dct-a.asm.svn-base

关于x.264视频格式源码

;*****************************************************************************
;* dct.asm: h264 encoder library
;*****************************************************************************
;* Copyright (C) 2003 x264 project
;* $Id: dct.asm,v 1.1 2004/06/03 19:27:07 fenrir Exp $
;*
;* Authors: Laurent Aimar <[e-mail]> (initial version)
;*          Min Chen <chenm001.163.com> (converted to nasm)
;*          Loren Merritt <[e-mail]> (dct8)
;*
;* This program is free software; you can redistribute it and/or modify
;* it under the terms of the GNU General Public License as published by
;* the Free Software Foundation; either version 2 of the License, or
;* (at your option) any later version.
;*
;* This program is distributed in the hope that it will be useful,
;* but WITHOUT ANY WARRANTY; without even the implied warranty of
;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;* GNU General Public License for more details.
;*
;* You should have received a copy of the GNU General Public License
;* along with this program; if not, write to the Free Software
;* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
;*****************************************************************************

;*****************************************************************************
;*                                                                           *
;*  Revision history:                                                        *
;*                                                                           *
;*  2004.04.28  portab all 4x4 function to nasm (CM)                         *
;*                                                                           *
;*****************************************************************************

BITS 64

;=============================================================================
; Macros and other preprocessor constants
;=============================================================================

%include "amd64inc.asm"

%macro MMX_ZERO 1
    pxor    %1, %1
%endmacro

%macro MMX_LOAD_DIFF_4P 5
    movd        %1, %4
    punpcklbw   %1, %3
    movd        %2, %5
    punpcklbw   %2, %3
    psubw       %1, %2
%endmacro

%macro MMX_LOAD_DIFF_8P 5
    movq        %1, %4
    punpcklbw   %1, %3
    movq        %2, %5
    punpcklbw   %2, %3
    psubw       %1, %2
%endmacro

%macro MMX_SUMSUB_BA 2
    paddw   %1, %2
    paddw   %2, %2
    psubw   %2, %1
%endmacro

%macro MMX_SUMSUB_BADC 4
    paddw   %1, %2
    paddw   %3, %4
    paddw   %2, %2
    paddw   %4, %4
    psubw   %2, %1
    psubw   %4, %3
%endmacro

%macro MMX_SUMSUB2_AB 3
    movq    %3, %1
    paddw   %1, %1
    paddw   %1, %2
    psubw   %3, %2
    psubw   %3, %2
%endmacro

%macro MMX_SUMSUBD2_AB 4
    movq    %4, %1
    movq    %3, %2
    psraw   %2, 1
    psraw   %4, 1
    paddw   %1, %2
    psubw   %4, %3
%endmacro

%macro SBUTTERFLY 5
    mov%1       %5, %3
    punpckl%2   %3, %4
    punpckh%2   %5, %4
%endmacro

;-----------------------------------------------------------------------------
; input ABCD output ADTC
;-----------------------------------------------------------------------------
%macro MMX_TRANSPOSE 5
    SBUTTERFLY q, wd, %1, %2, %5
    SBUTTERFLY q, wd, %3, %4, %2
    SBUTTERFLY q, dq, %1, %3, %4
    SBUTTERFLY q, dq, %5, %2, %3
%endmacro

;-----------------------------------------------------------------------------
; input ABCDEFGH output AFHDTECB 
;-----------------------------------------------------------------------------
%macro SSE2_TRANSPOSE8x8 9
    SBUTTERFLY dqa, wd, %1, %2, %9
    SBUTTERFLY dqa, wd, %3, %4, %2
    SBUTTERFLY dqa, wd, %5, %6, %4
    SBUTTERFLY dqa, wd, %7, %8, %6
    SBUTTERFLY dqa, dq, %1, %3, %8
    SBUTTERFLY dqa, dq, %9, %2, %3
    SBUTTERFLY dqa, dq, %5, %7, %2
    SBUTTERFLY dqa, dq, %4, %6, %7
    SBUTTERFLY dqa, qdq, %1, %5, %6
    SBUTTERFLY dqa, qdq, %9, %4, %5
    SBUTTERFLY dqa, qdq, %8, %2, %4
    SBUTTERFLY dqa, qdq, %3, %7, %2
%endmacro

%macro MMX_STORE_DIFF_4P 5
    paddw       %1, %3
    psraw       %1, 6
    movd        %2, %5
    punpcklbw   %2, %4
    paddsw      %1, %2
    packuswb    %1, %1
    movd        %5, %1
%endmacro

%macro MMX_STORE_DIFF_8P 4
    psraw       %1, 6
    movq        %2, %4
    punpcklbw   %2, %3
    paddsw      %1, %2
    packuswb    %1, %1  
    movq        %4, %1
%endmacro

;=============================================================================
; Constants
;=============================================================================

SECTION .rodata align=16
pw_1:  times 8 dw 1
pw_32: times 8 dw 32

;=============================================================================
; Code
;=============================================================================

SECTION .text

;-----------------------------------------------------------------------------
;   void x264_dct4x4dc_mmx( int16_t d[4][4] )
;-----------------------------------------------------------------------------
cglobal x264_dct4x4dc_mmx
    movq    mm0,        [parm1q+ 0]
    movq    mm1,        [parm1q+ 8]
    movq    mm2,        [parm1q+16]
    movq    mm3,        [parm1q+24]

    MMX_SUMSUB_BADC     mm1, mm0, mm3, mm2          ; mm1=s01  mm0=d01  mm3=s23  mm2=d23
    MMX_SUMSUB_BADC     mm3, mm1, mm2, mm0          ; mm3=s01+s23  mm1=s01-s23  mm2=d01+d23  mm0=d01-d23

