CVS commit: [netbsd-9] src/lib/libc/compat/gen

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Mon May 25 15:26:05 UTC 2020

Modified Files:
        src/lib/libc/compat/gen [netbsd-9]: compat_ldexp_ieee754.c

Log Message:
Pull up following revision(s) (requested by riastradh in ticket #920):

        lib/libc/compat/gen/compat_ldexp_ieee754.c: revision 1.8

Teach libc's compat ldexp stub to raise fp exceptions.

This ldexp stub will shadow the ldexp weak alias for scalbn in libm,
which is unfortunate but hard to fix properly without chasing the
mythical libc bump beast.  With the change here, we should raise all
the same exceptions that libm's scalbn does -- overflow, underflow,
inexact-result, and (for signalling NaN only) invalid-operation.

This in turn should correct the missing overflow/underflow exceptions
of our portable C fma, and perhaps other routines.

XXX pullup


To generate a diff of this commit:
cvs rdiff -u -r1.7 -r1.7.16.1 src/lib/libc/compat/gen/compat_ldexp_ieee754.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.