ref: 9fdfb8e92823abadc54d825d0603a7e9fd344520
dir: /vp8/encoder/x86/dct_sse2.asm/
;
; Copyright (c) 2010 The VP8 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"
global sym(vp8_short_fdct4x4_wmt)
%define DCTCONSTANTSBITS (16)
%define DCTROUNDINGVALUE (1<< (DCTCONSTANTSBITS-1))
%define x_c1 (60547) ; cos(pi /8) * (1<<15)
%define x_c2 (46341) ; cos(pi*2/8) * (1<<15)
%define x_c3 (25080) ; cos(pi*3/8) * (1<<15)
%define _1STSTAGESHIFT 14
%define _2NDSTAGESHIFT 16
;; using matrix multiply
;void vp8_short_fdct4x4_wmt(short *input, short *output)
sym(vp8_short_fdct4x4_wmt):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 2
GET_GOT rbx
; end prolog
mov rax, arg(0) ;input
mov rcx, arg(1) ;output
lea rdx, [dct_matrix_sse2 GLOBAL]
movdqu xmm0, [rax ]
movdqu xmm1, [rax+16]
; first column
movdqa xmm2, xmm0
movdqa xmm7, [rdx]
pmaddwd xmm2, xmm7
movdqa xmm3, xmm1
pmaddwd xmm3, xmm7
movdqa xmm4, xmm2
punpckldq xmm2, xmm3
punpckhdq xmm4, xmm3
movdqa xmm3, xmm2
punpckldq xmm2, xmm4
punpckhdq xmm3, xmm4
paddd xmm2, xmm3
paddd xmm2, XMMWORD PTR [dct1st_stage_rounding_sse2 GLOBAL]
psrad xmm2, _1STSTAGESHIFT
;second column
movdqa xmm3, xmm0
pmaddwd xmm3, [rdx+16]
movdqa xmm4, xmm1
pmaddwd xmm4, [rdx+16]
movdqa xmm5, xmm3
punpckldq xmm3, xmm4
punpckhdq xmm5, xmm4
movdqa xmm4, xmm3
punpckldq xmm3, xmm5
punpckhdq xmm4, xmm5
paddd xmm3, xmm4
paddd xmm3, XMMWORD PTR [dct1st_stage_rounding_sse2 GLOBAL]
psrad xmm3, _1STSTAGESHIFT
packssdw xmm2, xmm3
;third column
movdqa xmm3, xmm0
pmaddwd xmm3, [rdx+32]
movdqa xmm4, xmm1
pmaddwd xmm4, [rdx+32]
movdqa xmm5, xmm3
punpckldq xmm3, xmm4
punpckhdq xmm5, xmm4
movdqa xmm4, xmm3
punpckldq xmm3, xmm5
punpckhdq xmm4, xmm5
paddd xmm3, xmm4
paddd xmm3, XMMWORD PTR [dct1st_stage_rounding_sse2 GLOBAL]
psrad xmm3, _1STSTAGESHIFT
;fourth column (this is the last column, so we do not have save the source any more)
pmaddwd xmm0, [rdx+48]
pmaddwd xmm1, [rdx+48]
movdqa xmm4, xmm0
punpckldq xmm0, xmm1
punpckhdq xmm4, xmm1
movdqa xmm1, xmm0
punpckldq xmm0, xmm4
punpckhdq xmm1, xmm4
paddd xmm0, xmm1
paddd xmm0, XMMWORD PTR [dct1st_stage_rounding_sse2 GLOBAL]
psrad xmm0, _1STSTAGESHIFT
packssdw xmm3, xmm0
; done with one pass
; now start second pass
movdqa xmm0, xmm2
movdqa xmm1, xmm3
pmaddwd xmm2, xmm7
pmaddwd xmm3, xmm7
movdqa xmm4, xmm2
punpckldq xmm2, xmm3
punpckhdq xmm4, xmm3
movdqa xmm3, xmm2
punpckldq xmm2, xmm4
punpckhdq xmm3, xmm4
paddd xmm2, xmm3
paddd xmm2, XMMWORD PTR [dct2nd_stage_rounding_sse2 GLOBAL]
psrad xmm2, _2NDSTAGESHIFT
;second column
movdqa xmm3, xmm0
pmaddwd xmm3, [rdx+16]
movdqa xmm4, xmm1
pmaddwd xmm4, [rdx+16]
movdqa xmm5, xmm3
punpckldq xmm3, xmm4
punpckhdq xmm5, xmm4
movdqa xmm4, xmm3
punpckldq xmm3, xmm5
punpckhdq xmm4, xmm5
paddd xmm3, xmm4
paddd xmm3, XMMWORD PTR [dct2nd_stage_rounding_sse2 GLOBAL]
psrad xmm3, _2NDSTAGESHIFT
packssdw xmm2, xmm3
movdqu [rcx], xmm2
;third column
movdqa xmm3, xmm0
pmaddwd xmm3, [rdx+32]
movdqa xmm4, xmm1
pmaddwd xmm4, [rdx+32]
movdqa xmm5, xmm3
punpckldq xmm3, xmm4
punpckhdq xmm5, xmm4
movdqa xmm4, xmm3
punpckldq xmm3, xmm5
punpckhdq xmm4, xmm5
paddd xmm3, xmm4
paddd xmm3, XMMWORD PTR [dct2nd_stage_rounding_sse2 GLOBAL]
psrad xmm3, _2NDSTAGESHIFT
;fourth column
pmaddwd xmm0, [rdx+48]
pmaddwd xmm1, [rdx+48]
movdqa xmm4, xmm0
punpckldq xmm0, xmm1
punpckhdq xmm4, xmm1
movdqa xmm1, xmm0
punpckldq xmm0, xmm4
punpckhdq xmm1, xmm4
paddd xmm0, xmm1
paddd xmm0, XMMWORD PTR [dct2nd_stage_rounding_sse2 GLOBAL]
psrad xmm0, _2NDSTAGESHIFT
packssdw xmm3, xmm0
movdqu [rcx+16], xmm3
mov rsp, rbp
; begin epilog
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
SECTION_RODATA
;static unsigned int dct1st_stage_rounding_sse2[4] =
align 16
dct1st_stage_rounding_sse2:
times 4 dd 8192
;static unsigned int dct2nd_stage_rounding_sse2[4] =
align 16
dct2nd_stage_rounding_sse2:
times 4 dd 32768
;static short dct_matrix_sse2[4][8]=
align 16
dct_matrix_sse2:
times 8 dw 23170
dw 30274
dw 12540
dw -12540
dw -30274
dw 30274
dw 12540
dw -12540
dw -30274
dw 23170
times 2 dw -23170
times 2 dw 23170
times 2 dw -23170
dw 23170
dw 12540
dw -30274
dw 30274
dw -12540
dw 12540
dw -30274
dw 30274
dw -12540