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VP9_COPY_CONVOLVE_SSE2 optimization

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This function suffers from a couple problems in small core(tablets):
-The load of the next iteration is blocked by the store of previous iteration
-4k aliasing (between future store and older loads)
-current small core machine are in-order machine and because of it the store will spin the rehabQ until the load is finished
fixed by:
- prefetching 2 lines ahead
- unroll copy of 2 rows of block
- pre-load all xmm regiters before the loop, final stores after the loop
The function is optimized by:
copy_convolve_sse2 64x64 - 16%
copy_convolve_sse2 32x32 - 52%
copy_convolve_sse2 16x16 - 6%
copy_convolve_sse2 8x8 - 2.5%
copy_convolve_sse2 4x4 - 2.7%
credit goes to Tom Craver(tom.r.craver@intel.com) and Ilya Albrekht(ilya.albrekht@intel.com)

Change-Id: I63d3428799c50b2bf7b5677c8268bacb9fc29671
This commit is contained in:
Scott LaVarnway 2015-07-30 05:02:04 -07:00
parent 6025c6d65b
commit a5e97d874b
1 changed files with 244 additions and 95 deletions
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223
vpx_dsp/x86/vpx_convolve_copy_sse2.asm
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@ -28,117 +28,264 @@ cglobal convolve_%1, 4, 7, 4, src, src_stride, dst, dst_stride, \
cmp r4d, 32
je .w32
; 64xh
mov r4d, dword hm
.loop64:
shr r4d, 1 ; ASSUMPTION: hm is at least EVEN
sub r4d, 1
movu m0, [srcq]
movu m4, [srcq+src_strideq]
movu m1, [srcq+16]
movu m5, [srcq+src_strideq+16]
movu m2, [srcq+32]
movu m6, [srcq+src_strideq+32]
movu m3, [srcq+48]
add srcq, src_strideq
movu m7, [srcq+src_strideq+48]
.loop64:
prefetcht0 [srcq+64 ]
prefetcht0 [srcq+src_strideq+64]
lea srcq, [srcq+src_strideq*2]
%ifidn %1, avg
pavgb m0, [dstq]
pavgb m1, [dstq+16]
mova [dstq ], m0
movu m0, [srcq]
mova [dstq+16], m1
movu m1, [srcq+16]
pavgb m2, [dstq+32]
mova [dstq+32], m2
movu m2, [srcq+32]
pavgb m3, [dstq+48]
mova [dstq+48], m3
movu m3, [srcq+48]
pavgb m4, [dstq+dst_strideq]
mova [dstq+dst_strideq], m4
movu m4, [srcq+src_strideq]
pavgb m5, [dstq+dst_strideq+16]
mova [dstq+dst_strideq+16], m5
movu m5, [srcq+src_strideq+16]
pavgb m6, [dstq+dst_strideq+32]
mova [dstq+dst_strideq+32], m6
movu m6, [srcq+src_strideq+32]
pavgb m7, [dstq+dst_strideq+48]
mova [dstq+dst_strideq+48], m7
movu m7, [srcq+src_strideq+48]
lea dstq, [dstq+dst_strideq*2]
%else
mova [dstq ], m0
movu m0, [srcq]
mova [dstq+16], m1
movu m1, [srcq+16]
mova [dstq+32], m2
movu m2, [srcq+32]
mova [dstq+48], m3
movu m3, [srcq+48]
mova [dstq+dst_strideq], m4
movu m4, [srcq+src_strideq]
mova [dstq+dst_strideq+16], m5
movu m5, [srcq+src_strideq+16]
mova [dstq+dst_strideq+32], m6
movu m6, [srcq+src_strideq+32]
mova [dstq+dst_strideq+48], m7
movu m7, [srcq+src_strideq+48]
lea dstq, [dstq+dst_strideq*2]
%endif
dec r4d
jnz .loop64
%ifidn %1, avg
pavgb m0, [dstq]
pavgb m1, [dstq+16]
pavgb m2, [dstq+32]
pavgb m3, [dstq+48]
pavgb m4, [dstq+dst_strideq]
pavgb m5, [dstq+dst_strideq+16]
pavgb m6, [dstq+dst_strideq+32]
pavgb m7, [dstq+dst_strideq+48]
%endif
mova [dstq ], m0
mova [dstq+16], m1
mova [dstq+32], m2
mova [dstq+48], m3
add dstq, dst_strideq
dec r4d
jnz .loop64
mova [dstq+dst_strideq ], m4
mova [dstq+dst_strideq+16], m5
mova [dstq+dst_strideq+32], m6
mova [dstq+dst_strideq+48], m7
RET
.w32:
mov r4d, dword hm
