mirror of
https://github.com/FFmpeg/FFmpeg.git
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3b5946bcce
Profiling results for overall decode and the output_data function in
particular are as follows:
Before After
Mean StdDev Mean StdDev Confidence Change
6:2 total 339.6 15.1 329.3 16.0 95.8% +3.1% (insignificant)
6:2 function 24.6 6.0 9.9 3.1 100.0% +148.5%
8:2 total 324.5 15.5 323.6 14.3 15.2% +0.3% (insignificant)
8:2 function 20.4 3.9 9.9 3.4 100.0% +104.7%
6:6 total 572.8 20.6 539.9 24.2 100.0% +6.1%
6:6 function 54.5 5.6 16.0 3.8 100.0% +240.9%
8:8 total 741.5 21.2 702.5 18.5 100.0% +5.6%
8:8 function 63.9 7.6 18.4 4.8 100.0% +247.3%
The assembly version has also been tested with a fuzz tester to ensure that
any combinations of inputs not exercised by my available test streams still
generate mathematically identical results to the C version.
Signed-off-by: Martin Storsjö <martin@martin.st>
534 lines
15 KiB
ArmAsm
534 lines
15 KiB
ArmAsm
/*
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* Copyright (c) 2014 RISC OS Open Ltd
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* Author: Ben Avison <bavison@riscosopen.org>
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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/arm/asm.S"
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.macro loadregoffsh2 group, index, base, offgroup, offindex
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.altmacro
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loadregoffsh2_ \group, %(\index), \base, \offgroup, %(\offindex)
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.noaltmacro
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.endm
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.macro loadregoffsh2_ group, index, base, offgroup, offindex
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ldr \group\index, [\base, \offgroup\offindex, lsl #2]
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.endm
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.macro eorlslreg check, data, group, index
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.altmacro
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eorlslreg_ \check, \data, \group, %(\index)
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.noaltmacro
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.endm
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.macro eorlslreg_ check, data, group, index
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eor \check, \check, \data, lsl \group\index
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.endm
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.macro decr_modulo var, by, modulus
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.set \var, \var - \by
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.if \var == 0
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.set \var, \modulus
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.endif
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.endm
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.macro load_group1 size, channels, r0, r1, r2, r3, pointer_dead=0
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.if \size == 2
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ldrd \r0, \r1, [IN], #(\size + 8 - \channels) * 4
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.else // size == 4
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.if IDX1 > 4 || \channels==8
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ldm IN!, {\r0, \r1, \r2, \r3}
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.else
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ldm IN, {\r0, \r1, \r2, \r3}
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.if !\pointer_dead
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add IN, IN, #(4 + 8 - \channels) * 4
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.endif
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.endif
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.endif
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decr_modulo IDX1, \size, \channels
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.endm
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.macro load_group2 size, channels, r0, r1, r2, r3, pointer_dead=0
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.if \size == 2
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.if IDX1 > 2
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ldm IN!, {\r2, \r3}
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.else
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//A .ifc \r2, ip
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//A .if \pointer_dead
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//A ldm IN, {\r2, \r3}
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//A .else
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//A ldr \r2, [IN], #4
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//A ldr \r3, [IN], #(\size - 1 + 8 - \channels) * 4
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//A .endif
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//A .else
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ldrd \r2, \r3, [IN], #(\size + 8 - \channels) * 4
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//A .endif
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.endif
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.endif
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decr_modulo IDX1, \size, \channels
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.endm
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.macro implement_pack inorder, channels, shift
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.if \inorder
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.ifc \shift, mixed
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CHECK .req a1
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COUNT .req a2
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IN .req a3
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OUT .req a4
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DAT0 .req v1
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DAT1 .req v2
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DAT2 .req v3
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DAT3 .req v4
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SHIFT0 .req v5
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SHIFT1 .req v6
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SHIFT2 .req sl
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SHIFT3 .req fp
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SHIFT4 .req ip
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SHIFT5 .req lr
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.macro output4words
