addend) { tcg_out_ld32_rwb(s, COND_AL, datalo, addend, addrlo); tcg_out_ld32_12(s, COND_AL, datahi, addend, 4); } else { @@ -1875,14 +1879,14 @@ static void tcg_out_qemu_ld(TCGContext *s, const TC= GArg *args, bool is64) label_ptr =3D s->code_ptr; tcg_out_bl_imm(s, COND_NE, 0); =20 - tcg_out_qemu_ld_index(s, opc, datalo, datahi, addrlo, addend); + tcg_out_qemu_ld_index(s, opc, datalo, datahi, addrlo, addend, true); =20 add_qemu_ldst_label(s, true, oi, datalo, datahi, addrlo, addrhi, s->code_ptr, label_ptr); #else /* !CONFIG_SOFTMMU */ if (guest_base) { - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP, guest_base); - tcg_out_qemu_ld_index(s, opc, datalo, datahi, addrlo, TCG_REG_TMP); + tcg_out_qemu_ld_index(s, opc, datalo, datahi, + addrlo, TCG_REG_GUEST_BASE, false); } else { tcg_out_qemu_ld_direct(s, opc, datalo, datahi, addrlo); } @@ -1891,7 +1895,8 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGA= rg *args, bool is64) =20 static void tcg_out_qemu_st_index(TCGContext *s, ARMCond cond, MemOp opc, TCGReg datalo, TCGReg datahi, - TCGReg addrlo, TCGReg addend) + TCGReg addrlo, TCGReg addend, + bool scratch_addend) { /* Byte swapping is left to middle-end expansion. */ tcg_debug_assert((opc & MO_BSWAP) =3D=3D 0); @@ -1912,9 +1917,14 @@ static void tcg_out_qemu_st_index(TCGContext *s, ARM= Cond cond, MemOp opc, && get_alignment_bits(opc) >=3D MO_64 && (datalo & 1) =3D=3D 0 && datahi =3D=3D datalo + 1) { tcg_out_strd_r(s, cond, datalo, addrlo, addend); - } else { + } else if (scratch_addend) { tcg_out_st32_rwb(s, cond, datalo, addend, addrlo); tcg_out_st32_12(s, cond, datahi, addend, 4); + } else { + tcg_out_dat_reg(s, cond, ARITH_ADD, TCG_REG_TMP, + addend, addrlo, SHIFT_IMM_LSL(0)); + tcg_out_st32_12(s, cond, datalo, TCG_REG_TMP, 0); + tcg_out_st32_12(s, cond, datahi, TCG_REG_TMP, 4); } break; default: @@ -1978,7 +1988,8 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGA= rg *args, bool is64) mem_index =3D get_mmuidx(oi); addend =3D tcg_out_tlb_read(s, addrlo, addrhi, opc, mem_index, 0); =20 - tcg_out_qemu_st_index(s, COND_EQ, opc, datalo, datahi, addrlo, addend); + tcg_out_qemu_st_index(s, COND_EQ, opc, datalo, datahi, + addrlo, addend, true); =20 /* The conditional call must come last, as we're going to return here.= */ label_ptr =3D s->code_ptr; @@ -1988,9 +1999,8 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGA= rg *args, bool is64) s->code_ptr, label_ptr); #else /* !CONFIG_SOFTMMU */ if (guest_base) { - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP, guest_base); - tcg_out_qemu_st_index(s, COND_AL, opc, datalo, - datahi, addrlo, TCG_REG_TMP); + tcg_out_qemu_st_index(s, COND_AL, opc, datalo, datahi, + addrlo, TCG_REG_GUEST_BASE, false); } else { tcg_out_qemu_st_direct(s, opc, datalo, datahi, addrlo); } @@ -3153,6 +3163,13 @@ static void tcg_target_qemu_prologue(TCGContext *s) =20 tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); =20 +#ifndef CONFIG_SOFTMMU + if (guest_base) { + tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_GUEST_BASE, guest_base); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_GUEST_BASE); + } +#endif + tcg_out_b_reg(s, COND_AL, tcg_target_call_iarg_regs[1]); =20 /* --=20 2.25.1