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([203.56.140.20]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7127af1888esm9210774b3a.149.2024.08.20.19.26.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Aug 2024 19:26:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1724207163; x=1724811963; 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=MzQq+okHryK0atM5VhMyw1ZWBZUUJZorcvwNEKWon4U=; b=yNxWZUbhGeas6gyHp9lmNoqadOLSd0jXjoQd+Qp9yN0jRXgEau80K6Sxikrq4yEpRJ IIooa1Lxa3ytceqDu8cxxCfzI5YziO2nuIYKqHmSFO6NK+wW9wq7cwnAoY1yaxfpDfFd 0qbrvLac7HrTyDNz4DKhUQbgF+Z7ALtuiJrfbI1mrh+dUuX/7vhHWJs3971RkPzJcwqj 9ILUHdleqMbAhu0/2gSjt8G4djKi3CKdmSO+2RPqvLexaC/lqCvo40zZBzPT4GEShvec x4E8KaB82q4QLrs4iOJUI64qW5fKsQqTkmMh4K4CffBbfgaunVpTBV5h39ul6FZVYMAO kG3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724207163; x=1724811963; 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=MzQq+okHryK0atM5VhMyw1ZWBZUUJZorcvwNEKWon4U=; b=wJ1tAaWWk3150KMV2ms0Xmy2xIcZasyGK8hEPTtOIA8Fmk+u8WEiwmdtv5MocvyvfL O/PwPc3vwTDtdxeSS9BCqAkZTX65fUIjBVYE/mEatggxX1w9NoxfThXom3Bf5+qprELk H4AwhkHoHsqPvxBKQ7pBdwaA1mL+pdPHZf/nLXXhSOznCSmmf/kEk5NfKnFZqsc617qa U5iqeEYtuwGgML488Af0CUN6JwwOPRNTbjhB9We7lgtkcYtQ2fPJan+rG8a+m7sjKE2P CxUljoHluOlwEk7tWgQjO6GCMMNyoKwK3xQNF63hpqJvZe9uqEhhQuMKFKtWSvbLuv9n as7Q== X-Gm-Message-State: AOJu0YzfgkIPmXhu1mW6SEV5vlXVA1zrIjhTrtnC+YxrfDJFjMZ8T5hz mcn2tg+SL8spi/LVk8L+Pu4iK1TdepuxaYy+nwraagi8DLQiWekuuM1dg0gWzNNa7JVs+Ujb2IY 7ZtE= X-Google-Smtp-Source: AGHT+IEhf6mfNsGUhGyQG356To4ct+NPhJHgeeBstI8HsvX1KGLMn27A02ToUTILb3vxqG8tznFAfw== X-Received: by 2002:a05:6808:1491:b0:3d9:2def:21b4 with SMTP id 5614622812f47-3de19526360mr1667062b6e.14.1724207163495; Tue, 20 Aug 2024 19:26:03 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PULL 4/5] target/i386: Fix carry flag for BLSI Date: Wed, 21 Aug 2024 12:25:47 +1000 Message-ID: <20240821022548.421745-5-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240821022548.421745-1-richard.henderson@linaro.org> References: <20240821022548.421745-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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::233; envelope-from=richard.henderson@linaro.org; helo=mail-oi1-x233.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: 1724207191321116600 BLSI has inverted semantics for C as compared to the other two BMI1 instructions, BLSMSK and BLSR. Introduce CC_OP_BLSI* for this purpose. