| /* |
| * 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; |
| } |
