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authorBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2008-09-25 17:43:58 (GMT)
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2008-09-25 17:43:58 (GMT)
commit0e05d9826e6d32a27392ed9d6fe613ef6cf957a0 (patch)
tree6e88884bf2f757103209ad4d97d61f37db5cc1d7 /libm/s_isinff.c
parentcf7b82ed31eaa526c74f8b1af6f0cfec315f1d69 (diff)
- remove files that are not either LGPL or Public Domain.
- pull replacement funcs for fpmacros.c from glibc This removes the powerpc/classic implementation which did not state any license but read: Copyright © 1991 Apple Computer, Inc. All rights reserved. and thus was dubious (and not needed).
Diffstat (limited to 'libm/s_isinff.c')
-rw-r--r--libm/s_isinff.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/libm/s_isinff.c b/libm/s_isinff.c
new file mode 100644
index 0000000..33e2749
--- /dev/null
+++ b/libm/s_isinff.c
@@ -0,0 +1,30 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: s_isinff.c,v 1.3 1995/05/11 23:20:21 jtc Exp $";
+#endif
+
+/*
+ * isinff(x) returns 1 if x is inf, -1 if x is -inf, else 0;
+ * no branching!
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+libm_hidden_proto(__isinff)
+int
+__isinff (float x)
+{
+ int32_t ix,t;
+ GET_FLOAT_WORD(ix,x);
+ t = ix & 0x7fffffff;
+ t ^= 0x7f800000;
+ t |= -t;
+ return ~(t >> 31) & (ix >> 30);
+}
+libm_hidden_def (__isinff)
+weak_alias (__isinff, isinff)