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.set SIZE_GROUP1, IDX1
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.if SIZE_GROUP1 > 4
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.set SIZE_GROUP1, 4
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.endif
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.set SIZE_GROUP2, 4 - SIZE_GROUP1
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load_group1 SIZE_GROUP1, \channels, DAT0, DAT1, DAT2, DAT3
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load_group2 SIZE_GROUP2, \channels, DAT0, DAT1, DAT2, DAT3
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.if \channels == 2
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lsl DAT0, SHIFT0
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lsl DAT1, SHIFT1
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lsl DAT2, SHIFT0
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lsl DAT3, SHIFT1
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.elseif \channels == 6
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.if IDX2 == 6
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lsl DAT0, SHIFT0
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lsl DAT1, SHIFT1
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lsl DAT2, SHIFT2
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lsl DAT3, SHIFT3
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.elseif IDX2 == 2
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lsl DAT0, SHIFT4
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lsl DAT1, SHIFT5
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lsl DAT2, SHIFT0
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lsl DAT3, SHIFT1
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.else // IDX2 == 4
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lsl DAT0, SHIFT2
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lsl DAT1, SHIFT3
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lsl DAT2, SHIFT4
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lsl DAT3, SHIFT5
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.endif
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.elseif \channels == 8
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.if IDX2 == 8
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uxtb SHIFT0, SHIFT4, ror #0
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uxtb SHIFT1, SHIFT4, ror #8
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uxtb SHIFT2, SHIFT4, ror #16
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uxtb SHIFT3, SHIFT4, ror #24
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.else
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uxtb SHIFT0, SHIFT5, ror #0
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uxtb SHIFT1, SHIFT5, ror #8
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uxtb SHIFT2, SHIFT5, ror #16
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uxtb SHIFT3, SHIFT5, ror #24
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.endif
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lsl DAT0, SHIFT0
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lsl DAT1, SHIFT1
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lsl DAT2, SHIFT2
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lsl DAT3, SHIFT3
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.endif
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eor CHECK, CHECK, DAT0, lsr #8 - (\channels - IDX2)
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eor CHECK, CHECK, DAT1, lsr #7 - (\channels - IDX2)
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decr_modulo IDX2, 2, \channels
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eor CHECK, CHECK, DAT2, lsr #8 - (\channels - IDX2)
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eor CHECK, CHECK, DAT3, lsr #7 - (\channels - IDX2)
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decr_modulo IDX2, 2, \channels
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stm OUT!, {DAT0 - DAT3}
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.endm
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.set WORDS_PER_LOOP, \channels // calculate LCM (channels, 4)
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.if (WORDS_PER_LOOP % 2) == 0
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.set WORDS_PER_LOOP, WORDS_PER_LOOP / 2
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.endif
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.if (WORDS_PER_LOOP % 2) == 0
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.set WORDS_PER_LOOP, WORDS_PER_LOOP / 2
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.endif
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.set WORDS_PER_LOOP, WORDS_PER_LOOP * 4
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.set SAMPLES_PER_LOOP, WORDS_PER_LOOP / \channels
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function ff_mlp_pack_output_inorder_\channels\()ch_mixedshift_armv6, export=1
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.if SAMPLES_PER_LOOP > 1
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tst COUNT, #SAMPLES_PER_LOOP - 1 // always seems to be in practice
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it ne
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bne X(ff_mlp_pack_output) // but just in case, branch to C implementation if not
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.endif
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teq COUNT, #0
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it eq
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bxeq lr
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push {v1-v6,sl,fp,lr}
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ldr SHIFT0, [sp, #(9+1)*4] // get output_shift from stack
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ldr SHIFT1, =0x08080808
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ldr SHIFT4, [SHIFT0]
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.if \channels == 2
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uadd8 SHIFT4, SHIFT4, SHIFT1 // increase all shifts by 8
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uxtb SHIFT0, SHIFT4, ror #0
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uxtb SHIFT1, SHIFT4, ror #8
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.else
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ldr SHIFT5, [SHIFT0, #4]
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uadd8 SHIFT4, SHIFT4, SHIFT1 // increase all shifts by 8
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uadd8 SHIFT5, SHIFT5, SHIFT1
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.if \channels == 6
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uxtb SHIFT0, SHIFT4, ror #0
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uxtb SHIFT1, SHIFT4, ror #8
