| 34,10 → 34,7 |
|---|
| /* Natural log of 2 */ |
| #define _M_LN2 0.693147180559945309417 |
| |
| #if defined(__GNUC__) && \ |
| ( (__GNUC__ >= 4) || \ |
| ( (__GNUC__ >= 3) && defined(__GNUC_MINOR__) && (__GNUC_MINOR__ >= 3) ) ) |
| |
| #if __GNUC_PREREQ (3, 3) |
| /* gcc >= 3.3 implicitly defines builtins for HUGE_VALx values. */ |
| |
| # ifndef HUGE_VAL |
| 143,11 → 140,37 |
|---|
| |
| /* ISO C99 types and macros. */ |
| |
| #ifndef FLT_EVAL_METHOD |
| #define FLT_EVAL_METHOD 0 |
| /* FIXME: FLT_EVAL_METHOD should somehow be gotten from float.h (which is hard, |
| * considering that the standard says the includes it defines should not |
| * include other includes that it defines) and that value used. (This can be |
| * solved, but autoconf has a bug which makes the solution more difficult, so |
| * it has been skipped for now.) */ |
| #if !defined(FLT_EVAL_METHOD) && defined(__FLT_EVAL_METHOD__) |
| #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__ |
| #define __TMP_FLT_EVAL_METHOD |
| #endif /* FLT_EVAL_METHOD */ |
| #if defined FLT_EVAL_METHOD |
| #if FLT_EVAL_METHOD == 0 |
| typedef float float_t; |
| typedef double double_t; |
| #endif /* FLT_EVAL_METHOD */ |
| #elif FLT_EVAL_METHOD == 1 |
| typedef double float_t; |
| typedef double double_t; |
| #elif FLT_EVAL_METHOD == 2 |
| typedef long double float_t; |
| typedef long double double_t; |
| #else |
| /* Implementation-defined. Assume float_t and double_t have been |
| * defined previously for this configuration (e.g. config.h). */ |
| #endif |
| #else |
| /* Assume basic definitions. */ |
| typedef float float_t; |
| typedef double double_t; |
| #endif |
| #if defined(__TMP_FLT_EVAL_METHOD) |
| #undef FLT_EVAL_METHOD |
| #endif |
| |
| #define FP_NAN 0 |
| #define FP_INFINITE 1 |
| 355,9 → 378,6 |
|---|
| extern float erff _PARAMS((float)); |
| extern float erfcf _PARAMS((float)); |
| extern float log2f _PARAMS((float)); |
| #if !defined(__cplusplus) |
| #define log2f(x) (logf (x) / (float_t) _M_LN2) |
| #endif |
| extern float hypotf _PARAMS((float, float)); |
| #endif /* ! defined (_REENT_ONLY) */ |
| |