ref: 397aad3ec28020a9b766e362e061701783c9633e
dir: /vp8/common/x86/idctllm_mmx.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"
; /****************************************************************************
; * Notes:
; *
; * This implementation makes use of 16 bit fixed point verio of two multiply
; * constants:
; * 1. sqrt(2) * cos (pi/8)
; * 2. sqrt(2) * sin (pi/8)
; * Becuase the first constant is bigger than 1, to maintain the same 16 bit
; * fixed point prrcision as the second one, we use a trick of
; * x * a = x + x*(a-1)
; * so
; * x * sqrt(2) * cos (pi/8) = x + x * (sqrt(2) *cos(pi/8)-1).
; *
; * For the second constant, becuase of the 16bit version is 35468, which
; * is bigger than 32768, in signed 16 bit multiply, it become a negative
; * number.
; * (x * (unsigned)35468 >> 16) = x * (signed)35468 >> 16 + x
; *
; **************************************************************************/
;void short_idct4x4llm_mmx(short *input, short *output, int pitch)
global sym(vp8_short_idct4x4llm_mmx)
sym(vp8_short_idct4x4llm_mmx):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 3
GET_GOT rbx
; end prolog
mov rax, arg(0) ;input
mov rdx, arg(1) ;output
movq mm0, [rax ]
movq mm1, [rax+ 8]
movq mm2, [rax+16]
movq mm3, [rax+24]
movsxd rax, dword ptr arg(2) ;pitch
psubw mm0, mm2 ; b1= 0-2
paddw mm2, mm2 ;
movq mm5, mm1
paddw mm2, mm0 ; a1 =0+2
pmulhw mm5, [x_s1sqr2 GLOBAL] ;
paddw mm5, mm1 ; ip1 * sin(pi/8) * sqrt(2)
movq mm7, mm3 ;
pmulhw mm7, [x_c1sqr2less1 GLOBAL] ;
paddw mm7, mm3 ; ip3 * cos(pi/8) * sqrt(2)
psubw mm7, mm5 ; c1
movq mm5, mm1
movq mm4, mm3
pmulhw mm5, [x_c1sqr2less1 GLOBAL]
paddw mm5, mm1
pmulhw mm3, [x_s1sqr2 GLOBAL]
paddw mm3, mm4
paddw mm3, mm5 ; d1
movq mm6, mm2 ; a1
movq mm4, mm0 ; b1
paddw mm2, mm3 ;0
paddw mm4, mm7 ;1
psubw mm0, mm7 ;2
psubw mm6, mm3 ;3
movq mm1, mm2 ; 03 02 01 00
movq mm3, mm4 ; 23 22 21 20
punpcklwd mm1, mm0 ; 11 01 10 00
punpckhwd mm2, mm0 ; 13 03 12 02
punpcklwd mm3, mm6 ; 31 21 30 20
punpckhwd mm4, mm6 ; 33 23 32 22
movq mm0, mm1 ; 11 01 10 00
movq mm5, mm2 ; 13 03 12 02
punpckldq mm0, mm3 ; 30 20 10 00
punpckhdq mm1, mm3 ; 31 21 11 01
punpckldq mm2, mm4 ; 32 22 12 02
punpckhdq mm5, mm4 ; 33 23 13 03
movq mm3, mm5 ; 33 23 13 03
psubw mm0, mm2 ; b1= 0-2
paddw mm2, mm2 ;
movq mm5, mm1
paddw mm2, mm0 ; a1 =0+2
pmulhw mm5, [x_s1sqr2 GLOBAL] ;
paddw mm5, mm1 ; ip1 * sin(pi/8) * sqrt(2)
movq mm7, mm3 ;
pmulhw mm7, [x_c1sqr2less1 GLOBAL] ;
paddw mm7, mm3 ; ip3 * cos(pi/8) * sqrt(2)
psubw mm7, mm5 ; c1
movq mm5, mm1
movq mm4, mm3
pmulhw mm5, [x_c1sqr2less1 GLOBAL]
paddw mm5, mm1
pmulhw mm3, [x_s1sqr2 GLOBAL]
paddw mm3, mm4
paddw mm3, mm5 ; d1
paddw mm0, [fours GLOBAL]
paddw mm2, [fours GLOBAL]
movq mm6, mm2 ; a1
movq mm4, mm0 ; b1
paddw mm2, mm3 ;0
paddw mm4, mm7 ;1
psubw mm0, mm7 ;2
psubw mm6, mm3 ;3
psraw mm2, 3
psraw mm0, 3
psraw mm4, 3
psraw mm6, 3
movq mm1, mm2 ; 03 02 01 00
movq mm3, mm4 ; 23 22 21 20
punpcklwd mm1, mm0 ; 11 01 10 00
punpckhwd mm2, mm0 ; 13 03 12 02
punpcklwd mm3, mm6 ; 31 21 30 20
punpckhwd mm4, mm6 ; 33 23 32 22
movq mm0, mm1 ; 11 01 10 00
movq mm5, mm2 ; 13 03 12 02
punpckldq mm0, mm3 ; 30 20 10 00
punpckhdq mm1, mm3 ; 31 21 11 01
punpckldq mm2, mm4 ; 32 22 12 02
punpckhdq mm5, mm4 ; 33 23 13 03
movq [rdx], mm0
movq [rdx+rax], mm1
movq [rdx+rax*2], mm2
add rdx, rax
movq [rdx+rax*2], mm5
; begin epilog
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
;void short_idct4x4llm_1_mmx(short *input, short *output, int pitch)
global sym(vp8_short_idct4x4llm_1_mmx)
sym(vp8_short_idct4x4llm_1_mmx):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 3
GET_GOT rbx
; end prolog
mov rax, arg(0) ;input
movd mm0, [rax]
paddw mm0, [fours GLOBAL]
mov rdx, arg(1) ;output
psraw mm0, 3
movsxd rax, dword ptr arg(2) ;pitch
punpcklwd mm0, mm0
punpckldq mm0, mm0
movq [rdx], mm0
movq [rdx+rax], mm0
movq [rdx+rax*2], mm0
add rdx, rax
movq [rdx+rax*2], mm0
; begin epilog
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
;void dc_only_idct_mmx(short input_dc, short *output, int pitch)
global sym(vp8_dc_only_idct_mmx)
sym(vp8_dc_only_idct_mmx):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 3
GET_GOT rbx
; end prolog
movd mm0, arg(0) ;input_dc
paddw mm0, [fours GLOBAL]
mov rdx, arg(1) ;output
psraw mm0, 3
movsxd rax, dword ptr arg(2) ;pitch
punpcklwd mm0, mm0
punpckldq mm0, mm0
movq [rdx], mm0
movq [rdx+rax], mm0
movq [rdx+rax*2], mm0
add rdx, rax
movq [rdx+rax*2], mm0
; begin epilog
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
SECTION_RODATA
align 16
x_s1sqr2:
times 4 dw 0x8A8C
align 16
x_c1sqr2less1:
times 4 dw 0x4E7B
align 16
fours:
times 4 dw 0x0004