LCOV - code coverage report
Current view: top level - libavutil/x86 - intmath.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 6 6 100.0 %
Date: 2017-10-24 00:14:43 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2015 James Almer
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #ifndef AVUTIL_X86_INTMATH_H
      22             : #define AVUTIL_X86_INTMATH_H
      23             : 
      24             : #include <stdint.h>
      25             : #include <stdlib.h>
      26             : #if HAVE_FAST_CLZ
      27             : #if defined(_MSC_VER)
      28             : #include <intrin.h>
      29             : #elif defined(__INTEL_COMPILER)
      30             : #include <immintrin.h>
      31             : #endif
      32             : #endif
      33             : #include "config.h"
      34             : 
      35             : #if HAVE_FAST_CLZ
      36             : #if (defined(__INTEL_COMPILER) && (__INTEL_COMPILER>=1216)) || defined(_MSC_VER)
      37             : #   if defined(__INTEL_COMPILER)
      38             : #       define ff_log2(x) (_bit_scan_reverse((x)|1))
      39             : #   else
      40             : #       define ff_log2 ff_log2_x86
      41             : static av_always_inline av_const int ff_log2_x86(unsigned int v)
      42             : {
      43             :     unsigned long n;
      44             :     _BitScanReverse(&n, v|1);
      45             :     return n;
      46             : }
      47             : #   endif
      48             : #   define ff_log2_16bit av_log2
      49             : 
      50             : #if defined(__INTEL_COMPILER) || (defined(_MSC_VER) && (_MSC_VER >= 1700))
      51             : #   define ff_ctz(v) _tzcnt_u32(v)
      52             : 
      53             : #   if ARCH_X86_64
      54             : #       define ff_ctzll(v) _tzcnt_u64(v)
      55             : #   else
      56             : #       define ff_ctzll ff_ctzll_x86
      57             : static av_always_inline av_const int ff_ctzll_x86(long long v)
      58             : {
      59             :     return ((uint32_t)v == 0) ? _tzcnt_u32((uint32_t)(v >> 32)) + 32 : _tzcnt_u32((uint32_t)v);
      60             : }
      61             : #   endif
      62             : #endif /* _MSC_VER */
      63             : 
      64             : #endif /* __INTEL_COMPILER */
      65             : 
      66             : #endif /* HAVE_FAST_CLZ */
      67             : 
      68             : #if defined(__GNUC__)
      69             : 
      70             : /* Our generic version of av_popcount is faster than GCC's built-in on
      71             :  * CPUs that don't support the popcnt instruction.
      72             :  */
      73             : #if defined(__POPCNT__)
      74             :     #define av_popcount   __builtin_popcount
      75             : #if ARCH_X86_64
      76             :     #define av_popcount64 __builtin_popcountll
      77             : #endif
      78             : 
      79             : #endif /* __POPCNT__ */
      80             : 
      81             : #if defined(__BMI2__)
      82             : 
      83             : #if AV_GCC_VERSION_AT_LEAST(5,1)
      84             : #define av_mod_uintp2 __builtin_ia32_bzhi_si
      85             : #elif HAVE_INLINE_ASM
      86             : /* GCC releases before 5.1.0 have a broken bzhi builtin, so for those we
      87             :  * implement it using inline assembly
      88             :  */
      89             : #define av_mod_uintp2 av_mod_uintp2_bmi2
      90             : static av_always_inline av_const unsigned av_mod_uintp2_bmi2(unsigned a, unsigned p)
      91             : {
      92             :     if (av_builtin_constant_p(p))
      93             :         return a & ((1 << p) - 1);
      94             :     else {
      95             :         unsigned x;
      96             :         __asm__ ("bzhi %2, %1, %0 \n\t" : "=r"(x) : "rm"(a), "r"(p));
      97             :         return x;
      98             :     }
      99             : }
     100             : #endif /* AV_GCC_VERSION_AT_LEAST */
     101             : 
     102             : #endif /* __BMI2__ */
     103             : 
     104             : #if defined(__SSE2__) && !defined(__INTEL_COMPILER)
     105             : 
     106             : #define av_clipd av_clipd_sse2
     107     2057982 : static av_always_inline av_const double av_clipd_sse2(double a, double amin, double amax)
     108             : {
     109             : #if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
     110             :     if (amin > amax) abort();
     111             : #endif
     112     2057982 :     __asm__ ("minsd %2, %0 \n\t"
     113             :              "maxsd %1, %0 \n\t"
     114             :              : "+&x"(a) : "xm"(amin), "xm"(amax));
     115     2057982 :     return a;
     116             : }
     117             : 
     118             : #endif /* __SSE2__ */
     119             : 
     120             : #if defined(__SSE__) && !defined(__INTEL_COMPILER)
     121             : 
     122             : #define av_clipf av_clipf_sse
     123     7500369 : static av_always_inline av_const float av_clipf_sse(float a, float amin, float amax)
     124             : {
     125             : #if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
     126             :     if (amin > amax) abort();
     127             : #endif
     128     7500369 :     __asm__ ("minss %2, %0 \n\t"
     129             :              "maxss %1, %0 \n\t"
     130             :              : "+&x"(a) : "xm"(amin), "xm"(amax));
     131     7500369 :     return a;
     132             : }
     133             : 
     134             : #endif /* __SSE__ */
     135             : 
     136             : #endif /* __GNUC__ */
     137             : 
     138             : #endif /* AVUTIL_X86_INTMATH_H */

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