.loop32:
sub r4d, 2
movu m0, [srcq]
movu m1, [srcq+16]
movu m2, [srcq+src_strideq]
movu m3, [srcq+src_strideq+16]
.loop32:
prefetcht0 [srcq+64]
prefetcht0 [srcq+src_strideq+64]
lea srcq, [srcq+src_strideq*2]
%ifidn %1, avg
pavgb m0, [dstq]
pavgb m1, [dstq +16]
pavgb m1, [dstq+16]
pavgb m2, [dstq+dst_strideq]
pavgb m3, [dstq+dst_strideq+16]
%endif
mova [dstq], m0
movu m0, [srcq]
mova [dstq+16], m1
movu m1, [srcq+16]
mova [dstq+dst_strideq], m2
movu m2, [srcq+src_strideq]
mova [dstq+dst_strideq+16], m3
movu m3, [srcq+src_strideq+16]
lea dstq, [dstq+dst_strideq*2]
sub r4d, 2
jnz .loop32
%ifidn %1, avg
pavgb m0, [dstq]
pavgb m1, [dstq+16]
pavgb m2, [dstq+dst_strideq]
pavgb m3, [dstq+dst_strideq+16]
%endif
mova [dstq ], m0
mova [dstq +16], m1
mova [dstq+16], m1
mova [dstq+dst_strideq ], m2
mova [dstq+dst_strideq+16], m3
lea dstq, [dstq+dst_strideq*2]
sub r4d, 2
jnz .loop32
RET
.w16:
mov r4d, dword hm
lea r5q, [src_strideq*3]
lea r6q, [dst_strideq*3]
.loop16:
sub r4d, 4
movu m0, [srcq]
movu m1, [srcq+src_strideq]
movu m2, [srcq+src_strideq*2]
movu m3, [srcq+r5q]
lea srcq, [srcq+src_strideq*4]
.loop16:
lea srcq, [srcq+src_strideq]
prefetcht0 [srcq+src_strideq*4]
lea srcq, [srcq+src_strideq]
prefetcht0 [srcq+src_strideq*2]
%ifidn %1, avg
pavgb m0, [dstq]
pavgb m1, [dstq+dst_strideq]
pavgb m2, [dstq+dst_strideq*2]
pavgb m3, [dstq+r6q]
%endif
mova [dstq ], m0
mova [dstq+dst_strideq ], m1
mova [dstq+dst_strideq*2], m2
mova [dstq+r6q ], m3
lea dstq, [dstq+dst_strideq*4]
sub r4d, 4
mova [dstq+dst_strideq], m1
lea dstq, [dstq+dst_strideq*2]
movu m0, [srcq]
movu m1, [srcq+src_strideq]
sub r4d, 2
jnz .loop16
lea srcq, [srcq+src_strideq*2]
%ifidn %1, avg
pavgb m0, [dstq]
pavgb m1, [dstq+dst_strideq]
%endif
mova [dstq ], m0
mova [dstq+dst_strideq], m1
lea dstq, [dstq+dst_strideq*2]
movu m0, [srcq]
movu m1, [srcq+src_strideq]
%ifidn %1, avg
pavgb m0, [dstq]
pavgb m1, [dstq+dst_strideq]
%endif
mova [dstq ], m0
mova [dstq+dst_strideq], m1
RET
INIT_MMX sse
.w8:
mov r4d, dword hm
lea r5q, [src_strideq*3]
lea r6q, [dst_strideq*3]
.loop8:
sub r4d, 2
movu m0, [srcq]
movu m1, [srcq+src_strideq]
movu m2, [srcq+src_strideq*2]
movu m3, [srcq+r5q]
lea srcq, [srcq+src_strideq*4]
.loop8:
lea srcq, [srcq+src_strideq]
prefetcht0 [srcq+src_strideq*4]
lea srcq, [srcq+src_strideq]
prefetcht0 [srcq+src_strideq*2]
%ifidn %1, avg
pavgb m0, [dstq]
pavgb m1, [dstq+dst_strideq]
pavgb m2, [dstq+dst_strideq*2]
pavgb m3, [dstq+r6q]
%endif
mova [dstq ], m0
mova [dstq+dst_strideq ], m1
mova [dstq+dst_strideq*2], m2
mova [dstq+r6q ], m3
lea dstq, [dstq+dst_strideq*4]
sub r4d, 4
mova [dstq+dst_strideq], m1
movu m0, [srcq]
movu m1, [srcq+src_strideq]
lea dstq, [dstq+dst_strideq*2]
sub r4d, 2
jnz .loop8
%ifidn %1, avg
pavgb m0, [dstq]
pavgb m1, [dstq+dst_strideq]
%endif
mova [dstq ], m0
mova [dstq+dst_strideq], m1
RET
.w4:
mov r4d, dword hm
lea r5q, [src_strideq*3]
lea r6q, [dst_strideq*3]
.loop4:
movh m0, [srcq]
movh m1, [srcq+src_strideq]
movh m2, [srcq+src_strideq*2]
movh m3, [srcq+r5q]
lea srcq, [srcq+src_strideq*4]
%ifidn %1, avg
movh m4, [dstq]
movh m5, [dstq+dst_strideq]
movh m6, [dstq+dst_strideq*2]
movh m7, [dstq+r6q]
pavgb m0, m4
pavgb m1, m5
pavgb m2, m6
@ -148,7 +295,9 @@ INIT_MMX sse
movh [dstq+dst_strideq ], m1
movh [dstq+dst_strideq*2], m2
movh [dstq+r6q ], m3
lea dstq, [dstq+dst_strideq*4]
sub r4d, 4
jnz .loop4
RET