Add femode_t functions: ia64.

This patch adds IA64 versions of fegetmode and fesetmode.  Untested.

	* sysdeps/ia64/fpu/fegetmode.c: New file.
	* sysdeps/ia64/fpu/fesetmode.c: Likewise.

3 files changed, 71 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index a1b3103f47..efb1364120 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2016-09-07  Joseph Myers  <joseph@codesourcery.com>
 
+	* sysdeps/ia64/fpu/fegetmode.c: New file.
+	* sysdeps/ia64/fpu/fesetmode.c: Likewise.
+
 	* sysdeps/hppa/fpu/fegetmode.c: New file.
 	* sysdeps/hppa/fpu/fesetmode.c: Likewise.
 
diff --git a/sysdeps/ia64/fpu/fegetmode.c b/sysdeps/ia64/fpu/fegetmode.c
new file mode 100644
index 0000000000..0ccaa8f3ac
--- /dev/null
+++ b/sysdeps/ia64/fpu/fegetmode.c
@@ -0,0 +1,26 @@
+/* Store current floating-point control modes.  IA64 version.
+   Copyright (C) 2016 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/>.  */
+
+#include <fenv.h>
+
+int
+fegetmode (femode_t *modep)
+{
+  __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (*modep));
+  return 0;
+}
diff --git a/sysdeps/ia64/fpu/fesetmode.c b/sysdeps/ia64/fpu/fesetmode.c
new file mode 100644
index 0000000000..11187e9c89
--- /dev/null
+++ b/sysdeps/ia64/fpu/fesetmode.c
@@ -0,0 +1,42 @@
+/* Install given floating-point control modes.  IA64 version.
+   Copyright (C) 2016 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/>.  */
+
+#include <fenv.h>
+
+#define FPSR_STATUS 0x1f80UL
+#define FPSR_STATUS_ALL ((FPSR_STATUS << 6) | (FPSR_STATUS << 19) \
+			 | (FPSR_STATUS << 32) | (FPSR_STATUS << 45))
+
+int
+fesetmode (const femode_t *modep)
+{
+  femode_t mode;
+
+  /* As in fesetenv.  */
+  if (((fenv_t) modep >> 62) == 0x03)
+    mode = (femode_t) modep & 0x3fffffffffffffffUL;
+  else
+    mode = *modep;
+
+  femode_t fpsr;
+  __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (fpsr));
+  fpsr = (fpsr & FPSR_STATUS_ALL) | (mode & ~FPSR_STATUS_ALL);
+  __asm__ __volatile__ ("mov.m ar.fpsr=%0;;" :: "r" (fpsr));
+
+  return 0;
+}