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authorPaul E. Murphy <murphyp@linux.vnet.ibm.com>2016-08-09 16:48:54 -0500
committerGabriel F. T. Gomes <gftg@linux.vnet.ibm.com>2017-06-26 15:04:47 -0300
commitf819dbea0a58270293c49b514b64848c6e84fda1 (patch)
tree8445824e54752726301e6d4c8d906bd3273451d0 /sysdeps/powerpc/bits
parenta27d2c19355a15569dfcdd5da741b57acf1a106a (diff)
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powerpc64le: Enable float128
This patch adds ULPs for the float128 type, updates the abilist for libc and libm, and adds the files bits/floatn.h and float128-abi.h, in order to enable the new type for powerpc64le. This patch also adds the implementation of sqrtf128 for powerpc64le, since it is not implemented in libgcc. The sfp-machine.h header is taken from libgcc. Tested for powerpc64le (GCC 6.2 and GCC 7.1), powerpc64 and s390x. * manual/math.texi (Mathematics): Mention the enabling of float128 for powerpc64le. * sysdeps/powerpc/bits/floatn.h: New file. * sysdeps/powerpc/fpu/libm-test-ulps: Regenerated. * sysdeps/powerpc/fpu/math_private.h: (__ieee754_sqrtf128): New inline override. * sysdeps/powerpc/powerpc64le/Implies-before: New file. * sysdeps/powerpc/powerpc64le/Makefile: New file. * sysdeps/powerpc/powerpc64le/fpu/e_sqrtf128.c: New file. * sysdeps/powerpc/powerpc64le/fpu/sfp-machine.h: New file. * sysdeps/powerpc/powerpc64le/power9/fpu/e_sqrtf128.c: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist: Updated. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64le/float128-abi.h: New file.
Diffstat (limited to 'sysdeps/powerpc/bits')
-rw-r--r--sysdeps/powerpc/bits/floatn.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/sysdeps/powerpc/bits/floatn.h b/sysdeps/powerpc/bits/floatn.h
new file mode 100644
index 0000000000..be57e7015f
--- /dev/null
+++ b/sysdeps/powerpc/bits/floatn.h
@@ -0,0 +1,92 @@
+/* Macros to control TS 18661-3 glibc features on powerpc.
+ 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>
+
+/* 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. */
+#if defined _ARCH_PWR8 && defined __LITTLE_ENDIAN__ && (_CALL_ELF == 2) \
+ && defined __FLOAT128__
+# define __HAVE_FLOAT128 1
+#else
+# 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. */
+#if __HAVE_FLOAT128
+# define __HAVE_DISTINCT_FLOAT128 1
+#else
+# define __HAVE_DISTINCT_FLOAT128 0
+#endif
+
+/* 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) exist for powerpc only since GCC 7.0. */
+# define __f128(x) x##q
+# 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
+/* Add a typedef for older GCC compilers which don't natively support
+ _Complex _Float128. */
+typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__KC__)));
+# define __CFLOAT128 __cfloat128
+# else
+# define __CFLOAT128 _Complex _Float128
+# endif
+#endif
+
+/* The remaining of this file provides support for older compilers. */
+#if __HAVE_FLOAT128
+
+/* The type _Float128 exist for powerpc only since GCC 7.0. */
+# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+typedef __float128 _Float128;
+# endif
+
+/* Builtin __builtin_huge_valf128 doesn't exist before GCC 7.0. */
+# if !__GNUC_PREREQ (7, 0)
+# define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
+# endif
+
+/* The following builtins (suffixed with 'q') are available in GCC >= 6.2,
+ which is the minimum version required for float128 support on powerpc64le.
+ Since GCC 7.0 the builtins suffixed with f128 are also available, then
+ there is no need to redefined them. */
+# if !__GNUC_PREREQ (7, 0)
+# define __builtin_copysignf128 __builtin_copysignq
+# define __builtin_fabsf128 __builtin_fabsq
+# define __builtin_inff128 __builtin_infq
+# define __builtin_nanf128 __builtin_nanq
+# define __builtin_nansf128 __builtin_nansq
+# endif
+
+#endif
+
+#endif /* _BITS_FLOATN_H */