auto import from //depot/cupcake/@135843
diff --git a/libm/i387/s_floorf.S b/libm/i387/s_floorf.S
new file mode 100644
index 0000000..5d39acd
--- /dev/null
+++ b/libm/i387/s_floorf.S
@@ -0,0 +1,29 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+#include <machine/asm.h>
+
+__FBSDID("$FreeBSD: src/lib/msun/i387/s_floorf.S,v 1.2 2005/05/06 15:44:20 deischen Exp $");
+/* RCSID("$NetBSD: s_floorf.S,v 1.3 1995/05/09 00:04:32 jtc Exp $") */
+
+ENTRY(floorf)
+ pushl %ebp
+ movl %esp,%ebp
+ subl $8,%esp
+
+ fstcw -4(%ebp) /* store fpu control word */
+ movw -4(%ebp),%dx
+ orw $0x0400,%dx /* round towards -oo */
+ andw $0xf7ff,%dx
+ movw %dx,-8(%ebp)
+ fldcw -8(%ebp) /* load modfied control word */
+
+ flds 8(%ebp); /* round */
+ frndint
+
+ fldcw -4(%ebp) /* restore original control word */
+
+ leave
+ ret