1 files changed, 102 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/m9x/fminf.c b/usr/src/lib/libm/common/m9x/fminf.c
new file mode 100644
index 0000000000..77ed8591d1
--- /dev/null
+++ b/usr/src/lib/libm/common/m9x/fminf.c
@@ -0,0 +1,102 @@
+/*
+ * 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.
+ */
+
+#if defined(ELFOBJ)
+#pragma weak fminf = __fminf
+#endif
+
+#include "libm.h"	/* for islessequal macro */
+
+float
+__fminf(float x, float y) {
+	/*
+	 * On SPARC v8plus/v9, this could be implemented as follows
+	 * (assuming %f0 = x, %f1 = y, return value left in %f0):
+	 *
+	 * fcmps	%fcc0,%f1,%f1
+	 * fmovsu	%fcc0,%f0,%f1
+	 * fcmps	%fcc0,%f0,%f1
+	 * fmovsug	%fcc0,%f1,%f0
+	 * st		%f0,[x]
+	 * st		%f1,[y]
+	 * ld		[x],%l0
+	 * ld		[y],%l1
+	 * or		%l0,%l1,%l2
+	 * sethi	%hi(0x80000000),%l3
+	 * and		%l3,%l2,%l2
+	 * or		%l0,%l2,%l0
+	 * st		%l0,[x]
+	 * ld		[x],%f0
+	 *
+	 * If VIS instructions are available, use this code instead:
+	 *
+	 * fcmps	%fcc0,%f1,%f1
+	 * fmovsu	%fcc0,%f0,%f1
+	 * fcmps	%fcc0,%f0,%f1
+	 * fmovsug	%fcc0,%f1,%f0
+	 * fors		%f0,%f1,%f2
+	 * fzeros	%f3
+	 * fnegs	%f3,%f3
+	 * fands	%f3,%f2,%f2
+	 * fors		%f0,%f2,%f0
+	 *
+	 * If VIS 3.0 instructions are available, use this:
+	 *
+	 * flcmps	%fcc0,%f0,%f1
+	 * fmovsge	%fcc0,%f1,%f0	! move if %fcc0 is 0 or 2
+	 */
+
+	union {
+		unsigned i;
+		float f;
+	} xx, yy;
+	unsigned s;
+
+	/* if y is nan, replace it by x */
+	if (y != y)
+		y = x;
+
+	/* if x is nan, replace it by y */
+	if (x != x)
+		x = y;
+
+	/* At this point, x and y are either both numeric, or both NaN */
+	if (!isnan(x) && !islessequal(x, y))
+		x = y;
+
+	/*
+	 * set the sign of the result if either x or y has its sign set
+	 */
+	xx.f = x;
+	yy.f = y;
+	s = (xx.i | yy.i) & 0x80000000;
+	xx.i |= s;
+
+	return (xx.f);
+}