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authorUlrich Drepper <drepper@redhat.com>2005-12-14 15:06:39 +0000
committerUlrich Drepper <drepper@redhat.com>2005-12-14 15:06:39 +0000
commit9d13fb2413921c713f83efe331e8e4d219c62c6b (patch)
tree2d44d7ac45ab2d147eb8361bbff880c365aa8ad5 /math/e_scalbf.c
parentb6ab06cef4670e02756bcdd4d2c33a49369a4346 (diff)
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Moved to csu/errno-loc.c.
Diffstat (limited to 'math/e_scalbf.c')
-rw-r--r--math/e_scalbf.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/math/e_scalbf.c b/math/e_scalbf.c
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+/* 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 <fenv.h>
+#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))
+ {
+# ifdef FE_INVALID
+ feraiseexcept (FE_INVALID);
+# endif
+ return __nanf ("");
+ }
+ else return x/(-fn);
+ }
+ if (__rintf(fn)!=fn)
+ {
+# ifdef FE_INVALID
+ feraiseexcept (FE_INVALID);
+# endif
+ 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
+}