FEX_MERGE_FLAGS(3M) Mathematical Library Functions FEX_MERGE_FLAGS(3M)
NAME
fex_merge_flags - manage the floating point environment
SYNOPSIS
c99 [
flag... ]
file... -lm [
library... ]
#include <fenv.h>
void fex_merge_flags(
const fenv_t *envp);
DESCRIPTION
The
fex_merge_flags() function copies into the current environment
those exception flags that are set in the environment represented by
the object pointed to by
envp. The argument
envp must point to an
object set by a call to
feholdexcept(3M) or
fegetenv(3M) or equal to
the macro
FE_DFL_ENV. The
fex_merge_flags() function does not raise
any exceptions, but only sets its flags.
RETURN VALUES
The
fex_merge_flags function does not return a value.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+----------------------------------------------------------+
|ATTRIBUTE TYPE ATTRIBUTE VALUE |
|Availability SUNWlibms, SUNWlmsx |
|Interface Stability Stable |
|MT-Level MT-Safe |
+----------------------------------------------------------+
SEE ALSO
feclearexcept(3M),
fegetenv(3M),
fesetprec(3M),
fesetround(3M),
fex_set_handling(3M),
fex_set_log(3M),
attributes(7) Numerical Computation GuideNOTES
In a multithreaded program, the
fex_merge_flags() function affects
the floating point environment only for the calling thread.
The
fex_merge_flags() function automatically installs and deinstalls
SIGFPE handlers and sets and clears the trap enable mode bits in the
floating point status register as needed. If a program uses these
functions and attempts to install a
SIGFPE handler or control the
trap enable mode bits independently, the resulting behavior is not
defined.
SunOS 5.11 July 12, 2006 FEX_MERGE_FLAGS(3M)
