1fex_merge_flags(3M) Mathematical Library Functions fex_merge_flags(3M)
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6 fex_merge_flags - manage the floating point environment
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9 c99 [ flag... ] file... -lm [ library... ]
10 #include <fenv.h>
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12 void fex_merge_flags(const fenv_t *envp);
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16 The fex_merge_flags() function copies into the current environment
17 those exception flags that are set in the environment represented by
18 the object pointed to by envp. The argument envp must point to an
19 object set by a call to feholdexcept(3M) or fegetenv(3M) or equal to
20 the macro FE_DFL_ENV. The fex_merge_flags() function does not raise
21 any exceptions, but only sets its flags.
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24 The fex_merge_flags function does not return a value.
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27 See attributes(5) for descriptions of the following attributes:
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32 ┌───────────────────────────────────────────────────────────┐
33 │ATTRIBUTE TYPE ATTRIBUTE VALUE │
34 │Availability SUNWlibms, SUNWlmsx │
35 │Interface Stability Stable │
36 │MT-Level MT-Safe │
37 └───────────────────────────────────────────────────────────┘
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40 feclearexcept(3M), fegetenv(3M), fesetround(3M), fesetprec(3M),
41 fex_set_handling(3M), fex_set_log(3M), attributes(5)
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44 Numerical Computation Guide
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47 In a multithreaded program, the fex_merge_flags() function affects the
48 floating point environment only for the calling thread.
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51 The fex_merge_flags() function automatically installs and deinstalls
52 SIGFPE handlers and sets and clears the trap enable mode bits in the
53 floating point status register as needed. If a program uses these
54 functions and attempts to install a SIGFPE handler or control the trap
55 enable mode bits independently, the resulting behavior is not defined.
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59SunOS 5.11 12 Jul 2006 fex_merge_flags(3M)