| 0,0 → 1,48 |
|---|
| #ifndef _FP_CONSTS_H |
| #define _FP_CONSTS_H |
| |
| /* |
| According to IEEE 754 a QNaN has exponent bits of all 1 values and |
| initial significand bit of 1. A SNaN has has an exponent of all 1 |
| values and initial significand bit of 0 (with one or more other |
| significand bits of 1). An Inf has significand of 0 and |
| exponent of all 1 values. A denormal value has all exponent bits of 0. |
| |
| The following does _not_ follow those rules, but uses values |
| equal to those exported from MS C++ runtime lib, msvcprt.dll |
| for float and double. MSVC however, does not have long doubles. |
| */ |
| |
| |
| #define __DOUBLE_INF_REP { 0, 0, 0, 0x7ff0 } |
| #define __DOUBLE_QNAN_REP { 0, 0, 0, 0xfff8 } /* { 0, 0, 0, 0x7ff8 } */ |
| #define __DOUBLE_SNAN_REP { 0, 0, 0, 0xfff0 } /* { 1, 0, 0, 0x7ff0 } */ |
| #define __DOUBLE_DENORM_REP {1, 0, 0, 0} |
| |
| #define D_NAN_MASK 0x7ff0000000000000LL /* this will mask NaN's and Inf's */ |
| |
| #define __FLOAT_INF_REP { 0, 0x7f80 } |
| #define __FLOAT_QNAN_REP { 0, 0xffc0 } /* { 0, 0x7fc0 } */ |
| #define __FLOAT_SNAN_REP { 0, 0xff80 } /* { 1, 0x7f80 } */ |
| #define __FLOAT_DENORM_REP {1,0} |
| |
| #define F_NAN_MASK 0x7f800000 |
| |
| /* |
| This assumes no implicit (hidden) bit in extended mode. |
| Padded to 96 bits |
| */ |
| #define __LONG_DOUBLE_INF_REP { 0, 0, 0, 0x8000, 0x7fff, 0 } |
| #define __LONG_DOUBLE_QNAN_REP { 0, 0, 0, 0xc000, 0xffff, 0 } |
| #define __LONG_DOUBLE_SNAN_REP { 0, 0, 0, 0x8000, 0xffff, 0 } |
| #define __LONG_DOUBLE_DENORM_REP {1, 0, 0, 0, 0, 0} |
| |
| union _ieee_rep |
| { |
| unsigned short rep[6]; |
| float float_val; |
| double double_val; |
| long double ldouble_val; |
| } ; |
| |
| #endif |