forked from 0ad/0ad
janwas
a35ee9894d
- required adding C99 insnan() implementation, along with fpclassify This was SVN commit r3850.
94 lines
1.7 KiB
C++
94 lines
1.7 KiB
C++
/**
|
|
* =========================================================================
|
|
* File : sysdep.cpp
|
|
* Project : 0 A.D.
|
|
* Description : various system-specific function implementations
|
|
*
|
|
* @author Jan.Wassenberg@stud.uni-karlsruhe.de
|
|
* =========================================================================
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2003-2005 Jan Wassenberg
|
|
*
|
|
* Redistribution and/or modification are also permitted under the
|
|
* terms of the GNU General Public License as published by the
|
|
* Free Software Foundation (version 2 or later, at your option).
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
#include "precompiled.h"
|
|
|
|
#include "sysdep.h"
|
|
|
|
|
|
// emulate C99 functionality
|
|
#if !HAVE_C99
|
|
|
|
// fallback versions in case ia32 optimized versions are unavailable.
|
|
#if !HAVE_MS_ASM
|
|
|
|
inline float rintf(float f)
|
|
{
|
|
return (float)(int)f;
|
|
}
|
|
|
|
inline double rint(double d)
|
|
{
|
|
return (double)(int)d;
|
|
}
|
|
|
|
float fminf(float a, float b)
|
|
{
|
|
return (a < b)? a : b;
|
|
}
|
|
|
|
float fmaxf(float a, float b)
|
|
{
|
|
return (a > b)? a : b;
|
|
}
|
|
|
|
uint fpclassify(double d)
|
|
{
|
|
// really sucky stub implementation; doesn't attempt to cover all cases.
|
|
|
|
if(d != d)
|
|
return IA32_FP_NAN;
|
|
else
|
|
return IA32_FP_NORMAL;
|
|
}
|
|
|
|
uint fpclassifyf(float f)
|
|
{
|
|
return fpclassify((double)f);
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif // #if !HAVE_C99
|
|
|
|
|
|
// float->int conversion: not using the ia32 version; just implement as a
|
|
// cast. (see USE_IA32_FLOAT_TO_INT definition for details)
|
|
#if !USE_IA32_FLOAT_TO_INT
|
|
|
|
i32 i32_from_float(float f)
|
|
{
|
|
return (i32)f;
|
|
}
|
|
|
|
i32 i32_from_double(double d)
|
|
{
|
|
return (i32)d;
|
|
}
|
|
|
|
i64 i64_from_double(double d)
|
|
{
|
|
return (i64)d;
|
|
}
|
|
|
|
#endif
|