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uxtb SHIFT2, SHIFT4, ror #16
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uxtb SHIFT3, SHIFT4, ror #24
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uxtb SHIFT4, SHIFT5, ror #0
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uxtb SHIFT5, SHIFT5, ror #8
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.endif
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.endif
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.set IDX1, \channels
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.set IDX2, \channels
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0:
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.rept WORDS_PER_LOOP / 4
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output4words
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.endr
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subs COUNT, COUNT, #SAMPLES_PER_LOOP
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bne 0b
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pop {v1-v6,sl,fp,pc}
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.ltorg
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endfunc
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.purgem output4words
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.unreq CHECK
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.unreq COUNT
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.unreq IN
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.unreq OUT
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.unreq DAT0
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.unreq DAT1
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.unreq DAT2
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.unreq DAT3
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.unreq SHIFT0
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.unreq SHIFT1
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.unreq SHIFT2
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.unreq SHIFT3
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.unreq SHIFT4
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.unreq SHIFT5
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.else // not mixed
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CHECK .req a1
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COUNT .req a2
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IN .req a3
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OUT .req a4
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DAT0 .req v1
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DAT1 .req v2
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DAT2 .req v3
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DAT3 .req v4
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DAT4 .req v5
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DAT5 .req v6
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DAT6 .req sl // use these rather than the otherwise unused
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DAT7 .req fp // ip and lr so that we can load them usinf LDRD
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.macro output4words tail, head, r0, r1, r2, r3, r4, r5, r6, r7, pointer_dead=0
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.if \head
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.set SIZE_GROUP1, IDX1
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.if SIZE_GROUP1 > 4
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.set SIZE_GROUP1, 4
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.endif
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.set SIZE_GROUP2, 4 - SIZE_GROUP1
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load_group1 SIZE_GROUP1, \channels, \r0, \r1, \r2, \r3, \pointer_dead
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.endif
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.if \tail
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eor CHECK, CHECK, \r4, lsr #8 - (\channels - IDX2)
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eor CHECK, CHECK, \r5, lsr #7 - (\channels - IDX2)
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decr_modulo IDX2, 2, \channels
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.endif
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.if \head
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load_group2 SIZE_GROUP2, \channels, \r0, \r1, \r2, \r3, \pointer_dead
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.endif
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.if \tail
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eor CHECK, CHECK, \r6, lsr #8 - (\channels - IDX2)
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eor CHECK, CHECK, \r7, lsr #7 - (\channels - IDX2)
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decr_modulo IDX2, 2, \channels
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stm OUT!, {\r4, \r5, \r6, \r7}
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.endif
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.if \head
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lsl \r0, #8 + \shift
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lsl \r1, #8 + \shift
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lsl \r2, #8 + \shift
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lsl \r3, #8 + \shift
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.endif
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.endm
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.set WORDS_PER_LOOP, \channels // calculate LCM (channels, 8)
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.if (WORDS_PER_LOOP % 2) == 0
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.set WORDS_PER_LOOP, WORDS_PER_LOOP / 2
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.endif
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.if (WORDS_PER_LOOP % 2) == 0
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.set WORDS_PER_LOOP, WORDS_PER_LOOP / 2
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.endif
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.if (WORDS_PER_LOOP % 2) == 0
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.set WORDS_PER_LOOP, WORDS_PER_LOOP / 2
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.endif
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.set WORDS_PER_LOOP, WORDS_PER_LOOP * 8
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.set SAMPLES_PER_LOOP, WORDS_PER_LOOP / \channels
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function ff_mlp_pack_output_inorder_\channels\()ch_\shift\()shift_armv6, export=1
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.if SAMPLES_PER_LOOP > 1
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tst COUNT, #SAMPLES_PER_LOOP - 1 // always seems to be in practice
