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Explain some of the reasons that fpsetprec() is unlikely to work as

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one might expect.  (These functions have already been deprecated for
many years.)

PR:		133583
This commit is contained in:
David Schultz 2010-12-03 07:01:07 +00:00
parent 6f1a8765be
commit 549f28a438
1 changed files with 5 additions and 1 deletions
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6
share/man/man3/fpgetround.3
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@ -32,7 +32,7 @@
.\" @(#)fpgetround.3 1.0 (Berkeley) 9/23/93
.\" $FreeBSD$
.\"
.Dd August 23, 1993
.Dd December 3, 2010
.Dt FPGETROUND 3
.Os
.Sh NAME
@ -164,6 +164,10 @@ and
.Fn fpsetprec
functions provide functionality unavailable on many platforms.
At present, they are implemented only on the i386 and amd64 platforms.
Changing precision isn't a supported feature:
it may be ineffective when code is compiled to take advantage of SSE,
and many library functions and compiler optimizations depend upon the
default precision for correct behavior.
.Sh SEE ALSO
.Xr fenv 3 ,
.Xr isnan 3