blob: 9236448978057c3934259a6809f9fa6e569e46f4 (
plain) (
blame)
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
42
43
44
45
46
47
48
|
#ifndef _MATH_PRIVATE_H
#include <fenv.h>
#include <fpu_control.h>
#define math_opt_barrier(x) \
({ __typeof (x) __x; \
__asm ("" : "=t" (__x) : "0" (x)); \
__x; })
#define math_force_eval(x) \
do \
{ \
__typeof (x) __x = (x); \
if (sizeof (x) <= sizeof (double)) \
__asm __volatile ("" : : "m" (__x)); \
else \
__asm __volatile ("" : : "f" (__x)); \
} \
while (0)
static __always_inline void
libc_feholdexcept_setround_53bit (fenv_t *e, int r)
{
feholdexcept (e);
fesetround (r);
fpu_control_t cw;
_FPU_GETCW (cw);
cw &= ~(fpu_control_t) _FPU_EXTENDED;
cw |= _FPU_DOUBLE;
_FPU_SETCW (cw);
}
#define libc_feholdexcept_setround_53bit libc_feholdexcept_setround_53bit
static __always_inline void
libc_feupdateenv_53bit (fenv_t *e)
{
feupdateenv (e);
/* Unfortunately, feupdateenv fails to affect the rounding precision.
We can get that back by restoring the exact control word we saved. */
_FPU_SETCW (e->__control_word);
}
#define libc_feupdateenv_53bit libc_feupdateenv_53bit
#include_next <math_private.h>
#endif /* _MATH_PRIVATE_H */
|
