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 ;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 ;******************************************************************************
22 %include "libavutil/x86/x86util.asm"
26 ; 16777216.0f - used in ff_float_to_fixed24()
27 pf_1_24: times 4 dd 0x4B800000
29 ; used in ff_ac3_compute_mantissa_size()
31 pw_bap_mul1: dw 21846, 21846, 0, 32768, 21846, 21846, 0, 32768
32 pw_bap_mul2: dw 5, 7, 0, 7, 5, 7, 0, 7
34 ; used in ff_ac3_extract_exponents()
36 pd_151: times 4 dd 151
40 ;-----------------------------------------------------------------------------
41 ; void ff_ac3_exponent_min(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
42 ;-----------------------------------------------------------------------------
44 %macro AC3_EXPONENT_MIN 0
45 cglobal ac3_exponent_min, 3, 4, 2, exp, reuse_blks, expn, offset
50 mov offsetq, reuse_blksq
51 mova m0, [expq+offsetq]
55 PMINUB m0, [expq+offsetq], m1
69 %if HAVE_MMXEXT_EXTERNAL
70 %define LOOP_ALIGN ALIGN 16
74 %if HAVE_SSE2_EXTERNAL
80 ;-----------------------------------------------------------------------------
81 ; int ff_ac3_max_msb_abs_int16(const int16_t *src, int len)
83 ; This function uses 2 different methods to calculate a valid result.
84 ; 1) logical 'or' of abs of each element
85 ; This is used for ssse3 because of the pabsw instruction.
86 ; It is also used for mmx because of the lack of min/max instructions.
87 ; 2) calculate min/max for the array, then or(abs(min),abs(max))
88 ; This is used for mmxext and sse2 because they have pminsw/pmaxsw.
89 ;-----------------------------------------------------------------------------
91 ; logical 'or' of 4 or 8 words in an mmx or xmm register into the low word
92 %macro OR_WORDS_HORIZ 2 ; src, tmp
100 %elif cpuflag(mmxext)
115 %macro AC3_MAX_MSB_ABS_INT16 1
116 cglobal ac3_max_msb_abs_int16, 2,2,5, src, len
122 mova m1, [srcq+mmsize]
128 %if notcpuflag(ssse3)
130 mova m1, [srcq+mmsize]
133 ; using memory args is faster for ssse3
135 pabsw m1, [srcq+mmsize]
147 OR_WORDS_HORIZ m2, m0
154 AC3_MAX_MSB_ABS_INT16 or_abs
156 AC3_MAX_MSB_ABS_INT16 min_max
158 AC3_MAX_MSB_ABS_INT16 min_max
160 AC3_MAX_MSB_ABS_INT16 or_abs
162 ;-----------------------------------------------------------------------------
163 ; macro used for ff_ac3_lshift_int16() and ff_ac3_rshift_int32()
164 ;-----------------------------------------------------------------------------
166 %macro AC3_SHIFT 3 ; l/r, 16/32, shift instruction, instruction set
167 cglobal ac3_%1shift_int%2, 3, 3, 5, src, len, shift
171 mova m2, [srcq+mmsize ]
172 mova m3, [srcq+mmsize*2]
173 mova m4, [srcq+mmsize*3]
179 mova [srcq+mmsize ], m2
180 mova [srcq+mmsize*2], m3
181 mova [srcq+mmsize*3], m4
183 sub lend, mmsize*32/%2
189 ;-----------------------------------------------------------------------------
190 ; void ff_ac3_lshift_int16(int16_t *src, unsigned int len, unsigned int shift)
191 ;-----------------------------------------------------------------------------
194 AC3_SHIFT l, 16, psllw
196 AC3_SHIFT l, 16, psllw
198 ;-----------------------------------------------------------------------------
199 ; void ff_ac3_rshift_int32(int32_t *src, unsigned int len, unsigned int shift)
200 ;-----------------------------------------------------------------------------
203 AC3_SHIFT r, 32, psrad
205 AC3_SHIFT r, 32, psrad
207 ;-----------------------------------------------------------------------------
208 ; void ff_float_to_fixed24(int32_t *dst, const float *src, unsigned int len)
209 ;-----------------------------------------------------------------------------
211 ; The 3DNow! version is not bit-identical because pf2id uses truncation rather
212 ; than round-to-nearest.
