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sws/aarch64/yuv2rgb: save a few mul and add 

27ms to 26ms with UHD 2160 input.
This commit is contained in:
Clément Bœsch 2016-03-25 15:49:09 +01:00
parent 99388eb091
commit 277408b7f1
1 changed files with 11 additions and 14 deletions
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25
libswscale/aarch64/yuv2rgb_neon.S
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@ -143,20 +143,17 @@ function ff_\ifmt\()_to_\ofmt\()_neon, export=1
load_chroma_\ifmt
sub v18.8H, v18.8H, v5.8H // U*(1<<3) - 128*(1<<3)
sub v19.8H, v19.8H, v5.8H // V*(1<<3) - 128*(1<<3)
zip1 v6.8H, v19.8H, v19.8H // V1
zip2 v7.8H, v19.8H, v19.8H // V2
zip1 v4.8H, v18.8H, v18.8H // U1
zip2 v5.8H, v18.8H, v18.8H // U2
sqdmulh v20.8H, v6.8H, v1.H[0] // V1 * v2r (R1)
sqdmulh v21.8H, v7.8H, v1.H[0] // V2 * v2r (R2)
sqdmulh v22.8H, v4.8H, v1.H[1] // U1 * u2g
sqdmulh v23.8H, v5.8H, v1.H[1] // U2 * u2g
sqdmulh v6.8H, v6.8H, v1.H[2] // V1 * v2g
sqdmulh v7.8H, v7.8H, v1.H[2] // V2 * v2g
add v22.8H, v22.8H, v6.8H // U1 * u2g + V1 * v2g (G1)
add v23.8H, v23.8H, v7.8H // U2 * u2g + V2 * v2g (G2)
sqdmulh v24.8H, v4.8H, v1.H[3] // U1 * u2b (B1)
sqdmulh v25.8H, v5.8H, v1.H[3] // U2 * u2b (B2)
sqdmulh v20.8H, v19.8H, v1.H[0] // V * v2r (R)
sqdmulh v22.8H, v18.8H, v1.H[1] // U * u2g
sqdmulh v19.8H, v19.8H, v1.H[2] // V * v2g
add v22.8H, v22.8H, v19.8H // U * u2g + V * v2g (G)
sqdmulh v24.8H, v18.8H, v1.H[3] // U * u2b (B)
zip2 v21.8H, v20.8H, v20.8H // R2
zip1 v20.8H, v20.8H, v20.8H // R1
zip2 v23.8H, v22.8H, v22.8H // G2
zip1 v22.8H, v22.8H, v22.8H // G1
zip2 v25.8H, v24.8H, v24.8H // B2
zip1 v24.8H, v24.8H, v24.8H // B1
ld1 {v2.16B}, [x4], #16 // load luma
ushll v26.8H, v2.8B, #3 // Y1*(1<<3)
ushll2 v27.8H, v2.16B, #3 // Y2*(1<<3)