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: 2018-04-19 23:07:36 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             :                                   (defined(__BMI__) || !defined(__clang__)))
      52             : #   define ff_ctz(v) _tzcnt_u32(v)
      53             : 
      54             : #   if ARCH_X86_64
      55             : #       define ff_ctzll(v) _tzcnt_u64(v)
      56             : #   else
      57             : #       define ff_ctzll ff_ctzll_x86
      58             : static av_always_inline av_const int ff_ctzll_x86(long long v)
      59             : {
      60             :     return ((uint32_t)v == 0) ? _tzcnt_u32((uint32_t)(v >> 32)) + 32 : _tzcnt_u32((uint32_t)v);
      61             : }
      62             : #   endif
      63             : #endif /* _MSC_VER */
      64             : 
      65             : #endif /* __INTEL_COMPILER */
      66             : 
      67             : #endif /* HAVE_FAST_CLZ */
      68             : 
      69             : #if defined(__GNUC__)
      70             : 
      71             : /* Our generic version of av_popcount is faster than GCC's built-in on
      72             :  * CPUs that don't support the popcnt instruction.
      73             :  */
      74             : #if defined(__POPCNT__)
      75             :     #define av_popcount   __builtin_popcount
      76             : #if ARCH_X86_64
      77             :     #define av_popcount64 __builtin_popcountll
      78             : #endif
      79             : 
      80             : #endif /* __POPCNT__ */
      81             : 
      82             : #if defined(__BMI2__)
      83             : 
      84             : #if AV_GCC_VERSION_AT_LEAST(5,1)
      85             : #define av_mod_uintp2 __builtin_ia32_bzhi_si
      86             : #elif HAVE_INLINE_ASM
      87             : /* GCC releases before 5.1.0 have a broken bzhi builtin, so for those we
      88             :  * implement it using inline assembly
      89             :  */
      90             : #define av_mod_uintp2 av_mod_uintp2_bmi2
      91             : static av_always_inline av_const unsigned av_mod_uintp2_bmi2(unsigned a, unsigned p)
      92             : {
      93             :     if (av_builtin_constant_p(p))
      94             :         return a & ((1 << p) - 1);
      95             :     else {
      96             :         unsigned x;
      97             :         __asm__ ("bzhi %2, %1, %0 \n\t" : "=r"(x) : "rm"(a), "r"(p));
      98             :         return x;
      99             :     }
     100             : }
     101             : #endif /* AV_GCC_VERSION_AT_LEAST */
     102             : 
     103             : #endif /* __BMI2__ */
     104             : 
     105             : #if defined(__SSE2__) && !defined(__INTEL_COMPILER)
     106             : 
     107             : #define av_clipd av_clipd_sse2
     108     2057982 : static av_always_inline av_const double av_clipd_sse2(double a, double amin, double amax)
     109             : {
     110             : #if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
     111             :     if (amin > amax) abort();
     112             : #endif
     113     2057982 :     __asm__ ("minsd %2, %0 \n\t"
     114             :              "maxsd %1, %0 \n\t"
     115             :              : "+&x"(a) : "xm"(amin), "xm"(amax));
     116     2057982 :     return a;
     117             : }
     118             : 
     119             : #endif /* __SSE2__ */
     120             : 
     121             : #if defined(__SSE__) && !defined(__INTEL_COMPILER)
     122             : 
     123             : #define av_clipf av_clipf_sse
     124     5817833 : static av_always_inline av_const float av_clipf_sse(float a, float amin, float amax)
     125             : {
     126             : #if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
     127             :     if (amin > amax) abort();
     128             : #endif
     129     5817833 :     __asm__ ("minss %2, %0 \n\t"
     130             :              "maxss %1, %0 \n\t"
     131             :              : "+&x"(a) : "xm"(amin), "xm"(amax));
     132     5817833 :     return a;
     133             : }
     134             : 
     135             : #endif /* __SSE__ */
     136             : 
     137             : #endif /* __GNUC__ */
     138             : 
     139             : #endif /* AVUTIL_X86_INTMATH_H */

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