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553 lines
15 KiB
NASM
553 lines
15 KiB
NASM
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;*****************************************************************************
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;* x86-optimized AC-3 DSP functions
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;* Copyright (c) 2011 Justin Ruggles
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;*
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;* This file is part of FFmpeg.
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;*
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;* FFmpeg is free software; you can redistribute it and/or
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;* modify it under the terms of the GNU Lesser General Public
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;* License as published by the Free Software Foundation; either
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;* version 2.1 of the License, or (at your option) any later version.
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;*
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;* FFmpeg is distributed in the hope that it will be useful,
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;* but WITHOUT ANY WARRANTY; without even the implied warranty of
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;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;* Lesser General Public License for more details.
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;*
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;* You should have received a copy of the GNU Lesser General Public
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;* License along with FFmpeg; if not, write to the Free Software
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;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;******************************************************************************
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%include "libavutil/x86/x86util.asm"
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SECTION_RODATA
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; 16777216.0f - used in ff_float_to_fixed24()
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pf_1_24: times 4 dd 0x4B800000
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; used in ff_ac3_compute_mantissa_size()
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cextern ac3_bap_bits
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pw_bap_mul1: dw 21846, 21846, 0, 32768, 21846, 21846, 0, 32768
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pw_bap_mul2: dw 5, 7, 0, 7, 5, 7, 0, 7
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; used in ff_ac3_extract_exponents()
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cextern pd_1
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pd_151: times 4 dd 151
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; used in ff_apply_window_int16()
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pb_revwords: SHUFFLE_MASK_W 7, 6, 5, 4, 3, 2, 1, 0
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pd_16384: times 4 dd 16384
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SECTION .text
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;-----------------------------------------------------------------------------
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; void ff_ac3_exponent_min(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
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;-----------------------------------------------------------------------------
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%macro AC3_EXPONENT_MIN 0
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cglobal ac3_exponent_min, 3, 4, 2, exp, reuse_blks, expn, offset
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shl reuse_blksq, 8
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jz .end
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LOOP_ALIGN
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.nextexp:
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mov offsetq, reuse_blksq
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mova m0, [expq+offsetq]
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sub offsetq, 256
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LOOP_ALIGN
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.nextblk:
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PMINUB m0, [expq+offsetq], m1
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sub offsetq, 256
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jae .nextblk
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mova [expq], m0
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add expq, mmsize
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sub expnq, mmsize
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jg .nextexp
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.end:
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REP_RET
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%endmacro
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%define LOOP_ALIGN
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INIT_MMX mmx
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AC3_EXPONENT_MIN
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%if HAVE_MMXEXT_EXTERNAL
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%define LOOP_ALIGN ALIGN 16
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INIT_MMX mmxext
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AC3_EXPONENT_MIN
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%endif
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%if HAVE_SSE2_EXTERNAL
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INIT_XMM sse2
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AC3_EXPONENT_MIN
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%endif
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%undef LOOP_ALIGN
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;-----------------------------------------------------------------------------
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; int ff_ac3_max_msb_abs_int16(const int16_t *src, int len)
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;
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; This function uses 2 different methods to calculate a valid result.
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; 1) logical 'or' of abs of each element
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; This is used for ssse3 because of the pabsw instruction.
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; It is also used for mmx because of the lack of min/max instructions.
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; 2) calculate min/max for the array, then or(abs(min),abs(max))
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; This is used for mmxext and sse2 because they have pminsw/pmaxsw.
