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aarch64: hevc: Merge consecutive stores in put_hevc_\type\()_h16_8_neon 

This gets rid of a couple instructions, but the actual performance
is almost identical on Cortex A72/A73. On Cortex A53, it is a
handful of cycles faster.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2024-03-22 11:38:15 +02:00
parent 78db8405c0
commit e3a54cabde
1 changed files with 5 additions and 10 deletions
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15
libavcodec/aarch64/hevcdsp_qpel_neon.S
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@ -512,11 +512,10 @@ function ff_hevc_put_hevc_\type\()_h16_8_neon, export=1
.ifc \type, qpel
mov dststride, #(MAX_PB_SIZE << 1)
lsl x13, srcstride, #1 // srcstridel
mov x14, #((MAX_PB_SIZE << 2) - 16)
mov x14, #(MAX_PB_SIZE << 2)
.else
lsl x14, dststride, #1 // dststridel
lsl x13, srcstride, #1 // srcstridel
sub x14, x14, #8
.endif
add x10, dst, dststride // dstb
add x12, src, srcstride // srcb
@ -527,10 +526,8 @@ function ff_hevc_put_hevc_\type\()_h16_8_neon, export=1
bl ff_hevc_put_hevc_h16_8_neon
.ifc \type, qpel
st1 {v26.8h}, [dst], #16
st1 {v28.8h}, [x10], #16
st1 {v27.8h}, [dst], x14
st1 {v29.8h}, [x10], x14
st1 {v26.8h, v27.8h}, [dst], x14
st1 {v28.8h, v29.8h}, [x10], x14
.else
.ifc \type, qpel_bi
ld1 {v16.8h, v17.8h}, [ x4], x16
@ -549,10 +546,8 @@ function ff_hevc_put_hevc_\type\()_h16_8_neon, export=1
sqrshrun v28.8b, v28.8h, #6
sqrshrun v29.8b, v29.8h, #6
.endif
st1 {v26.8b}, [dst], #8
st1 {v28.8b}, [x10], #8
st1 {v27.8b}, [dst], x14
st1 {v29.8b}, [x10], x14
st1 {v26.8b, v27.8b}, [dst], x14
st1 {v28.8b, v29.8b}, [x10], x14
.endif
b.gt 1b // double line
subs width, width, #16