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139 lines
3.7 KiB
139 lines
3.7 KiB
/* |
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* Copyright (c) 2015 James Almer |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVUTIL_X86_INTMATH_H |
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#define AVUTIL_X86_INTMATH_H |
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#include <stdint.h> |
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#include <stdlib.h> |
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#if HAVE_FAST_CLZ |
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#if defined(_MSC_VER) |
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#include <intrin.h> |
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#elif defined(__INTEL_COMPILER) |
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#include <immintrin.h> |
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#endif |
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#endif |
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#include "config.h" |
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#if HAVE_FAST_CLZ |
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#if (defined(__INTEL_COMPILER) && (__INTEL_COMPILER>=1216)) || defined(_MSC_VER) |
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# if defined(__INTEL_COMPILER) |
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# define ff_log2(x) (_bit_scan_reverse((x)|1)) |
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# else |
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# define ff_log2 ff_log2_x86 |
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static av_always_inline av_const int ff_log2_x86(unsigned int v) |
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{ |
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unsigned long n; |
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_BitScanReverse(&n, v|1); |
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return n; |
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} |
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# endif |
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# define ff_log2_16bit av_log2 |
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#if defined(__INTEL_COMPILER) || (defined(_MSC_VER) && (_MSC_VER >= 1700) && \ |
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(defined(__BMI__) || !defined(__clang__))) |
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# define ff_ctz(v) _tzcnt_u32(v) |
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# if ARCH_X86_64 |
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# define ff_ctzll(v) _tzcnt_u64(v) |
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# else |
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# define ff_ctzll ff_ctzll_x86 |
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static av_always_inline av_const int ff_ctzll_x86(long long v) |
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{ |
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return ((uint32_t)v == 0) ? _tzcnt_u32((uint32_t)(v >> 32)) + 32 : _tzcnt_u32((uint32_t)v); |
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} |
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# endif |
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#endif /* _MSC_VER */ |
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#endif /* __INTEL_COMPILER */ |
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#endif /* HAVE_FAST_CLZ */ |
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#if defined(__GNUC__) |
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/* Our generic version of av_popcount is faster than GCC's built-in on |
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* CPUs that don't support the popcnt instruction. |
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*/ |
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#if defined(__POPCNT__) |
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#define av_popcount __builtin_popcount |
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#if ARCH_X86_64 |
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#define av_popcount64 __builtin_popcountll |
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#endif |
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#endif /* __POPCNT__ */ |
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#if defined(__BMI2__) |
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#if AV_GCC_VERSION_AT_LEAST(5,1) |
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#define av_mod_uintp2 __builtin_ia32_bzhi_si |
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#elif HAVE_INLINE_ASM |
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/* GCC releases before 5.1.0 have a broken bzhi builtin, so for those we |
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* implement it using inline assembly |
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*/ |
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#define av_mod_uintp2 av_mod_uintp2_bmi2 |
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static av_always_inline av_const unsigned av_mod_uintp2_bmi2(unsigned a, unsigned p) |
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{ |
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if (av_builtin_constant_p(p)) |
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return a & ((1 << p) - 1); |
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else { |
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unsigned x; |
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__asm__ ("bzhi %2, %1, %0 \n\t" : "=r"(x) : "rm"(a), "r"(p)); |
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return x; |
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} |
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} |
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#endif /* AV_GCC_VERSION_AT_LEAST */ |
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#endif /* __BMI2__ */ |
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#if defined(__SSE2__) && !defined(__INTEL_COMPILER) |
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#define av_clipd av_clipd_sse2 |
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static av_always_inline av_const double av_clipd_sse2(double a, double amin, double amax) |
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{ |
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#if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2 |
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if (amin > amax) abort(); |
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#endif |
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__asm__ ("minsd %2, %0 \n\t" |
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"maxsd %1, %0 \n\t" |
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: "+&x"(a) : "xm"(amin), "xm"(amax)); |
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return a; |
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} |
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#endif /* __SSE2__ */ |
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#if defined(__SSE__) && !defined(__INTEL_COMPILER) |
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#define av_clipf av_clipf_sse |
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static av_always_inline av_const float av_clipf_sse(float a, float amin, float amax) |
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{ |
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#if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2 |
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if (amin > amax) abort(); |
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#endif |
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__asm__ ("minss %2, %0 \n\t" |
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"maxss %1, %0 \n\t" |
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: "+&x"(a) : "xm"(amin), "xm"(amax)); |
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return a; |
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} |
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#endif /* __SSE__ */ |
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#endif /* __GNUC__ */ |
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#endif /* AVUTIL_X86_INTMATH_H */
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