diff options
Diffstat (limited to 'include/ruby')
| -rw-r--r-- | include/ruby/win32.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/include/ruby/win32.h b/include/ruby/win32.h index 718da1376c..a2eec0cf19 100644 --- a/include/ruby/win32.h +++ b/include/ruby/win32.h @@ -764,7 +764,7 @@ uintptr_t rb_w32_asynchronize(asynchronous_func_t func, uintptr_t self, int argc } /* extern "C" { */ #endif -#ifdef __MINGW64__ +#if defined(__MINGW64__) /* * Use powl() instead of broken pow() of x86_64-w64-mingw32. * This workaround will fix test failures in test_bignum.rb, @@ -775,6 +775,24 @@ rb_w32_pow(double x, double y) { return powl(x, y); } +#elif defined(__MINGW64_VERSION_MAJOR) +/* + * Set floating point precision for pow() of mingw-w64 x86. + * With default precision the result is not proper on WinXP. + */ +static inline double +rb_w32_pow(double x, double y) +{ + double r; + unsigned int default_control = _controlfp(0, 0); + _controlfp(_PC_64, _MCW_PC); + r = pow(x, y); + /* Restore setting */ + _controlfp(default_control, _MCW_PC); + return r; +} +#endif +#if defined(__MINGW64_VERSION_MAJOR) || defined(__MINGW64__) #define pow rb_w32_pow #endif |