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, 138 insertions, 0 deletions

diff --git a/usr/src/lib/libm/common/m9x/feexcept.c b/usr/src/lib/libm/common/m9x/feexcept.c
new file mode 100644
index 0000000000..03fe34fc5f
--- /dev/null
+++ b/usr/src/lib/libm/common/m9x/feexcept.c
@@ -0,0 +1,138 @@
+/*
+ * 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 feclearexcept = __feclearexcept
+#pragma weak feraiseexcept = __feraiseexcept
+#pragma weak fetestexcept = __fetestexcept
+#pragma weak fegetexceptflag = __fegetexceptflag
+#pragma weak fesetexceptflag = __fesetexceptflag
+
+#pragma weak feclearexcept96 = __feclearexcept
+#pragma weak feraiseexcept96 = __feraiseexcept
+#pragma weak fetestexcept96 = __fetestexcept
+#pragma weak fegetexceptflag96 = __fegetexceptflag
+#pragma weak fesetexceptflag96 = __fesetexceptflag
+
+#include "fenv_synonyms.h"
+#include <fenv.h>
+#include <sys/ieeefp.h>
+#include <ucontext.h>
+#include <thread.h>
+#include "fex_handler.h"
+#include "fenv_inlines.h"
+
+
+int feclearexcept(int e)
+{
+	unsigned long	fsr;
+
+	__fenv_getfsr(&fsr);
+	__fenv_set_ex(fsr, __fenv_get_ex(fsr) & ~e);
+	__fenv_setfsr(&fsr);
+	if (fex_get_log())
+		__fex_update_te();
+	return 0;
+}
+
+/*
+*  note - __fex_hdlr depends on fetestexcept following feraiseexcept
+*/
+int feraiseexcept(int e)
+{
+	volatile double	t;
+	unsigned long	fsr;
+
+	if (e & FE_INVALID) {
+		t = 0.0;
+		t /= 0.0;
+	}
+	if (e & FE_DIVBYZERO) {
+		t = 1.0e300;
+		t /= 0.0;
+	}
+	if (e & FE_OVERFLOW) {
+		/* if overflow is not trapped, avoid raising inexact */
+		__fenv_getfsr(&fsr);
+		if (!(__fenv_get_te(fsr) & (1 << fp_trap_overflow))) {
+			__fenv_set_ex(fsr, __fenv_get_ex(fsr) | FE_OVERFLOW);
+			__fenv_setfsr(&fsr);
+		}
+		else {
+			t = 1.0e300;
+			t *= 1.0e300;
+		}
+	}
+	if (e & FE_UNDERFLOW) {
+		/* if underflow is not trapped, avoid raising inexact */
+		__fenv_getfsr(&fsr);
+		if (!(__fenv_get_te(fsr) & (1 << fp_trap_underflow))) {
+			__fenv_set_ex(fsr, __fenv_get_ex(fsr) | FE_UNDERFLOW);
+			__fenv_setfsr(&fsr);
+		}
+		else {
+			t = 1.0e-307;
+			t -= 1.001e-307;
+		}
+	}
+	if (e & FE_INEXACT) {
+		t = 1.0e300;
+		t += 1.0e-307;
+	}
+	return 0;
+}
+
+int fetestexcept(int e)
+{
+	unsigned long	fsr;
+
+	__fenv_getfsr(&fsr);
+	return (int)__fenv_get_ex(fsr) & e;
+}
+
+int fegetexceptflag(fexcept_t *p, int e)
+{
+	unsigned long	fsr;
+
+	__fenv_getfsr(&fsr);
+	*p = (int)__fenv_get_ex(fsr) & e;
+	return 0;
+}
+
+int fesetexceptflag(const fexcept_t *p, int e)
+{
+	unsigned long	fsr;
+
+	__fenv_getfsr(&fsr);
+	__fenv_set_ex(fsr, (((int)__fenv_get_ex(fsr) & ~e) | (*p & e)) &
+		FE_ALL_EXCEPT);
+	__fenv_setfsr(&fsr);
+	if (fex_get_log())
+		__fex_update_te();
+	return 0;
+}