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[79.185.165.243]) by smtp.gmail.com with ESMTPSA id k1-20020a2eb741000000b0025d542731ffsm645548ljo.5.2022.07.15.01.02.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Jul 2022 01:03:00 -0700 (PDT) From: Hubert Mazur To: ffmpeg-devel@ffmpeg.org Date: Fri, 15 Jul 2022 10:02:25 +0200 Message-Id: <20220715080228.686736-3-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 2/5] lavc/aarch64: Add neon implementation for sse4 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 sse4 function. Performance comparison tests are shown below. - sse_2_c: 74.0 - sse_2_neon: 24.0 Benchmarks and tests are run with checkasm tool on AWS Graviton 3. Signed-off-by: Hubert Mazur --- libavcodec/aarch64/me_cmp_init_aarch64.c | 3 ++ libavcodec/aarch64/me_cmp_neon.S | 65 ++++++++++++++++++++++++ 2 files changed, 68 insertions(+) diff --git a/libavcodec/aarch64/me_cmp_init_aarch64.c b/libavcodec/aarch64/me_cmp_init_aarch64.c index 3ff5767bd0..72a2062e7e 100644 --- a/libavcodec/aarch64/me_cmp_init_aarch64.c +++ b/libavcodec/aarch64/me_cmp_init_aarch64.c @@ -32,6 +32,8 @@ int ff_pix_abs16_x2_neon(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int sse16_neon(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t stride, int h); +int sse4_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) { @@ -44,5 +46,6 @@ av_cold void ff_me_cmp_init_aarch64(MECmpContext *c, AVCodecContext *avctx) c->sad[0] = ff_pix_abs16_neon; c->sse[0] = sse16_neon; + c->sse[2] = sse4_neon; } } diff --git a/libavcodec/aarch64/me_cmp_neon.S b/libavcodec/aarch64/me_cmp_neon.S index 88cd335443..bacf151314 100644 --- a/libavcodec/aarch64/me_cmp_neon.S +++ b/libavcodec/aarch64/me_cmp_neon.S @@ -360,3 +360,68 @@ function sse16_neon, export=1 ret endfunc + +function sse4_neon, export=1 + // x0 - unused + // x1 - pix1 + // x2 - pix2 + // x3 - stride + // w4 - h + + movi d18, #0 + movi d17, #0 + cmp w4, #4 + b.le 2f + +// make 4 iterations at once +1: + + // res = abs(pix1[0] - pix2[0]) + // res * res + + ld1 {v0.4b}, [x1], x3 + ld1 {v1.4b}, [x2], x3 + uabdl v30.8h, v0.4b, v1.4b + ld1 {v2.4b}, [x1], x3 + ld1 {v3.4b}, [x2], x3 + umull v16.4s, v30.4h, v30.4h + uabdl v29.8h, v2.4b, v3.4b + ld1 {v4.4b}, [x1], x3 + ld1 {v5.4b}, [x2], x3 + umlal v16.4s, v29.4h, v29.4h + uabdl v28.8h, v4.4b, v5.4b + ld1 {v6.4b}, [x1], x3 + ld1 {v7.4b}, [x2], x3 + umlal v16.4s, v28.4h, v28.4h + uabdl v27.8h, v6.4b, v7.4b + umlal v16.4s, v27.4h, v27.4h + + uaddlv d17, v16.4s + add d18, d18, d17 + + sub w4, w4, #4 + cmp w4, #4 + b.ge 1b + + cbnz w4, 2f + fmov w0, s18 + + ret + +// iterate by one +2: + ld1 {v0.4b}, [x1], x3 + ld1 {v1.4b}, [x2], x3 + uabdl v30.8h, v0.4b, v1.4b + umull v16.4s, v30.4h, v30.4h + + uaddlv d17, v16.4s + add d18, d18, d17 + + subs w4, w4, #1 + 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".