/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
- * THE GNU LESSER/LIBRARY PUBLIC LICENSE, WHICH IS INCLUDED WITH *
- * THIS SOURCE. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
+ * 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 1994-2000 *
- * by Monty <monty@xiph.org> and the XIPHOPHORUS Company *
- * http://www.xiph.org/ *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2015 *
+ * 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 1.18 2000/12/17 08:47:46 xiphmont Exp $
********************************************************************/
+#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_
+# define _V_IFDEFJAIL_H_
+
+# ifdef __GNUC__
+# define STIN static __inline__
+# elif defined(_WIN32)
+# define STIN static __inline
+# else
+# define STIN static
+# endif
+
+#ifdef DJGPP
+# define rint(x) (floor((x)+0.5f))
+#endif
#ifndef M_PI
-#define M_PI (3.14159265358979323846)
+# define M_PI (3.1415926536f)
#endif
-#ifndef __GNUC__
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(__SYMBIAN32__)
# include <malloc.h>
-# define rint(x) (floor((x)+0.5))
+# define rint(x) (floor((x)+0.5f))
+# define NO_FLOAT_MATH_LIB
+# define FAST_HYPOT(a, b) sqrt((a)*(a) + (b)*(b))
#endif
-#define STIN static
-#else
-#define STIN static inline
+#if defined(__SYMBIAN32__) && defined(__WINS__)
+void *_alloca(size_t size);
+# define alloca _alloca
#endif
-
-#ifdef _WIN32
-# define FAST_HYPOT(a, b) sqrt((a)*(a) + (b)*(b))
-#else /* if not _WIN32 */
+#ifndef FAST_HYPOT
# define FAST_HYPOT hypot
#endif
#endif
#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
#endif
#ifdef USE_MEMORY_H
-#include <memory.h>
+# include <memory.h>
#endif
#ifndef min
#endif
-#if defined(__i386__) && defined(__GNUC__)
-
-#ifndef __BEOS__
-
+/* 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.
Because of encapsulation constraints (GCC can't see inside the asm
block and so we end up doing stupid things like a store/load that
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 /* Special i386 GCC implementation */
-#else
-/* this is for beos */
-typedef int vorbis_fpu_control;
-static int vorbis_ftoi(double f){
- return (int)(f+.5);
+/* MSVC inline assembly. 32 bit only; inline ASM isn't implemented in the
+ * 64 bit compiler and doesn't work on arm. */
+#if defined(_MSC_VER) && !defined(_WIN64) && \
+ !defined(_WIN32_WCE) && !defined(_M_ARM)
+# 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;
}
-/* 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) {}
+static __inline void vorbis_fpu_setround(vorbis_fpu_control *fpu){
+ (void)fpu;
+}
-#endif
+static __inline void vorbis_fpu_restore(vorbis_fpu_control fpu){
+ (void)fpu;
+}
-#else
+#endif /* Special MSVC 32 bit implementation */
-typedef int vorbis_fpu_control;
+/* 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
-#ifdef _WIN32
+typedef ogg_int16_t vorbis_fpu_control;
+#include <emmintrin.h>
static __inline int vorbis_ftoi(double f){
- int i;
- __asm{
- fld f
- fistp i
- }
- return i;
+ return _mm_cvtsd_si32(_mm_load_sd(&f));
}
static __inline void vorbis_fpu_setround(vorbis_fpu_control *fpu){
+ (void)fpu;
}
static __inline void vorbis_fpu_restore(vorbis_fpu_control fpu){
+ (void)fpu;
}
-#else
+
+#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) {}
+# define vorbis_fpu_setround(vorbis_fpu_control) {}
+# define vorbis_fpu_restore(vorbis_fpu_control) {}
-#endif
-
-#endif
+#endif /* default implementation */
#endif /* _OS_H */
projects / platform / upstream / libvorbis.git / blobdiff