You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35 lines
701 B
C
35 lines
701 B
C
3 years ago
|
#ifndef wren_math_h
|
||
|
|
#define wren_math_h
|
||
|
|
|
||
|
|
#include <math.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
// A union to let us reinterpret a double as raw bits and back.
|
||
|
|
typedef union
|
||
|
|
{
|
||
|
|
uint64_t bits64;
|
||
|
|
uint32_t bits32[2];
|
||
|
|
double num;
|
||
|
|
} WrenDoubleBits;
|
||
|
|
|
||
|
|
#define WREN_DOUBLE_QNAN_POS_MIN_BITS (UINT64_C(0x7FF8000000000000))
|
||
|
|
#define WREN_DOUBLE_QNAN_POS_MAX_BITS (UINT64_C(0x7FFFFFFFFFFFFFFF))
|
||
|
|
|
||
|
|
#define WREN_DOUBLE_NAN (wrenDoubleFromBits(WREN_DOUBLE_QNAN_POS_MIN_BITS))
|
||
|
|
|
||
|
|
static inline double wrenDoubleFromBits(uint64_t bits)
|
||
|
|
{
|
||
|
|
WrenDoubleBits data;
|
||
|
|
data.bits64 = bits;
|
||
|
|
return data.num;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline uint64_t wrenDoubleToBits(double num)
|
||
|
|
{
|
||
|
|
WrenDoubleBits data;
|
||
|
|
data.num = num;
|
||
|
|
return data.bits64;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|