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/e_acosl.c b/sysdeps/ieee754/ldbl-128/e_acosl.c
index 8c8ec93339..a89a9530af 100644
--- a/sysdeps/ieee754/ldbl-128/e_acosl.c
+++ b/sysdeps/ieee754/ldbl-128/e_acosl.c
@@ -57,7 +57,7 @@
 #include <math.h>
 #include <math_private.h>
 
-static const long double
+static const _Float128
   one = 1.0L,
   pio2_hi = 1.5707963267948966192313216916397514420986L,
   pio2_lo = 4.3359050650618905123985220130216759843812E-35L,
@@ -148,10 +148,10 @@ static const long double
   qS8 = -4.175375777334867025769346564600396877176E1L;
   /* 1.000000000000000000000000000000000000000E0 */
 
-long double
-__ieee754_acosl (long double x)
+_Float128
+__ieee754_acosl (_Float128 x)
 {
-  long double z, r, w, p, q, s, t, f2;
+  _Float128 z, r, w, p, q, s, t, f2;
   int32_t ix, sign;
   ieee854_long_double_shape_type u;