;*****************************************************************************;* cabac-a.asm: h264 encoder library;*****************************************************************************;* Copyright (C) 2008 x264 project;*;* Author: Loren Merritt <lorenm@u.washington.edu>;*         Jason Garrett-Glaser <darkshikari@gmail.com>;*;* 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., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.;*****************************************************************************%include "x86inc.asm"SECTION_RODATASECTION .textcextern x264_cabac_range_lpscextern x264_cabac_transitioncextern x264_cabac_renorm_shift; t3 must be ecx, since it's used for shift.%ifdef WIN64    DECLARE_REG_TMP 3,1,2,0,4,5,6,10    %define pointer resq%elifdef ARCH_X86_64    DECLARE_REG_TMP 0,1,2,3,4,5,6,10    %define pointer resq%else    DECLARE_REG_TMP 0,3,2,1,4,5,6,3    %define pointer resd%endifstruc cb    .low: resd 1    .range: resd 1    .queue: resd 1    .bytes_outstanding: resd 1    .start: pointer 1    .p: pointer 1    .end: pointer 1    align 16, resb 1    .bits_encoded: resd 1    .state: resb 460endstruc%macro LOAD_GLOBAL 4%ifdef PIC    ; this would be faster if the arrays were declared in asm, so that I didn't have to duplicate the lea    lea   r11, [%2 GLOBAL]    %ifnidn %3, 0    add   r11, %3    %endif    movzx %1, byte [r11+%4]%else    movzx %1, byte [%2+%3+%4]%endif%endmacrocglobal x264_cabac_encode_decision_asm, 0,7    movifnidn t0,  r0mp    movifnidn t1d, r1m    mov   t5d, [t0+cb.range]    movzx t3d, byte [t0+cb.state+t1]    mov   t4d, t5d    shr   t5d, 6    LOAD_GLOBAL t5d, x264_cabac_range_lps-4, t5, t3*4    sub   t4d, t5d    mov   t6d, t3d    shr   t6d, 6    movifnidn t2d, r2m    cmp   t6d, t2d    mov   t6d, [t0+cb.low]    lea   t7,  [t6+t4]    cmovne t4d, t5d    cmovne t6d, t7d    LOAD_GLOBAL t3d, x264_cabac_transition, t2, t3*2    movifnidn t1d, r1m    mov   [t0+cb.state+t1], t3b.renorm:    mov   t3d, t4d    shr   t3d, 3    LOAD_GLOBAL t3d, x264_cabac_renorm_shift, 0, t3    shl   t4d, t3b    shl   t6d, t3b    add   t3d, [t0+cb.queue]    mov   [t0+cb.range], t4d    mov   [t0+cb.low], t6d    mov   [t0+cb.queue], t3d    cmp   t3d, 8    jge .putbyte    REP_RET.putbyte:    ; alive: t0=cb t3=queue t6=low    add   t3d, 2    mov   t1d, 1    mov   t2d, t6d    shl   t1d, t3b    shr   t2d, t3b ; out    dec   t1d    sub   t3d, 10    and   t6d, t1d    cmp   t2b, 0xff ; FIXME is a 32bit op faster?    mov   [t0+cb.queue], t3d    mov   [t0+cb.low], t6d    mov   t1d, t2d    mov   t4,  [t0+cb.p]    je .postpone    mov   t5d, [t0+cb.bytes_outstanding]    shr   t1d, 8 ; carry    add   [t4-1], t1b    test  t5d, t5d    jz .no_outstanding    dec   t1d.loop_outstanding:    mov   [t4], t1b    inc   t4    dec   t5d    jg .loop_outstanding.no_outstanding:    mov   [t4], t2b    inc   t4    mov   [t0+cb.bytes_outstanding], t5d ; is zero, but a reg has smaller opcode than an immediate    mov   [t0+cb.p], t4    RET.postpone:    inc   dword [t0+cb.bytes_outstanding]    RET