ref: 2ab7b9a6c96ad0891bde3379ebbe607b8978d824
dir: /vp8/common/x86/postproc_mmx.asm/
;
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
%include "vpx_ports/x86_abi_support.asm"
%define VP8_FILTER_WEIGHT 128
%define VP8_FILTER_SHIFT 7
;void vp8_mbpost_proc_down_mmx(unsigned char *dst,
; int pitch, int rows, int cols,int flimit)
extern sym(vp8_rv)
global sym(vp8_mbpost_proc_down_mmx) PRIVATE
sym(vp8_mbpost_proc_down_mmx):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 5
GET_GOT rbx
push rsi
push rdi
; end prolog
ALIGN_STACK 16, rax
sub rsp, 136
; unsigned char d[16][8] at [rsp]
; create flimit2 at [rsp+128]
mov eax, dword ptr arg(4) ;flimit
mov [rsp+128], eax
mov [rsp+128+4], eax
%define flimit2 [rsp+128]
%if ABI_IS_32BIT=0
lea r8, [GLOBAL(sym(vp8_rv))]
%endif
;rows +=8;
add dword ptr arg(2), 8
;for(c=0; c<cols; c+=4)
.loop_col:
mov rsi, arg(0) ;s
pxor mm0, mm0 ;
movsxd rax, dword ptr arg(1) ;pitch ;
; this copies the last row down into the border 8 rows
mov rdi, rsi
mov rdx, arg(2)
sub rdx, 9
imul rdx, rax
lea rdi, [rdi+rdx]
movq mm1, QWORD ptr[rdi] ; first row
mov rcx, 8
.init_borderd ; initialize borders
lea rdi, [rdi + rax]
movq [rdi], mm1
dec rcx
jne .init_borderd
neg rax ; rax = -pitch
; this copies the first row up into the border 8 rows
mov rdi, rsi
movq mm1, QWORD ptr[rdi] ; first row
mov rcx, 8
.init_border ; initialize borders
lea rdi, [rdi + rax]
movq [rdi], mm1
dec rcx
jne .init_border
lea rsi, [rsi + rax*8]; ; rdi = s[-pitch*8]
neg rax
pxor mm5, mm5
pxor mm6, mm6 ;
pxor mm7, mm7 ;
mov rdi, rsi
mov rcx, 15 ;
.loop_initvar:
movd mm1, DWORD PTR [rdi];
punpcklbw mm1, mm0 ;
paddw mm5, mm1 ;
pmullw mm1, mm1 ;
movq mm2, mm1 ;
punpcklwd mm1, mm0 ;
punpckhwd mm2, mm0 ;
paddd mm6, mm1 ;
paddd mm7, mm2 ;
lea rdi, [rdi+rax] ;
dec rcx
jne .loop_initvar
;save the var and sum
xor rdx, rdx
.loop_row:
movd mm1, DWORD PTR [rsi] ; [s-pitch*8]
movd mm2, DWORD PTR [rdi] ; [s+pitch*7]
punpcklbw mm1, mm0
punpcklbw mm2, mm0
paddw mm5, mm2
psubw mm5, mm1
pmullw mm2, mm2
movq mm4, mm2
punpcklwd mm2, mm0
punpckhwd mm4, mm0
paddd mm6, mm2
paddd mm7, mm4
pmullw mm1, mm1
movq mm2, mm1
punpcklwd mm1, mm0
psubd mm6, mm1
punpckhwd mm2, mm0
psubd mm7, mm2
movq mm3, mm6
pslld mm3, 4
psubd mm3, mm6
movq mm1, mm5
movq mm4, mm5
pmullw mm1, mm1
pmulhw mm4, mm4
movq mm2, mm1
punpcklwd mm1, mm4
punpckhwd mm2, mm4
movq mm4, mm7
pslld mm4, 4
psubd mm4, mm7
psubd mm3, mm1
psubd mm4, mm2
psubd mm3, flimit2
psubd mm4, flimit2
psrad mm3, 31
psrad mm4, 31
packssdw mm3, mm4
packsswb mm3, mm0
movd mm1, DWORD PTR [rsi+rax*8]
movq mm2, mm1
punpcklbw mm1, mm0
paddw mm1, mm5
mov rcx, rdx
and rcx, 127
%if ABI_IS_32BIT=1 && CONFIG_PIC=1
push rax
lea rax, [GLOBAL(sym(vp8_rv))]
movq mm4, [rax + rcx*2] ;vp8_rv[rcx*2]
pop rax
%elif ABI_IS_32BIT=0
movq mm4, [r8 + rcx*2] ;vp8_rv[rcx*2]
%else
movq mm4, [sym(vp8_rv) + rcx*2]
%endif
paddw mm1, mm4
psraw mm1, 4
packuswb mm1, mm0
pand mm1, mm3
pandn mm3, mm2
por mm1, mm3
and rcx, 15
movd DWORD PTR [rsp+rcx*4], mm1 ;d[rcx*4]
cmp edx, 8
jl .skip_assignment
mov rcx, rdx
sub rcx, 8
and rcx, 15
movd mm1, DWORD PTR [rsp+rcx*4] ;d[rcx*4]
movd [rsi], mm1
.skip_assignment
lea rsi, [rsi+rax]
lea rdi, [rdi+rax]
add rdx, 1
cmp edx, dword arg(2) ;rows
jl .loop_row
add dword arg(0), 4 ; s += 4
sub dword arg(3), 4 ; cols -= 4
cmp dword arg(3), 0
jg .loop_col
add rsp, 136
pop rsp
; begin epilog
pop rdi
pop rsi
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
%undef flimit2
SECTION_RODATA
align 16
Blur:
times 16 dw 16
times 8 dw 64
times 16 dw 16
times 8 dw 0
rd:
times 4 dw 0x40