diff options
Diffstat (limited to 'libavcodec/x86/flacdsp_mmx.c')
| -rw-r--r-- | libavcodec/x86/flacdsp_mmx.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/libavcodec/x86/flacdsp_mmx.c b/libavcodec/x86/flacdsp_mmx.c new file mode 100644 index 0000000000..01c0d7ae8a --- /dev/null +++ b/libavcodec/x86/flacdsp_mmx.c @@ -0,0 +1,139 @@ +/* + * MMX optimized FLAC DSP utils + * 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/x86_cpu.h" +#include "dsputil_mmx.h" + +static void 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 %0, %%xmm7 \n\t" + "movapd "MANGLE(ff_pd_1)", %%xmm6 \n\t" + "movapd "MANGLE(ff_pd_2)", %%xmm5 \n\t" + "movlhps %%xmm7, %%xmm7 \n\t" + "subpd %%xmm5, %%xmm7 \n\t" + "addsd %%xmm6, %%xmm7 \n\t" + ::"m"(c) + ); +#define WELCH(MOVPD, offset)\ + __asm__ volatile(\ + "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"\ + :"+&r"(i), "+&r"(j)\ + :"r"(w_data+n2), "r"(data+n2)\ + ); + if(len&1) + WELCH("movupd", -1) + else + WELCH("movapd", -2) +#undef WELCH +} + +void ff_flac_compute_autocorr_sse2(const int32_t *data, int len, int lag, + double *autoc) +{ + double tmp[len + lag + 2]; + double *data1 = tmp + lag; + int j; + + if((x86_reg)data1 & 15) + data1++; + + apply_welch_window_sse2(data, len, data1); + + for(j=0; j<lag; j++) + data1[j-lag]= 0.0; + data1[len] = 0.0; + + for(j=0; j<lag; j+=2){ + x86_reg i = -len*sizeof(double); + if(j == lag-2) { + __asm__ volatile( + "movsd "MANGLE(ff_pd_1)", %%xmm0 \n\t" + "movsd "MANGLE(ff_pd_1)", %%xmm1 \n\t" + "movsd "MANGLE(ff_pd_1)", %%xmm2 \n\t" + "1: \n\t" + "movapd (%4,%0), %%xmm3 \n\t" + "movupd -8(%5,%0), %%xmm4 \n\t" + "movapd (%5,%0), %%xmm5 \n\t" + "mulpd %%xmm3, %%xmm4 \n\t" + "mulpd %%xmm3, %%xmm5 \n\t" + "mulpd -16(%5,%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, %2 \n\t" + "movsd %%xmm2, %3 \n\t" + :"+&r"(i), "=m"(autoc[j]), "=m"(autoc[j+1]), "=m"(autoc[j+2]) + :"r"(data1+len), "r"(data1+len-j) + ); + } else { + __asm__ volatile( + "movsd "MANGLE(ff_pd_1)", %%xmm0 \n\t" + "movsd "MANGLE(ff_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"(data1+len), "r"(data1+len-j) + ); + } + } +} |