267 lines
8.4 KiB
NASM
267 lines
8.4 KiB
NASM
;
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; Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
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;
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; Use of this source code is governed by a BSD-style license
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; that can be found in the LICENSE file in the root of the source
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; tree. An additional intellectual property rights grant can be found
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; in the file PATENTS. All contributing project authors may
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; be found in the AUTHORS file in the root of the source tree.
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;
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%include "vpx_ports/x86_abi_support.asm"
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; /****************************************************************************
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; * Notes:
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; *
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; * This implementation makes use of 16 bit fixed point verio of two multiply
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; * constants:
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; * 1. sqrt(2) * cos (pi/8)
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; * 2. sqrt(2) * sin (pi/8)
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; * Becuase the first constant is bigger than 1, to maintain the same 16 bit
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; * fixed point prrcision as the second one, we use a trick of
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; * x * a = x + x*(a-1)
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; * so
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; * x * sqrt(2) * cos (pi/8) = x + x * (sqrt(2) *cos(pi/8)-1).
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; *
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; * For the second constant, becuase of the 16bit version is 35468, which
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; * is bigger than 32768, in signed 16 bit multiply, it become a negative
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; * number.
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; * (x * (unsigned)35468 >> 16) = x * (signed)35468 >> 16 + x
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; *
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; **************************************************************************/
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;void short_idct4x4llm_mmx(short *input, short *output, int pitch)
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global sym(vp8_short_idct4x4llm_mmx)
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sym(vp8_short_idct4x4llm_mmx):
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push rbp
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mov rbp, rsp
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SHADOW_ARGS_TO_STACK 3
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GET_GOT rbx
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; end prolog
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mov rax, arg(0) ;input
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mov rdx, arg(1) ;output
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movq mm0, [rax ]
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movq mm1, [rax+ 8]
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movq mm2, [rax+16]
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movq mm3, [rax+24]
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movsxd rax, dword ptr arg(2) ;pitch
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psubw mm0, mm2 ; b1= 0-2
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paddw mm2, mm2 ;
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movq mm5, mm1
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paddw mm2, mm0 ; a1 =0+2
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pmulhw mm5, [x_s1sqr2 GLOBAL] ;
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paddw mm5, mm1 ; ip1 * sin(pi/8) * sqrt(2)
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movq mm7, mm3 ;
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pmulhw mm7, [x_c1sqr2less1 GLOBAL] ;
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paddw mm7, mm3 ; ip3 * cos(pi/8) * sqrt(2)
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psubw mm7, mm5 ; c1
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movq mm5, mm1
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movq mm4, mm3
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pmulhw mm5, [x_c1sqr2less1 GLOBAL]
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paddw mm5, mm1
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pmulhw mm3, [x_s1sqr2 GLOBAL]
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paddw mm3, mm4
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paddw mm3, mm5 ; d1
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movq mm6, mm2 ; a1
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movq mm4, mm0 ; b1
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paddw mm2, mm3 ;0
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paddw mm4, mm7 ;1
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psubw mm0, mm7 ;2
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psubw mm6, mm3 ;3
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movq mm1, mm2 ; 03 02 01 00
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movq mm3, mm4 ; 23 22 21 20
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punpcklwd mm1, mm0 ; 11 01 10 00
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punpckhwd mm2, mm0 ; 13 03 12 02
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punpcklwd mm3, mm6 ; 31 21 30 20
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punpckhwd mm4, mm6 ; 33 23 32 22
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movq mm0, mm1 ; 11 01 10 00
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movq mm5, mm2 ; 13 03 12 02
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punpckldq mm0, mm3 ; 30 20 10 00
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punpckhdq mm1, mm3 ; 31 21 11 01
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punpckldq mm2, mm4 ; 32 22 12 02
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punpckhdq mm5, mm4 ; 33 23 13 03
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movq mm3, mm5 ; 33 23 13 03
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psubw mm0, mm2 ; b1= 0-2
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paddw mm2, mm2 ;
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movq mm5, mm1
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paddw mm2, mm0 ; a1 =0+2
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pmulhw mm5, [x_s1sqr2 GLOBAL] ;
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paddw mm5, mm1 ; ip1 * sin(pi/8) * sqrt(2)
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movq mm7, mm3 ;
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pmulhw mm7, [x_c1sqr2less1 GLOBAL] ;
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paddw mm7, mm3 ; ip3 * cos(pi/8) * sqrt(2)
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psubw mm7, mm5 ; c1
