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math: Do not use __builtin_fpclassify on clang 

It does not handle pseudo normal numbers.
This commit is contained in:
Adhemerval Zanella 2022-04-01 16:54:55 -03:00
parent e219048906
commit bc52945de6
1 changed files with 2 additions and 4 deletions
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6
math/math.h
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@ -924,8 +924,7 @@ enum
the __SUPPORT_SNAN__ check may be skipped for those versions. */
/* Return number of classification appropriate for X. */
# if ((__GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__) \
|| __glibc_clang_prereq (2,8)) \
# if ((__GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__)) \
&& (!defined __OPTIMIZE_SIZE__ || defined __cplusplus)
/* The check for __cplusplus allows the use of the builtin, even
when optimization for size is on. This is provided for
@ -966,8 +965,7 @@ enum
# endif
/* Return nonzero value if X is neither zero, subnormal, Inf, nor NaN. */
# if (__GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__) \
|| __glibc_clang_prereq (2,8)
# if (__GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__)
# define isnormal(x) __builtin_isnormal (x)
# else
# define isnormal(x) (fpclassify (x) == FP_NORMAL)