Follow-up commit d180086e6e by fixing 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.
PR: 288850
MFC after: 1 week
c58c77246f