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movq mm5, mm1
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movq mm4, mm3
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pmulhw mm5, [x_c1sqr2less1 GLOBAL]
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paddw mm5, mm1
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pmulhw mm3, [x_s1sqr2 GLOBAL]
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paddw mm3, mm4
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paddw mm3, mm5 ; d1
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paddw mm0, [fours GLOBAL]
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paddw mm2, [fours GLOBAL]
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movq mm6, mm2 ; a1
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movq mm4, mm0 ; b1
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paddw mm2, mm3 ;0
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paddw mm4, mm7 ;1
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psubw mm0, mm7 ;2
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psubw mm6, mm3 ;3
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psraw mm2, 3
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psraw mm0, 3
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psraw mm4, 3
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psraw mm6, 3
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movq mm1, mm2 ; 03 02 01 00
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movq mm3, mm4 ; 23 22 21 20
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punpcklwd mm1, mm0 ; 11 01 10 00
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punpckhwd mm2, mm0 ; 13 03 12 02
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punpcklwd mm3, mm6 ; 31 21 30 20
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punpckhwd mm4, mm6 ; 33 23 32 22
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movq mm0, mm1 ; 11 01 10 00
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movq mm5, mm2 ; 13 03 12 02
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punpckldq mm0, mm3 ; 30 20 10 00
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punpckhdq mm1, mm3 ; 31 21 11 01
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punpckldq mm2, mm4 ; 32 22 12 02
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punpckhdq mm5, mm4 ; 33 23 13 03
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movq [rdx], mm0
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movq [rdx+rax], mm1
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movq [rdx+rax*2], mm2
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add rdx, rax
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movq [rdx+rax*2], mm5
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; begin epilog
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RESTORE_GOT
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UNSHADOW_ARGS
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pop rbp
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ret
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;void short_idct4x4llm_1_mmx(short *input, short *output, int pitch)
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global sym(vp8_short_idct4x4llm_1_mmx)
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sym(vp8_short_idct4x4llm_1_mmx):
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push rbp
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mov rbp, rsp
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SHADOW_ARGS_TO_STACK 3
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GET_GOT rbx
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; end prolog
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mov rax, arg(0) ;input
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movd mm0, [rax]
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paddw mm0, [fours GLOBAL]
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mov rdx, arg(1) ;output
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psraw mm0, 3
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movsxd rax, dword ptr arg(2) ;pitch
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punpcklwd mm0, mm0
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punpckldq mm0, mm0
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movq [rdx], mm0
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movq [rdx+rax], mm0
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movq [rdx+rax*2], mm0
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add rdx, rax
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movq [rdx+rax*2], mm0
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; begin epilog
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RESTORE_GOT
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UNSHADOW_ARGS
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pop rbp
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ret
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;void dc_only_idct_mmx(short input_dc, short *output, int pitch)
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global sym(vp8_dc_only_idct_mmx)
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sym(vp8_dc_only_idct_mmx):
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push rbp
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mov rbp, rsp
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SHADOW_ARGS_TO_STACK 3
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GET_GOT rbx
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; end prolog
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movd mm0, arg(0) ;input_dc
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paddw mm0, [fours GLOBAL]
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mov rdx, arg(1) ;output
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psraw mm0, 3
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movsxd rax, dword ptr arg(2) ;pitch
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punpcklwd mm0, mm0
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punpckldq mm0, mm0
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movq [rdx], mm0
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movq [rdx+rax], mm0
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movq [rdx+rax*2], mm0
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add rdx, rax
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movq [rdx+rax*2], mm0
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; begin epilog
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RESTORE_GOT
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UNSHADOW_ARGS
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pop rbp
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ret
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SECTION_RODATA
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align 16
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x_s1sqr2:
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times 4 dw 0x8A8C
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align 16
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x_c1sqr2less1:
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times 4 dw 0x4E7B
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align 16
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fours:
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times 4 dw 0x0004
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