ldbl-128: Rename 'long double' to '_Float128'

Add a layer of macro indirection for long double files
which need to be built using another typename.  Likewise,
add the L(num) macro used in a later patch to override
real constants.

These macros are only defined through the ldbl-128
math_ldbl.h header, thereby implicitly restricting
these macros to machines which back long double
with an IEEE binary128 format.

Likewise, appropriate changes are made for the few
files which indirectly include such ldbl-128 files.

These changes produce identical binaries for s390x,
aarch64, and ppc64.

1 files changed, 4 insertions, 4 deletions

diff --git a/sysdeps/ieee754/ldbl-128/s_asinhl.c b/sysdeps/ieee754/ldbl-128/s_asinhl.c
index 5f3b9f2c76..dd592cd5b3 100644
--- a/sysdeps/ieee754/ldbl-128/s_asinhl.c
+++ b/sysdeps/ieee754/ldbl-128/s_asinhl.c
@@ -33,15 +33,15 @@ static char rcsid[] = "$NetBSD: $";
 #include <math.h>
 #include <math_private.h>
 
-static const long double
+static const _Float128
   one = 1.0L,
   ln2 = 6.931471805599453094172321214581765681e-1L,
   huge = 1.0e+4900L;
 
-long double
-__asinhl (long double x)
+_Float128
+__asinhl (_Float128 x)
 {
-  long double t, w;
+  _Float128 t, w;
   int32_t ix, sign;
   ieee854_long_double_shape_type u;