summaryrefslogtreecommitdiff
path: root/graphics/asymptote/fpu.h
blob: 7ca8df0c344481c318c02de7ba261d5d09b85638 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
#ifndef FPU_H
#define FPU_H

#ifdef __GNU_VISIBLE
#undef __GNU_VISIBLE
#define __GNU_VISIBLE 1
#endif

#include "common.h"

#ifdef HAVE_FEENABLEEXCEPT
#include <fenv.h>

inline int fpu_exceptions() {
  int excepts=0;
#ifdef FE_INVALID
  excepts |= FE_INVALID;
#endif
#ifdef FE_DIVBYZERO
  excepts |= FE_DIVBYZERO;
#endif
#ifdef FE_OVERFLOW
  excepts |= FE_OVERFLOW;
#endif
  return excepts;
}

inline void fpu_trap(bool trap=true)
{
  // Conditionally trap FPU exceptions on NaN, zero divide and overflow.
  if(trap) feenableexcept(fpu_exceptions());
  else fedisableexcept(fpu_exceptions());
}

#else

inline void fpu_trap(bool=true) {}

#endif

#endif