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authorRichard Henderson <rth@twiddle.net>2012-09-13 07:35:26 -0700
committerRichard Henderson <rth@twiddle.net>2012-09-13 07:35:26 -0700
commit361818d50219bd9be2c41954a702b748f2240099 (patch)
treea78006c6f6fc9a6b66cc6d987eed3ea563636803
parentb2d36dda9b8ca4d850f3b8e3e437a38368a51519 (diff)
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alpha: Add get-rounding-mode.h
-rw-r--r--ports/ChangeLog.alpha4
-rw-r--r--ports/sysdeps/alpha/fpu/get-rounding-mode.h35
2 files changed, 39 insertions, 0 deletions
diff --git a/ports/ChangeLog.alpha b/ports/ChangeLog.alpha
index 9589dd3..fbe42ac 100644
--- a/ports/ChangeLog.alpha
+++ b/ports/ChangeLog.alpha
@@ -1,3 +1,7 @@
+2012-12-13 Richard Henderson <rth@redhat.com>
+
+ * sysdeps/alpha/fpu/get-rounding-mode.h: New file.
+
2012-08-30 Richard Henderson <rth@redhat.com>
* sysdeps/alpha/fpu/s_isnan.c: Define all aliases in terms of
diff --git a/ports/sysdeps/alpha/fpu/get-rounding-mode.h b/ports/sysdeps/alpha/fpu/get-rounding-mode.h
new file mode 100644
index 0000000..9d5b724
--- /dev/null
+++ b/ports/sysdeps/alpha/fpu/get-rounding-mode.h
@@ -0,0 +1,35 @@
+/* Determine floating-point rounding mode within libc. Alpha version.
+ Copyright (C) 2012 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 ALPHA_GET_ROUNDING_MODE_H
+#define ALPHA_GET_ROUNDING_MODE_H 1
+
+#include <fenv.h>
+#include <fenv_libc.h>
+
+/* Return the floating-point rounding mode. */
+
+static inline int
+get_rounding_mode (void)
+{
+ unsigned long fpcr;
+ __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr));
+ return (fpcr >> FPCR_ROUND_SHIFT) & 3;
+}
+
+#endif /* get-rounding-mode.h */