693 Opensource replacement of sunwlibm

Reviewed by: Igor Kozhukhov ikozhukhov@gmail.com
Reviewed by: Keith M Wesolowski <keith.wesolowski@joyent.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Dan McDonald <danmcd@omniti.com>

1 files changed, 118 insertions, 0 deletions

diff --git a/usr/src/lib/libm/common/m9x/fenv.c b/usr/src/lib/libm/common/m9x/fenv.c
new file mode 100644
index 0000000000..cf8f2ca72b
--- /dev/null
+++ b/usr/src/lib/libm/common/m9x/fenv.c
@@ -0,0 +1,118 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma weak fex_merge_flags = __fex_merge_flags
+
+#pragma weak feholdexcept = __feholdexcept
+#pragma weak feupdateenv = __feupdateenv
+#pragma weak fegetenv = __fegetenv
+#pragma weak fesetenv = __fesetenv
+
+#pragma weak feholdexcept96 = __feholdexcept96
+#pragma weak feupdateenv96 = __feupdateenv
+#pragma weak fegetenv96 = __fegetenv
+#pragma weak fesetenv96 = __fesetenv
+
+#include "fenv_synonyms.h"
+#include <fenv.h>
+#include <ucontext.h>
+#include <thread.h>
+#include "fex_handler.h"
+#include "fenv_inlines.h"
+
+const fenv_t __fenv_dfl_env = {
+	{
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+		{ FEX_NONSTOP, (void(*)())0 },
+	},
+#ifdef __x86
+	0x13000000
+#else
+	0
+#endif
+};
+
+int feholdexcept(fenv_t *p)
+{
+	(void) fegetenv(p);
+	(void) feclearexcept(FE_ALL_EXCEPT);
+	return !fex_set_handling(FEX_ALL, FEX_NONSTOP, NULL);
+}
+
+int feholdexcept96(fenv_t *p)
+{
+	(void) fegetenv(p);
+	(void) feclearexcept(FE_ALL_EXCEPT);
+	return fex_set_handling(FEX_ALL, FEX_NONSTOP, NULL);
+}
+
+int feupdateenv(const fenv_t *p)
+{
+	unsigned long	fsr;
+
+	__fenv_getfsr(&fsr);
+	(void) fesetenv(p);
+	(void) feraiseexcept((int)__fenv_get_ex(fsr));
+	return 0;
+}
+
+int fegetenv(fenv_t *p)
+{
+	fex_getexcepthandler(&p->__handlers, FEX_ALL);
+	__fenv_getfsr(&p->__fsr);
+	return 0;
+}
+
+int fesetenv(const fenv_t *p)
+{
+	__fenv_setfsr(&p->__fsr);
+	fex_setexcepthandler(&p->__handlers, FEX_ALL);
+	return 0;
+}
+
+void fex_merge_flags(const fenv_t *p)
+{
+	unsigned long	fsr;
+
+	__fenv_getfsr(&fsr);
+	__fenv_set_ex(fsr, __fenv_get_ex(fsr) | __fenv_get_ex(p->__fsr));
+	__fenv_setfsr(&fsr);
+	if (fex_get_log())
+		__fex_update_te();
+}