From 48ef7704c03e7e554c05de01bf8d1d70c16cb6f4 Mon Sep 17 00:00:00 2001
From: ProjectRevoTPP <projectrevotpp@hotmail.com>
Date: Wed, 20 Dec 2017 16:34:35 -0500
Subject: add libc building to agbcc.

---
 libc/math/s_ldexp.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 libc/math/s_ldexp.c

(limited to 'libc/math/s_ldexp.c')

diff --git a/libc/math/s_ldexp.c b/libc/math/s_ldexp.c
new file mode 100644
index 0000000..ccf7171
--- /dev/null
+++ b/libc/math/s_ldexp.c
@@ -0,0 +1,81 @@
+
+/* @(#)s_ldexp.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+/*
+FUNCTION
+       <<ldexp>>, <<ldexpf>>---load exponent
+
+INDEX
+	ldexp
+INDEX
+	ldexpf
+
+ANSI_SYNOPSIS
+       #include <math.h>
+       double ldexp(double <[val]>, int <[exp]>);
+       float ldexpf(float <[val]>, int <[exp]>);
+
+TRAD_SYNOPSIS
+       #include <math.h>
+
+       double ldexp(<[val]>, <[exp]>)
+              double <[val]>;
+              int <[exp]>;
+
+       float ldexpf(<[val]>, <[exp]>)
+              float <[val]>;
+              int <[exp]>;
+
+
+DESCRIPTION
+<<ldexp>> calculates the value 
+@ifinfo
+<[val]> times 2 to the power <[exp]>.
+@end ifinfo
+@tex
+$val\times 2^{exp}$.
+@end tex
+<<ldexpf>> is identical, save that it takes and returns <<float>>
+rather than <<double>> values.
+
+RETURNS
+<<ldexp>> returns the calculated value.
+
+Underflow and overflow both set <<errno>> to <<ERANGE>>.
+On underflow, <<ldexp>> and <<ldexpf>> return 0.0.
+On overflow, <<ldexp>> returns plus or minus <<HUGE_VAL>>.
+
+PORTABILITY
+<<ldexp>> is ANSI, <<ldexpf>> is an extension.
+              
+*/   
+
+#include "fdlibm.h"
+#include <errno.h>
+
+#ifndef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+	double ldexp(double value, int exp)
+#else
+	double ldexp(value, exp)
+	double value; int exp;
+#endif
+{
+	if(!finite(value)||value==0.0) return value;
+	value = scalbn(value,exp);
+	if(!finite(value)||value==0.0) errno = ERANGE;
+	return value;
+}
+
+#endif /* _DOUBLE_IS_32BITS */
-- 
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