diff options
| author | Hubert Mazur <hum@semihalf.com> | 2022-09-08 11:25:05 +0200 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2022-09-09 10:19:46 +0300 |
| commit | ce03ea3e796bdf9013da51d53e89759a92707c4a (patch) | |
| tree | 14aa232bb1b3ef5b45ad97dc7fe1c3f8a2472acd /libavcodec/aarch64 | |
| parent | c495a4b32d352e087318d3a09a9bb4f2b55cfa04 (diff) | |
lavc/aarch64: Add neon implementation for vsad_intra16
Provide optimized implementation for vsad_intra16 function for arm64.
Performance comparison tests are shown below.
- vsad_4_c: 177.5
- vsad_4_neon: 23.5
Benchmarks and tests are run with checkasm tool on AWS Gravtion 3.
Signed-off-by: Hubert Mazur <hum@semihalf.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
Diffstat (limited to 'libavcodec/aarch64')
| -rw-r--r-- | libavcodec/aarch64/me_cmp_init_aarch64.c | 3 | ||||
| -rw-r--r-- | libavcodec/aarch64/me_cmp_neon.S | 48 |
2 files changed, 51 insertions, 0 deletions
diff --git a/libavcodec/aarch64/me_cmp_init_aarch64.c b/libavcodec/aarch64/me_cmp_init_aarch64.c index 7b81e48d16..af83f7ed1e 100644 --- a/libavcodec/aarch64/me_cmp_init_aarch64.c +++ b/libavcodec/aarch64/me_cmp_init_aarch64.c @@ -43,6 +43,8 @@ int sse4_neon(MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, int vsad16_neon(MpegEncContext *c, const uint8_t *s1, const uint8_t *s2, ptrdiff_t stride, int h); +int vsad_intra16_neon(MpegEncContext *c, const uint8_t *s, const uint8_t *dummy, + ptrdiff_t stride, int h) ; int vsse16_neon(MpegEncContext *c, const uint8_t *s1, const uint8_t *s2, ptrdiff_t stride, int h); @@ -64,6 +66,7 @@ av_cold void ff_me_cmp_init_aarch64(MECmpContext *c, AVCodecContext *avctx) c->sse[2] = sse4_neon; c->vsad[0] = vsad16_neon; + c->vsad[4] = vsad_intra16_neon; c->vsse[0] = vsse16_neon; } diff --git a/libavcodec/aarch64/me_cmp_neon.S b/libavcodec/aarch64/me_cmp_neon.S index b3f376aa60..ce198ea227 100644 --- a/libavcodec/aarch64/me_cmp_neon.S +++ b/libavcodec/aarch64/me_cmp_neon.S @@ -736,3 +736,51 @@ function vsse16_neon, export=1 ret endfunc + +function vsad_intra16_neon, export=1 + // x0 unused + // x1 uint8_t *pix1 + // x2 uint8_t *dummy + // x3 ptrdiff_t stride + // w4 int h + + ld1 {v0.16b}, [x1], x3 + sub w4, w4, #1 // we need to make h-1 iterations + cmp w4, #3 + movi v16.8h, #0 + b.lt 2f + +// make 4 iterations at once +1: + // v = abs( pix1[0] - pix1[0 + stride] ) + // score = sum(v) + ld1 {v1.16b}, [x1], x3 + ld1 {v2.16b}, [x1], x3 + uabal v16.8h, v0.8b, v1.8b + ld1 {v3.16b}, [x1], x3 + uabal2 v16.8h, v0.16b, v1.16b + sub w4, w4, #3 + uabal v16.8h, v1.8b, v2.8b + cmp w4, #3 + uabal2 v16.8h, v1.16b, v2.16b + mov v0.16b, v3.16b + uabal v16.8h, v2.8b, v3.8b + uabal2 v16.8h, v2.16b, v3.16b + b.ge 1b + cbz w4, 3f + +// iterate by one +2: + ld1 {v1.16b}, [x1], x3 + subs w4, w4, #1 + uabal v16.8h, v0.8b, v1.8b + uabal2 v16.8h, v0.16b, v1.16b + mov v0.16b, v1.16b + cbnz w4, 2b + +3: + uaddlv s17, v16.8h + fmov w0, s17 + + ret +endfunc |