orca/cstdlib/include/math.h

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#ifndef _MATH_H
#define _MATH_H
#ifdef __cplusplus
extern "C" {
#endif
// NOTE(orca): not doing anything fancy for float_t and double_t
typedef float float_t;
typedef double double_t;
#define NAN __builtin_nanf("")
#define INFINITY __builtin_inff()
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#define FP_NAN 0
#define FP_INFINITE 1
#define FP_ZERO 2
#define FP_SUBNORMAL 3
#define FP_NORMAL 4
int __fpclassify(double);
int __fpclassifyf(float);
int __fpclassifyl(long double);
static __inline unsigned __FLOAT_BITS(float __f)
{
union {float __f; unsigned __i;} __u;
__u.__f = __f;
return __u.__i;
}
static __inline unsigned long long __DOUBLE_BITS(double __f)
{
union {double __f; unsigned long long __i;} __u;
__u.__f = __f;
return __u.__i;
}
#define fpclassify(x) ( \
sizeof(x) == sizeof(float) ? __fpclassifyf(x) : \
sizeof(x) == sizeof(double) ? __fpclassify(x) : \
__fpclassifyl(x) )
#define isinf(x) ( \
sizeof(x) == sizeof(float) ? (__FLOAT_BITS(x) & 0x7fffffff) == 0x7f800000 : \
sizeof(x) == sizeof(double) ? (__DOUBLE_BITS(x) & -1ULL>>1) == 0x7ffULL<<52 : \
__fpclassifyl(x) == FP_INFINITE)
#define isnan(x) ( \
sizeof(x) == sizeof(float) ? (__FLOAT_BITS(x) & 0x7fffffff) > 0x7f800000 : \
sizeof(x) == sizeof(double) ? (__DOUBLE_BITS(x) & -1ULL>>1) > 0x7ffULL<<52 : \
__fpclassifyl(x) == FP_NAN)
double acos(double);
double ceil(double);
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double cos(double);
float cosf(float);
double fabs(double);
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double floor(double);
double fmod(double, double);
double pow(double, double);
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double scalbn(double, int);
double sin(double);
float sinf(float);
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double sqrt(double);
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float sqrtf(float);
#define M_E 2.7182818284590452354 /* e */
#define M_LOG2E 1.4426950408889634074 /* log_2 e */
#define M_LOG10E 0.43429448190325182765 /* log_10 e */
#define M_LN2 0.69314718055994530942 /* log_e 2 */
#define M_LN10 2.30258509299404568402 /* log_e 10 */
#define M_PI 3.14159265358979323846 /* pi */
#define M_PI_2 1.57079632679489661923 /* pi/2 */
#define M_PI_4 0.78539816339744830962 /* pi/4 */
#define M_1_PI 0.31830988618379067154 /* 1/pi */
#define M_2_PI 0.63661977236758134308 /* 2/pi */
#define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */
#define M_SQRT2 1.41421356237309504880 /* sqrt(2) */
#define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */
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#ifdef __cplusplus
}
#endif
#endif