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_tanhl.c b/sysdeps/ieee754/ldbl-128/s_tanhl.c
index f7a1d20f79..ad418c08e8 100644
--- a/sysdeps/ieee754/ldbl-128/s_tanhl.c
+++ b/sysdeps/ieee754/ldbl-128/s_tanhl.c
@@ -45,12 +45,12 @@
 #include <math.h>
 #include <math_private.h>
 
-static const long double one = 1.0, two = 2.0, tiny = 1.0e-4900L;
+static const _Float128 one = 1.0, two = 2.0, tiny = 1.0e-4900L;
 
-long double
-__tanhl (long double x)
+_Float128
+__tanhl (_Float128 x)
 {
-  long double t, z;
+  _Float128 t, z;
   u_int32_t jx, ix;
   ieee854_long_double_shape_type u;