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Adjust __MATH_EVAL_FMT2 definition to handle _Float16 better.

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Continuing the preparation for additional _FloatN / _FloatNx type
support, this patch adds an additional case in the definition of
__MATH_EVAL_FMT2, as used in defining iseqsig: when
__FLT_EVAL_METHOD__ is 0 or 32, it adds 0.0f to the arguments, so that
the correct function would be selected in the case of _Float16
arguments with excess precision (were glibc to support _Float16, which
of course __MATH_TG and other facilities do not at present - and
_Float16 support is not part of what this patch series is aiming for,
but this particular fix is simple so is included anyway).

Tested for x86_64.

	* math/math.h
	[__FLT_EVAL_METHOD__ == 0 || __FLT_EVAL_METHOD__ == 32]
	(__MATH_EVAL_FMT2): Define to add 0.0f.
This commit is contained in:
Joseph Myers 2017-10-31 16:01:51 +00:00
parent 58af72b4e2
commit 540af6e2f1
2 changed files with 8 additions and 0 deletions
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ChangeLog
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@ -1,3 +1,9 @@
2017-10-31 Joseph Myers <joseph@codesourcery.com>
* math/math.h
[__FLT_EVAL_METHOD__ == 0 || __FLT_EVAL_METHOD__ == 32]
(__MATH_EVAL_FMT2): Define to add 0.0f.
2017-10-31 Alan Modra <amodra@gmail.com>
* sysdeps/powerpc/powerpc64/fpu/multiarch/e_expf-power8.S: Don't

2
math/math.h
View File

@ -1144,6 +1144,8 @@ iszero (__T __val)
# define __MATH_EVAL_FMT2(x, y) ((x) + (y) + 0.0L)
# elif __FLT_EVAL_METHOD__ == 1 || __FLT_EVAL_METHOD__ > 32
# define __MATH_EVAL_FMT2(x, y) ((x) + (y) + 0.0)
# elif __FLT_EVAL_METHOD__ == 0 || __FLT_EVAL_METHOD__ == 32
# define __MATH_EVAL_FMT2(x, y) ((x) + (y) + 0.0f)
# else
# define __MATH_EVAL_FMT2(x, y) ((x) + (y))
# endif