1 ;*****************************************************************************
2 ;* x86-optimized AC-3 DSP utils
3 ;* Copyright (c) 2011 Justin Ruggles
5 ;* This file is part of FFmpeg.
7 ;* FFmpeg is free software; you can redistribute it and/or
8 ;* modify it under the terms of the GNU Lesser General Public
9 ;* License as published by the Free Software Foundation; either
10 ;* version 2.1 of the License, or (at your option) any later version.
12 ;* FFmpeg is distributed in the hope that it will be useful,
13 ;* but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 ;* Lesser General Public License for more details.
17 ;* You should have received a copy of the GNU Lesser General Public
18 ;* License along with FFmpeg; if not, write to the Free Software
19 ;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 ;******************************************************************************
23 %include "x86util.asm"
27 ;-----------------------------------------------------------------------------
28 ; void ff_ac3_exponent_min(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
29 ;-----------------------------------------------------------------------------
31 %macro AC3_EXPONENT_MIN 1
32 cglobal ac3_exponent_min_%1, 3,4,2, exp, reuse_blks, expn, offset
37 mov offsetq, reuse_blksq
38 mova m0, [expq+offsetq]
42 PMINUB m0, [expq+offsetq], m1
53 %define PMINUB PMINUB_MMX
58 %define PMINUB PMINUB_MMXEXT
59 %define LOOP_ALIGN ALIGN 16
60 AC3_EXPONENT_MIN mmxext
69 ;-----------------------------------------------------------------------------
70 ; int ff_ac3_max_msb_abs_int16(const int16_t *src, int len)
72 ; This function uses 2 different methods to calculate a valid result.
73 ; 1) logical 'or' of abs of each element
74 ; This is used for ssse3 because of the pabsw instruction.
75 ; It is also used for mmx because of the lack of min/max instructions.
76 ; 2) calculate min/max for the array, then or(abs(min),abs(max))
77 ; This is used for mmxext and sse2 because they have pminsw/pmaxsw.
78 ;-----------------------------------------------------------------------------
80 %macro AC3_MAX_MSB_ABS_INT16 2
81 cglobal ac3_max_msb_abs_int16_%1, 2,2,5, src, len
87 mova m1, [srcq+mmsize]
95 mova m1, [srcq+mmsize]
98 ; using memory args is faster for ssse3
100 pabsw m1, [srcq+mmsize]
126 %define ABS2 ABS2_MMX
127 %define PSHUFLW pshufw
128 AC3_MAX_MSB_ABS_INT16 mmx, or_abs
129 %define ABS2 ABS2_MMX2
130 AC3_MAX_MSB_ABS_INT16 mmxext, min_max
132 %define PSHUFLW pshuflw
133 AC3_MAX_MSB_ABS_INT16 sse2, min_max
134 %define ABS2 ABS2_SSSE3
135 AC3_MAX_MSB_ABS_INT16 ssse3, or_abs
137 ;-----------------------------------------------------------------------------
138 ; macro used for ff_ac3_lshift_int16() and ff_ac3_rshift_int32()
139 ;-----------------------------------------------------------------------------
141 %macro AC3_SHIFT 4 ; l/r, 16/32, shift instruction, instruction set
142 cglobal ac3_%1shift_int%2_%4, 3,3,5, src, len, shift
146 mova m2, [srcq+mmsize ]
147 mova m3, [srcq+mmsize*2]
148 mova m4, [srcq+mmsize*3]
154 mova [srcq+mmsize ], m2
155 mova [srcq+mmsize*2], m3
156 mova [srcq+mmsize*3], m4
158 sub lend, mmsize*32/%2
164 ;-----------------------------------------------------------------------------
165 ; void ff_ac3_lshift_int16(int16_t *src, unsigned int len, unsigned int shift)
166 ;-----------------------------------------------------------------------------
169 AC3_SHIFT l, 16, psllw, mmx
171 AC3_SHIFT l, 16, psllw, sse2
173 ;-----------------------------------------------------------------------------
174 ; void ff_ac3_rshift_int32(int32_t *src, unsigned int len, unsigned int shift)
175 ;-----------------------------------------------------------------------------
178 AC3_SHIFT r, 32, psrad, mmx
180 AC3_SHIFT r, 32, psrad, sse2