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authorUlrich Drepper <drepper@redhat.com>1999-07-14 00:54:57 +0000
committerUlrich Drepper <drepper@redhat.com>1999-07-14 00:54:57 +0000
commitabfbdde177c3a7155070dda1b2cdc8292054cc26 (patch)
treee021306b596381fbf8311d2b7eb294e918ff17c8 /sysdeps/generic/e_scalbf.c
parent86421aa57ecfd70963ae66848bd6a6dd3b8e0fe6 (diff)
Update.
Diffstat (limited to 'sysdeps/generic/e_scalbf.c')
-rw-r--r--sysdeps/generic/e_scalbf.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/sysdeps/generic/e_scalbf.c b/sysdeps/generic/e_scalbf.c
new file mode 100644
index 0000000000..f51057e7b4
--- /dev/null
+++ b/sysdeps/generic/e_scalbf.c
@@ -0,0 +1,56 @@
+/* e_scalbf.c -- float version of e_scalb.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: e_scalbf.c,v 1.3 1995/05/10 20:46:12 jtc Exp $";
+#endif
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef _SCALB_INT
+#ifdef __STDC__
+ float __ieee754_scalbf(float x, int fn)
+#else
+ float __ieee754_scalbf(x,fn)
+ float x; int fn;
+#endif
+#else
+#ifdef __STDC__
+ float __ieee754_scalbf(float x, float fn)
+#else
+ float __ieee754_scalbf(x,fn)
+ float x, fn;
+#endif
+#endif
+{
+#ifdef _SCALB_INT
+ return __scalbnf(x,fn);
+#else
+ if (__isnanf(x)||__isnanf(fn)) return x*fn;
+ if (!__finitef(fn)) {
+ if(fn>(float)0.0) return x*fn;
+ else if (x == 0)
+ return x;
+ else if (!__finitef (x))
+ return __nanf ("");
+ else return x/(-fn);
+ }
+ if (__rintf(fn)!=fn) return __nanf ("");
+ if ( fn > (float)65000.0) return __scalbnf(x, 65000);
+ if (-fn > (float)65000.0) return __scalbnf(x,-65000);
+ return __scalbnf(x,(int)fn);
+#endif
+}