ref: 734c3d2b66b063e9ebcf0bc4ceb9ae3a9baacd31
dir: /vp8/common/x86/iwalsh_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"
SECTION .text
;void vp8_short_inv_walsh4x4_sse2(short *input, short *output)
global sym(vp8_short_inv_walsh4x4_sse2) PRIVATE
sym(vp8_short_inv_walsh4x4_sse2):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 2
; end prolog
mov rcx, arg(0)
mov rdx, arg(1)
mov rax, 30003h
movdqa xmm0, [rcx + 0] ;ip[4] ip[0]
movdqa xmm1, [rcx + 16] ;ip[12] ip[8]
pshufd xmm2, xmm1, 4eh ;ip[8] ip[12]
movdqa xmm3, xmm0 ;ip[4] ip[0]
paddw xmm0, xmm2 ;ip[4]+ip[8] ip[0]+ip[12] aka b1 a1
psubw xmm3, xmm2 ;ip[4]-ip[8] ip[0]-ip[12] aka c1 d1
movdqa xmm4, xmm0
punpcklqdq xmm0, xmm3 ;d1 a1
punpckhqdq xmm4, xmm3 ;c1 b1
movdqa xmm1, xmm4 ;c1 b1
paddw xmm4, xmm0 ;dl+cl a1+b1 aka op[4] op[0]
psubw xmm0, xmm1 ;d1-c1 a1-b1 aka op[12] op[8]
;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
; 13 12 11 10 03 02 01 00
;
; 33 32 31 30 23 22 21 20
;
movdqa xmm3, xmm4 ; 13 12 11 10 03 02 01 00
punpcklwd xmm4, xmm0 ; 23 03 22 02 21 01 20 00
punpckhwd xmm3, xmm0 ; 33 13 32 12 31 11 30 10
movdqa xmm1, xmm4 ; 23 03 22 02 21 01 20 00
punpcklwd xmm4, xmm3 ; 31 21 11 01 30 20 10 00
punpckhwd xmm1, xmm3 ; 33 23 13 03 32 22 12 02
;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
movd xmm0, eax
pshufd xmm2, xmm1, 4eh ;ip[8] ip[12]
movdqa xmm3, xmm4 ;ip[4] ip[0]
pshufd xmm0, xmm0, 0 ;03 03 03 03 03 03 03 03
paddw xmm4, xmm2 ;ip[4]+ip[8] ip[0]+ip[12] aka b1 a1
psubw xmm3, xmm2 ;ip[4]-ip[8] ip[0]-ip[12] aka c1 d1
movdqa xmm5, xmm4
punpcklqdq xmm4, xmm3 ;d1 a1
punpckhqdq xmm5, xmm3 ;c1 b1
movdqa xmm1, xmm5 ;c1 b1
paddw xmm5, xmm4 ;dl+cl a1+b1 aka op[4] op[0]
psubw xmm4, xmm1 ;d1-c1 a1-b1 aka op[12] op[8]
paddw xmm5, xmm0
paddw xmm4, xmm0
psraw xmm5, 3
psraw xmm4, 3
movd eax, xmm5
movd ecx, xmm4
psrldq xmm5, 4
psrldq xmm4, 4
mov word ptr[rdx+32*0], ax
mov word ptr[rdx+32*2], cx
shr eax, 16
shr ecx, 16
mov word ptr[rdx+32*4], ax
mov word ptr[rdx+32*6], cx
movd eax, xmm5
movd ecx, xmm4
psrldq xmm5, 4
psrldq xmm4, 4
mov word ptr[rdx+32*8], ax
mov word ptr[rdx+32*10], cx
shr eax, 16
shr ecx, 16
mov word ptr[rdx+32*12], ax
mov word ptr[rdx+32*14], cx
movd eax, xmm5
movd ecx, xmm4
psrldq xmm5, 4
psrldq xmm4, 4
mov word ptr[rdx+32*1], ax
mov word ptr[rdx+32*3], cx
shr eax, 16
shr ecx, 16
mov word ptr[rdx+32*5], ax
mov word ptr[rdx+32*7], cx
movd eax, xmm5
movd ecx, xmm4
mov word ptr[rdx+32*9], ax
mov word ptr[rdx+32*11], cx
shr eax, 16
shr ecx, 16
mov word ptr[rdx+32*13], ax
mov word ptr[rdx+32*15], cx
; begin epilog
UNSHADOW_ARGS
pop rbp
ret