From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id D19D246554 for ; Tue, 20 Jun 2023 14:59:43 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id C93B268BF63; Tue, 20 Jun 2023 17:59:40 +0300 (EEST) Received: from ursule.remlab.net (vps-a2bccee9.vps.ovh.net [51.75.19.47]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 605FB68B9AB for ; Tue, 20 Jun 2023 17:59:34 +0300 (EEST) Received: from basile.remlab.net (localhost [IPv6:::1]) by ursule.remlab.net (Postfix) with ESMTP id C49B8C01D5 for ; Tue, 20 Jun 2023 17:59:33 +0300 (EEST) From: =?UTF-8?q?R=C3=A9mi=20Denis-Courmont?= To: ffmpeg-devel@ffmpeg.org Date: Tue, 20 Jun 2023 17:59:33 +0300 Message-Id: <20230620145933.20966-1-remi@remlab.net> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH] DRAFT: riscv: add Linux riscv_hwprobe() X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: --- configure | 2 ++ libavutil/riscv/cpu.c | 54 ++++++++++++++++++++++++++++++++----------- 2 files changed, 43 insertions(+), 13 deletions(-) diff --git a/configure b/configure index ed9efad985..8cad88cdd2 100755 --- a/configure +++ b/configure @@ -5412,6 +5412,8 @@ elif enabled ppc; then elif enabled riscv; then + check_headers sys/hwprobe.h + if test_cpp_condition stddef.h "__riscv_zbb"; then enable fast_clz fi diff --git a/libavutil/riscv/cpu.c b/libavutil/riscv/cpu.c index a9263dbb78..36432f9777 100644 --- a/libavutil/riscv/cpu.c +++ b/libavutil/riscv/cpu.c @@ -20,6 +20,7 @@ #include "libavutil/cpu.h" #include "libavutil/cpu_internal.h" +#include "libavutil/macros.h" #include "libavutil/log.h" #include "config.h" @@ -27,26 +28,53 @@ #include #define HWCAP_RV(letter) (1ul << ((letter) - 'A')) #endif +#ifdef HAVE_SYS_HWPROBE_H +#include +#endif int ff_get_cpu_flags_riscv(void) { int ret = 0; +#if defined (HAVE_SYS_HWPROBE_H) + struct riscv_hwprobe pairs[] = { + { RISCV_HWPROBE_KEY_BASE_BEHAVIOR, 0 }, + { RISCV_HWPROBE_KEY_IMA_EXT_0, 0 }, + }; + + if (riscv_hwprobe(pairs, FF_ARRAY_ELEMS(pairs), 0, NULL, 0) == 0) { + if (pairs[0].value & RISCV_HWPROBE_BASE_BEHAVIOR_IMA) { + ret |= AV_CPU_FLAG_RVI; + if (pairs[1].value & RISCV_HWPROBE_IMA_FD) + ret |= AV_FLAG_RVF | AV_FLAG_RVD; +# ifdef RISCV_HWPROBE_IMA_V + if (pairs[1].value & RISCV_HWPROBE_IMA_V) + ret |= AV_CPU_FLAG_RVV_I32 | AV_CPU_FLAG_RVV_I64 + | AV_CPU_FLAG_RVV_F32 | AV_CPU_FLAG_RVV_F64; +# endif +# ifdef RISCV_HWPROBE_EXT_ZBB + if (pairs[1].value & RISCV_HWPROBE_EXT_ZBB) + ret |= AV_FLAG_RVB_BASIC; +# endif + } else +#endif #if HAVE_GETAUXVAL - const unsigned long hwcap = getauxval(AT_HWCAP); + { + const unsigned long hwcap = getauxval(AT_HWCAP); - if (hwcap & HWCAP_RV('I')) - ret |= AV_CPU_FLAG_RVI; - if (hwcap & HWCAP_RV('F')) - ret |= AV_CPU_FLAG_RVF; - if (hwcap & HWCAP_RV('D')) - ret |= AV_CPU_FLAG_RVD; - if (hwcap & HWCAP_RV('B')) - ret |= AV_CPU_FLAG_RVB_BASIC; + if (hwcap & HWCAP_RV('I')) + ret |= AV_CPU_FLAG_RVI; + if (hwcap & HWCAP_RV('F')) + ret |= AV_CPU_FLAG_RVF; + if (hwcap & HWCAP_RV('D')) + ret |= AV_CPU_FLAG_RVD; + if (hwcap & HWCAP_RV('B')) + ret |= AV_CPU_FLAG_RVB_BASIC; - /* The V extension implies all Zve* functional subsets */ - if (hwcap & HWCAP_RV('V')) - ret |= AV_CPU_FLAG_RVV_I32 | AV_CPU_FLAG_RVV_I64 - | AV_CPU_FLAG_RVV_F32 | AV_CPU_FLAG_RVV_F64; + /* The V extension implies all Zve* functional subsets */ + if (hwcap & HWCAP_RV('V')) + ret |= AV_CPU_FLAG_RVV_I32 | AV_CPU_FLAG_RVV_I64 + | AV_CPU_FLAG_RVV_F32 | AV_CPU_FLAG_RVV_F64; + } #endif #ifdef __riscv_i -- 2.40.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".