Implement fpgetmask, it's needed by Python.

Approved by:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation

3 files changed, 49 insertions, 0 deletions

diff --git a/lib/libc/aarch64/Symbol.map b/lib/libc/aarch64/Symbol.map
index f51014d..d0056ef 100644
--- a/lib/libc/aarch64/Symbol.map
+++ b/lib/libc/aarch64/Symbol.map
@@ -15,6 +15,7 @@ FBSD_1.0 {
 	_longjmp;
 	fabs;
 	__flt_rounds;
+	fpgetmask;
 	fpsetmask;
 	setjmp;
 	longjmp;
diff --git a/lib/libc/aarch64/gen/Makefile.inc b/lib/libc/aarch64/gen/Makefile.inc
index 3d050dd..bb70a36 100644
--- a/lib/libc/aarch64/gen/Makefile.inc
+++ b/lib/libc/aarch64/gen/Makefile.inc
@@ -2,6 +2,7 @@
 
 SRCS+=	fabs.S \
 	flt_rounds.c \
+	fpgetmask.c \
 	fpsetmask.c \
 	ldexp.c \
 	_setjmp.S \
diff --git a/lib/libc/aarch64/gen/fpgetmask.c b/lib/libc/aarch64/gen/fpgetmask.c
new file mode 100644
index 0000000..afc05b4
--- /dev/null
+++ b/lib/libc/aarch64/gen/fpgetmask.c
@@ -0,0 +1,47 @@
+/*-
+ * Copyright (c) 2015 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Andrew Turner under
+ * sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <ieeefp.h>
+
+#define FP_X_MASK	(FP_X_INV | FP_X_DZ | FP_X_OFL | FP_X_UFL | FP_X_IMP)
+
+fp_except_t
+fpgetmask(void)
+{
+	uint64_t mask;
+
+	/* Read the current mask */
+	__asm __volatile("mrs %0, fpcr" : "=&r"(mask));
+
+	return (mask & FP_X_MASK);
+}