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, 2 insertions, 2 deletions

diff --git a/sysdeps/ieee754/ldbl-128/s_sincosl.c b/sysdeps/ieee754/ldbl-128/s_sincosl.c
index 1abdb4419e..9130cdf2f8 100644
--- a/sysdeps/ieee754/ldbl-128/s_sincosl.c
+++ b/sysdeps/ieee754/ldbl-128/s_sincosl.c
@@ -24,7 +24,7 @@
 #include <math_private.h>
 
 void
-__sincosl (long double x, long double *sinx, long double *cosx)
+__sincosl (_Float128 x, _Float128 *sinx, _Float128 *cosx)
 {
   int64_t ix;
 
@@ -45,7 +45,7 @@ __sincosl (long double x, long double *sinx, long double *cosx)
   else
     {
       /* Argument reduction needed.  */
-      long double y[2];
+      _Float128 y[2];
       int n;
 
       n = __ieee754_rem_pio2l (x, y);