newlib-cygwin/winsup/mingw/mingwex/fegetenv.c

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#include <fenv.h>
/* 7.6.4.1
The fegetenv function stores the current floating-point environment
in the object pointed to by envp. */
int fegetenv (fenv_t * envp)
{
__asm__ ("fnstenv %0;": "=m" (*envp));
/* fnstenv sets control word to non-stop for all exceptions, so we
need to reload our env to restore the original mask. */
__asm__ ("fldenv %0" : : "m" (*envp));
return 0;
}