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Use C11 *_TRUE_MIN macros where applicable.

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C11 defines standard <float.h> macros *_TRUE_MIN for the least
positive subnormal value of a type.  Now that we build with
-std=gnu11, we can use these macros in glibc.  This patch replaces
previous uses of the GCC predefines __*_DENORM_MIN__ (used in
<float.h> to define *_TRUE_MIN), as well as *_DENORM_MIN references in
comments.

Tested for x86_64 and x86 (testsuite, and that installed shared
libraries are unchanged by the patch).  Also tested for powerpc that
installed stripped shared libraries are unchanged by the patch.

	* math/libm-test.inc (min_subnorm_value): Use LDBL_TRUE_MIN,
	DBL_TRUE_MIN and FLT_TRUE_MIN instead of __LDBL_DENORM_MIN__,
	__DBL_DENORM_MIN__ and __FLT_DENORM_MIN__.
	* sysdeps/ieee754/dbl-64/s_fma.c (__fma): Refer to DBL_TRUE_MIN
	instead of DBL_DENORM_MIN in comment.
	* sysdeps/ieee754/ldbl-128/s_fmal.c (__fmal): Refer to
	LDBL_TRUE_MIN instead of LDBL_DENORM_MIN in comment.
	* sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c: Include <float.h>.
	(__nextafterl): Use LDBL_TRUE_MIN instead of __LDBL_DENORM_MIN__.
	* sysdeps/ieee754/ldbl-96/s_fmal.c (__fmal): Refer to
	LDBL_TRUE_MIN instead of LDBL_DENORM_MIN in comment.
This commit is contained in:
Joseph Myers
2015-10-28 21:42:52 +00:00
parent a62719ba90
commit 1f4dafa3ea
6 changed files with 27 additions and 12 deletions
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12
math/libm-test.inc
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@ -315,12 +315,12 @@ static int ignore_max_ulp; /* Should we ignore max_ulp? */
LDBL_MAX, DBL_MAX, FLT_MAX)
#define min_value CHOOSE (LDBL_MIN, DBL_MIN, FLT_MIN, \
LDBL_MIN, DBL_MIN, FLT_MIN)
#define min_subnorm_value CHOOSE (__LDBL_DENORM_MIN__, \
__DBL_DENORM_MIN__, \
__FLT_DENORM_MIN__, \
__LDBL_DENORM_MIN__, \
__DBL_DENORM_MIN__, \
__FLT_DENORM_MIN__)
#define min_subnorm_value CHOOSE (LDBL_TRUE_MIN, \
DBL_TRUE_MIN, \
FLT_TRUE_MIN, \
LDBL_TRUE_MIN, \
DBL_TRUE_MIN, \
FLT_TRUE_MIN)
static FLOAT max_error, real_max_error, imag_max_error;