mirror of https://git.ffmpeg.org/ffmpeg.git
181 lines
5.3 KiB
NASM
181 lines
5.3 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
|
|
|
|
;-----------------------------------------------------------------------------
|
|
; int ff_ac3_max_msb_abs_int16(const int16_t *src, int len)
|
|
;
|
|
; This function uses 2 different methods to calculate a valid result.
|
|
; 1) logical 'or' of abs of each element
|
|
; This is used for ssse3 because of the pabsw instruction.
|
|
; It is also used for mmx because of the lack of min/max instructions.
|
|
; 2) calculate min/max for the array, then or(abs(min),abs(max))
|
|
; This is used for mmxext and sse2 because they have pminsw/pmaxsw.
|
|
;-----------------------------------------------------------------------------
|
|
|
|
%macro AC3_MAX_MSB_ABS_INT16 2
|
|
cglobal ac3_max_msb_abs_int16_%1, 2,2,5, src, len
|
|
pxor m2, m2
|
|
pxor m3, m3
|
|
.loop:
|
|
%ifidn %2, min_max
|
|
mova m0, [srcq]
|
|
mova m1, [srcq+mmsize]
|
|
pminsw m2, m0
|
|
pminsw m2, m1
|
|
pmaxsw m3, m0
|
|
pmaxsw m3, m1
|
|
%else ; or_abs
|
|
%ifidn %1, mmx
|
|
mova m0, [srcq]
|
|
mova m1, [srcq+mmsize]
|
|
ABS2 m0, m1, m3, m4
|
|
%else ; ssse3
|
|
; using memory args is faster for ssse3
|
|
pabsw m0, [srcq]
|
|
pabsw m1, [srcq+mmsize]
|
|
%endif
|
|
por m2, m0
|
|
por m2, m1
|
|
%endif
|
|
add srcq, mmsize*2
|
|
sub lend, mmsize
|
|
ja .loop
|
|
%ifidn %2, min_max
|
|
ABS2 m2, m3, m0, m1
|
|
por m2, m3
|
|
%endif
|
|
%ifidn mmsize, 16
|
|
movhlps m0, m2
|
|
por m2, m0
|
|
%endif
|
|
PSHUFLW m0, m2, 0xe
|
|
por m2, m0
|
|
PSHUFLW m0, m2, 0x1
|
|
por m2, m0
|
|
movd eax, m2
|
|
and eax, 0xFFFF
|
|
RET
|
|
%endmacro
|
|
|
|
INIT_MMX
|
|
%define ABS2 ABS2_MMX
|
|
%define PSHUFLW pshufw
|
|
AC3_MAX_MSB_ABS_INT16 mmx, or_abs
|
|
%define ABS2 ABS2_MMX2
|
|
AC3_MAX_MSB_ABS_INT16 mmxext, min_max
|
|
INIT_XMM
|
|
%define PSHUFLW pshuflw
|
|
AC3_MAX_MSB_ABS_INT16 sse2, min_max
|
|
%define ABS2 ABS2_SSSE3
|
|
AC3_MAX_MSB_ABS_INT16 ssse3, or_abs
|
|
|
|
;-----------------------------------------------------------------------------
|
|
; macro used for ff_ac3_lshift_int16() and ff_ac3_rshift_int32()
|
|
;-----------------------------------------------------------------------------
|
|
|
|
%macro AC3_SHIFT 4 ; l/r, 16/32, shift instruction, instruction set
|
|
cglobal ac3_%1shift_int%2_%4, 3,3,5, src, len, shift
|
|
movd m0, shiftd
|
|
.loop:
|
|
mova m1, [srcq ]
|
|
mova m2, [srcq+mmsize ]
|
|
mova m3, [srcq+mmsize*2]
|
|
mova m4, [srcq+mmsize*3]
|
|
%3 m1, m0
|
|
%3 m2, m0
|
|
%3 m3, m0
|
|
%3 m4, m0
|
|
mova [srcq ], m1
|
|
mova [srcq+mmsize ], m2
|
|
mova [srcq+mmsize*2], m3
|
|
mova [srcq+mmsize*3], m4
|
|
add srcq, mmsize*4
|
|
sub lend, mmsize*32/%2
|
|
ja .loop
|
|
.end:
|
|
REP_RET
|
|
%endmacro
|
|
|
|
;-----------------------------------------------------------------------------
|
|
; void ff_ac3_lshift_int16(int16_t *src, unsigned int len, unsigned int shift)
|
|
;-----------------------------------------------------------------------------
|
|
|
|
INIT_MMX
|
|
AC3_SHIFT l, 16, psllw, mmx
|
|
INIT_XMM
|
|
AC3_SHIFT l, 16, psllw, sse2
|
|
|
|
;-----------------------------------------------------------------------------
|
|
; void ff_ac3_rshift_int32(int32_t *src, unsigned int len, unsigned int shift)
|
|
;-----------------------------------------------------------------------------
|
|
|
|
INIT_MMX
|
|
AC3_SHIFT r, 32, psrad, mmx
|
|
INIT_XMM
|
|
AC3_SHIFT r, 32, psrad, sse2
|