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([2806:102e:18:70b5:6b63:a06c:99b3:833]) by smtp.gmail.com with ESMTPSA id e16-20020aca2310000000b003436fa2c23bsm4964215oie.7.2022.12.03.17.51.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 03 Dec 2022 17:51:26 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, tstellar@redhat.com, berrange@redhat.com Subject: [PATCH 1/2] util/bufferiszero: Use __attribute__((target)) for avx2/avx512 Date: Sat, 3 Dec 2022 19:51:22 -0600 Message-Id: <20221204015123.362726-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221204015123.362726-1-richard.henderson@linaro.org> References: <20221204015123.362726-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::22d; envelope-from=richard.henderson@linaro.org; helo=mail-oi1-x22d.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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org Use the attribute, which is supported by clang, instead of the #pragma, which is not supported and, for some reason, also not detected by the meson probe, so we fail by -Werror. Signed-off-by: Richard Henderson --- meson.build | 8 ++------ util/bufferiszero.c | 41 ++++++----------------------------------- 2 files changed, 8 insertions(+), 41 deletions(-) diff --git a/meson.build b/meson.build index 5c6b5a1c75..11b873f911 100644 --- a/meson.build +++ b/meson.build @@ -2324,11 +2324,9 @@ config_host_data.set('CONFIG_CPUID_H', have_cpuid_h) config_host_data.set('CONFIG_AVX2_OPT', get_option('avx2') \ .require(have_cpuid_h, error_message: 'cpuid.h not available, cannot enable AVX2') \ .require(cc.links(''' - #pragma GCC push_options - #pragma GCC target("avx2") #include #include - static int bar(void *a) { + static int __attribute__((target("avx2"))) bar(void *a) { __m256i x = *(__m256i *)a; return _mm256_testz_si256(x, x); } @@ -2338,11 +2336,9 @@ config_host_data.set('CONFIG_AVX2_OPT', get_option('avx2') \ config_host_data.set('CONFIG_AVX512F_OPT', get_option('avx512f') \ .require(have_cpuid_h, error_message: 'cpuid.h not available, cannot enable AVX512F') \ .require(cc.links(''' - #pragma GCC push_options - #pragma GCC target("avx512f") #include #include - static int bar(void *a) { + static int __attribute__((target("avx512f"))) bar(void *a) { __m512i x = *(__m512i *)a; return _mm512_test_epi64_mask(x, x); } diff --git a/util/bufferiszero.c b/util/bufferiszero.c index ec3cd4ca15..1790ded7d4 100644 --- a/util/bufferiszero.c +++ b/util/bufferiszero.c @@ -64,18 +64,11 @@ buffer_zero_int(const void *buf, size_t len) } #if defined(CONFIG_AVX512F_OPT) || defined(CONFIG_AVX2_OPT) || defined(__SSE2__) -/* Do not use push_options pragmas unnecessarily, because clang - * does not support them. - */ -#if defined(CONFIG_AVX512F_OPT) || defined(CONFIG_AVX2_OPT) -#pragma GCC push_options -#pragma GCC target("sse2") -#endif -#include +#include /* Note that each of these vectorized functions require len >= 64. */ -static bool +static bool __attribute__((target("sse2"))) buffer_zero_sse2(const void *buf, size_t len) { __m128i t = _mm_loadu_si128(buf); @@ -104,20 +97,9 @@ buffer_zero_sse2(const void *buf, size_t len) return _mm_movemask_epi8(_mm_cmpeq_epi8(t, zero)) == 0xFFFF; } -#if defined(CONFIG_AVX512F_OPT) || defined(CONFIG_AVX2_OPT) -#pragma GCC pop_options -#endif #ifdef CONFIG_AVX2_OPT -/* Note that due to restrictions/bugs wrt __builtin functions in gcc <= 4.8, - * the includes have to be within the corresponding push_options region, and - * therefore the regions themselves have to be ordered with increasing ISA. - */ -#pragma GCC push_options -#pragma GCC target("sse4") -#include - -static bool +static bool __attribute__((target("sse4"))) buffer_zero_sse4(const void *buf, size_t len) { __m128i t = _mm_loadu_si128(buf); @@ -145,12 +127,7 @@ buffer_zero_sse4(const void *buf, size_t len) return _mm_testz_si128(t, t); } -#pragma GCC pop_options -#pragma GCC push_options -#pragma GCC target("avx2") -#include - -static bool +static bool __attribute__((target("avx2"))) buffer_zero_avx2(const void *buf, size_t len) { /* Begin with an unaligned head of 32 bytes. */ @@ -176,15 +153,10 @@ buffer_zero_avx2(const void *buf, size_t len) return _mm256_testz_si256(t, t); } -#pragma GCC pop_options #endif /* CONFIG_AVX2_OPT */ #ifdef CONFIG_AVX512F_OPT -#pragma GCC push_options -#pragma GCC target("avx512f") -#include - -static bool +static bool __attribute__((target("avx512f"))) buffer_zero_avx512(const void *buf, size_t len) { /* Begin with an unaligned head of 64 bytes. */ @@ -210,8 +182,7 @@ buffer_zero_avx512(const void *buf, size_t len) return !_mm512_test_epi64_mask(t, t); } -#pragma GCC pop_options -#endif +#endif /* CONFIG_AVX512F_OPT */ /* Note that for test_buffer_is_zero_next_accel, the most preferred From patchwork Sun Dec 4 01:51:23 2022 Content-Type: text/plain; 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([2806:102e:18:70b5:6b63:a06c:99b3:833]) by smtp.gmail.com with ESMTPSA id e16-20020aca2310000000b003436fa2c23bsm4964215oie.7.2022.12.03.17.51.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 03 Dec 2022 17:51:27 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, tstellar@redhat.com, berrange@redhat.com Subject: [PATCH 2/2] meson: Set avx512f option to auto Date: Sat, 3 Dec 2022 19:51:23 -0600 Message-Id: <20221204015123.362726-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221204015123.362726-1-richard.henderson@linaro.org> References: <20221204015123.362726-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2001:4860:4864:20::2a; envelope-from=richard.henderson@linaro.org; helo=mail-oa1-x2a.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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org I'm not sure why this option wasn't set the same as avx2. Signed-off-by: Richard Henderson --- meson_options.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/meson_options.txt b/meson_options.txt index 4b749ca549..f98ee101e2 100644 --- a/meson_options.txt +++ b/meson_options.txt @@ -102,7 +102,7 @@ option('membarrier', type: 'feature', value: 'disabled', option('avx2', type: 'feature', value: 'auto', description: 'AVX2 optimizations') -option('avx512f', type: 'feature', value: 'disabled', +option('avx512f', type: 'feature', value: 'auto', description: 'AVX512F optimizations') option('keyring', type: 'feature', value: 'auto', description: 'Linux keyring support')