ref: 4a101310e8fc7bf7bc0cd947d863634d40fb19fc
dir: /vp8/encoder/x86/subtract_sse2.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"
;void vp8_subtract_b_sse2_impl(unsigned char *z, int src_stride,
; short *diff, unsigned char *Predictor,
; int pitch);
global sym(vp8_subtract_b_sse2_impl) PRIVATE
sym(vp8_subtract_b_sse2_impl):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 5
GET_GOT rbx
push rsi
push rdi
; end prolog
mov rdi, arg(2) ;diff
mov rax, arg(3) ;Predictor
mov rsi, arg(0) ;z
movsxd rdx, dword ptr arg(1);src_stride;
movsxd rcx, dword ptr arg(4);pitch
pxor mm7, mm7
movd mm0, [rsi]
movd mm1, [rax]
punpcklbw mm0, mm7
punpcklbw mm1, mm7
psubw mm0, mm1
movq MMWORD PTR [rdi], mm0
movd mm0, [rsi+rdx]
movd mm1, [rax+rcx]
punpcklbw mm0, mm7
punpcklbw mm1, mm7
psubw mm0, mm1
movq MMWORD PTR [rdi+rcx*2], mm0
movd mm0, [rsi+rdx*2]
movd mm1, [rax+rcx*2]
punpcklbw mm0, mm7
punpcklbw mm1, mm7
psubw mm0, mm1
movq MMWORD PTR [rdi+rcx*4], mm0
lea rsi, [rsi+rdx*2]
lea rcx, [rcx+rcx*2]
movd mm0, [rsi+rdx]
movd mm1, [rax+rcx]
punpcklbw mm0, mm7
punpcklbw mm1, mm7
psubw mm0, mm1
movq MMWORD PTR [rdi+rcx*2], mm0
; begin epilog
pop rdi
pop rsi
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
;void vp8_subtract_mby_sse2(short *diff, unsigned char *src, int src_stride,
;unsigned char *pred, int pred_stride)
global sym(vp8_subtract_mby_sse2) PRIVATE
sym(vp8_subtract_mby_sse2):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 5
GET_GOT rbx
push rsi
push rdi
; end prolog
mov rdi, arg(0) ;diff
mov rsi, arg(1) ;src
movsxd rdx, dword ptr arg(2);src_stride
mov rax, arg(3) ;pred
movdqa xmm4, [GLOBAL(t80)]
push rbx
mov rcx, 8 ; do two lines at one time
movsxd rbx, dword ptr arg(4);pred_stride
.submby_loop:
movdqa xmm0, [rsi] ; src
movdqa xmm1, [rax] ; pred
movdqa xmm2, xmm0
psubb xmm0, xmm1
pxor xmm1, xmm4 ;convert to signed values
pxor xmm2, xmm4
pcmpgtb xmm1, xmm2 ; obtain sign information
movdqa xmm2, xmm0
punpcklbw xmm0, xmm1 ; put sign back to subtraction
punpckhbw xmm2, xmm1 ; put sign back to subtraction
movdqa xmm3, [rsi + rdx]
movdqa xmm5, [rax + rbx]
lea rsi, [rsi+rdx*2]
lea rax, [rax+rbx*2]
movdqa [rdi], xmm0
movdqa [rdi +16], xmm2
movdqa xmm1, xmm3
psubb xmm3, xmm5
pxor xmm5, xmm4 ;convert to signed values
pxor xmm1, xmm4
pcmpgtb xmm5, xmm1 ; obtain sign information
movdqa xmm1, xmm3
punpcklbw xmm3, xmm5 ; put sign back to subtraction
punpckhbw xmm1, xmm5 ; put sign back to subtraction
movdqa [rdi +32], xmm3
movdqa [rdi +48], xmm1
add rdi, 64
dec rcx
jnz .submby_loop
pop rbx
pop rdi
pop rsi
; begin epilog
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
;vp8_subtract_mbuv_sse2(short *diff, unsigned char *usrc, unsigned char *vsrc,
; int src_stride, unsigned char *upred,
; unsigned char *vpred, int pred_stride)
global sym(vp8_subtract_mbuv_sse2) PRIVATE
sym(vp8_subtract_mbuv_sse2):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 7
GET_GOT rbx
push rsi
push rdi
; end prolog
movdqa xmm4, [GLOBAL(t80)]
mov rdi, arg(0) ;diff
mov rsi, arg(1) ;usrc
movsxd rdx, dword ptr arg(3);src_stride;
mov rax, arg(4) ;upred
add rdi, 256*2 ;diff = diff + 256 (shorts)
mov rcx, 4
push rbx
movsxd rbx, dword ptr arg(6);pred_stride
;u
.submbu_loop:
movq xmm0, [rsi] ; src
movq xmm2, [rsi+rdx] ; src -- next line
movq xmm1, [rax] ; pred
movq xmm3, [rax+rbx] ; pred -- next line
lea rsi, [rsi + rdx*2]
lea rax, [rax + rbx*2]
punpcklqdq xmm0, xmm2
punpcklqdq xmm1, xmm3
movdqa xmm2, xmm0
psubb xmm0, xmm1 ; subtraction with sign missed
pxor xmm1, xmm4 ;convert to signed values
pxor xmm2, xmm4
pcmpgtb xmm1, xmm2 ; obtain sign information
movdqa xmm2, xmm0
movdqa xmm3, xmm1
punpcklbw xmm0, xmm1 ; put sign back to subtraction
punpckhbw xmm2, xmm3 ; put sign back to subtraction
movdqa [rdi], xmm0 ; store difference
movdqa [rdi +16], xmm2 ; store difference
add rdi, 32
sub rcx, 1
jnz .submbu_loop
mov rsi, arg(2) ;vsrc
mov rax, arg(5) ;vpred
mov rcx, 4
;v
.submbv_loop:
movq xmm0, [rsi] ; src
movq xmm2, [rsi+rdx] ; src -- next line
movq xmm1, [rax] ; pred
movq xmm3, [rax+rbx] ; pred -- next line
lea rsi, [rsi + rdx*2]
lea rax, [rax + rbx*2]
punpcklqdq xmm0, xmm2
punpcklqdq xmm1, xmm3
movdqa xmm2, xmm0
psubb xmm0, xmm1 ; subtraction with sign missed
pxor xmm1, xmm4 ;convert to signed values
pxor xmm2, xmm4
pcmpgtb xmm1, xmm2 ; obtain sign information
movdqa xmm2, xmm0
movdqa xmm3, xmm1
punpcklbw xmm0, xmm1 ; put sign back to subtraction
punpckhbw xmm2, xmm3 ; put sign back to subtraction
movdqa [rdi], xmm0 ; store difference
movdqa [rdi +16], xmm2 ; store difference
add rdi, 32
sub rcx, 1
jnz .submbv_loop
pop rbx
; begin epilog
pop rdi
pop rsi
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
SECTION_RODATA
align 16
t80:
times 16 db 0x80