Date: Thu, 14 Nov 2002 09:06:01 -0800 (PST) From: Robert Drehmel <robert@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/lib/libc/stdlib strtod.c Message-ID: <200211141706.gAEH61aK069351@repoman.freebsd.org>
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robert 2002/11/14 09:06:01 PST
Modified files:
lib/libc/stdlib strtod.c
Log:
Define `Sudden_Underflow' when compiling for the Alpha
architecture, mainly to avoid getting a SIGFPE signal sent
when calling strtod(3) with certain input.
The SIGFPE has been sent because the code was not aware that
a Gradual Underflow is handled in software via traps on the
Alpha architecture, but is not implemented in our Alpha kernel
layer.
With `Sudden_Underflow' defined, strtod(3) should not depend
on Gradual Underflow and adjust its calculations accordingly,
which means that other, more subtle errors than the sending of
SIGFPE could be solved by this.
Discussed with: bde
PR: alpha/12623
PR: alpha/17032
PR: alpha/43567
MFC after: 7 days
Revision Changes Path
1.25 +3 -0 src/lib/libc/stdlib/strtod.c
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