s_mathcnst.c

来自「Newlib 嵌入式 C库 标准实现代码」· C语言 代码 · 共 25 行

/* @(#)z_mathcnst.c 1.0 98/08/13 */

#include "zmath.h"
#include "fdlibm.h"

double BIGX = 7.09782712893383973096e+02;
double SMALLX = -7.45133219101941108420e+02;
double z_rooteps = 7.4505859692e-9;
float  z_rooteps_f = 1.7263349182589107e-4;

ufloat z_hugeval_f  = { 0x7f800000 };
ufloat z_infinity_f = { 0x7f800000 };
ufloat z_notanum_f  = { 0xffd00000 };

#ifdef __IEEE_BIG_ENDIAN
udouble z_hugeval  = { 0x7ff00000, 0 };
udouble z_infinity = { 0x7ff00000, 0 };
udouble z_notanum  = { 0xfff80000, 0 };
#else /* __IEEE_LITTLE_ENDIAN  */
udouble z_hugeval  = { 0, 0x7ff00000 };
udouble z_infinity = { 0, 0x7ff00000 };
udouble z_notanum  = { 0, 0xfff80000 };
#endif /* __IEEE_LITTLE_ENDIAN */