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/*
* SIMD-optimized LPC functions
* Copyright (c) 2007 Loren Merritt
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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/attributes.h"
#include "libavutil/x86/asm.h"
#include "libavutil/x86/cpu.h"
#include "libavcodec/lpc.h"
void ff_lpc_apply_welch_window_sse2(const int32_t *data, ptrdiff_t len,
double *w_data);
void ff_lpc_apply_welch_window_avx2(const int32_t *data, ptrdiff_t len,
double *w_data);
DECLARE_ASM_CONST(16, double, pd_1)[2] = { 1.0, 1.0 };
#if HAVE_SSE2_INLINE
static void lpc_compute_autocorr_sse2(const double *data, ptrdiff_t len, int lag,
double *autoc)
{
int j;
if((x86_reg)data & 15)
data++;
for(j=0; j<lag; j+=2){
x86_reg i = -len*sizeof(double);
if(j == lag-2) {
__asm__ volatile(
"movsd "MANGLE(pd_1)", %%xmm0 \n\t"
"movsd "MANGLE(pd_1)", %%xmm1 \n\t"
"movsd "MANGLE(pd_1)", %%xmm2 \n\t"
"1: \n\t"
"movapd (%2,%0), %%xmm3 \n\t"
"movupd -8(%3,%0), %%xmm4 \n\t"
"movapd (%3,%0), %%xmm5 \n\t"
"mulpd %%xmm3, %%xmm4 \n\t"
"mulpd %%xmm3, %%xmm5 \n\t"
"mulpd -16(%3,%0), %%xmm3 \n\t"
"addpd %%xmm4, %%xmm1 \n\t"
"addpd %%xmm5, %%xmm0 \n\t"
"addpd %%xmm3, %%xmm2 \n\t"
"add $16, %0 \n\t"
"jl 1b \n\t"
"movhlps %%xmm0, %%xmm3 \n\t"
"movhlps %%xmm1, %%xmm4 \n\t"
"movhlps %%xmm2, %%xmm5 \n\t"
"addsd %%xmm3, %%xmm0 \n\t"
"addsd %%xmm4, %%xmm1 \n\t"
"addsd %%xmm5, %%xmm2 \n\t"
"movsd %%xmm0, (%1) \n\t"
"movsd %%xmm1, 8(%1) \n\t"
"movsd %%xmm2, 16(%1) \n\t"
:"+&r"(i)
:"r"(autoc+j), "r"(data+len), "r"(data+len-j)
NAMED_CONSTRAINTS_ARRAY_ADD(pd_1)
:"memory"
);
} else {
__asm__ volatile(
"movsd "MANGLE(pd_1)", %%xmm0 \n\t"
"movsd "MANGLE(pd_1)", %%xmm1 \n\t"
"1: \n\t"
"movapd (%3,%0), %%xmm3 \n\t"
"movupd -8(%4,%0), %%xmm4 \n\t"
"mulpd %%xmm3, %%xmm4 \n\t"
"mulpd (%4,%0), %%xmm3 \n\t"
"addpd %%xmm4, %%xmm1 \n\t"
"addpd %%xmm3, %%xmm0 \n\t"
"add $16, %0 \n\t"
"jl 1b \n\t"
"movhlps %%xmm0, %%xmm3 \n\t"
"movhlps %%xmm1, %%xmm4 \n\t"
"addsd %%xmm3, %%xmm0 \n\t"
"addsd %%xmm4, %%xmm1 \n\t"
"movsd %%xmm0, %1 \n\t"
"movsd %%xmm1, %2 \n\t"
:"+&r"(i), "=m"(autoc[j]), "=m"(autoc[j+1])
:"r"(data+len), "r"(data+len-j)
NAMED_CONSTRAINTS_ARRAY_ADD(pd_1)
);
}
}
}
#endif /* HAVE_SSE2_INLINE */
av_cold void ff_lpc_init_x86(LPCContext *c)
{
int cpu_flags = av_get_cpu_flags();
#if HAVE_SSE2_INLINE
if (INLINE_SSE2_SLOW(cpu_flags))
c->lpc_compute_autocorr = lpc_compute_autocorr_sse2;
#endif
if (EXTERNAL_SSE2(cpu_flags))
c->lpc_apply_welch_window = ff_lpc_apply_welch_window_sse2;
if (EXTERNAL_AVX2(cpu_flags))
c->lpc_apply_welch_window = ff_lpc_apply_welch_window_avx2;
}
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