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Add MIPS bits/floatn.h [committed]
- From: Joseph Myers <joseph at codesourcery dot com>
- To: <libc-alpha at sourceware dot org>
- Date: Thu, 19 Oct 2017 18:00:16 +0000
- Subject: Add MIPS bits/floatn.h [committed]
- Authentication-results: sourceware.org; auth=none
This patch adds a MIPS-specific bits/floatn.h header. This header is
identical to the ldbl-128 version except for the comment at the top;
the purpose is to ensure that a 32-bit MIPS build installs a header
that is the same as in a 64-bit MIPS build and so properly shows
_Float128 support to be available for 64-bit compilations, on the
general principle of an installation for one multilib providing
headers also suitable for other multilibs.
Tested with build-many-glibcs.py. Committed.
2017-10-19 Joseph Myers <joseph@codesourcery.com>
* sysdeps/mips/ieee754/bits/floatn.h: New file.
diff --git a/sysdeps/mips/ieee754/bits/floatn.h b/sysdeps/mips/ieee754/bits/floatn.h
new file mode 100644
index 0000000..b333491
--- /dev/null
+++ b/sysdeps/mips/ieee754/bits/floatn.h
@@ -0,0 +1,80 @@
+/* Macros to control TS 18661-3 glibc features on MIPS platforms.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _BITS_FLOATN_H
+#define _BITS_FLOATN_H
+
+#include <features.h>
+#include <bits/long-double.h>
+
+/* Defined to 1 if the current compiler invocation provides a
+ floating-point type with the IEEE 754 binary128 format, and this
+ glibc includes corresponding *f128 interfaces for it. */
+#ifndef __NO_LONG_DOUBLE_MATH
+# define __HAVE_FLOAT128 1
+#else
+/* glibc does not support _Float128 for platforms where long double is
+ normally binary128 when building with long double as binary64.
+ GCC's default for supported scalar modes does not support it either
+ in that case. */
+# define __HAVE_FLOAT128 0
+#endif
+
+/* Defined to 1 if __HAVE_FLOAT128 is 1 and the type is ABI-distinct
+ from the default float, double and long double types in this glibc. */
+#define __HAVE_DISTINCT_FLOAT128 0
+
+/* Defined to concatenate the literal suffix to be used with _Float128
+ types, if __HAVE_FLOAT128 is 1. */
+#if __HAVE_FLOAT128
+# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+/* The literal suffix f128 exists only since GCC 7.0. */
+# define __f128(x) x##l
+# else
+# define __f128(x) x##f128
+# endif
+#endif
+
+/* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1. */
+#if __HAVE_FLOAT128
+# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# define __CFLOAT128 _Complex long double
+# else
+# define __CFLOAT128 _Complex _Float128
+# endif
+#endif
+
+/* The remaining of this file provides support for older compilers. */
+#if __HAVE_FLOAT128
+
+/* The type _Float128 exists only since GCC 7.0. */
+# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+typedef long double _Float128;
+# endif
+
+/* Various built-in functions do not exist before GCC 7.0. */
+# if !__GNUC_PREREQ (7, 0)
+# define __builtin_huge_valf128() (__builtin_huge_vall ())
+# define __builtin_inff128() (__builtin_infl ())
+# define __builtin_nanf128(x) (__builtin_nanl (x))
+# define __builtin_nansf128(x) (__builtin_nansl (x))
+# endif
+
+#endif
+
+#endif /* _BITS_FLOATN_H */
--
Joseph S. Myers
joseph@codesourcery.com