aboutsummaryrefslogtreecommitdiffstats
path: root/lib/msun/i387/s_floor.S
diff options
context:
space:
mode:
Diffstat (limited to 'lib/msun/i387/s_floor.S')
-rw-r--r--lib/msun/i387/s_floor.S57
1 files changed, 57 insertions, 0 deletions
diff --git a/lib/msun/i387/s_floor.S b/lib/msun/i387/s_floor.S
new file mode 100644
index 000000000000..6da994090952
--- /dev/null
+++ b/lib/msun/i387/s_floor.S
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 1993,94 Winning Strategies, Inc.
+ * All rights reserved.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Winning Strategies, Inc.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
+ */
+
+/*
+ * Written by:
+ * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
+ */
+
+#include "DEFS.h"
+
+
+ENTRY(floor)
+ pushl %ebp
+ movl %esp,%ebp
+ subl $8,%esp
+
+ fstcw -12(%ebp) /* store fpu control word */
+ movw -12(%ebp),%dx
+ orw $0x0400,%dx /* round towards -oo */
+ andw $0xf7ff,%dx
+ movw %dx,-16(%ebp)
+ fldcw -16(%ebp) /* load modfied control word */
+
+ fldl 8(%ebp); /* round */
+ frndint
+
+ fldcw -12(%ebp) /* restore original control word */
+
+ leave
+ ret