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it ne
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bne X(ff_mlp_pack_output) // but just in case, branch to C implementation if not
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.endif
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subs COUNT, COUNT, #SAMPLES_PER_LOOP
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it lo
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bxlo lr
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push {v1-v6,sl,fp,lr}
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.set IDX1, \channels
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.set IDX2, \channels
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output4words 0, 1, DAT0, DAT1, DAT2, DAT3, DAT4, DAT5, DAT6, DAT7
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0: beq 1f
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.rept WORDS_PER_LOOP / 8
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output4words 1, 1, DAT4, DAT5, DAT6, DAT7, DAT0, DAT1, DAT2, DAT3
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output4words 1, 1, DAT0, DAT1, DAT2, DAT3, DAT4, DAT5, DAT6, DAT7
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.endr
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subs COUNT, COUNT, #SAMPLES_PER_LOOP
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bne 0b
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1:
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.rept WORDS_PER_LOOP / 8 - 1
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output4words 1, 1, DAT4, DAT5, DAT6, DAT7, DAT0, DAT1, DAT2, DAT3
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output4words 1, 1, DAT0, DAT1, DAT2, DAT3, DAT4, DAT5, DAT6, DAT7
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.endr
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output4words 1, 1, DAT4, DAT5, DAT6, DAT7, DAT0, DAT1, DAT2, DAT3, pointer_dead=1
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output4words 1, 0, DAT0, DAT1, DAT2, DAT3, DAT4, DAT5, DAT6, DAT7
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pop {v1-v6,sl,fp,pc}
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endfunc
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.purgem output4words
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.unreq CHECK
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.unreq COUNT
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.unreq IN
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.unreq OUT
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.unreq DAT0
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.unreq DAT1
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.unreq DAT2
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.unreq DAT3
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.unreq DAT4
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.unreq DAT5
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.unreq DAT6
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.unreq DAT7
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.endif // mixed
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.else // not inorder
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.ifc \shift, mixed
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// This case not currently handled
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.else // not mixed
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#if !CONFIG_THUMB
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CHECK .req a1
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COUNT .req a2
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IN .req a3
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OUT .req a4
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DAT0 .req v1
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DAT1 .req v2
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DAT2 .req v3
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DAT3 .req v4
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CHAN0 .req v5
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CHAN1 .req v6
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CHAN2 .req sl
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CHAN3 .req fp
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CHAN4 .req ip
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CHAN5 .req lr
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.macro output4words
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.if \channels == 8
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.if IDX1 == 8
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uxtb CHAN0, CHAN4, ror #0
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uxtb CHAN1, CHAN4, ror #8
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uxtb CHAN2, CHAN4, ror #16
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uxtb CHAN3, CHAN4, ror #24
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.else
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uxtb CHAN0, CHAN5, ror #0
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uxtb CHAN1, CHAN5, ror #8
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uxtb CHAN2, CHAN5, ror #16
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uxtb CHAN3, CHAN5, ror #24
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.endif
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ldr DAT0, [IN, CHAN0, lsl #2]
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ldr DAT1, [IN, CHAN1, lsl #2]
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ldr DAT2, [IN, CHAN2, lsl #2]
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ldr DAT3, [IN, CHAN3, lsl #2]
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.if IDX1 == 4
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add IN, IN, #8*4
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.endif
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decr_modulo IDX1, 4, \channels
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.else
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.set SIZE_GROUP1, IDX1
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.if SIZE_GROUP1 > 4
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.set SIZE_GROUP1, 4
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.endif
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.set SIZE_GROUP2, 4 - SIZE_GROUP1
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.if SIZE_GROUP1 == 2
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loadregoffsh2 DAT, 0, IN, CHAN, 0 + (\channels - IDX1)
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loadregoffsh2 DAT, 1, IN, CHAN, 1 + (\channels - IDX1)
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add IN, IN, #8*4
