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Diffstat (limited to 'deps/flac-1.3.2/src/libFLAC/include/private/bitmath.h')
| -rw-r--r-- | deps/flac-1.3.2/src/libFLAC/include/private/bitmath.h | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/deps/flac-1.3.2/src/libFLAC/include/private/bitmath.h b/deps/flac-1.3.2/src/libFLAC/include/private/bitmath.h deleted file mode 100644 index 9c75f85..0000000 --- a/deps/flac-1.3.2/src/libFLAC/include/private/bitmath.h +++ /dev/null @@ -1,210 +0,0 @@ -/* libFLAC - Free Lossless Audio Codec library - * Copyright (C) 2001-2009 Josh Coalson - * Copyright (C) 2011-2016 Xiph.Org Foundation - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * - Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * - Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * - Neither the name of the Xiph.org Foundation nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef FLAC__PRIVATE__BITMATH_H -#define FLAC__PRIVATE__BITMATH_H - -#include "FLAC/ordinals.h" -#include "FLAC/assert.h" - -#include "share/compat.h" - -#if defined(_MSC_VER) -#include <intrin.h> /* for _BitScanReverse* */ -#endif - -/* Will never be emitted for MSVC, GCC, Intel compilers */ -static inline unsigned int FLAC__clz_soft_uint32(FLAC__uint32 word) -{ - static const unsigned char byte_to_unary_table[] = { - 8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, - 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - }; - - return word > 0xffffff ? byte_to_unary_table[word >> 24] : - word > 0xffff ? byte_to_unary_table[word >> 16] + 8 : - word > 0xff ? byte_to_unary_table[word >> 8] + 16 : - byte_to_unary_table[word] + 24; -} - -static inline unsigned int FLAC__clz_uint32(FLAC__uint32 v) -{ -/* Never used with input 0 */ - FLAC__ASSERT(v > 0); -#if defined(__INTEL_COMPILER) - return _bit_scan_reverse(v) ^ 31U; -#elif defined(__GNUC__) && (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)) -/* This will translate either to (bsr ^ 31U), clz , ctlz, cntlz, lzcnt depending on - * -march= setting or to a software routine in exotic machines. */ - return __builtin_clz(v); -#elif defined(_MSC_VER) - { - unsigned long idx; - _BitScanReverse(&idx, v); - return idx ^ 31U; - } -#else - return FLAC__clz_soft_uint32(v); -#endif -} - -/* Used when 64-bit bsr/clz is unavailable; can use 32-bit bsr/clz when possible */ -static inline unsigned int FLAC__clz_soft_uint64(FLAC__uint64 word) -{ - return (FLAC__uint32)(word>>32) ? FLAC__clz_uint32((FLAC__uint32)(word>>32)) : - FLAC__clz_uint32((FLAC__uint32)word) + 32; -} - -static inline unsigned int FLAC__clz_uint64(FLAC__uint64 v) -{ - /* Never used with input 0 */ - FLAC__ASSERT(v > 0); -#if defined(__GNUC__) && (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)) - return __builtin_clzll(v); -#elif (defined(__INTEL_COMPILER) || defined(_MSC_VER)) && (defined(_M_IA64) || defined(_M_X64)) - { - unsigned long idx; - _BitScanReverse64(&idx, v); - return idx ^ 63U; - } -#else - return FLAC__clz_soft_uint64(v); -#endif -} - -/* These two functions work with input 0 */ -static inline unsigned int FLAC__clz2_uint32(FLAC__uint32 v) -{ - if (!v) - return 32; - return FLAC__clz_uint32(v); -} - -static inline unsigned int FLAC__clz2_uint64(FLAC__uint64 v) -{ - if (!v) - return 64; - return FLAC__clz_uint64(v); -} - -/* An example of what FLAC__bitmath_ilog2() computes: - * - * ilog2( 0) = assertion failure - * ilog2( 1) = 0 - * ilog2( 2) = 1 - * ilog2( 3) = 1 - * ilog2( 4) = 2 - * ilog2( 5) = 2 - * ilog2( 6) = 2 - * ilog2( 7) = 2 - * ilog2( 8) = 3 - * ilog2( 9) = 3 - * ilog2(10) = 3 - * ilog2(11) = 3 - * ilog2(12) = 3 - * ilog2(13) = 3 - * ilog2(14) = 3 - * ilog2(15) = 3 - * ilog2(16) = 4 - * ilog2(17) = 4 - * ilog2(18) = 4 - */ - -static inline unsigned FLAC__bitmath_ilog2(FLAC__uint32 v) -{ - FLAC__ASSERT(v > 0); -#if defined(__INTEL_COMPILER) - return _bit_scan_reverse(v); -#elif defined(_MSC_VER) - { - unsigned long idx; - _BitScanReverse(&idx, v); - return idx; - } -#else - return FLAC__clz_uint32(v) ^ 31U; -#endif -} - -static inline unsigned FLAC__bitmath_ilog2_wide(FLAC__uint64 v) -{ - FLAC__ASSERT(v > 0); -#if defined(__GNUC__) && (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)) - return __builtin_clzll(v) ^ 63U; -/* Sorry, only supported in x64/Itanium.. and both have fast FPU which makes integer-only encoder pointless */ -#elif (defined(__INTEL_COMPILER) || defined(_MSC_VER)) && (defined(_M_IA64) || defined(_M_X64)) - { - unsigned long idx; - _BitScanReverse64(&idx, v); - return idx; - } -#else -/* Brain-damaged compilers will use the fastest possible way that is, - de Bruijn sequences (http://supertech.csail.mit.edu/papers/debruijn.pdf) - (C) Timothy B. Terriberry (tterribe@xiph.org) 2001-2009 CC0 (Public domain). -*/ - { - static const unsigned char DEBRUIJN_IDX64[64]={ - 0, 1, 2, 7, 3,13, 8,19, 4,25,14,28, 9,34,20,40, - 5,17,26,38,15,46,29,48,10,31,35,54,21,50,41,57, - 63, 6,12,18,24,27,33,39,16,37,45,47,30,53,49,56, - 62,11,23,32,36,44,52,55,61,22,43,51,60,42,59,58 - }; - v|= v>>1; - v|= v>>2; - v|= v>>4; - v|= v>>8; - v|= v>>16; - v|= v>>32; - v= (v>>1)+1; - return DEBRUIJN_IDX64[v*FLAC__U64L(0x218A392CD3D5DBF)>>58&0x3F]; - } -#endif -} - -unsigned FLAC__bitmath_silog2(FLAC__int64 v); - -#endif |