214 cglobal float_to_fixed24, 3, 3, 0, dst, src, len
241 cglobal float_to_fixed24, 3, 3, 3, dst, src, len
266 cglobal float_to_fixed24, 3, 3, 9, dst, src, len
270 movaps m2, [srcq+16 ]
271 movaps m3, [srcq+32 ]
272 movaps m4, [srcq+48 ]
274 movaps m5, [srcq+64 ]
275 movaps m6, [srcq+80 ]
276 movaps m7, [srcq+96 ]
277 movaps m8, [srcq+112]
300 movdqa [dstq+16 ], m2
301 movdqa [dstq+32 ], m3
302 movdqa [dstq+48 ], m4
304 movdqa [dstq+64 ], m5
305 movdqa [dstq+80 ], m6
306 movdqa [dstq+96 ], m7
307 movdqa [dstq+112], m8
319 ;------------------------------------------------------------------------------
320 ; int ff_ac3_compute_mantissa_size(uint16_t mant_cnt[6][16])
321 ;------------------------------------------------------------------------------
323 %macro PHADDD4 2 ; xmm src, xmm tmp
331 cglobal ac3_compute_mantissa_size, 1, 2, 4, mant_cnt, sum
332 movdqa m0, [mant_cntq ]
333 movdqa m1, [mant_cntq+ 1*16]
334 paddw m0, [mant_cntq+ 2*16]
335 paddw m1, [mant_cntq+ 3*16]
336 paddw m0, [mant_cntq+ 4*16]
337 paddw m1, [mant_cntq+ 5*16]
338 paddw m0, [mant_cntq+ 6*16]
339 paddw m1, [mant_cntq+ 7*16]
340 paddw m0, [mant_cntq+ 8*16]
341 paddw m1, [mant_cntq+ 9*16]
342 paddw m0, [mant_cntq+10*16]
343 paddw m1, [mant_cntq+11*16]
344 pmaddwd m0, [ac3_bap_bits ]
345 pmaddwd m1, [ac3_bap_bits+16]
349 movdqa m3, [pw_bap_mul1]
350 movhpd m0, [mant_cntq +2]
351 movlpd m0, [mant_cntq+1*32+2]
352 movhpd m1, [mant_cntq+2*32+2]
353 movlpd m1, [mant_cntq+3*32+2]
354 movhpd m2, [mant_cntq+4*32+2]
355 movlpd m2, [mant_cntq+5*32+2]
361 pmaddwd m0, [pw_bap_mul2]
367 ;------------------------------------------------------------------------------
368 ; void ff_ac3_extract_exponents(uint8_t *exp, int32_t *coef, int nb_coefs)
369 ;------------------------------------------------------------------------------
371 %macro PABSD 1-2 ; src/dst, unused
382 %macro AC3_EXTRACT_EXPONENTS 0
383 cglobal ac3_extract_exponents, 3, 3, 4, exp, coef, len
385 lea coefq, [coefq+4*lenq]
390 ; move 4 32-bit coefs to xmm0
391 mova m0, [coefq+4*lenq]
394 ; convert to float and extract exponents
401 ; move the lowest byte in each of 4 dwords to the low dword
402 ; NOTE: We cannot just extract the low bytes with pshufb because the dword
403 ; result for 16777215 is -1 due to float inaccuracy. Using packuswb
404 ; clips this to 0, which is the correct exponent.
414 %if HAVE_SSE2_EXTERNAL
416 AC3_EXTRACT_EXPONENTS
418 %if HAVE_SSSE3_EXTERNAL
420 AC3_EXTRACT_EXPONENTS