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Remove the last use of MappedFile and kill the code. (less code is good!) (we've found that file mapping in the context of Dolphin only causes problems and give no speed gain - Dolphin gobbles address space ferociously on its own without mapping in huge disk images). Add some math util functions.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3441 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard
2009-06-14 10:59:06 +00:00
parent 955e446e91
commit f67660cbfe
6 changed files with 908 additions and 1147 deletions
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73
Source/Core/Common/Src/MathUtil.h
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@ -20,6 +20,76 @@
#include <xmmintrin.h>
#include "Common.h"
namespace MathUtil
{
static const u64 DOUBLE_SIGN = 0x8000000000000000ULL,
DOUBLE_EXP = 0x7FF0000000000000ULL,
DOUBLE_FRAC = 0x000FFFFFFFFFFFFFULL,
DOUBLE_ZERO = 0x0000000000000000ULL,
FLOAT_SIGN = 0x80000000,
FLOAT_EXP = 0x7F800000,
FLOAT_FRAC = 0x007FFFFF,
FLOAT_ZERO = 0x00000000ULL;
union IntDouble {
double d;
u64 i;
};
union IntFloat {
float f;
u32 i;
};
inline bool IsNAN(double d)
{
IntDouble x; x.d = d;
return ( ((x.i & DOUBLE_EXP) == DOUBLE_EXP) &&
((x.i & DOUBLE_FRAC) != DOUBLE_ZERO) );
}
inline bool IsQNAN(double d)
{
IntDouble x; x.d = d;
return ( ((x.i & DOUBLE_EXP) == DOUBLE_EXP) &&
((x.i & 0x0007fffffffffffULL) == 0x000000000000000ULL) &&
((x.i & 0x000800000000000ULL) == 0x000800000000000ULL) );
}
inline bool IsSNAN(double d)
{
IntDouble x; x.d = d;
return( ((x.i & DOUBLE_EXP) == DOUBLE_EXP) &&
((x.i & DOUBLE_FRAC) != DOUBLE_ZERO) &&
((x.i & 0x0008000000000000ULL) == DOUBLE_ZERO) );
}
inline float FlushToZero(float f)
{
IntFloat x; x.f = f;
if ((x.i & FLOAT_EXP) == 0)
x.i &= FLOAT_SIGN; // turn into signed zero
return x.f;
}
inline double FlushToZeroAsFloat(double d)
{
IntDouble x; x.d = d;
if ((x.i & DOUBLE_EXP) < 0x3800000000000000ULL)
x.i &= DOUBLE_SIGN; // turn into signed zero
return x.d;
}
} // namespace MathUtil
inline float pow2f(float x) {return x * x;}
inline double pow2(double x) {return x * x;}
/*
There are two different flavors of float to int conversion:
_mm_cvtps_epi32() and _mm_cvttps_epi32(). The first rounds
@ -27,9 +97,6 @@
uses round towards zero.
*/
inline float pow2f(float x) {return x * x;}
inline double pow2(double x) {return x * x;}
void SaveSSEState();
void LoadSSEState();
void LoadDefaultSSEState();