From 8a0efa53e44919bcf5ccb1d3353618a82afdf8bc Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Thu, 17 Feb 2000 19:39:52 +0000
Subject: import newlib-2000-02-17 snapshot

---
 newlib/libm/math/s_isinf.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 newlib/libm/math/s_isinf.c

(limited to 'newlib/libm/math/s_isinf.c')

diff --git a/newlib/libm/math/s_isinf.c b/newlib/libm/math/s_isinf.c
new file mode 100644
index 000000000..87f099566
--- /dev/null
+++ b/newlib/libm/math/s_isinf.c
@@ -0,0 +1,26 @@
+/*
+ * isinf(x) returns 1 if x is infinity, else 0;
+ * no branching!
+ * Added by Cygnus Support.
+ */
+
+#include "fdlibm.h"
+
+#ifndef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+	int isinf(double x)
+#else
+	int isinf(x)
+	double x;
+#endif
+{
+	__int32_t hx,lx;
+	EXTRACT_WORDS(hx,lx,x);
+	hx &= 0x7fffffff;
+	hx |= (__uint32_t)(lx|(-lx))>>31;	
+	hx = 0x7ff00000 - hx;
+	return 1 - (int)((__uint32_t)(hx|(-hx))>>31);
+}
+
+#endif /* _DOUBLE_IS_32BITS */
-- 
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