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;-----------------------------------------------------------------------------
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; logical 'or' of 4 or 8 words in an mmx or xmm register into the low word
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%macro OR_WORDS_HORIZ 2 ; src, tmp
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%if cpuflag(sse2)
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movhlps %2, %1
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por %1, %2
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pshuflw %2, %1, q0032
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por %1, %2
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pshuflw %2, %1, q0001
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por %1, %2
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%elif cpuflag(mmxext)
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pshufw %2, %1, q0032
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por %1, %2
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pshufw %2, %1, q0001
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por %1, %2
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%else ; mmx
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movq %2, %1
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psrlq %2, 32
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por %1, %2
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movq %2, %1
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psrlq %2, 16
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por %1, %2
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%endif
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%endmacro
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%macro AC3_MAX_MSB_ABS_INT16 1
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cglobal ac3_max_msb_abs_int16, 2,2,5, src, len
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pxor m2, m2
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pxor m3, m3
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.loop:
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%ifidn %1, min_max
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mova m0, [srcq]
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mova m1, [srcq+mmsize]
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pminsw m2, m0
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pminsw m2, m1
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pmaxsw m3, m0
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pmaxsw m3, m1
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%else ; or_abs
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%if notcpuflag(ssse3)
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mova m0, [srcq]
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mova m1, [srcq+mmsize]
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ABS2 m0, m1, m3, m4
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%else ; ssse3
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; using memory args is faster for ssse3
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pabsw m0, [srcq]
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pabsw m1, [srcq+mmsize]
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%endif
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por m2, m0
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por m2, m1
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%endif
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add srcq, mmsize*2
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sub lend, mmsize
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ja .loop
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%ifidn %1, min_max
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ABS2 m2, m3, m0, m1
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por m2, m3
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%endif
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OR_WORDS_HORIZ m2, m0
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movd eax, m2
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and eax, 0xFFFF
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RET
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%endmacro
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INIT_MMX mmx
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AC3_MAX_MSB_ABS_INT16 or_abs
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INIT_MMX mmxext
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AC3_MAX_MSB_ABS_INT16 min_max
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INIT_XMM sse2
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AC3_MAX_MSB_ABS_INT16 min_max
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INIT_XMM ssse3
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AC3_MAX_MSB_ABS_INT16 or_abs
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;-----------------------------------------------------------------------------
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; macro used for ff_ac3_lshift_int16() and ff_ac3_rshift_int32()
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;-----------------------------------------------------------------------------
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%macro AC3_SHIFT 3 ; l/r, 16/32, shift instruction, instruction set
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cglobal ac3_%1shift_int%2, 3, 3, 5, src, len, shift
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movd m0, shiftd
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.loop:
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mova m1, [srcq ]
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mova m2, [srcq+mmsize ]
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mova m3, [srcq+mmsize*2]
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mova m4, [srcq+mmsize*3]
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%3 m1, m0
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%3 m2, m0
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%3 m3, m0
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%3 m4, m0
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mova [srcq ], m1
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mova [srcq+mmsize ], m2
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mova [srcq+mmsize*2], m3
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mova [srcq+mmsize*3], m4
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add srcq, mmsize*4
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sub lend, mmsize*32/%2
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ja .loop
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.end:
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REP_RET
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%endmacro
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;-----------------------------------------------------------------------------
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; void ff_ac3_lshift_int16(int16_t *src, unsigned int len, unsigned int shift)
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;-----------------------------------------------------------------------------
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INIT_MMX mmx
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AC3_SHIFT l, 16, psllw
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INIT_XMM sse2
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AC3_SHIFT l, 16, psllw
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;-----------------------------------------------------------------------------
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; void ff_ac3_rshift_int32(int32_t *src, unsigned int len, unsigned int shift)
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;-----------------------------------------------------------------------------
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INIT_MMX mmx
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AC3_SHIFT r, 32, psrad
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INIT_XMM sse2
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AC3_SHIFT r, 32, psrad
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;-----------------------------------------------------------------------------
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; void ff_float_to_fixed24(int32_t *dst, const float *src, unsigned int len)
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;-----------------------------------------------------------------------------
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; The 3DNow! version is not bit-identical because pf2id uses truncation rather
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; than round-to-nearest.
