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[79.185.165.243]) by smtp.gmail.com with ESMTPSA id k1-20020a2eb741000000b0025d542731ffsm645548ljo.5.2022.07.15.01.02.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Jul 2022 01:02:57 -0700 (PDT) From: Hubert Mazur To: ffmpeg-devel@ffmpeg.org Date: Fri, 15 Jul 2022 10:02:24 +0200 Message-Id: <20220715080228.686736-2-hum@semihalf.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220715080228.686736-1-hum@semihalf.com> References: <20220715080228.686736-1-hum@semihalf.com> MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 1/5] lavc/aarch64: Add neon implementation for sse16 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 Cc: gjb@semihalf.com, upstream@semihalf.com, jswinney@amazon.com, Hubert Mazur , martin@martin.st, mw@semihalf.com, spop@amazon.com 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: Provide neon implementation for sse16 function. Performance comparison tests are shown below. - sse_0_c: 273.0 - sse_0_neon: 48.2 Benchmarks and tests run with checkasm tool on AWS Graviton 3. Signed-off-by: Hubert Mazur --- libavcodec/aarch64/me_cmp_init_aarch64.c | 4 ++ libavcodec/aarch64/me_cmp_neon.S | 82 ++++++++++++++++++++++++ 2 files changed, 86 insertions(+) diff --git a/libavcodec/aarch64/me_cmp_init_aarch64.c b/libavcodec/aarch64/me_cmp_init_aarch64.c index 136b008eb7..3ff5767bd0 100644 --- a/libavcodec/aarch64/me_cmp_init_aarch64.c +++ b/libavcodec/aarch64/me_cmp_init_aarch64.c @@ -30,6 +30,9 @@ int ff_pix_abs16_xy2_neon(MpegEncContext *s, uint8_t *blk1, uint8_t *blk2, int ff_pix_abs16_x2_neon(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t stride, int h); +int sse16_neon(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, + ptrdiff_t stride, int h); + av_cold void ff_me_cmp_init_aarch64(MECmpContext *c, AVCodecContext *avctx) { int cpu_flags = av_get_cpu_flags(); @@ -40,5 +43,6 @@ av_cold void ff_me_cmp_init_aarch64(MECmpContext *c, AVCodecContext *avctx) c->pix_abs[0][3] = ff_pix_abs16_xy2_neon; c->sad[0] = ff_pix_abs16_neon; + c->sse[0] = sse16_neon; } } diff --git a/libavcodec/aarch64/me_cmp_neon.S b/libavcodec/aarch64/me_cmp_neon.S index e49d049fc2..88cd335443 100644 --- a/libavcodec/aarch64/me_cmp_neon.S +++ b/libavcodec/aarch64/me_cmp_neon.S @@ -278,3 +278,85 @@ function ff_pix_abs16_x2_neon, export=1 ret endfunc + +function sse16_neon, export=1 + // x0 - unused + // x1 - pix1 + // x2 - pix2 + // x3 - stride + // w4 - h + + cmp w4, #4 + movi d18, #0 + b.lt 2f + +// make 4 iterations at once +1: + + // res = abs(pix1[0] - pix2[0]) + // res * res + + ld1 {v0.16b}, [x1], x3 + ld1 {v1.16b}, [x2], x3 + uabd v30.16b, v0.16b, v1.16b + ld1 {v2.16b}, [x1], x3 + umull v29.8h, v30.8b, v30.8b + ld1 {v3.16b}, [x2], x3 + umull2 v28.8h, v30.16b, v30.16b + uabd v27.16b, v2.16b, v3.16b + uaddlp v17.4s, v29.8h + umull v26.8h, v27.8b, v27.8b + umull2 v25.8h, v27.16b, v27.16b + ld1 {v4.16b}, [x1], x3 + uadalp v17.4s, v26.8h + ld1 {v5.16b}, [x2], x3 + uadalp v17.4s, v25.8h + uabd v24.16b, v4.16b, v5.16b + ld1 {v6.16b}, [x1], x3 + umull v23.8h, v24.8b, v24.8b + uadalp v17.4s, v23.8h + umull2 v22.8h, v24.16b, v24.16b + uadalp v17.4s, v22.8h + ld1 {v7.16b}, [x2], x3 + uadalp v17.4s, v28.8h + uabd v21.16b, v6.16b, v7.16b + umull v20.8h, v21.8b, v21.8b + uadalp v17.4s, v20.8h + umull2 v19.8h, v21.16b, v21.16b + uadalp v17.4s, v19.8h + + sub w4, w4, #4 + uaddlv d16, v17.4s + cmp w4, #4 + add d18, d18, d16 + + b.ge 1b + + cbnz w4, 2f + fmov w0, s18 + + ret + +// iterate by one +2: + + ld1 {v0.16b}, [x1], x3 + ld1 {v1.16b}, [x2], x3 + + uabd v30.16b, v0.16b, v1.16b + umull v29.8h, v0.8b, v1.8b + umull2 v28.8h, v0.16b, v1.16b + uaddlp v17.4s, v29.8h + uadalp v17.4s, v28.8h + + + subs w4, w4, #1 + uaddlv d16, v17.4s + add d18, d18, d16 + + b.ne 2b + fmov w0, s18 + + ret + +endfunc -- 2.34.1 _______________________________________________ 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".