68 lines
2.0 KiB
NASM
68 lines
2.0 KiB
NASM
;*****************************************************************************
|
|
;* x86-optimized AC-3 DSP utils
|
|
;* Copyright (c) 2011 Justin Ruggles
|
|
;*
|
|
;* This file is part of FFmpeg.
|
|
;*
|
|
;* FFmpeg is free software; you can redistribute it and/or
|
|
;* modify it under the terms of the GNU Lesser General Public
|
|
;* License as published by the Free Software Foundation; either
|
|
;* version 2.1 of the License, or (at your option) any later version.
|
|
;*
|
|
;* FFmpeg 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
|
|
;* Lesser General Public License for more details.
|
|
;*
|
|
;* You should have received a copy of the GNU Lesser General Public
|
|
;* License along with FFmpeg; if not, write to the Free Software
|
|
;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
;******************************************************************************
|
|
|
|
%include "x86inc.asm"
|
|
%include "x86util.asm"
|
|
|
|
SECTION .text
|
|
|
|
;-----------------------------------------------------------------------------
|
|
; void ff_ac3_exponent_min(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
|
|
;-----------------------------------------------------------------------------
|
|
|
|
%macro AC3_EXPONENT_MIN 1
|
|
cglobal ac3_exponent_min_%1, 3,4,2, exp, reuse_blks, expn, offset
|
|
shl reuse_blksq, 8
|
|
jz .end
|
|
LOOP_ALIGN
|
|
.nextexp:
|
|
mov offsetq, reuse_blksq
|
|
mova m0, [expq+offsetq]
|
|
sub offsetq, 256
|
|
LOOP_ALIGN
|
|
.nextblk:
|
|
PMINUB m0, [expq+offsetq], m1
|
|
sub offsetq, 256
|
|
jae .nextblk
|
|
mova [expq], m0
|
|
add expq, mmsize
|
|
sub expnq, mmsize
|
|
jg .nextexp
|
|
.end:
|
|
REP_RET
|
|
%endmacro
|
|
|
|
%define PMINUB PMINUB_MMX
|
|
%define LOOP_ALIGN
|
|
INIT_MMX
|
|
AC3_EXPONENT_MIN mmx
|
|
%ifdef HAVE_MMX2
|
|
%define PMINUB PMINUB_MMXEXT
|
|
%define LOOP_ALIGN ALIGN 16
|
|
AC3_EXPONENT_MIN mmxext
|
|
%endif
|
|
%ifdef HAVE_SSE
|
|
INIT_XMM
|
|
AC3_EXPONENT_MIN sse2
|
|
%endif
|
|
%undef PMINUB
|
|
%undef LOOP_ALIGN
|