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([2602:ae:1598:4c01:35a2:c45d:7485:f488]) by smtp.gmail.com with ESMTPSA id 10-20020a63104a000000b0051806da5cd6sm8926757pgq.60.2023.05.30.12.14.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 May 2023 12:14:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1685474087; x=1688066087; 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=N/k1qWQ9n1nK/LPGBxkHi7oTQfCtAyyOXQtWzeqV16Y=; b=UfR9ostwPmDrSyArGDQajpNfSij1C0FWClArMnp8NbsTKFFyd1YwqofMAKHzmQPwWh dPPgeCzVAd2lOGzRlRiInHfbiETsG3i6csCdWUksL45b6177+srCiK6WJT69Ozrn3Sv5 bk0Q0QIz6kPhLw7C32M+oSEYZuFSZOVCbrkop/R5hOqM9Jj6YViR4M0yPs+MLOBnRt9P fY78SVwEQLKSsYW+55tZJdjQcc8z30a3yJQVABv1zLSo7ksEta3xl995iLV+tTJR4oPL efHYfC9GEeSuAXWLjeqJFwad4AltJiqhWq2tFuMTBXCjR8SFrzFBdcndgxNiq33KGmAb z38w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685474087; x=1688066087; 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=N/k1qWQ9n1nK/LPGBxkHi7oTQfCtAyyOXQtWzeqV16Y=; b=kwOn/Pi62GbyDkSuJjw7LbblZ3sOJ8oDqi9mURquqIICnG+j5z35jrZAKI/CHHvbCP naZFewqUqAvu58SMg6EBQDS86higt984Ypfy/EUp99dTes/EUshKMmgoBnIIzB8NPv+M JBIUHeVYeLVxlXhQWdJp2fFJvst/4m28cCWBWGpTPcFcn1I/W9l8ZF42re/BCaYdp4hX 4s9KQ+8KMSNFEJGw5awT1XLFvQspXmbZdTp8lKwi8UP9sjEdn552D26YS9HipS4MJ0kK 3iWiMhmvJ83+sRkQumQsbYNZCiavof2W6m+enT0miLoR5oQOZFQy5alh0kYlZgTVaZbc sABQ== X-Gm-Message-State: AC+VfDwUITXgfMxBg98mUjOa7ybPir93IGP2nhpGbJ9lhhYQWVRZlLyC JyR/ned7k/RggtP+zEbPaMV0vb+KUoodbSLVdkE= X-Google-Smtp-Source: ACHHUZ7kWeeXsnpJK18PBHLb7d30G3BqYvZ6Ji/9UadIh3p+RSbfU+T7KBvH6itReLUficP81dyggw== X-Received: by 2002:a17:90a:8a0b:b0:256:2590:818 with SMTP id w11-20020a17090a8a0b00b0025625900818mr3528367pjn.33.1685474086883; Tue, 30 May 2023 12:14:46 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Peter Maydell Subject: [PATCH v3 09/20] target/arm: Load/store integer pair with one tcg operation Date: Tue, 30 May 2023 12:14:27 -0700 Message-Id: <20230530191438.411344-10-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230530191438.411344-1-richard.henderson@linaro.org> References: <20230530191438.411344-1-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::1031; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1031.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, T_SCC_BODY_TEXT_LINE=-0.01 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: 1685474166304100003 Content-Type: text/plain; charset="utf-8" This is required for LSE2, where the pair must be treated atomically if it does not cross a 16-byte boundary. But it simplifies the code to do this always. Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- target/arm/tcg/translate-a64.c | 70 ++++++++++++++++++++++++++-------- 1 file changed, 55 insertions(+), 15 deletions(-) diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c index 19f0f20896..40c6adc9cc 100644 --- a/target/arm/tcg/translate-a64.c +++ b/target/arm/tcg/translate-a64.c @@ -2954,26 +2954,66 @@ static void disas_ldst_pair(DisasContext *s, uint32= _t insn) } else { TCGv_i64 tcg_rt =3D cpu_reg(s, rt); TCGv_i64 tcg_rt2 =3D cpu_reg(s, rt2); + MemOp mop =3D size + 1; + + /* + * With LSE2, non-sign-extending pairs are treated atomically if + * aligned, and if unaligned one of the pair will be completely + * within a 16-byte block and that element will be atomic. + * Otherwise each element is separately atomic. + * In all cases, issue one operation with the correct atomicity. + * + * This treats sign-extending loads like zero-extending loads, + * since that reuses the most code below. + */ + if (s->align_mem) { + mop |=3D (size =3D=3D 2 ? MO_ALIGN_4 : MO_ALIGN_8); + } + mop =3D finalize_memop_pair(s, mop); =20 if (is_load) { - TCGv_i64 tmp =3D tcg_temp_new_i64(); + if (size =3D=3D 2) { + int o2 =3D s->be_data =3D=3D MO_LE ? 32 : 0; + int o1 =3D o2 ^ 32; =20 - /* Do not modify tcg_rt before recognizing any exception - * from the second load. - */ - do_gpr_ld(s, tmp, clean_addr, size + is_signed * MO_SIGN, - false, false, 0, false, false); - tcg_gen_addi_i64(clean_addr, clean_addr, 1 << size); - do_gpr_ld(s, tcg_rt2, clean_addr, size + is_signed * MO_SIGN, - false, false, 0, false, false); + tcg_gen_qemu_ld_i64(tcg_rt, clean_addr, get_mem_index(s), = mop); + if (is_signed) { + tcg_gen_sextract_i64(tcg_rt2, tcg_rt, o2, 32); + tcg_gen_sextract_i64(tcg_rt, tcg_rt, o1, 32); + } else { + tcg_gen_extract_i64(tcg_rt2, tcg_rt, o2, 32); + tcg_gen_extract_i64(tcg_rt, tcg_rt, o1, 32); + } + } else { + TCGv_i128 tmp =3D tcg_temp_new_i128(); =20 - tcg_gen_mov_i64(tcg_rt, tmp); + tcg_gen_qemu_ld_i128(tmp, clean_addr, get_mem_index(s), mo= p); + if (s->be_data =3D=3D MO_LE) { + tcg_gen_extr_i128_i64(tcg_rt, tcg_rt2, tmp); + } else { + tcg_gen_extr_i128_i64(tcg_rt2, tcg_rt, tmp); + } + } } else { - do_gpr_st(s, tcg_rt, clean_addr, size, - false, 0, false, false); - tcg_gen_addi_i64(clean_addr, clean_addr, 1 << size); - do_gpr_st(s, tcg_rt2, clean_addr, size, - false, 0, false, false); + if (size =3D=3D 2) { + TCGv_i64 tmp =3D tcg_temp_new_i64(); + + if (s->be_data =3D=3D MO_LE) { + tcg_gen_concat32_i64(tmp, tcg_rt, tcg_rt2); + } else { + tcg_gen_concat32_i64(tmp, tcg_rt2, tcg_rt); + } + tcg_gen_qemu_st_i64(tmp, clean_addr, get_mem_index(s), mop= ); + } else { + TCGv_i128 tmp =3D tcg_temp_new_i128(); + + if (s->be_data =3D=3D MO_LE) { + tcg_gen_concat_i64_i128(tmp, tcg_rt, tcg_rt2); + } else { + tcg_gen_concat_i64_i128(tmp, tcg_rt2, tcg_rt); + } + tcg_gen_qemu_st_i128(tmp, clean_addr, get_mem_index(s), mo= p); + } } } =20 --=20 2.34.1