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2175 Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 Message-Id: <20240801075845.573075-3-richard.henderson@linaro.org> --- target/i386/cpu.h | 5 +++++ target/i386/tcg/cc_helper.c | 18 ++++++++++++++++++ target/i386/tcg/translate.c | 5 +++++ tests/tcg/x86_64/test-2175.c | 24 ++++++++++++++++++++++++ target/i386/tcg/cc_helper_template.h.inc | 18 ++++++++++++++++++ target/i386/tcg/emit.c.inc | 2 +- tests/tcg/x86_64/Makefile.target | 1 + 7 files changed, 72 insertions(+), 1 deletion(-) create mode 100644 tests/tcg/x86_64/test-2175.c diff --git a/target/i386/cpu.h b/target/i386/cpu.h index c6cc035df3..14edd57a37 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1339,6 +1339,11 @@ typedef enum { CC_OP_BMILGL, CC_OP_BMILGQ, =20 + CC_OP_BLSIB, /* Z,S via CC_DST, C =3D SRC!=3D0; O=3D0; P,A undefined */ + CC_OP_BLSIW, + CC_OP_BLSIL, + CC_OP_BLSIQ, + /* * Note that only CC_OP_POPCNT (i.e. the one with MO_TL size) * is used or implemented, because the translation needs diff --git a/target/i386/tcg/cc_helper.c b/target/i386/tcg/cc_helper.c index 301ed95406..dbddaa2fcb 100644 --- a/target/i386/tcg/cc_helper.c +++ b/target/i386/tcg/cc_helper.c @@ -186,6 +186,13 @@ target_ulong helper_cc_compute_all(target_ulong dst, t= arget_ulong src1, case CC_OP_BMILGL: return compute_all_bmilgl(dst, src1); =20 + case CC_OP_BLSIB: + return compute_all_blsib(dst, src1); + case CC_OP_BLSIW: + return compute_all_blsiw(dst, src1); + case CC_OP_BLSIL: + return compute_all_blsil(dst, src1); + case CC_OP_ADCX: return compute_all_adcx(dst, src1, src2); case CC_OP_ADOX: @@ -216,6 +223,8 @@ target_ulong helper_cc_compute_all(target_ulong dst, ta= rget_ulong src1, return compute_all_sarq(dst, src1); case CC_OP_BMILGQ: return compute_all_bmilgq(dst, src1); + case CC_OP_BLSIQ: + return compute_all_blsiq(dst, src1); #endif } } @@ -308,6 +317,13 @@ target_ulong helper_cc_compute_c(target_ulong dst, tar= get_ulong src1, case CC_OP_BMILGL: return compute_c_bmilgl(dst, src1); =20 + case CC_OP_BLSIB: + return compute_c_blsib(dst, src1); + case CC_OP_BLSIW: + return compute_c_blsiw(dst, src1); + case CC_OP_BLSIL: + return compute_c_blsil(dst, src1); + #ifdef TARGET_X86_64 case CC_OP_ADDQ: return compute_c_addq(dst, src1); @@ -321,6 +337,8 @@ target_ulong helper_cc_compute_c(target_ulong dst, targ= et_ulong src1, return compute_c_shlq(dst, src1); case CC_OP_BMILGQ: return compute_c_bmilgq(dst, src1); + case CC_OP_BLSIQ: + return compute_c_blsiq(dst, src1); #endif } } diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index 4af282e626..98f5fe61ed 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -304,6 +304,7 @@ static const uint8_t cc_op_live[CC_OP_NB] =3D { [CC_OP_SHLB ... CC_OP_SHLQ] =3D USES_CC_DST | USES_CC_SRC, [CC_OP_SARB ... CC_OP_SARQ] =3D USES_CC_DST | USES_CC_SRC, [CC_OP_BMILGB ... CC_OP_BMILGQ] =3D USES_CC_DST | USES_CC_SRC, + [CC_OP_BLSIB ... CC_OP_BLSIQ] =3D USES_CC_DST | USES_CC_SRC, [CC_OP_ADCX] =3D USES_CC_DST | USES_CC_SRC, [CC_OP_ADOX] =3D USES_CC_SRC | USES_CC_SRC2, [CC_OP_ADCOX] =3D USES_CC_DST | USES_CC_SRC | USES_CC_SRC2, @@ -922,6 +923,10 @@ static CCPrepare gen_prepare_eflags_c(DisasContext *s,= TCGv reg) size =3D s->cc_op - CC_OP_BMILGB; return gen_prepare_val_nz(cpu_cc_src, size, true); =20 + case CC_OP_BLSIB ... CC_OP_BLSIQ: + size =3D s->cc_op - CC_OP_BLSIB; + return gen_prepare_val_nz(cpu_cc_src, size, false); + case CC_OP_ADCX: case CC_OP_ADCOX: return (CCPrepare) { .cond =3D TCG_COND_NE, .reg =3D cpu_cc_dst, diff --git a/tests/tcg/x86_64/test-2175.c b/tests/tcg/x86_64/test-2175.c new file mode 100644 index 0000000000..aafd037bce --- /dev/null +++ b/tests/tcg/x86_64/test-2175.c @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* See https://gitlab.com/qemu-project/qemu/-/issues/2185 */ + +#include + +int test_setc(unsigned int x, unsigned int y) +{ + asm("blsi %1, %0; setc %b0" : "+r"(x) : "r"(y)); + return (unsigned char)x; +} + +int test_pushf(unsigned int x, unsigned int y) +{ + asm("blsi %1, %0; pushf; pop %q0" : "+r"(x) : "r"(y)); + return x & 1; +} + +int main() +{ + assert(test_setc(1, 0xedbf530a)); + assert(test_pushf(1, 0xedbf530a)); + return 0; +} + diff --git a/target/i386/tcg/cc_helper_template.h.inc b/target/i386/tcg/cc_= helper_template.h.inc index bb611feb04..c5425e57cf 100644 --- a/target/i386/tcg/cc_helper_template.h.inc +++ b/target/i386/tcg/cc_helper_template.h.inc @@ -235,6 +235,24 @@ static int glue(compute_c_bmilg, SUFFIX)(DATA_TYPE dst= , DATA_TYPE src1) return src1 =3D=3D 0; } =20 +static int glue(compute_all_blsi, SUFFIX)(DATA_TYPE dst, DATA_TYPE src1) +{ + int cf, pf, af, zf, sf, of; + + cf =3D (src1 !=3D 0); + pf =3D 0; /* undefined */ + af =3D 0; /* undefined */ + zf =3D (dst =3D=3D 0) * CC_Z; + sf =3D lshift(dst, 8 - DATA_BITS) & CC_S; + of =3D 0; + return cf | pf | af | zf | sf | of; +} + +static int glue(compute_c_blsi, SUFFIX)(DATA_TYPE dst, DATA_TYPE src1) +{ + return src1 !=3D 0; +} + #undef DATA_BITS #undef SIGN_MASK #undef DATA_TYPE diff --git a/target/i386/tcg/emit.c.inc b/target/i386/tcg/emit.c.inc index 22a06897fb..9b50419918 100644 --- a/target/i386/tcg/emit.c.inc +++ b/target/i386/tcg/emit.c.inc @@ -1304,7 +1304,7 @@ static void gen_BLSI(DisasContext *s, X86DecodedInsn = *decode) /* input in T1, which is ready for prepare_update2_cc */ tcg_gen_neg_tl(s->T0, s->T1); tcg_gen_and_tl(s->T0, s->T0, s->T1); - prepare_update2_cc(decode, s, CC_OP_BMILGB + ot); + prepare_update2_cc(decode, s, CC_OP_BLSIB + ot); } =20 static void gen_BLSMSK(DisasContext *s, X86DecodedInsn *decode) diff --git a/tests/tcg/x86_64/Makefile.target b/tests/tcg/x86_64/Makefile.t= arget index eda9bd7396..783ab5b21a 100644 --- a/tests/tcg/x86_64/Makefile.target +++ b/tests/tcg/x86_64/Makefile.target @@ -16,6 +16,7 @@ X86_64_TESTS +=3D noexec X86_64_TESTS +=3D cmpxchg X86_64_TESTS +=3D adox X86_64_TESTS +=3D test-1648 +X86_64_TESTS +=3D test-2175 TESTS=3D$(MULTIARCH_TESTS) $(X86_64_TESTS) test-x86_64 else TESTS=3D$(MULTIARCH_TESTS) --=20 2.43.0