ref: 1d9c31d9f5f539c854aea84056d55ad47995ee48
dir: /amd64/include/ape/float.h/
#ifndef __FLOAT
#define __FLOAT
/* IEEE, default rounding */
#define FLT_ROUNDS 1
#define FLT_RADIX 2
#define FLT_DIG 6
#define FLT_EPSILON 1.19209290e-07
#define FLT_MANT_DIG 24
#define FLT_MAX 3.40282347e+38
#define FLT_MAX_10_EXP 38
#define FLT_MAX_EXP 128
#define FLT_MIN 1.17549435e-38
#define FLT_MIN_10_EXP -37
#define FLT_MIN_EXP -125
#define DBL_DIG 15
#define DBL_EPSILON 2.2204460492503131e-16
#define DBL_MANT_DIG 53
#define DBL_MAX 1.797693134862315708145e+308
#define DBL_MAX_10_EXP 308
#define DBL_MAX_EXP 1024
#define DBL_MIN 2.225073858507201383090233e-308
#define DBL_MIN_10_EXP -307
#define DBL_MIN_EXP -1021
#define LDBL_MANT_DIG DBL_MANT_DIG
#define LDBL_EPSILON DBL_EPSILON
#define LDBL_DIG DBL_DIG
#define LDBL_MIN_EXP DBL_MIN_EXP
#define LDBL_MIN DBL_MIN
#define LDBL_MIN_10_EXP DBL_MIN_10_EXP
#define LDBL_MAX_EXP DBL_MAX_EXP
#define LDBL_MAX DBL_MAX
#define LDBL_MAX_10_EXP DBL_MAX_10_EXP
typedef union FPdbleword FPdbleword;
union FPdbleword
{
double x;
struct { /* little endian */
long lo;
long hi;
};
};
#ifdef _RESEARCH_SOURCE
/* define stuff needed for floating conversion */
#define IEEE_8087 1
#define Sudden_Underflow 1
#endif
#ifdef _PLAN9_SOURCE
/* MXCSR */
/* fcr */
#define FPFTZ (1<<15) /* amd64 */
#define FPINEX (1<<12)
#define FPUNFL (1<<11)
#define FPOVFL (1<<10)
#define FPZDIV (1<<9)
#define FPDNRM (1<<8) /* amd64 */
#define FPINVAL (1<<7)
#define FPDAZ (1<<6) /* amd64 */
#define FPRNR (0<<13)
#define FPRZ (3<<13)
#define FPRPINF (2<<13)
#define FPRNINF (1<<13)
#define FPRMASK (3<<13)
#define FPPEXT 0
#define FPPSGL 0
#define FPPDBL 0
#define FPPMASK 0
/* fsr */
#define FPAINEX (1<<5)
#define FPAUNFL (1<<4)
#define FPAOVFL (1<<3)
#define FPAZDIV (1<<2)
#define FPADNRM (1<<1) /* not in plan 9 */
#define FPAINVAL (1<<0)
#endif
#endif /* __FLOAT */