16fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org/* 26fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 36fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org * 46fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org * Use of this source code is governed by a BSD-style license 56fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org * that can be found in the LICENSE file in the root of the source 66fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org * tree. An additional intellectual property rights grant can be found 76fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org * in the file PATENTS. All contributing project authors may 86fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org * be found in the AUTHORS file in the root of the source tree. 96fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org */ 10d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org 116fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org#ifndef VP9_COMMON_VP9_SYSTEMDEPENDENT_H_ 126fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org#define VP9_COMMON_VP9_SYSTEMDEPENDENT_H_ 136fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org 1476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#ifdef _MSC_VER 1593a74791c8e808ea76001ee07693aa2a5fdd3500johannkoenig@chromium.org# include <math.h> // the ceil() definition must precede intrin.h 1676e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org# if _MSC_VER > 1310 && (defined(_M_X64) || defined(_M_IX86)) 1776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org# include <intrin.h> 1876e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org# define USE_MSC_INTRIN 1976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org# endif 2076e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org# define snprintf _snprintf 21dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org#endif 22dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org 2376e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#ifdef __cplusplus 2476e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgextern "C" { 25d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org#endif 26d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org 27d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org#include "./vpx_config.h" 286fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org#if ARCH_X86 || ARCH_X86_64 296fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.orgvoid vpx_reset_mmx_state(void); 306fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org#define vp9_clear_system_state() vpx_reset_mmx_state() 316fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org#else 326fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org#define vp9_clear_system_state() 336fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org#endif 346fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org 35ecee051929d6ced19cf324688774acccc9ad4a0ajohannkoenig@chromium.org#if defined(_MSC_VER) && _MSC_VER < 1800 36ecee051929d6ced19cf324688774acccc9ad4a0ajohannkoenig@chromium.org// round is not defined in MSVC before VS2013. 3776e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.orgstatic INLINE int round(double x) { 38d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org if (x < 0) 39d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org return (int)ceil(x - 0.5); 40d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org else 41d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org return (int)floor(x + 0.5); 42d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org} 43d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org#endif 44d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org 45dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org// use GNU builtins where available. 46dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org#if defined(__GNUC__) && \ 47dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org ((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4) 48dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.orgstatic INLINE int get_msb(unsigned int n) { 49dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org return 31 ^ __builtin_clz(n); 50dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org} 5176e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#elif defined(USE_MSC_INTRIN) 52dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org#pragma intrinsic(_BitScanReverse) 53dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org 54dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.orgstatic INLINE int get_msb(unsigned int n) { 55dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org unsigned long first_set_bit; 56dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org _BitScanReverse(&first_set_bit, n); 57dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org return first_set_bit; 58dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org} 5976e516e2154f353aa02c504bac88afb0f95fefa7johannkoenig@chromium.org#undef USE_MSC_INTRIN 60dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org#else 61dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org// Returns (int)floor(log2(n)). n must be > 0. 62dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.orgstatic INLINE int get_msb(unsigned int n) { 63dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org int log = 0; 64dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org unsigned int value = n; 65dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org int i; 66dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org 67dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org for (i = 4; i >= 0; --i) { 68dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org const int shift = (1 << i); 69dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org const unsigned int x = value >> shift; 70dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org if (x != 0) { 71dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org value = x; 72dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org log += shift; 73dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org } 74dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org } 75dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org return log; 76dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org} 77dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org#endif 78dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org 79dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org#ifdef __cplusplus 80dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org} // extern "C" 81dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org#endif 82dddee1ec7cedf276305b107429f684539b105276johannkoenig@chromium.org 83d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org#endif // VP9_COMMON_VP9_SYSTEMDEPENDENT_H_ 84