* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
- * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
- * by the XIPHOPHORUS Company http://www.xiph.org/ *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: #ifdef jail to whip a few platforms into the UNIX ideal.
- last mod: $Id: os.h,v 1.27 2001/08/13 01:36:57 xiphmont Exp $
+ last mod: $Id$
********************************************************************/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
#include <math.h>
#include <ogg/os_types.h>
+#include "misc.h"
+
#ifndef _V_IFDEFJAIL_H_
# define _V_IFDEFJAIL_H_
# ifdef __GNUC__
-# define STIN static inline
+# define STIN static __inline__
# elif _WIN32
# define STIN static __inline
-#else
-# define STIN static
+# else
+# define STIN static
+# endif
+
+#ifdef DJGPP
+# define rint(x) (floor((x)+0.5f))
#endif
#ifndef M_PI
# define M_PI (3.1415926536f)
#endif
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(__SYMBIAN32__)
# include <malloc.h>
-# define rint(x) (floor((x)+0.5f))
+# define rint(x) (floor((x)+0.5f))
# define NO_FLOAT_MATH_LIB
# define FAST_HYPOT(a, b) sqrt((a)*(a) + (b)*(b))
#endif
-#ifdef HAVE_SQRTF
-# define sqrt sqrtf
-#endif
-#ifdef HAVE_LOGF
-# define log logf
-#endif
-#ifdef HAVE_EXPF
-# define exp expf
-#endif
-#ifdef HAVE_ACOSF
-# define acos acosf
-#endif
-#ifdef HAVE_ATANF
-# define atan atanf
-#endif
-#ifdef HAVE_FREXPF
-# define frexp frexpf
-#endif
-#ifdef HAVE_RINTF
-# define rint rintf
+#if defined(__SYMBIAN32__) && defined(__WINS__)
+void *_alloca(size_t size);
+# define alloca _alloca
#endif
#ifndef FAST_HYPOT
# define max(x,y) ((x)<(y)?(y):(x))
#endif
+
+/* Special i386 GCC implementation */
#if defined(__i386__) && defined(__GNUC__) && !defined(__BEOS__)
# define VORBIS_FPU_CONTROL
/* both GCC and MSVC are kinda stupid about rounding/casting to int.
ogg_int16_t ret;
ogg_int16_t temp;
__asm__ __volatile__("fnstcw %0\n\t"
- "movw %0,%%dx\n\t"
- "orw $62463,%%dx\n\t"
- "movw %%dx,%1\n\t"
- "fldcw %1\n\t":"=m"(ret):"m"(temp): "dx");
+ "movw %0,%%dx\n\t"
+ "andw $62463,%%dx\n\t"
+ "movw %%dx,%1\n\t"
+ "fldcw %1\n\t":"=m"(ret):"m"(temp): "dx");
*fpu=ret;
}
__asm__("fistl %0": "=m"(i) : "t"(f));
return(i);
}
-#endif
+#endif /* Special i386 GCC implementation */
-#if defined(_WIN32) && !defined(__GNUC__)
+/* MSVC inline assembly. 32 bit only; inline ASM isn't implemented in the
+ * 64 bit compiler */
+#if defined(_MSC_VER) && !defined(_WIN64) && !defined(_WIN32_WCE)
# define VORBIS_FPU_CONTROL
typedef ogg_int16_t vorbis_fpu_control;
static __inline int vorbis_ftoi(double f){
- int i;
- __asm{
- fld f
- fistp i
- }
- return i;
+ int i;
+ __asm{
+ fld f
+ fistp i
+ }
+ return i;
}
static __inline void vorbis_fpu_setround(vorbis_fpu_control *fpu){
static __inline void vorbis_fpu_restore(vorbis_fpu_control fpu){
}
-#endif
+#endif /* Special MSVC 32 bit implementation */
+
+/* Optimized code path for x86_64 builds. Uses SSE2 intrinsics. This can be
+ done safely because all x86_64 CPUs supports SSE2. */
+#if (defined(_MSC_VER) && defined(_WIN64)) || (defined(__GNUC__) && defined (__x86_64__))
+# define VORBIS_FPU_CONTROL
+typedef ogg_int16_t vorbis_fpu_control;
+
+#include <emmintrin.h>
+static __inline int vorbis_ftoi(double f){
+ return _mm_cvtsd_si32(_mm_load_sd(&f));
+}
+
+static __inline void vorbis_fpu_setround(vorbis_fpu_control *fpu){
+}
+
+static __inline void vorbis_fpu_restore(vorbis_fpu_control fpu){
+}
+
+#endif /* Special MSVC x64 implementation */
+
+
+/* If no special implementation was found for the current compiler / platform,
+ use the default implementation here: */
#ifndef VORBIS_FPU_CONTROL
typedef int vorbis_fpu_control;
static int vorbis_ftoi(double f){
- return (int)(f+.5);
+ /* Note: MSVC and GCC (at least on some systems) round towards zero, thus,
+ the floor() call is required to ensure correct roudning of
+ negative numbers */
+ return (int)floor(f+.5);
}
/* We don't have special code for this compiler/arch, so do it the slow way */
# define vorbis_fpu_setround(vorbis_fpu_control) {}
# define vorbis_fpu_restore(vorbis_fpu_control) {}
-#endif
+#endif /* default implementation */
#endif /* _OS_H */