f0b7882ceb
The .text section is already 16-byte aligned by default on all supported platforms so `SECTION_TEXT` isn't any different from `SECTION .text`.
102 lines
2.8 KiB
NASM
102 lines
2.8 KiB
NASM
;******************************************************************************
|
|
;* FLAC DSP functions
|
|
;*
|
|
;* Copyright (c) 2014 James Darnley <james.darnley@gmail.com>
|
|
;*
|
|
;* This file is part of FFmpeg.
|
|
;*
|
|
;* FFmpeg is free software; you can redistribute it and/or modify
|
|
;* it under the terms of the GNU General Public License as published by
|
|
;* the Free Software Foundation; either version 2 of the License, or
|
|
;* (at your option) any later version.
|
|
;*
|
|
;* FFmpeg is distributed in the hope that it will be useful,
|
|
;* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;* GNU General Public License for more details.
|
|
;*
|
|
;* You should have received a copy of the GNU General Public License along
|
|
;* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
|
|
;* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
;******************************************************************************
|
|
|
|
%include "libavutil/x86/x86util.asm"
|
|
|
|
SECTION .text
|
|
|
|
INIT_XMM sse4
|
|
%if ARCH_X86_64
|
|
cglobal flac_enc_lpc_16, 5, 7, 8, 0, res, smp, len, order, coefs
|
|
DECLARE_REG_TMP 5, 6
|
|
%define length r2d
|
|
|
|
movsxd orderq, orderd
|
|
%else
|
|
cglobal flac_enc_lpc_16, 5, 6, 8, 0, res, smp, len, order, coefs
|
|
DECLARE_REG_TMP 2, 5
|
|
%define length r2mp
|
|
%endif
|
|
|
|
; Here we assume that the maximum order value is 32. This means that we only
|
|
; need to copy a maximum of 32 samples. Therefore we let the preprocessor
|
|
; unroll this loop and copy all 32.
|
|
%assign iter 0
|
|
%rep 32/(mmsize/4)
|
|
movu m0, [smpq+iter]
|
|
movu [resq+iter], m0
|
|
%assign iter iter+mmsize
|
|
%endrep
|
|
|
|
lea resq, [resq+orderq*4]
|
|
lea smpq, [smpq+orderq*4]
|
|
lea coefsq, [coefsq+orderq*4]
|
|
sub length, orderd
|
|
movd m3, r5m
|
|
neg orderq
|
|
|
|
%define posj t0q
|
|
%define negj t1q
|
|
|
|
.looplen:
|
|
pxor m0, m0
|
|
pxor m4, m4
|
|
pxor m6, m6
|
|
mov posj, orderq
|
|
xor negj, negj
|
|
|
|
.looporder:
|
|
movd m2, [coefsq+posj*4] ; c = coefs[j]
|
|
SPLATD m2
|
|
movu m1, [smpq+negj*4-4] ; s = smp[i-j-1]
|
|
movu m5, [smpq+negj*4-4+mmsize]
|
|
movu m7, [smpq+negj*4-4+mmsize*2]
|
|
pmulld m1, m2
|
|
pmulld m5, m2
|
|
pmulld m7, m2
|
|
paddd m0, m1 ; p += c * s
|
|
paddd m4, m5
|
|
paddd m6, m7
|
|
|
|
dec negj
|
|
inc posj
|
|
jnz .looporder
|
|
|
|
psrad m0, m3 ; p >>= shift
|
|
psrad m4, m3
|
|
psrad m6, m3
|
|
movu m1, [smpq]
|
|
movu m5, [smpq+mmsize]
|
|
movu m7, [smpq+mmsize*2]
|
|
psubd m1, m0 ; smp[i] - p
|
|
psubd m5, m4
|
|
psubd m7, m6
|
|
movu [resq], m1 ; res[i] = smp[i] - (p >> shift)
|
|
movu [resq+mmsize], m5
|
|
movu [resq+mmsize*2], m7
|
|
|
|
add resq, 3*mmsize
|
|
add smpq, 3*mmsize
|
|
sub length, (3*mmsize)/4
|
|
jg .looplen
|
|
RET
|