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101 lines
2.8 KiB
101 lines
2.8 KiB
;****************************************************************************** |
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;* FLAC DSP functions |
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;* |
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;* Copyright (c) 2014 James Darnley <james.darnley@gmail.com> |
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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 modify |
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;* it under the terms of the GNU General Public License as published by |
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;* the Free Software Foundation; either version 2 of the License, or |
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;* (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 |
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;* GNU General Public License for more details. |
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;* |
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;* You should have received a copy of the GNU General Public License along |
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;* with FFmpeg; if not, write to the Free Software Foundation, Inc., |
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;* 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 .text |
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INIT_XMM sse4 |
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%if ARCH_X86_64 |
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cglobal flac_enc_lpc_16, 5, 7, 8, 0, res, smp, len, order, coefs |
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DECLARE_REG_TMP 5, 6 |
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%define length r2d |
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movsxd orderq, orderd |
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%else |
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cglobal flac_enc_lpc_16, 5, 6, 8, 0, res, smp, len, order, coefs |
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DECLARE_REG_TMP 2, 5 |
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%define length r2mp |
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%endif |
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; Here we assume that the maximum order value is 32. This means that we only |
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; need to copy a maximum of 32 samples. Therefore we let the preprocessor |
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; unroll this loop and copy all 32. |
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%assign iter 0 |
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%rep 32/(mmsize/4) |
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movu m0, [smpq+iter] |
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movu [resq+iter], m0 |
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%assign iter iter+mmsize |
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%endrep |
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lea resq, [resq+orderq*4] |
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lea smpq, [smpq+orderq*4] |
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lea coefsq, [coefsq+orderq*4] |
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sub length, orderd |
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movd m3, r5m |
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neg orderq |
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%define posj t0q |
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%define negj t1q |
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.looplen: |
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pxor m0, m0 |
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pxor m4, m4 |
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pxor m6, m6 |
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mov posj, orderq |
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xor negj, negj |
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.looporder: |
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movd m2, [coefsq+posj*4] ; c = coefs[j] |
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SPLATD m2 |
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movu m1, [smpq+negj*4-4] ; s = smp[i-j-1] |
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movu m5, [smpq+negj*4-4+mmsize] |
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movu m7, [smpq+negj*4-4+mmsize*2] |
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pmulld m1, m2 |
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pmulld m5, m2 |
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pmulld m7, m2 |
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paddd m0, m1 ; p += c * s |
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paddd m4, m5 |
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paddd m6, m7 |
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dec negj |
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inc posj |
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jnz .looporder |
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psrad m0, m3 ; p >>= shift |
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psrad m4, m3 |
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psrad m6, m3 |
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movu m1, [smpq] |
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movu m5, [smpq+mmsize] |
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movu m7, [smpq+mmsize*2] |
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psubd m1, m0 ; smp[i] - p |
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psubd m5, m4 |
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psubd m7, m6 |
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movu [resq], m1 ; res[i] = smp[i] - (p >> shift) |
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movu [resq+mmsize], m5 |
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movu [resq+mmsize*2], m7 |
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add resq, 3*mmsize |
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add smpq, 3*mmsize |
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sub length, (3*mmsize)/4 |
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jg .looplen |
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RET
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