src/video/math_private.h
changeset 2756 a98604b691c8
parent 2755 2a3ec308d995
child 2757 0581f49c9294
--- a/src/video/math_private.h	Mon Sep 15 05:14:11 2008 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,171 +0,0 @@
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-/*
- * from: @(#)fdlibm.h 5.1 93/09/24
- * $Id$
- */
-
-#ifndef _MATH_PRIVATE_H_
-#define _MATH_PRIVATE_H_
-
-#include "SDL_name.h"
-#include "SDL_endian.h"
-
-#define huge		really_big      /* huge is a reserved keyword in VC++ 6.0 */
-#define u_int32_t	uint32_t
-
-/* The original fdlibm code used statements like:
-	n0 = ((*(int*)&one)>>29)^1;		* index of high word *
-	ix0 = *(n0+(int*)&x);			* high word of x *
-	ix1 = *((1-n0)+(int*)&x);		* low word of x *
-   to dig two 32 bit words out of the 64 bit IEEE floating point
-   value.  That is non-ANSI, and, moreover, the gcc instruction
-   scheduler gets it wrong.  We instead use the following macros.
-   Unlike the original code, we determine the endianness at compile
-   time, not at run time; I don't see much benefit to selecting
-   endianness at run time.  */
-
-/* A union which permits us to convert between a double and two 32 bit
-   ints.  */
-
-/*
- * Math on arm is special:
- * For FPA, float words are always big-endian.
- * For VFP, floats words follow the memory system mode.
- */
-
-#if (SDL_BYTEORDER == SDL_BIG_ENDIAN) || \
-    (!defined(__VFP_FP__) && (defined(__arm__) || defined(__thumb__)))
-
-typedef union
-{
-    double value;
-    struct
-    {
-        u_int32_t msw;
-        u_int32_t lsw;
-    } parts;
-} ieee_double_shape_type;
-
-#else
-
-typedef union
-{
-    double value;
-    struct
-    {
-        u_int32_t lsw;
-        u_int32_t msw;
-    } parts;
-} ieee_double_shape_type;
-
-#endif
-
-/* Get two 32 bit ints from a double.  */
-
-#define EXTRACT_WORDS(ix0,ix1,d)				\
-do {								\
-  ieee_double_shape_type ew_u;					\
-  ew_u.value = (d);						\
-  (ix0) = ew_u.parts.msw;					\
-  (ix1) = ew_u.parts.lsw;					\
-} while (0)
-
-/* Get the more significant 32 bit int from a double.  */
-
-#define GET_HIGH_WORD(i,d)					\
-do {								\
-  ieee_double_shape_type gh_u;					\
-  gh_u.value = (d);						\
-  (i) = gh_u.parts.msw;						\
-} while (0)
-
-/* Get the less significant 32 bit int from a double.  */
-
-#define GET_LOW_WORD(i,d)					\
-do {								\
-  ieee_double_shape_type gl_u;					\
-  gl_u.value = (d);						\
-  (i) = gl_u.parts.lsw;						\
-} while (0)
-
-/* Set a double from two 32 bit ints.  */
-
-#define INSERT_WORDS(d,ix0,ix1)					\
-do {								\
-  ieee_double_shape_type iw_u;					\
-  iw_u.parts.msw = (ix0);					\
-  iw_u.parts.lsw = (ix1);					\
-  (d) = iw_u.value;						\
-} while (0)
-
-/* Set the more significant 32 bits of a double from an int.  */
-
-#define SET_HIGH_WORD(d,v)					\
-do {								\
-  ieee_double_shape_type sh_u;					\
-  sh_u.value = (d);						\
-  sh_u.parts.msw = (v);						\
-  (d) = sh_u.value;						\
-} while (0)
-
-/* Set the less significant 32 bits of a double from an int.  */
-
-#define SET_LOW_WORD(d,v)					\
-do {								\
-  ieee_double_shape_type sl_u;					\
-  sl_u.value = (d);						\
-  sl_u.parts.lsw = (v);						\
-  (d) = sl_u.value;						\
-} while (0)
-
-/* A union which permits us to convert between a float and a 32 bit
-   int.  */
-
-typedef union
-{
-    float value;
-    u_int32_t word;
-} ieee_float_shape_type;
-
-/* Get a 32 bit int from a float.  */
-
-#define GET_FLOAT_WORD(i,d)					\
-do {								\
-  ieee_float_shape_type gf_u;					\
-  gf_u.value = (d);						\
-  (i) = gf_u.word;						\
-} while (0)
-
-/* Set a float from a 32 bit int.  */
-
-#define SET_FLOAT_WORD(d,i)					\
-do {								\
-  ieee_float_shape_type sf_u;					\
-  sf_u.word = (i);						\
-  (d) = sf_u.value;						\
-} while (0)
-
-
-#ifdef __STDC__
-static const double
-#else
-static double
-#endif
-  zero = 0.0, one = 1.0, two = 2.0, two53 = 9007199254740992.0, /* 0x43400000, 0x00000000 */
-    two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */
-    twom54 = 5.55111512312578270212e-17,        /* 0x3C900000, 0x00000000 */
-    huge = 1.0e+300, tiny = 1.0e-300;
-
-#endif /* _MATH_PRIVATE_H_ */
-
-/* vi: set ts=4 sw=4 expandtab: */