; ; 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