forked from 0ad/0ad
janwas
eaf12ae666
big thanks to philip for seeing the problem! :D cause: not popping FPU stack. didn't happen on my athlonXP presumably due to different FPU usage (possibly in drivers): pushing 8 values could clear the stack and mask overflow. the cause was not due to compiler (and FLD/FSTP param passing) because Philip uses VC2005 as well, but saw the crash (on P4 CPU) fixes #130 This was SVN commit r4072.
94 lines
1.7 KiB
C++
94 lines
1.7 KiB
C++
/**
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* =========================================================================
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* File : sysdep.cpp
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* Project : 0 A.D.
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* Description : various system-specific function implementations
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*
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* @author Jan.Wassenberg@stud.uni-karlsruhe.de
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* =========================================================================
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*/
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/*
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* Copyright (c) 2003-2005 Jan Wassenberg
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*
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* Redistribution and/or modification are also permitted under the
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* terms of the GNU General Public License as published by the
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* Free Software Foundation (version 2 or later, at your option).
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "precompiled.h"
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#include "sysdep.h"
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// emulate C99 functionality
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#if !HAVE_C99
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// fallback versions in case ia32 optimized versions are unavailable.
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#if !HAVE_MS_ASM
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inline float rintf(float f)
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{
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return (float)(int)f;
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}
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inline double rint(double d)
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{
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return (double)(int)d;
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}
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float fminf(float a, float b)
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{
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return (a < b)? a : b;
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}
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float fmaxf(float a, float b)
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{
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return (a > b)? a : b;
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}
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uint fpclassify(double d)
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{
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// really sucky stub implementation; doesn't attempt to cover all cases.
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if(d != d)
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return FP_NAN;
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else
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return FP_NORMAL;
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}
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uint fpclassifyf(float f)
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{
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return fpclassify((double)f);
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}
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#endif
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#endif // #if !HAVE_C99
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// float->int conversion: not using the ia32 version; just implement as a
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// cast. (see USE_IA32_FLOAT_TO_INT definition for details)
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#if !USE_IA32_FLOAT_TO_INT
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i32 i32_from_float(float f)
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{
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return (i32)f;
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}
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i32 i32_from_double(double d)
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{
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return (i32)d;
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}
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i64 i64_from_double(double d)
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{
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return (i64)d;
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}
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#endif
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