CVS commit: src

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Sat May 11 02:07:54 UTC 2024

Modified Files:
        src/lib/libm/src: s_nexttoward.c
        src/tests/lib/libm: t_next.c

Log Message:
nexttoward(3): Fix high-word test on small positive subnormals.

By this point in the logic, x can't be zero, so it's either positive
or negative.

The high word hx, however, can be zero, when x is a small positive
subnormal.  This means x is a small positive subnormal, so if x > y
we are computing nextDown, and if x < y we are computing nextUp.

hx is a (signed 32-bit) integer, not a double floating-point number,
so it's a little silly to compare hx > 0.0.  But that on its own
isn't enough to trigger the bug because all signed 32-bit integers
can be represented by double on all NetBSD architectures.

PR lib/58236


To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/lib/libm/src/s_nexttoward.c
cvs rdiff -u -r1.5 -r1.6 src/tests/lib/libm/t_next.c

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