18e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifndef _OS_H 28e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#define _OS_H 38e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels/******************************************************************** 48e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels * * 58e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * 68e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * 78e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * 88e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * 98e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels * * 108e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 * 118e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels * by the Xiph.Org Foundation http://www.xiph.org/ * 128e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels * * 138e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels ******************************************************************** 148e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 158e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels function: #ifdef jail to whip a few platforms into the UNIX ideal. 168e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels last mod: $Id: os.h 16227 2009-07-08 06:58:46Z xiphmont $ 178e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 188e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels ********************************************************************/ 198e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 208e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifdef HAVE_CONFIG_H 218e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#include "config.h" 228e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 238e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 248e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#include <math.h> 258e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#include <ogg/os_types.h> 268e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 278e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#include "misc.h" 288e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 298e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifndef _V_IFDEFJAIL_H_ 308e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define _V_IFDEFJAIL_H_ 318e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 328e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# ifdef __GNUC__ 338e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define STIN static __inline__ 348e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# elif _WIN32 358e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define STIN static __inline 368e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# else 378e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define STIN static 388e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# endif 398e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 408e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifdef DJGPP 418e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define rint(x) (floor((x)+0.5f)) 428e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 438e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 448e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifndef M_PI 458e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define M_PI (3.1415926536f) 468e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 478e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 488e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#if defined(_WIN32) && !defined(__SYMBIAN32__) 498e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# include <malloc.h> 508e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define rint(x) (floor((x)+0.5f)) 518e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define NO_FLOAT_MATH_LIB 528e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define FAST_HYPOT(a, b) sqrt((a)*(a) + (b)*(b)) 538e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 548e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 558e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#if defined(__SYMBIAN32__) && defined(__WINS__) 568e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsvoid *_alloca(size_t size); 578e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define alloca _alloca 588e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 598e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 608e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifndef FAST_HYPOT 618e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define FAST_HYPOT hypot 628e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 638e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 648e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 658e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 668e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifdef HAVE_ALLOCA_H 678e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# include <alloca.h> 688e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 698e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 708e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifdef USE_MEMORY_H 718e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# include <memory.h> 728e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 738e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 748e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifndef min 758e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define min(x,y) ((x)>(y)?(y):(x)) 768e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 778e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 788e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifndef max 798e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define max(x,y) ((x)<(y)?(y):(x)) 808e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif 818e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 828e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 838e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels/* Special i386 GCC implementation */ 848e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#if defined(__i386__) && defined(__GNUC__) && !defined(__BEOS__) 858e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define VORBIS_FPU_CONTROL 868e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels/* both GCC and MSVC are kinda stupid about rounding/casting to int. 878e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels Because of encapsulation constraints (GCC can't see inside the asm 888e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels block and so we end up doing stupid things like a store/load that 898e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels is collectively a noop), we do it this way */ 908e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 918e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels/* we must set up the fpu before this works!! */ 928e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 938e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelstypedef ogg_int16_t vorbis_fpu_control; 948e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 958e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsstatic inline void vorbis_fpu_setround(vorbis_fpu_control *fpu){ 968e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels ogg_int16_t ret; 978e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels ogg_int16_t temp; 988e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels __asm__ __volatile__("fnstcw %0\n\t" 998e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels "movw %0,%%dx\n\t" 1008e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels "andw $62463,%%dx\n\t" 1018e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels "movw %%dx,%1\n\t" 1028e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels "fldcw %1\n\t":"=m"(ret):"m"(temp): "dx"); 1038e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels *fpu=ret; 1048e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels} 1058e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1068e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsstatic inline void vorbis_fpu_restore(vorbis_fpu_control fpu){ 1078e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels __asm__ __volatile__("fldcw %0":: "m"(fpu)); 1088e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels} 1098e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1108e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels/* assumes the FPU is in round mode! */ 1118e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsstatic inline int vorbis_ftoi(double f){ /* yes, double! Otherwise, 1128e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels we get extra fst/fld to 1138e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels truncate precision */ 1148e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels int i; 1158e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels __asm__("fistl %0": "=m"(i) : "t"(f)); 1168e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels return(i); 1178e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels} 1188e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif /* Special i386 GCC implementation */ 1198e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1208e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1218e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels/* MSVC inline assembly. 32 bit only; inline ASM isn't implemented in the 1228e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels * 64 bit compiler */ 1238e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#if defined(_MSC_VER) && !defined(_WIN64) && !defined(_WIN32_WCE) 1248e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define VORBIS_FPU_CONTROL 1258e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1268e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelstypedef ogg_int16_t vorbis_fpu_control; 1278e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1288e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsstatic __inline int vorbis_ftoi(double f){ 1298e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels int i; 1308e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels __asm{ 1318e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels fld f 1328e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels fistp i 1338e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels } 1348e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels return i; 1358e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels} 1368e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1378e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsstatic __inline void vorbis_fpu_setround(vorbis_fpu_control *fpu){ 1388e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels} 1398e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1408e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsstatic __inline void vorbis_fpu_restore(vorbis_fpu_control fpu){ 1418e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels} 1428e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1438e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif /* Special MSVC 32 bit implementation */ 1448e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1458e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1468e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels/* Optimized code path for x86_64 builds. Uses SSE2 intrinsics. This can be 1478e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels done safely because all x86_64 CPUs supports SSE2. */ 1488e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#if (defined(_MSC_VER) && defined(_WIN64)) || (defined(__GNUC__) && defined (__x86_64__)) 1498e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define VORBIS_FPU_CONTROL 1508e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1518e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelstypedef ogg_int16_t vorbis_fpu_control; 1528e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1538e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#include <emmintrin.h> 1548e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsstatic __inline int vorbis_ftoi(double f){ 1558e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels return _mm_cvtsd_si32(_mm_load_sd(&f)); 1568e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels} 1578e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1588e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsstatic __inline void vorbis_fpu_setround(vorbis_fpu_control *fpu){ 1598e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels} 1608e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1618e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsstatic __inline void vorbis_fpu_restore(vorbis_fpu_control fpu){ 1628e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels} 1638e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1648e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif /* Special MSVC x64 implementation */ 1658e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1668e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1678e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels/* If no special implementation was found for the current compiler / platform, 1688e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels use the default implementation here: */ 1698e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#ifndef VORBIS_FPU_CONTROL 1708e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1718e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelstypedef int vorbis_fpu_control; 1728e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1738e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckelsstatic int vorbis_ftoi(double f){ 1748e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels /* Note: MSVC and GCC (at least on some systems) round towards zero, thus, 1758e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels the floor() call is required to ensure correct roudning of 1768e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels negative numbers */ 1778e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels return (int)floor(f+.5); 1788e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels} 1798e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1808e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels/* We don't have special code for this compiler/arch, so do it the slow way */ 1818e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define vorbis_fpu_setround(vorbis_fpu_control) {} 1828e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels# define vorbis_fpu_restore(vorbis_fpu_control) {} 1838e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1848e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif /* default implementation */ 1858e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels 1868e01cdce135d5d816f92d7bb83f9a930aa1b45aeLucas Eckels#endif /* _OS_H */ 187