generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge "Add prefetch before variance calculation"

Browse Source
This commit is contained in:
Yunqing Wang 2011-02-28 11:42:28 -08:00 committed by Code Review
commit cfaee9f7c6
1 changed files with 28 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
vp8/encoder/x86/variance_impl_sse2.asm
View File

@ -85,10 +85,9 @@ sym(vp8_get16x16var_sse2):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 6
GET_GOT rbx
push rbx
push rsi
push rdi
sub rsp, 16
; end prolog
mov rsi, arg(0) ;[src_ptr]
@ -97,6 +96,29 @@ sym(vp8_get16x16var_sse2):
movsxd rax, DWORD PTR arg(1) ;[source_stride]
movsxd rdx, DWORD PTR arg(3) ;[recon_stride]
; Prefetch data
lea rcx, [rax+rax*2]
prefetcht0 [rsi]
prefetcht0 [rsi+rax]
prefetcht0 [rsi+rax*2]
prefetcht0 [rsi+rcx]
lea rbx, [rsi+rax*4]
prefetcht0 [rbx]
prefetcht0 [rbx+rax]
prefetcht0 [rbx+rax*2]
prefetcht0 [rbx+rcx]
lea rcx, [rdx+rdx*2]
prefetcht0 [rdi]
prefetcht0 [rdi+rdx]
prefetcht0 [rdi+rdx*2]
prefetcht0 [rdi+rcx]
lea rbx, [rdi+rdx*4]
prefetcht0 [rbx]
prefetcht0 [rbx+rdx]
prefetcht0 [rbx+rdx*2]
prefetcht0 [rbx+rcx]
pxor xmm0, xmm0 ; clear xmm0 for unpack
pxor xmm7, xmm7 ; clear xmm7 for accumulating diffs
@ -107,6 +129,9 @@ var16loop:
movdqu xmm1, XMMWORD PTR [rsi]
movdqu xmm2, XMMWORD PTR [rdi]
prefetcht0 [rsi+rax*8]
prefetcht0 [rdi+rdx*8]
movdqa xmm3, xmm1
movdqa xmm4, xmm2
@ -178,10 +203,9 @@ var16loop:
; begin epilog
add rsp, 16
pop rdi
pop rsi
RESTORE_GOT
pop rbx
UNSHADOW_ARGS
pop rbp
ret