/* * 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/cpu.h" #include "libavutil/mem.h" #include "libavutil/x86/asm.h" #include "libavutil/x86/cpu.h" #include "libavcodec/lpc.h" DECLARE_ASM_CONST(16, double, pd_1)[2] = { 1.0, 1.0 }; DECLARE_ASM_CONST(16, double, pd_2)[2] = { 2.0, 2.0 }; #if HAVE_SSE2_INLINE static void lpc_apply_welch_window_sse2(const int32_t *data, int len, double *w_data) { double c = 2.0 / (len-1.0); int n2 = len>>1; x86_reg i = -n2*sizeof(int32_t); x86_reg j = n2*sizeof(int32_t); __asm__ volatile( "movsd %4, %%xmm7 \n\t" "movapd "MANGLE(pd_1)", %%xmm6 \n\t" "movapd "MANGLE(pd_2)", %%xmm5 \n\t" "movlhps %%xmm7, %%xmm7 \n\t" "subpd %%xmm5, %%xmm7 \n\t" "addsd %%xmm6, %%xmm7 \n\t" "test $1, %5 \n\t" "jz 2f \n\t" #define WELCH(MOVPD, offset)\ "1: \n\t"\ "movapd %%xmm7, %%xmm1 \n\t"\ "mulpd %%xmm1, %%xmm1 \n\t"\ "movapd %%xmm6, %%xmm0 \n\t"\ "subpd %%xmm1, %%xmm0 \n\t"\ "pshufd $0x4e, %%xmm0, %%xmm1 \n\t"\ "cvtpi2pd (%3,%0), %%xmm2 \n\t"\ "cvtpi2pd "#offset"*4(%3,%1), %%xmm3 \n\t"\ "mulpd %%xmm0, %%xmm2 \n\t"\ "mulpd %%xmm1, %%xmm3 \n\t"\ "movapd %%xmm2, (%2,%0,2) \n\t"\ MOVPD" %%xmm3, "#offset"*8(%2,%1,2) \n\t"\ "subpd %%xmm5, %%xmm7 \n\t"\ "sub $8, %1 \n\t"\ "add $8, %0 \n\t"\ "jl 1b \n\t"\ WELCH("movupd", -1) "jmp 3f \n\t" "2: \n\t" WELCH("movapd", -2) "3: \n\t" :"+&r"(i), "+&r"(j) :"r"(w_data+n2), "r"(data+n2), "m"(c), "r"(len) NAMED_CONSTRAINTS_ARRAY_ADD(pd_1,pd_2) XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm5", "%xmm6", "%xmm7") ); #undef WELCH } static void lpc_compute_autocorr_sse2(const double *data, int 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) { #if HAVE_SSE2_INLINE int cpu_flags = av_get_cpu_flags(); if (HAVE_SSE2_INLINE && cpu_flags & (AV_CPU_FLAG_SSE2 | AV_CPU_FLAG_SSE2SLOW)) { c->lpc_apply_welch_window = lpc_apply_welch_window_sse2; c->lpc_compute_autocorr = lpc_compute_autocorr_sse2; } #endif /* HAVE_SSE2_INLINE */ }