blob: 8736faadf05b9c2505f3a5e851f2ad8aeb708d1d [file] [log] [blame]
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
#include <fenv.h>
The feholdexcept function saves the current floating-point
environment in the object pointed to by envp, clears the exception
flags, and then installs a non-stop (continue on exceptions) mode,
if available, for all exceptions. */
int feholdexcept (fenv_t * envp)
#if defined(_ARM_) || defined(__arm__)
fenv_t _env;
__asm__ volatile ("fmrx %0, FPSCR" : "=r" (_env));
envp->__cw = _env.__cw;
_env.__cw &= ~(FE_ALL_EXCEPT);
__asm__ volatile ("fmxr FPSCR, %0" : : "r" (_env));
#elif defined(_ARM64_) || defined(__aarch64__)
unsigned __int64 fpcr;
__asm__ volatile ("mrs %0, fpcr" : "=r" (fpcr));
envp->__cw = fpcr;
fpcr &= ~(FE_ALL_EXCEPT);
__asm__ volatile ("msr fpcr, %0" : : "r" (fpcr));
__asm__ __volatile__ ("fnstenv %0;" : "=m" (* envp)); /* save current into envp */
/* fnstenv sets control word to non-stop for all exceptions, so all we
need to do is clear the exception flags. */
__asm__ __volatile__ ("fnclex");
#endif /* defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__) */
return 0;