Use C11 *_TRUE_MIN macros where applicable.

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.

1 files changed, 4 insertions, 3 deletions

diff --git a/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c b/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c
index bf57cb8..36a5090 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c
@@ -24,6 +24,7 @@ static char rcsid[] = "$NetBSD: $";
  *   Special cases:
  */
 
+#include <float.h>
 #include <math.h>
 #include <math_private.h>
 #include <math_ldbl_opt.h>
@@ -76,7 +77,7 @@ long double __nextafterl(long double x, long double y)
 	    }
 	    if(ihx <= 0x0360000000000000LL) {  /* x <= LDBL_MIN */
 	      u = math_opt_barrier (x);
-	      x -= __LDBL_DENORM_MIN__;
+	      x -= LDBL_TRUE_MIN;
 	      if (ihx < 0x0360000000000000LL
 		  || (hx > 0 && lx <= 0)
 		  || (hx < 0 && lx > 1)) {
@@ -115,14 +116,14 @@ long double __nextafterl(long double x, long double y)
 	    }
 	    if(ihx <= 0x0360000000000000LL) {  /* x <= LDBL_MIN */
 	      u = math_opt_barrier (x);
-	      x += __LDBL_DENORM_MIN__;
+	      x += LDBL_TRUE_MIN;
 	      if (ihx < 0x0360000000000000LL
 		  || (hx > 0 && lx < 0 && lx != 0x8000000000000001LL)
 		  || (hx < 0 && lx >= 0)) {
 		u = u * u;
 		math_force_eval (u);		/* raise underflow flag */
 	      }
-	      if (x == 0.0L)	/* handle negative __LDBL_DENORM_MIN__ case */
+	      if (x == 0.0L)	/* handle negative LDBL_TRUE_MIN case */
 		x = -0.0L;
 	      return x;
 	    }