    MMX_TRANSPOSE       mm3, mm1, mm0, mm2, mm4     ; in: mm3, mm1, mm0, mm2  out: mm3, mm2, mm4, mm0 

    MMX_SUMSUB_BADC     mm2, mm3, mm0, mm4          ; mm2=s01  mm3=d01  mm0=s23  mm4=d23
    MMX_SUMSUB_BADC     mm0, mm2, mm4, mm3          ; mm0=s01+s23  mm2=s01-s23  mm4=d01+d23  mm3=d01-d23

    movq    mm6,        [pw_1 GLOBAL]
    paddw   mm0,        mm6
    paddw   mm2,        mm6
    psraw   mm0,        1
    movq    [parm1q+ 0],mm0
    psraw   mm2,        1
    movq    [parm1q+ 8],mm2
    paddw   mm3,        mm6
    paddw   mm4,        mm6
    psraw   mm3,        1
    movq    [parm1q+16],mm3
    psraw   mm4,        1
    movq    [parm1q+24],mm4
    ret

;-----------------------------------------------------------------------------
;   void x264_idct4x4dc_mmx( int16_t d[4][4] )
;-----------------------------------------------------------------------------
cglobal x264_idct4x4dc_mmx
    movq    mm0, [parm1q+ 0]
    movq    mm1, [parm1q+ 8]
    movq    mm2, [parm1q+16]
    movq    mm3, [parm1q+24]

    MMX_SUMSUB_BADC     mm1, mm0, mm3, mm2          ; mm1=s01  mm0=d01  mm3=s23  mm2=d23
    MMX_SUMSUB_BADC     mm3, mm1, mm2, mm0          ; mm3=s01+s23 mm1=s01-s23 mm2=d01+d23 mm0=d01-d23

    MMX_TRANSPOSE       mm3, mm1, mm0, mm2, mm4     ; in: mm3, mm1, mm0, mm2  out: mm3, mm2, mm4, mm0 

    MMX_SUMSUB_BADC     mm2, mm3, mm0, mm4          ; mm2=s01  mm3=d01  mm0=s23  mm4=d23
    MMX_SUMSUB_BADC     mm0, mm2, mm4, mm3          ; mm0=s01+s23  mm2=s01-s23  mm4=d01+d23  mm3=d01-d23

    movq    [parm1q+ 0], mm0
    movq    [parm1q+ 8], mm2
    movq    [parm1q+16], mm3
    movq    [parm1q+24], mm4
    ret

;-----------------------------------------------------------------------------
;   void x264_sub4x4_dct_mmx( int16_t dct[4][4], uint8_t *pix1, uint8_t *pix2 )
;-----------------------------------------------------------------------------
cglobal x264_sub4x4_dct_mmx
    MMX_ZERO    mm7

    ; Load 4 lines
    MMX_LOAD_DIFF_4P    mm0, mm6, mm7, [parm2q+0*FENC_STRIDE], [parm3q+0*FDEC_STRIDE]
    MMX_LOAD_DIFF_4P    mm1, mm6, mm7, [parm2q+1*FENC_STRIDE], [parm3q+1*FDEC_STRIDE]
    MMX_LOAD_DIFF_4P    mm2, mm6, mm7, [parm2q+2*FENC_STRIDE], [parm3q+2*FDEC_STRIDE]
    MMX_LOAD_DIFF_4P    mm3, mm6, mm7, [parm2q+3*FENC_STRIDE], [parm3q+3*FDEC_STRIDE]

    MMX_SUMSUB_BADC     mm3, mm0, mm2, mm1          ; mm3=s03  mm0=d03  mm2=s12  mm1=d12

    MMX_SUMSUB_BA       mm2, mm3                    ; mm2=s03+s12      mm3=s03-s12
    MMX_SUMSUB2_AB      mm0, mm1, mm4               ; mm0=2.d03+d12    mm4=d03-2.d12

    ; transpose in: mm2, mm0, mm3, mm4, out: mm2, mm4, mm1, mm3
    MMX_TRANSPOSE       mm2, mm0, mm3, mm4, mm1

    MMX_SUMSUB_BADC     mm3, mm2, mm1, mm4          ; mm3=s03  mm2=d03  mm1=s12  mm4=d12

    MMX_SUMSUB_BA       mm1, mm3                    ; mm1=s03+s12      mm3=s03-s12
    MMX_SUMSUB2_AB      mm2, mm4, mm0               ; mm2=2.d03+d12    mm0=d03-2.d12

    movq    [parm1q+ 0], mm1
    movq    [parm1q+ 8], mm2
    movq    [parm1q+16], mm3
    movq    [parm1q+24], mm0
    ret

;-----------------------------------------------------------------------------
;   void x264_add4x4_idct_mmx( uint8_t *p_dst, int16_t dct[4][4] )
;-----------------------------------------------------------------------------
cglobal x264_add4x4_idct_mmx
    ; Load dct coeffs
    movq    mm0, [parm2q+ 0] ; dct
    movq    mm1, [parm2q+ 8]
    movq    mm2, [parm2q+16]
    movq    mm3, [parm2q+24]
    
    MMX_SUMSUB_BA       mm2, mm0                        ; mm2=s02  mm0=d02
    MMX_SUMSUBD2_AB     mm1, mm3, mm5, mm4              ; mm1=s13  mm4=d13 ( well 1 + 3>>1 and 1>>1 + 3)

    MMX_SUMSUB_BADC     mm1, mm2, mm4, mm0              ; mm1=s02+s13  mm2=s02-s13  mm4=d02+d13  mm0=d02-d13