6 /* Now define the internal interfaces. */
8 extern int __feclearexcept (int __excepts);
9 extern int __fegetexcept (void);
10 extern int __fegetexceptflag (fexcept_t *__flagp, int __excepts);
11 extern int __feraiseexcept (int __excepts);
12 extern int __fesetexceptflag (const fexcept_t *__flagp, int __excepts);
13 extern int __fegetenv (fenv_t *__envp);
14 extern int __fesetenv (const fenv_t *__envp);
15 extern int __feupdateenv (const fenv_t *__envp);
16 extern __typeof (fegetround) __fegetround __attribute_pure__;
17 extern __typeof (feholdexcept) __feholdexcept;
18 extern __typeof (fesetround) __fesetround;
20 libm_hidden_proto (feraiseexcept)
21 libm_hidden_proto (__feraiseexcept)
22 libm_hidden_proto (fegetenv)
23 libm_hidden_proto (__fegetenv)
24 libm_hidden_proto (fegetround)
25 libm_hidden_proto (__fegetround)
26 libm_hidden_proto (fesetenv)
27 libm_hidden_proto (__fesetenv)
28 libm_hidden_proto (fesetround)
29 libm_hidden_proto (__fesetround)
30 libm_hidden_proto (feholdexcept)
31 libm_hidden_proto (__feholdexcept)
32 libm_hidden_proto (feupdateenv)
33 libm_hidden_proto (__feupdateenv)
34 libm_hidden_proto (fetestexcept)
35 libm_hidden_proto (feclearexcept)
37 /* Rounding mode context. This allows functions to set/restore rounding mode
38 only when the desired rounding mode is different from the current rounding
46 /* Track whether rounding mode macros were defined, since
47 get-rounding-mode.h may define default versions if they weren't.
48 FE_TONEAREST must always be defined (even if no changes of rounding
49 mode are supported, glibc requires it to be defined to represent
50 the default rounding mode). */
52 # error "FE_TONEAREST not defined"
54 # if defined FE_DOWNWARD || defined FE_TOWARDZERO || defined FE_UPWARD
55 # define FE_HAVE_ROUNDING_MODES 1
57 # define FE_HAVE_ROUNDING_MODES 0
60 /* When no floating-point exceptions are defined in <fenv.h>, make
61 feraiseexcept ignore its argument so that unconditional
62 feraiseexcept calls do not cause errors for undefined exceptions.
63 Define it to expand to a void expression so that any calls testing
64 the result of feraiseexcept do produce errors. */
65 # if FE_ALL_EXCEPT == 0
66 # define feraiseexcept(excepts) ((void) 0)
67 # define __feraiseexcept(excepts) ((void) 0)
70 /* Similarly, most <fenv.h> functions have trivial implementations in
71 the absence of support for floating-point exceptions and rounding
74 # if !FE_HAVE_ROUNDING_MODES
75 # if FE_ALL_EXCEPT == 0
77 fegetenv (fenv_t *__e)
83 __fegetenv (fenv_t *__e)
89 feholdexcept (fenv_t *__e)
95 __feholdexcept (fenv_t *__e)
101 fesetenv (const fenv_t *__e)
107 __fesetenv (const fenv_t *__e)
113 feupdateenv (const fenv_t *__e)
119 __feupdateenv (const fenv_t *__e)
144 __fesetround (int __d)