LCOV - code coverage report
Current view: top level - libavcodec/x86 - lpc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 25 26 96.2 %
Date: 2017-10-18 21:45:51 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * SIMD-optimized LPC functions
       3             :  * Copyright (c) 2007 Loren Merritt
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "libavutil/attributes.h"
      23             : #include "libavutil/cpu.h"
      24             : #include "libavutil/mem.h"
      25             : #include "libavutil/x86/asm.h"
      26             : #include "libavutil/x86/cpu.h"
      27             : #include "libavcodec/lpc.h"
      28             : 
      29             : DECLARE_ASM_CONST(16, double, pd_1)[2] = { 1.0, 1.0 };
      30             : DECLARE_ASM_CONST(16, double, pd_2)[2] = { 2.0, 2.0 };
      31             : 
      32             : #if HAVE_SSE2_INLINE
      33             : 
      34        5200 : static void lpc_apply_welch_window_sse2(const int32_t *data, int len,
      35             :                                         double *w_data)
      36             : {
      37        5200 :     double c = 2.0 / (len-1.0);
      38        5200 :     int n2 = len>>1;
      39        5200 :     x86_reg i = -n2*sizeof(int32_t);
      40        5200 :     x86_reg j =  n2*sizeof(int32_t);
      41        5200 :     __asm__ volatile(
      42             :         "movsd   %4,     %%xmm7                \n\t"
      43             :         "movapd  "MANGLE(pd_1)", %%xmm6        \n\t"
      44             :         "movapd  "MANGLE(pd_2)", %%xmm5        \n\t"
      45             :         "movlhps %%xmm7, %%xmm7                \n\t"
      46             :         "subpd   %%xmm5, %%xmm7                \n\t"
      47             :         "addsd   %%xmm6, %%xmm7                \n\t"
      48             :         "test    $1,     %5                    \n\t"
      49             :         "jz      2f                            \n\t"
      50             : #define WELCH(MOVPD, offset)\
      51             :         "1:                                    \n\t"\
      52             :         "movapd   %%xmm7,  %%xmm1              \n\t"\
      53             :         "mulpd    %%xmm1,  %%xmm1              \n\t"\
      54             :         "movapd   %%xmm6,  %%xmm0              \n\t"\
      55             :         "subpd    %%xmm1,  %%xmm0              \n\t"\
      56             :         "pshufd   $0x4e,   %%xmm0, %%xmm1      \n\t"\
      57             :         "cvtpi2pd (%3,%0), %%xmm2              \n\t"\
      58             :         "cvtpi2pd "#offset"*4(%3,%1), %%xmm3   \n\t"\
      59             :         "mulpd    %%xmm0,  %%xmm2              \n\t"\
      60             :         "mulpd    %%xmm1,  %%xmm3              \n\t"\
      61             :         "movapd   %%xmm2, (%2,%0,2)            \n\t"\
      62             :         MOVPD"    %%xmm3, "#offset"*8(%2,%1,2) \n\t"\
      63             :         "subpd    %%xmm5,  %%xmm7              \n\t"\
      64             :         "sub      $8,      %1                  \n\t"\
      65             :         "add      $8,      %0                  \n\t"\
      66             :         "jl 1b                                 \n\t"\
      67             : 
      68             :         WELCH("movupd", -1)
      69             :         "jmp 3f                                \n\t"
      70             :         "2:                                    \n\t"
      71             :         WELCH("movapd", -2)
      72             :         "3:                                    \n\t"
      73             :         :"+&r"(i), "+&r"(j)
      74        5200 :         :"r"(w_data+n2), "r"(data+n2), "m"(c), "r"(len)
      75             :          NAMED_CONSTRAINTS_ARRAY_ADD(pd_1,pd_2)
      76             :          XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
      77             :                                     "%xmm5", "%xmm6", "%xmm7")
      78             :     );
      79             : #undef WELCH
      80        5200 : }
      81             : 
      82        5200 : static void lpc_compute_autocorr_sse2(const double *data, int len, int lag,
      83             :                                       double *autoc)
      84             : {
      85             :     int j;
      86             : 
      87        5200 :     if((x86_reg)data & 15)
      88           0 :         data++;
      89             : 
      90       26000 :     for(j=0; j<lag; j+=2){
      91       20800 :         x86_reg i = -len*sizeof(double);
      92       20800 :         if(j == lag-2) {
      93        5200 :             __asm__ volatile(
      94             :                 "movsd    "MANGLE(pd_1)", %%xmm0    \n\t"