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INIT_MMX 3dnow
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cglobal float_to_fixed24, 3, 3, 0, dst, src, len
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movq m0, [pf_1_24]
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.loop:
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movq m1, [srcq ]
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movq m2, [srcq+8 ]
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movq m3, [srcq+16]
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movq m4, [srcq+24]
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pfmul m1, m0
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pfmul m2, m0
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pfmul m3, m0
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pfmul m4, m0
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pf2id m1, m1
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pf2id m2, m2
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pf2id m3, m3
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pf2id m4, m4
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movq [dstq ], m1
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movq [dstq+8 ], m2
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movq [dstq+16], m3
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movq [dstq+24], m4
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add srcq, 32
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add dstq, 32
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sub lend, 8
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ja .loop
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femms
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RET
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INIT_XMM sse
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cglobal float_to_fixed24, 3, 3, 3, dst, src, len
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movaps m0, [pf_1_24]
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.loop:
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movaps m1, [srcq ]
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movaps m2, [srcq+16]
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mulps m1, m0
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mulps m2, m0
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cvtps2pi mm0, m1
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movhlps m1, m1
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cvtps2pi mm1, m1
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cvtps2pi mm2, m2
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movhlps m2, m2
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cvtps2pi mm3, m2
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movq [dstq ], mm0
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movq [dstq+ 8], mm1
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movq [dstq+16], mm2
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movq [dstq+24], mm3
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add srcq, 32
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add dstq, 32
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sub lend, 8
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ja .loop
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emms
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RET
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INIT_XMM sse2
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cglobal float_to_fixed24, 3, 3, 9, dst, src, len
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movaps m0, [pf_1_24]
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.loop:
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movaps m1, [srcq ]
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movaps m2, [srcq+16 ]
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movaps m3, [srcq+32 ]
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movaps m4, [srcq+48 ]
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%ifdef m8
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movaps m5, [srcq+64 ]
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movaps m6, [srcq+80 ]
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movaps m7, [srcq+96 ]
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movaps m8, [srcq+112]
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%endif
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mulps m1, m0
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mulps m2, m0
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mulps m3, m0
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mulps m4, m0
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%ifdef m8
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mulps m5, m0
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mulps m6, m0
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mulps m7, m0
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mulps m8, m0
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%endif
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cvtps2dq m1, m1
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cvtps2dq m2, m2
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cvtps2dq m3, m3
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cvtps2dq m4, m4
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%ifdef m8
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cvtps2dq m5, m5
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cvtps2dq m6, m6
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cvtps2dq m7, m7
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cvtps2dq m8, m8
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%endif
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movdqa [dstq ], m1
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movdqa [dstq+16 ], m2
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movdqa [dstq+32 ], m3
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movdqa [dstq+48 ], m4
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%ifdef m8
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movdqa [dstq+64 ], m5
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movdqa [dstq+80 ], m6
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movdqa [dstq+96 ], m7
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movdqa [dstq+112], m8
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add srcq, 128
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add dstq, 128
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sub lenq, 32
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%else
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add srcq, 64
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add dstq, 64
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sub lenq, 16
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%endif
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ja .loop
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REP_RET
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;------------------------------------------------------------------------------
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; int ff_ac3_compute_mantissa_size(uint16_t mant_cnt[6][16])
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;------------------------------------------------------------------------------
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%macro PHADDD4 2 ; xmm src, xmm tmp
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movhlps %2, %1
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paddd %1, %2
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pshufd %2, %1, 0x1
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paddd %1, %2
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%endmacro
