-/**
- * \file imports.h
- * Standard C library function wrappers.
- *
- * This file provides wrappers for all the standard C library functions
- * like malloc(), free(), printf(), getenv(), etc.
- */
-
/*
* Mesa 3-D graphics library
- * Version: 5.1
+ * Version: 6.2
*
- * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
*/
+/**
+ * \file imports.h
+ * Standard C library function wrappers.
+ *
+ * This file provides wrappers for all the standard C library functions
+ * like malloc(), free(), printf(), getenv(), etc.
+ */
+
+
#ifndef IMPORTS_H
#define IMPORTS_H
* this macro.
* Both pointers/offsets are expressed in bytes.
*/
-#define ADD_POINTERS(A, B) ( (A) + (unsigned long) (B) )
+#define ADD_POINTERS(A, B) ( (GLubyte *) (A) + (unsigned long) (B) )
/**********************************************************************/
/*@}*/
+/**********************************************************************/
+
+
+/**
+ * Sometimes we treat GLfloats as GLints. On x86 systems, moving a float
+ * as a int (thereby using integer registers instead of FP registers) is
+ * a performance win. Typically, this can be done with ordinary casts.
+ * But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0)
+ * these casts generate warnings.
+ * The following union typedef is used to solve that.
+ */
+typedef union { GLfloat f; GLint i; } fi_type;
+
+
/**********************************************************************
* Math macros
***/
#if defined(__i386__) || defined(__386__) || defined(__sparc__) || \
defined(__s390x__) || defined(__powerpc__) || \
- ( defined(__alpha__) && ( defined(__IEEE_FLOAT) || !defined(VMS) ) )
+ defined(__amd64__) || \
+ defined(ia64) || defined(__ia64__) || \
+ defined(__hppa__) || defined(hpux) || \
+ defined(__mips) || defined(_MIPS_ARCH) || \
+ defined(__arm__) || \
+ (defined(__alpha__) && (defined(__IEEE_FLOAT) || !defined(VMS)))
#define USE_IEEE
#define IEEE_ONE 0x3f800000
#endif
#define IS_INF_OR_NAN(x) (!isfinite(x))
#elif defined(finite)
#define IS_INF_OR_NAN(x) (!finite(x))
-#elif __VMS
+#elif defined(__VMS)
#define IS_INF_OR_NAN(x) (!finite(x))
#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
#define IS_INF_OR_NAN(x) (!isfinite(x))
*** IS_NEGATIVE: test if float is negative
***/
#if defined(USE_IEEE)
-#define GET_FLOAT_BITS(x) ((fi_type *) &(x))->i
-#define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) & (1<<31))
+static INLINE int GET_FLOAT_BITS( float x )
+{
+ fi_type fi;
+ fi.f = x;
+ return fi.i;
+}
+#define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) < 0)
#else
#define IS_NEGATIVE(x) (x < 0.0F)
#endif
return r;
}
#define IROUND(x) iround(x)
-#elif defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
+#elif defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__) && \
+ (!defined(__BEOS__) || (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)))
static INLINE int iround(float f)
{
int r;
return r;
}
#define IROUND(x) iround(x)
-#elif defined(USE_X86_ASM) && defined(__WATCOMC__)
+#elif defined(__WATCOMC__) && defined(__386__)
long iround(float f);
-#pragma aux iround = \
+#pragma aux iround = \
"push eax" \
"fistp dword ptr [esp]" \
"pop eax" \
value [eax] \
modify exact [eax];
#define IROUND(x) iround(x)
-#elif defined(__OS2__)
-#ifndef FIST_MAGIC
-#define FIST_MAGIC ((((65536.0 * 65536.0 * 16)+(65536.0 * 0.5))* 65536.0))
-#endif
-static INLINE int iround(float x)
-{
- double dtemp = FIST_MAGIC + x;
- return ((*(int *)&dtemp) - 0x80000000);
-}
-#define IROUND(f) iround((float)f)
#else
#define IROUND(f) ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
#endif
/***
- *** UNCLAMPED_FLOAT_TO_UBYTE: map float from {0,1} to ubyte in [0,255]
- *** CLAMPED_FLOAT_TO_UBYTE: map float in [0,1] to ubyte in [0,255]
+ *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255]
+ *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255]
***/
#if defined(USE_IEEE) && !defined(DEBUG)
#define IEEE_0996 0x3f7f0000 /* 0.996 or so */
do { \
fi_type __tmp; \
__tmp.f = (F); \
- UB = ((__tmp.i >= IEEE_0996) \
- ? ((GLint)__tmp.i < 0) ? (GLubyte)0 : (GLubyte)255 \
- : (__tmp.f = __tmp.f*(255.0F/256.0F) + 32768.0F, \
- (GLubyte)__tmp.i)); \
+ if (__tmp.i < 0) \
+ UB = (GLubyte) 0; \
+ else if (__tmp.i >= IEEE_0996) \
+ UB = (GLubyte) 255; \
+ else { \
+ __tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F; \
+ UB = (GLubyte) __tmp.i; \
+ } \
+ } while (0)
+#define CLAMPED_FLOAT_TO_UBYTE(UB, F) \
+ do { \
+ fi_type __tmp; \
+ __tmp.f = (F) * (255.0F/256.0F) + 32768.0F; \
+ UB = (GLubyte) __tmp.i; \
} while (0)
-#define CLAMPED_FLOAT_TO_UBYTE(ub, f) \
- UNCLAMPED_FLOAT_TO_UBYTE(ub, f)
#else
#define UNCLAMPED_FLOAT_TO_UBYTE(ub, f) \
ub = ((GLubyte) IROUND(CLAMP((f), 0.0F, 1.0F) * 255.0F))
/***
- *** COPY_FLOAT: copy a float from src to dest, avoid slow FP regs if possible
+ *** COPY_FLOAT: copy a float from src to dest.
***/
-#if defined(USE_IEEE) && !defined(DEBUG)
-#define COPY_FLOAT( dst, src ) \
- ((fi_type *) &(dst))->i = ((fi_type *) &(src))->i
-#else
#define COPY_FLOAT( dst, src ) (dst) = (src)
-#endif
/***
#pragma aux _watcom_start_fast_math = \
"fnstcw word ptr [eax]" \
"fldcw word ptr [ecx]" \
- parm [eax ecx] \
+ parm [eax] [ecx] \
modify exact [];
void _watcom_end_fast_math(unsigned short *x);
#pragma aux _watcom_end_fast_math = \
#if defined(NO_FAST_MATH)
#define START_FAST_MATH(x) \
do { \
- static GLushort mask = DEFAULT_X86_FPU; \
+ static GLushort mask = DEFAULT_X86_FPU; \
_watcom_start_fast_math(&x,&mask); \
} while (0)
#else
extern unsigned int
_mesa_bitcount(unsigned int n);
+extern GLhalfARB
+_mesa_float_to_half(float f);
+
+extern float
+_mesa_half_to_float(GLhalfARB h);
+
extern char *
_mesa_getenv( const char *var );
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