      95             :                 "movsd    "MANGLE(pd_1)", %%xmm1    \n\t"
      96             :                 "movsd    "MANGLE(pd_1)", %%xmm2    \n\t"
      97             :                 "1:                                 \n\t"
      98             :                 "movapd   (%2,%0), %%xmm3           \n\t"
      99             :                 "movupd -8(%3,%0), %%xmm4           \n\t"
     100             :                 "movapd   (%3,%0), %%xmm5           \n\t"
     101             :                 "mulpd     %%xmm3, %%xmm4           \n\t"
     102             :                 "mulpd     %%xmm3, %%xmm5           \n\t"
     103             :                 "mulpd -16(%3,%0), %%xmm3           \n\t"
     104             :                 "addpd     %%xmm4, %%xmm1           \n\t"
     105             :                 "addpd     %%xmm5, %%xmm0           \n\t"
     106             :                 "addpd     %%xmm3, %%xmm2           \n\t"
     107             :                 "add       $16,    %0               \n\t"
     108             :                 "jl 1b                              \n\t"
     109             :                 "movhlps   %%xmm0, %%xmm3           \n\t"
     110             :                 "movhlps   %%xmm1, %%xmm4           \n\t"
     111             :                 "movhlps   %%xmm2, %%xmm5           \n\t"
     112             :                 "addsd     %%xmm3, %%xmm0           \n\t"
     113             :                 "addsd     %%xmm4, %%xmm1           \n\t"
     114             :                 "addsd     %%xmm5, %%xmm2           \n\t"
     115             :                 "movsd     %%xmm0,   (%1)           \n\t"
     116             :                 "movsd     %%xmm1,  8(%1)           \n\t"
     117             :                 "movsd     %%xmm2, 16(%1)           \n\t"
     118             :                 :"+&r"(i)
     119        5200 :                 :"r"(autoc+j), "r"(data+len), "r"(data+len-j)
     120             :                  NAMED_CONSTRAINTS_ARRAY_ADD(pd_1)
     121             :                 :"memory"
     122             :             );
     123             :         } else {
     124       15600 :             __asm__ volatile(
     125             :                 "movsd    "MANGLE(pd_1)", %%xmm0    \n\t"
     126             :                 "movsd    "MANGLE(pd_1)", %%xmm1    \n\t"
     127             :                 "1:                                 \n\t"
     128             :                 "movapd   (%3,%0), %%xmm3           \n\t"
     129             :                 "movupd -8(%4,%0), %%xmm4           \n\t"
     130             :                 "mulpd     %%xmm3, %%xmm4           \n\t"
     131             :                 "mulpd    (%4,%0), %%xmm3           \n\t"
     132             :                 "addpd     %%xmm4, %%xmm1           \n\t"
     133             :                 "addpd     %%xmm3, %%xmm0           \n\t"
     134             :                 "add       $16,    %0               \n\t"
     135             :                 "jl 1b                              \n\t"
     136             :                 "movhlps   %%xmm0, %%xmm3           \n\t"
     137             :                 "movhlps   %%xmm1, %%xmm4           \n\t"
     138             :                 "addsd     %%xmm3, %%xmm0           \n\t"
     139             :                 "addsd     %%xmm4, %%xmm1           \n\t"
     140             :                 "movsd     %%xmm0, %1               \n\t"
     141             :                 "movsd     %%xmm1, %2               \n\t"
     142       15600 :                 :"+&r"(i), "=m"(autoc[j]), "=m"(autoc[j+1])
     143       15600 :                 :"r"(data+len), "r"(data+len-j)
     144             :                  NAMED_CONSTRAINTS_ARRAY_ADD(pd_1)
     145             :             );
     146             :         }
     147             :     }
     148        5200 : }
     149             : 
     150             : #endif /* HAVE_SSE2_INLINE */
     151             : 
     152          64 : av_cold void ff_lpc_init_x86(LPCContext *c)
     153             : {
     154             : #if HAVE_SSE2_INLINE
     155          64 :     int cpu_flags = av_get_cpu_flags();
     156             : 
     157          64 :     if (INLINE_SSE2(cpu_flags) || INLINE_SSE2_SLOW(cpu_flags)) {
     158          16 :         c->lpc_apply_welch_window = lpc_apply_welch_window_sse2;
     159          16 :         c->lpc_compute_autocorr   = lpc_compute_autocorr_sse2;
     160             :     }
     161             : #endif /* HAVE_SSE2_INLINE */
     162          64 : }

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