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INIT_XMM sse2
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cglobal ac3_compute_mantissa_size, 1, 2, 4, mant_cnt, sum
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movdqa m0, [mant_cntq ]
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movdqa m1, [mant_cntq+ 1*16]
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paddw m0, [mant_cntq+ 2*16]
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paddw m1, [mant_cntq+ 3*16]
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paddw m0, [mant_cntq+ 4*16]
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paddw m1, [mant_cntq+ 5*16]
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paddw m0, [mant_cntq+ 6*16]
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paddw m1, [mant_cntq+ 7*16]
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paddw m0, [mant_cntq+ 8*16]
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paddw m1, [mant_cntq+ 9*16]
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paddw m0, [mant_cntq+10*16]
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paddw m1, [mant_cntq+11*16]
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pmaddwd m0, [ac3_bap_bits ]
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pmaddwd m1, [ac3_bap_bits+16]
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paddd m0, m1
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PHADDD4 m0, m1
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movd sumd, m0
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movdqa m3, [pw_bap_mul1]
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movhpd m0, [mant_cntq +2]
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movlpd m0, [mant_cntq+1*32+2]
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movhpd m1, [mant_cntq+2*32+2]
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movlpd m1, [mant_cntq+3*32+2]
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movhpd m2, [mant_cntq+4*32+2]
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movlpd m2, [mant_cntq+5*32+2]
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pmulhuw m0, m3
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pmulhuw m1, m3
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pmulhuw m2, m3
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paddusw m0, m1
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paddusw m0, m2
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pmaddwd m0, [pw_bap_mul2]
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PHADDD4 m0, m1
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movd eax, m0
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add eax, sumd
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RET
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;------------------------------------------------------------------------------
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; void ff_ac3_extract_exponents(uint8_t *exp, int32_t *coef, int nb_coefs)
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;------------------------------------------------------------------------------
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%macro PABSD 1-2 ; src/dst, unused
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%if cpuflag(ssse3)
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pabsd %1, %1
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%else ; src/dst, tmp
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pxor %2, %2
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pcmpgtd %2, %1
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pxor %1, %2
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psubd %1, %2
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%endif
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%endmacro
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%macro AC3_EXTRACT_EXPONENTS 0
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cglobal ac3_extract_exponents, 3, 3, 4, exp, coef, len
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add expq, lenq
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lea coefq, [coefq+4*lenq]
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neg lenq
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mova m2, [pd_1]
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mova m3, [pd_151]
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.loop:
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; move 4 32-bit coefs to xmm0
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mova m0, [coefq+4*lenq]
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; absolute value
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PABSD m0, m1
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; convert to float and extract exponents
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pslld m0, 1
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por m0, m2
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cvtdq2ps m1, m0
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psrld m1, 23
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mova m0, m3
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psubd m0, m1
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; move the lowest byte in each of 4 dwords to the low dword
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; NOTE: We cannot just extract the low bytes with pshufb because the dword
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; result for 16777215 is -1 due to float inaccuracy. Using packuswb
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; clips this to 0, which is the correct exponent.
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packssdw m0, m0
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packuswb m0, m0
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movd [expq+lenq], m0
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add lenq, 4
|
||
|
jl .loop
|
||
|
REP_RET
|
||
|
%endmacro
|
||
|
|
||
|
%if HAVE_SSE2_EXTERNAL
|
||
|
INIT_XMM sse2
|
||
|
AC3_EXTRACT_EXPONENTS
|
||
|
%endif
|
||
|
%if HAVE_SSSE3_EXTERNAL
|
||
|
INIT_XMM ssse3
|
||
|
AC3_EXTRACT_EXPONENTS
|
||
|
%endif
|
||
|
|
||
|
;-----------------------------------------------------------------------------
|
||
|
; void ff_apply_window_int16(int16_t *output, const int16_t *input,
|
||
|
; const int16_t *window, unsigned int len)
|
||
|
;-----------------------------------------------------------------------------
|
||
|
|
||
|
%macro REVERSE_WORDS 1-2
|
||
|
%if cpuflag(ssse3) && notcpuflag(atom)
|
||
|
pshufb %1, %2
|
||
|
%elif cpuflag(sse2)
|
||
|
pshuflw %1, %1, 0x1B
|
||
|
pshufhw %1, %1, 0x1B
|
||
|
pshufd %1, %1, 0x4E
|
||
|
%elif cpuflag(mmxext)
|
||
|
pshufw %1, %1, 0x1B
|
||
|
%endif
|
||
|
%endmacro
|
||
|
|
||
|
%macro MUL16FIXED 3
|
||
|
%if cpuflag(ssse3) ; dst, src, unused
|
||
|
; dst = ((dst * src) + (1<<14)) >> 15
|
||
|
pmulhrsw %1, %2
|
||
|
%elif cpuflag(mmxext) ; dst, src, temp
|
||
|
; dst = (dst * src) >> 15
|
||
|
; pmulhw cuts off the bottom bit, so we have to lshift by 1 and add it back
|
||
|
; in from the pmullw result.
|
||
|
mova %3, %1
|
||
|
pmulhw %1, %2
|
||
|
pmullw %3, %2
|
||
|
psrlw %3, 15
|
||
|
psllw %1, 1
|
||
|
por %1, %3
|
||
|
%endif
|
||
|
%endmacro
|
||
|
|
||
|
%macro APPLY_WINDOW_INT16 1 ; %1 bitexact version
|
||
|
%if %1
|
||
|
cglobal apply_window_int16, 4,5,6, output, input, window, offset, offset2
|
||
|
%else
|
||
|
cglobal apply_window_int16_round, 4,5,6, output, input, window, offset, offset2
|
||
|
%endif
|
||
|
lea offset2q, [offsetq-mmsize]
|
||
|
%if cpuflag(ssse3) && notcpuflag(atom)
|
||
|
mova m5, [pb_revwords]
|
||
|
ALIGN 16
|
||
|
%elif %1
|
||
|
mova m5, [pd_16384]
|
||
|
%endif
|
||
|
.loop:
|
||
|
%if cpuflag(ssse3)
|
||
|
; This version does the 16x16->16 multiplication in-place without expanding
|
||
|
; to 32-bit. The ssse3 version is bit-identical.
