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| author | Janne Grunau <janne-libav@jannau.net> | 2019-01-01 22:37:11 +0100 |
|---|---|---|
| committer | Janne Grunau <janne-libav@jannau.net> | 2019-01-26 12:05:10 +0100 |
| commit | 846c3d6aca5484904e60946c4fe8b8833bc07f92 (patch) | |
| tree | 45d1953156d38d627bb0328a41725cd238526ec3 | |
| parent | d7f4f5c4a18a0c9e62635cfa6fe8a9302b413c01 (diff) | |
| download | ffmpeg-846c3d6aca5484904e60946c4fe8b8833bc07f92.tar.gz | |
h264/aarch64: optimize neon loop filter
Exit as soon as possible if no filtering will be done.
Improves the checkasm --bench cycle count on a Snapdragon 820e:
h264_h_loop_filter_luma_8bpp_c: 72.4 -> 72.5
h264_h_loop_filter_luma_8bpp_neon: 97.1 -> 56.3
h264_v_loop_filter_luma_8bpp_c: 174.0 -> 173.5
h264_v_loop_filter_luma_8bpp_neon: 62.9 -> 60.9
h264_h_loop_filter_chroma_8bpp_c: 30.2 -> 30.3
h264_h_loop_filter_chroma_8bpp_neon: 51.6 -> 25.7
h264_v_loop_filter_chroma_8bpp_c: 57.3 -> 57.3
h264_v_loop_filter_chroma_8bpp_neon: 28.0 -> 24.0
| -rw-r--r-- | libavcodec/aarch64/h264dsp_neon.S | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/libavcodec/aarch64/h264dsp_neon.S b/libavcodec/aarch64/h264dsp_neon.S index 60ffa24500..b649f1d018 100644 --- a/libavcodec/aarch64/h264dsp_neon.S +++ b/libavcodec/aarch64/h264dsp_neon.S @@ -54,9 +54,12 @@ uabd v17.16B, v20.16B, v16.16B // abs(p2 - p0) and v21.16B, v21.16B, v28.16B uabd v19.16B, v4.16B, v0.16B // abs(q2 - q0) + and v21.16B, v21.16B, v30.16B // < beta + shrn v30.8b, v21.8h, #4 + mov x7, v30.d[0] cmhi v17.16B, v22.16B, v17.16B // < beta - and v21.16B, v21.16B, v30.16B cmhi v19.16B, v22.16B, v19.16B // < beta + cbz x7, 9f and v17.16B, v17.16B, v21.16B and v19.16B, v19.16B, v21.16B and v24.16B, v24.16B, v21.16B @@ -124,7 +127,7 @@ function ff_h264_v_loop_filter_luma_neon, export=1 st1 {v16.16B}, [x0], x1 st1 {v0.16B}, [x0], x1 st1 {v19.16B}, [x0] - +9: ret endfunc @@ -174,32 +177,34 @@ function ff_h264_h_loop_filter_luma_neon, export=1 st1 {v16.S}[3], [x0], x1 st1 {v0.S}[3], [x0], x1 st1 {v19.S}[3], [x0], x1 - +9: ret endfunc .macro h264_loop_filter_chroma dup v22.8B, w2 // alpha + dup v23.8B, w3 // beta uxtl v24.8H, v24.8B uabd v26.8B, v16.8B, v0.8B // abs(p0 - q0) - uxtl v4.8H, v0.8B uabd v28.8B, v18.8B, v16.8B // abs(p1 - p0) + uabd v30.8B, v2.8B, v0.8B // abs(q1 - q0) + cmhi v26.8B, v22.8B, v26.8B // < alpha + cmhi v28.8B, v23.8B, v28.8B // < beta + cmhi v30.8B, v23.8B, v30.8B // < beta + uxtl v4.8H, v0.8B + and v26.8B, v26.8B, v28.8B usubw v4.8H, v4.8H, v16.8B - sli v24.8H, v24.8H, #8 + and v26.8B, v26.8B, v30.8B shl v4.8H, v4.8H, #2 - uabd v30.8B, v2.8B, v0.8B // abs(q1 - q0) + mov x2, v26.d[0] + sli v24.8H, v24.8H, #8 uaddw v4.8H, v4.8H, v18.8B - cmhi v26.8B, v22.8B, v26.8B // < alpha + cbz x2, 9f usubw v4.8H, v4.8H, v2.8B - dup v22.8B, w3 // beta rshrn v4.8B, v4.8H, #3 - cmhi v28.8B, v22.8B, v28.8B // < beta - cmhi v30.8B, v22.8B, v30.8B // < beta smin v4.8B, v4.8B, v24.8B neg v25.8B, v24.8B - and v26.8B, v26.8B, v28.8B smax v4.8B, v4.8B, v25.8B - and v26.8B, v26.8B, v30.8B uxtl v22.8H, v0.8B and v4.8B, v4.8B, v26.8B uxtl v28.8H, v16.8B @@ -224,7 +229,7 @@ function ff_h264_v_loop_filter_chroma_neon, export=1 sub x0, x0, x1, lsl #1 st1 {v16.8B}, [x0], x1 st1 {v0.8B}, [x0], x1 - +9: ret endfunc @@ -257,7 +262,7 @@ function ff_h264_h_loop_filter_chroma_neon, export=1 st1 {v16.S}[1], [x0], x1 st1 {v0.S}[1], [x0], x1 st1 {v2.S}[1], [x0], x1 - +9: ret endfunc |