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Fri, 9 Jan 2026 20:09:38 +0200 (EET) MIME-Version: 1.0 To: ffmpeg-devel@ffmpeg.org Date: Fri, 09 Jan 2026 18:09:38 -0000 Message-ID: <176798217890.25.17828040842867030168@4457048688e7> Message-ID-Hash: OGJOMSLRNVL4VUO7AM52MSZI6PIZOWIN X-Message-ID-Hash: OGJOMSLRNVL4VUO7AM52MSZI6PIZOWIN X-MailFrom: code@ffmpeg.org X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] [PR] tests/checkasm: add a fake cpu flag for benchmarking two C functions (PR #21421) List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Zhao Zhili via ffmpeg-devel Cc: Zhao Zhili Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: PR #21421 opened by Zhao Zhili (quink) URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21421 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21421.patch For example, check the flag and set a function for test: if (ff_is_cpu_flags_test) c->bswap_buf = bswap_buf_2; Run the test: ./tests/checkasm/checkasm --test=bswapdsp --bench=bswap_buf bswap_buf_c: 0.5 ( 1.00x) bswap_buf_test: 0.3 ( 2.04x) Signed-off-by: Zhao Zhili >>From 91e1ac15a456f3a2b2a28984c57ad366df28d611 Mon Sep 17 00:00:00 2001 From: Zhao Zhili Date: Sat, 10 Jan 2026 01:03:37 +0800 Subject: [PATCH] tests/checkasm: add a fake cpu flag for benchmarking two C functions For example, check the flag and set a function for test: if (ff_is_cpu_flags_test) c->bswap_buf = bswap_buf_2; Run the test: ./tests/checkasm/checkasm --test=bswapdsp --bench=bswap_buf bswap_buf_c: 0.5 ( 1.00x) bswap_buf_test: 0.3 ( 2.04x) Signed-off-by: Zhao Zhili --- libavutil/cpu_internal.h | 4 ++++ tests/checkasm/checkasm.c | 15 +++++++++++---- 2 files changed, 15 insertions(+), 4 deletions(-) diff --git a/libavutil/cpu_internal.h b/libavutil/cpu_internal.h index 8dca62334a..7f36fecd49 100644 --- a/libavutil/cpu_internal.h +++ b/libavutil/cpu_internal.h @@ -44,6 +44,10 @@ #define CPUEXT_FAST(flags, cpuext) CPUEXT_SUFFIX_FAST(flags, , cpuext) #define CPUEXT_SLOW(flags, cpuext) CPUEXT_SUFFIX_SLOW(flags, , cpuext) +/* Fake CPU flag for testing only */ +#define AV_CPU_FLAG_TEST 0x80000000 +#define ff_is_cpu_flags_test (av_get_cpu_flags() & AV_CPU_FLAG_TEST) + int ff_get_cpu_flags_mips(void); int ff_get_cpu_flags_aarch64(void); int ff_get_cpu_flags_arm(void); diff --git a/tests/checkasm/checkasm.c b/tests/checkasm/checkasm.c index 7dcdaeb2a4..8eb7e366bd 100644 --- a/tests/checkasm/checkasm.c +++ b/tests/checkasm/checkasm.c @@ -60,7 +60,7 @@ #include "checkasm.h" #include "libavutil/avassert.h" #include "libavutil/common.h" -#include "libavutil/cpu.h" +#include "libavutil/cpu_internal.h" #include "libavutil/intfloat.h" #include "libavutil/random_seed.h" @@ -420,6 +420,9 @@ static const struct { #elif ARCH_WASM { "SIMD128", "simd128", AV_CPU_FLAG_SIMD128 }, #endif + + /* Don't put any flag after this one */ + { "TEST", "test", AV_CPU_FLAG_TEST }, { NULL } }; @@ -861,9 +864,13 @@ static void check_cpu_flag(const char *name, int flag) { int old_cpu_flag = state.cpu_flag; - flag |= old_cpu_flag; - av_force_cpu_flags(-1); - state.cpu_flag = flag & av_get_cpu_flags(); + if (flag == AV_CPU_FLAG_TEST) { + state.cpu_flag = flag; + } else { + flag |= old_cpu_flag; + av_force_cpu_flags(-1); + state.cpu_flag = flag & av_get_cpu_flags(); + } av_force_cpu_flags(state.cpu_flag); if (!flag || state.cpu_flag != old_cpu_flag) { -- 2.49.1 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org