ref: 3c055612c6b97bbea36767a38b8c5261bf0c839c
dir: /vp8/common/x86/idctllm_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"
; /****************************************************************************
; * Notes:
; *
; * This implementation makes use of 16 bit fixed point version of two multiply
; * constants:
; * 1. sqrt(2) * cos (pi/8)
; * 2. sqrt(2) * sin (pi/8)
; * Because the first constant is bigger than 1, to maintain the same 16 bit
; * fixed point precision 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, because of the 16bit version is 35468, which
; * is bigger than 32768, in signed 16 bit multiply, it becomes a negative
; * number.
; * (x * (unsigned)35468 >> 16) = x * (signed)35468 >> 16 + x
; *
; **************************************************************************/
SECTION .text
;void vp8_short_idct4x4llm_mmx(short *input, unsigned char *pred,
;int pitch, unsigned char *dest,int stride)
global sym(vp8_short_idct4x4llm_mmx) PRIVATE
sym(vp8_short_idct4x4llm_mmx):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 5
GET_GOT rbx
push rsi
push rdi
; end prolog
mov rax, arg(0) ;input
mov rsi, arg(1) ;pred
movq mm0, [rax ]
movq mm1, [rax+ 8]
movq mm2, [rax+16]
movq mm3, [rax+24]
%if 0
pxor mm7, mm7
movq [rax], mm7
movq [rax+8], mm7
movq [rax+16],mm7
movq [rax+24],mm7
%endif
movsxd rax, dword ptr arg(2) ;pitch
mov rdx, arg(3) ;dest
movsxd rdi, dword ptr arg(4) ;stride
psubw mm0, mm2 ; b1= 0-2
paddw mm2, mm2 ;
movq mm5, mm1
paddw mm2, mm0 ; a1 =0+2
pmulhw mm5, [GLOBAL(x_s1sqr2)];
paddw mm5, mm1 ; ip1 * sin(pi/8) * sqrt(2)
movq mm7, mm3 ;
pmulhw mm7, [GLOBAL(x_c1sqr2less1)];
paddw mm7, mm3 ; ip3 * cos(pi/8) * sqrt(2)
psubw mm7, mm5 ; c1
movq mm5, mm1
movq mm4, mm3
pmulhw mm5, [GLOBAL(x_c1sqr2less1)]
paddw mm5, mm1
pmulhw mm3, [GLOBAL(x_s1sqr2)]
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, [GLOBAL(x_s1sqr2)];
paddw mm5, mm1 ; ip1 * sin(pi/8) * sqrt(2)
movq mm7, mm3 ;
pmulhw mm7, [GLOBAL(x_c1sqr2less1)];
paddw mm7, mm3 ; ip3 * cos(pi/8) * sqrt(2)
psubw mm7, mm5 ; c1
movq mm5, mm1
movq mm4, mm3
pmulhw mm5, [GLOBAL(x_c1sqr2less1)]
paddw mm5, mm1
pmulhw mm3, [GLOBAL(x_s1sqr2)]
paddw mm3, mm4
paddw mm3, mm5 ; d1
paddw mm0, [GLOBAL(fours)]
paddw mm2, [GLOBAL(fours)]
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
pxor mm7, mm7
movd mm4, [rsi]
punpcklbw mm4, mm7
paddsw mm0, mm4
packuswb mm0, mm7
movd [rdx], mm0
movd mm4, [rsi+rax]
punpcklbw mm4, mm7
paddsw mm1, mm4
packuswb mm1, mm7
movd [rdx+rdi], mm1
movd mm4, [rsi+2*rax]
punpcklbw mm4, mm7
paddsw mm2, mm4
packuswb mm2, mm7
movd [rdx+rdi*2], mm2
add rdx, rdi
add rsi, rax
movd mm4, [rsi+2*rax]
punpcklbw mm4, mm7
paddsw mm5, mm4
packuswb mm5, mm7
movd [rdx+rdi*2], mm5
; begin epilog
pop rdi
pop rsi
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
;void vp8_dc_only_idct_add_mmx(
;short input_dc,
;unsigned char *pred_ptr,
;int pred_stride,
;unsigned char *dst_ptr,
;int stride)
global sym(vp8_dc_only_idct_add_mmx) PRIVATE
sym(vp8_dc_only_idct_add_mmx):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 5
GET_GOT rbx
; end prolog
movd mm5, arg(0) ;input_dc
mov rax, arg(1) ;pred_ptr
movsxd rdx, dword ptr arg(2) ;pred_stride
pxor mm0, mm0
paddw mm5, [GLOBAL(fours)]
lea rcx, [rdx + rdx*2]
psraw mm5, 3
punpcklwd mm5, mm5
punpckldq mm5, mm5
movd mm1, [rax]
movd mm2, [rax+rdx]
movd mm3, [rax+2*rdx]
movd mm4, [rax+rcx]
mov rax, arg(3) ;d -- destination
movsxd rdx, dword ptr arg(4) ;dst_stride
punpcklbw mm1, mm0
paddsw mm1, mm5
packuswb mm1, mm0 ; pack and unpack to saturate
lea rcx, [rdx + rdx*2]
punpcklbw mm2, mm0
paddsw mm2, mm5
packuswb mm2, mm0 ; pack and unpack to saturate
punpcklbw mm3, mm0
paddsw mm3, mm5
packuswb mm3, mm0 ; pack and unpack to saturate
punpcklbw mm4, mm0
paddsw mm4, mm5
packuswb mm4, mm0 ; pack and unpack to saturate
movd [rax], mm1
movd [rax+rdx], mm2
movd [rax+2*rdx], mm3
movd [rax+rcx], mm4
; 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