blob: ddc6af68f7b53fa8009ebbb7d296d62a0a9decb4 [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>
#include <math.h>
long double
truncl (long double _x)
{
#if defined(_ARM_) || defined(__arm__)
return trunc(_x);
#else
long double retval = 0.0L;
unsigned short saved_cw;
unsigned short tmp_cw;
__asm__ __volatile__ ("fnstcw %0;" : "=m" (saved_cw)); /* save FPU control word */
tmp_cw = (saved_cw & ~(FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO))
| FE_TOWARDZERO;
__asm__ __volatile__ ("fldcw %0;" : : "m" (tmp_cw));
__asm__ __volatile__ ("frndint;" : "=t" (retval) : "0" (_x)); /* round towards zero */
__asm__ __volatile__ ("fldcw %0;" : : "m" (saved_cw) ); /* restore saved control word */
return retval;
#endif /* defined(_ARM_) || defined(__arm__) */
}