https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=288850
Bug ID: 288850
Summary: [libm] avoid left shift of signed integer entity in
ilogbf(), fmodf(), and remquof().
Product: Base System
Version: Unspecified
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
Created attachment 262944
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=262944&action=edit
avoid left shift of signed integer entities
As a followup to git revision d180086e6eae2e15, the attached patch
fixes the left shift of signed integer entities through the use
of a helper function. Specific per file changes are:
* lib/msun/src/e_fmodf.c:
* lib/msun/src/s_remquof.c:
. Eliminate now unused variable 'i'.
. Sort declaration statement.
. Use subnormal_ilogbf() to avoid left shift of signed integer.
* lib/msun/src/math_private.h b/lib/msun/src/math_private.h:
. Implement subnormal_ilogbf() to extract an exponent of a subnormal
float. This avoids left shifts of signed integers.
. Update nearby comment.
* lib/msun/src/s_ilogbf.c
. Fix declaration of the function statement in accordance with style(9).
. Use subnormal_ilogbf() to avoid left shift of signed integer.
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