|
||
|
mova m0, [windowq+offset2q]
|
||
|
mova m1, [ inputq+offset2q]
|
||
|
pmulhrsw m1, m0
|
||
|
REVERSE_WORDS m0, m5
|
||
|
pmulhrsw m0, [ inputq+offsetq ]
|
||
|
mova [outputq+offset2q], m1
|
||
|
mova [outputq+offsetq ], m0
|
||
|
%elif %1
|
||
|
; This version expands 16-bit to 32-bit, multiplies by the window,
|
||
|
; adds 16384 for rounding, right shifts 15, then repacks back to words to
|
||
|
; save to the output. The window is reversed for the second half.
|
||
|
mova m3, [windowq+offset2q]
|
||
|
mova m4, [ inputq+offset2q]
|
||
|
pxor m0, m0
|
||
|
punpcklwd m0, m3
|
||
|
punpcklwd m1, m4
|
||
|
pmaddwd m0, m1
|
||
|
paddd m0, m5
|
||
|
psrad m0, 15
|
||
|
pxor m2, m2
|
||
|
punpckhwd m2, m3
|
||
|
punpckhwd m1, m4
|
||
|
pmaddwd m2, m1
|
||
|
paddd m2, m5
|
||
|
psrad m2, 15
|
||
|
packssdw m0, m2
|
||
|
mova [outputq+offset2q], m0
|
||
|
REVERSE_WORDS m3
|
||
|
mova m4, [ inputq+offsetq]
|
||
|
pxor m0, m0
|
||
|
punpcklwd m0, m3
|
||
|
punpcklwd m1, m4
|
||
|
pmaddwd m0, m1
|
||
|
paddd m0, m5
|
||
|
psrad m0, 15
|
||
|
pxor m2, m2
|
||
|
punpckhwd m2, m3
|
||
|
punpckhwd m1, m4
|
||
|
pmaddwd m2, m1
|
||
|
paddd m2, m5
|
||
|
psrad m2, 15
|
||
|
packssdw m0, m2
|
||
|
mova [outputq+offsetq], m0
|
||
|
%else
|
||
|
; This version does the 16x16->16 multiplication in-place without expanding
|
||
|
; to 32-bit. The mmxext and sse2 versions do not use rounding, and
|
||
|
; therefore are not bit-identical to the C version.
|
||
|
mova m0, [windowq+offset2q]
|
||
|
mova m1, [ inputq+offset2q]
|
||
|
mova m2, [ inputq+offsetq ]
|
||
|
MUL16FIXED m1, m0, m3
|
||
|
REVERSE_WORDS m0
|
||
|
MUL16FIXED m2, m0, m3
|
||
|
mova [outputq+offset2q], m1
|
||
|
mova [outputq+offsetq ], m2
|
||
|
%endif
|
||
|
add offsetd, mmsize
|
||
|
sub offset2d, mmsize
|
||
|
jae .loop
|
||
|
REP_RET
|
||
|
%endmacro
|
||
|
|
||
|
INIT_MMX mmxext
|
||
|
APPLY_WINDOW_INT16 0
|
||
|
INIT_XMM sse2
|
||
|
APPLY_WINDOW_INT16 0
|
||
|
|
||
|
INIT_MMX mmxext
|
||
|
APPLY_WINDOW_INT16 1
|
||
|
INIT_XMM sse2
|
||
|
APPLY_WINDOW_INT16 1
|
||
|
INIT_XMM ssse3
|
||
|
APPLY_WINDOW_INT16 1
|
||
|
INIT_XMM ssse3, atom
|
||
|
APPLY_WINDOW_INT16 1
|