float128: Add strtof128, wcstof128, and related functions.

The implementations are contained with sysdeps/ieee754/float128 as
they are only built when _Float128 is enabled within libc/m.

	* include/gmp.h (__mpn_construct_float128): New declaration.
	* include/stdlib.h: Include bits/floatn.h for _Float128 tests.
	(__strtof128_l): New declaration.
	(__strtof128_nan): Likewise.
	(__wcstof128_nan): Likewise.
	(__strtof128_internal): Likewise.
	(____strtof128_l_internal): Likewise.
	* include/wchar.h: Include bits/floatn.h for _Float128 tests.
	(__wcstof128_l): New declaration.
	(__wcstof128_internal): Likewise.

	* stdlib/Makefile (bug-strtod2): Link libm too.

	* stdlib/stdlib.h (strtof128): New declaration.
	(strtof128_l): Likewise.

	* stdlib/tst-strtod-nan-locale-main.c: Updated to use
	tst-strtod.h macros to ensure float128 gets tested too.

	* stdlib/tst-strtod-round-skeleton.c (CHOOSE_f128): New macro.

	* stdlib/tst-strtod.h: Include bits/floatn.h for _Float128
	tests.
	(IF_FLOAT128): New macro.
	(GEN_TEST_STRTOD): Update to optionally include _Float128 in
	the tests.
	(STRTOD_TEST_FOREACH): Likewise.

	* sysdeps/ieee754/float128/Makefile: Insert new strtof128 and
	wcstof128 functions into libc.

	* sysdeps/ieee754/float128/Versions: Add exports for the above
	new functions.

	* sysdeps/ieee754/float128/mpn2float128.c: New file.
	* sysdeps/ieee754/float128/strtod_nan_float128.h: New file.
	* sysdeps/ieee754/float128/strtof128.c: New file.
	* sysdeps/ieee754/float128/strtof128_l.c: New file.
	* sysdeps/ieee754/float128/strtof128_nan.c: New file.
	* sysdeps/ieee754/float128/wcstof128.c: New file.
	* sysdeps/ieee754/float128/wcstof128_l.c: New file.
	* sysdeps/ieee754/float128/wcstof128_nan.c: New fike.
	* wcsmbs/Makefile: (CFLAGS-wcstof128.c): Append strtox-CFLAGS.
	(CFLAGS-wcstof128_l): Likewise.

	* wcsmbs/wchar.h: Include bits/floatn.h for _Float128 tests.
	(wcstof128): New declaration.
	(wcstof128_l): Likewise.

1 files changed, 25 insertions, 11 deletions

diff --git a/stdlib/tst-strtod.h b/stdlib/tst-strtod.h
index bf5f90138f..e23ac3f8ba 100644
--- a/stdlib/tst-strtod.h
+++ b/stdlib/tst-strtod.h
@@ -21,11 +21,24 @@
 
 #define FSTRLENMAX 128
 
+#include <bits/floatn.h>
+
+#define F128 __f128 ()
+
+/* Test strfromf128 and strtof128 on all platforms that provide them,
+   whether or not the type _Float128 is ABI-distinct from long double.  */
+#if __HAVE_FLOAT128
+# define IF_FLOAT128(x) x
+#else
+# define IF_FLOAT128(x)
+#endif
+
 /* Splat n variants of the same test for the various strtod functions.  */
-#define GEN_TEST_STRTOD_FOREACH(mfunc, ...)			 \
-    mfunc (  f,       float, strfromf, f, f, ##__VA_ARGS__)	 \
-    mfunc (  d,      double, strfromd,  ,  , ##__VA_ARGS__)	 \
-    mfunc ( ld, long double, strfroml, L, l, ##__VA_ARGS__)
+#define GEN_TEST_STRTOD_FOREACH(mfunc, ...)				      \
+  mfunc (  f,       float, strfromf, f, f, ##__VA_ARGS__)		      \
+  mfunc (  d,      double, strfromd,  ,  , ##__VA_ARGS__)		      \
+  mfunc ( ld, long double, strfroml, L, l, ##__VA_ARGS__)		      \
+  IF_FLOAT128 (mfunc (f128, _Float128, strfromf128, F128, f128, ##__VA_ARGS__))
 /* The arguments to the generated macros are:
    FSUF - Function suffix
    FTYPE - float type
@@ -36,13 +49,14 @@
 
 
 
-#define STRTOD_TEST_FOREACH(mfunc, ...)	  \
-({					  \
-   int result = 0;			  \
-   result |= mfunc ## f  (__VA_ARGS__);   \
-   result |= mfunc ## d  (__VA_ARGS__);   \
-   result |= mfunc ## ld (__VA_ARGS__);   \
-   result;				  \
+#define STRTOD_TEST_FOREACH(mfunc, ...)			\
+({							\
+   int result = 0;					\
+   result |= mfunc ## f  (__VA_ARGS__);			\
+   result |= mfunc ## d  (__VA_ARGS__);			\
+   result |= mfunc ## ld (__VA_ARGS__);			\
+   IF_FLOAT128 (result |= mfunc ## f128 (__VA_ARGS__));	\
+   result;						\
 })