1 /** 2 * This file has no copyright assigned and is placed in the Public Domain. 3 * This file is part of the mingw-w64 runtime package. 4 * No warranty is given; refer to the file DISCLAIMER.PD within this package. 5 */ 6 #include <fenv.h> 7 8 /* 7.6.3.1 9 The fegetround function returns the value of the rounding direction 10 macro representing the current rounding direction. */ 11 12 int fegetround(void)13fegetround (void) 14 { 15 #if defined(_ARM_) || defined(__arm__) 16 fenv_t _env; 17 __asm__ volatile ("fmrx %0, FPSCR" : "=r" (_env)); 18 return (_env.__cw & (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO)); 19 #elif defined(_ARM64_) || defined(__aarch64__) 20 unsigned __int64 fpcr; 21 __asm__ volatile ("mrs %0, fpcr" : "=r" (fpcr)); 22 return (fpcr & (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO)); 23 #else 24 int _control; 25 __asm__ volatile ("fnstcw %0" : "=m" (*&_control)); 26 return (_control & (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO)); 27 #endif /* defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__) */ 28 } 29