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.else // SIZE_GROUP1 == 4
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loadregoffsh2 DAT, 0, IN, CHAN, 0 + (\channels - IDX1)
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loadregoffsh2 DAT, 1, IN, CHAN, 1 + (\channels - IDX1)
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loadregoffsh2 DAT, 2, IN, CHAN, 2 + (\channels - IDX1)
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loadregoffsh2 DAT, 3, IN, CHAN, 3 + (\channels - IDX1)
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.if IDX1 == 4
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add IN, IN, #8*4
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.endif
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.endif
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decr_modulo IDX1, SIZE_GROUP1, \channels
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.if SIZE_GROUP2 == 2
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loadregoffsh2 DAT, 2, IN, CHAN, 0 + (\channels - IDX1)
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loadregoffsh2 DAT, 3, IN, CHAN, 1 + (\channels - IDX1)
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.if IDX1 == 2
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add IN, IN, #8*4
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.endif
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.endif
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decr_modulo IDX1, SIZE_GROUP2, \channels
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.endif
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.if \channels == 8 // in this case we can corrupt CHAN0-3
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rsb CHAN0, CHAN0, #8
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rsb CHAN1, CHAN1, #8
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rsb CHAN2, CHAN2, #8
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rsb CHAN3, CHAN3, #8
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lsl DAT0, #8 + \shift
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lsl DAT1, #8 + \shift
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lsl DAT2, #8 + \shift
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lsl DAT3, #8 + \shift
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eor CHECK, CHECK, DAT0, lsr CHAN0
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eor CHECK, CHECK, DAT1, lsr CHAN1
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eor CHECK, CHECK, DAT2, lsr CHAN2
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eor CHECK, CHECK, DAT3, lsr CHAN3
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.else
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.if \shift != 0
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lsl DAT0, #\shift
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lsl DAT1, #\shift
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lsl DAT2, #\shift
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lsl DAT3, #\shift
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.endif
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bic DAT0, DAT0, #0xff000000
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bic DAT1, DAT1, #0xff000000
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bic DAT2, DAT2, #0xff000000
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bic DAT3, DAT3, #0xff000000
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eorlslreg CHECK, DAT0, CHAN, 0 + (\channels - IDX2)
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eorlslreg CHECK, DAT1, CHAN, 1 + (\channels - IDX2)
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decr_modulo IDX2, 2, \channels
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eorlslreg CHECK, DAT2, CHAN, 0 + (\channels - IDX2)
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eorlslreg CHECK, DAT3, CHAN, 1 + (\channels - IDX2)
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decr_modulo IDX2, 2, \channels
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lsl DAT0, #8
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lsl DAT1, #8
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lsl DAT2, #8
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lsl DAT3, #8
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.endif
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stm OUT!, {DAT0 - DAT3}
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.endm
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.set WORDS_PER_LOOP, \channels // calculate LCM (channels, 4)
|
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.if (WORDS_PER_LOOP % 2) == 0
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|
.set WORDS_PER_LOOP, WORDS_PER_LOOP / 2
|
|
.endif
|
|
.if (WORDS_PER_LOOP % 2) == 0
|
|
.set WORDS_PER_LOOP, WORDS_PER_LOOP / 2
|
|
.endif
|
|
.set WORDS_PER_LOOP, WORDS_PER_LOOP * 4
|
|
.set SAMPLES_PER_LOOP, WORDS_PER_LOOP / \channels
|
|
|
|
function ff_mlp_pack_output_outoforder_\channels\()ch_\shift\()shift_armv6, export=1
|
|
.if SAMPLES_PER_LOOP > 1
|
|
tst COUNT, #SAMPLES_PER_LOOP - 1 // always seems to be in practice
|
|
it ne
|
|
bne X(ff_mlp_pack_output) // but just in case, branch to C implementation if not
|
|
.endif
|
|
teq COUNT, #0
|
|
it eq
|
|
bxeq lr
|
|
push {v1-v6,sl,fp,lr}
|
|
ldr CHAN0, [sp, #(9+0)*4] // get ch_assign from stack
|
|
ldr CHAN4, [CHAN0]
|
|
.if \channels == 2
|
|
uxtb CHAN0, CHAN4, ror #0
|
|
uxtb CHAN1, CHAN4, ror #8
|
|
.else
|
|
ldr CHAN5, [CHAN0, #4]
|
|
.if \channels == 6
|
|
uxtb CHAN0, CHAN4, ror #0
|
|
uxtb CHAN1, CHAN4, ror #8
|
|
uxtb CHAN2, CHAN4, ror #16
|
|
uxtb CHAN3, CHAN4, ror #24
|
|
uxtb CHAN4, CHAN5, ror #0
|
|
uxtb CHAN5, CHAN5, ror #8
|
|
.endif
|
|
.endif
|
|
.set IDX1, \channels
|
|
.set IDX2, \channels
|
|
0:
|
|
.rept WORDS_PER_LOOP / 4
|
|
output4words
|
|
.endr
|
|
subs COUNT, COUNT, #SAMPLES_PER_LOOP
|
|
bne 0b
|
|
pop {v1-v6,sl,fp,pc}
|
|
.ltorg
|
|
endfunc
|
|
.purgem output4words
|
|
|
|
.unreq CHECK
|
|
.unreq COUNT
|
|
.unreq IN
|
|
.unreq OUT
|
|
.unreq DAT0
|
|
.unreq DAT1
|
|
.unreq DAT2
|
|
.unreq DAT3
|
|
.unreq CHAN0
|
|
.unreq CHAN1
|
|
.unreq CHAN2
|
|
.unreq CHAN3
|
|
.unreq CHAN4
|
|
.unreq CHAN5
|
|
|
|
#endif // !CONFIG_THUMB
|
|
|
|
.endif // mixed
|
|
.endif // inorder
|
|
.endm // implement_pack
|
|
|
|
.macro pack_channels inorder, channels
|
|
implement_pack \inorder, \channels, 0
|
|
implement_pack \inorder, \channels, 1
|
|
implement_pack \inorder, \channels, 2
|
|
implement_pack \inorder, \channels, 3
|
|
implement_pack \inorder, \channels, 4
|
|
implement_pack \inorder, \channels, 5
|
|
implement_pack \inorder, \channels, mixed
|
|
.endm
|
|
|
|
.macro pack_order inorder
|
|
pack_channels \inorder, 2
|
|
pack_channels \inorder, 6
|
|
pack_channels \inorder, 8
|
|
.endm
|
|
|
|
pack_order 0
|
|
pack_order 1
|