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diff --git a/sysdeps/libm-i387/s_logb.S b/sysdeps/libm-i387/s_logb.S
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+++ b/sysdeps/libm-i387/s_logb.S
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+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+#include <machine/asm.h>
+
+RCSID("$NetBSD: s_logb.S,v 1.4 1995/05/09 00:14:30 jtc Exp $")
+
+ENTRY(__logb)
+	fldl	4(%esp)
+	fxtract
+	fstpl	%st
+	ret
+weak_alias (__logb, logb)