1 files changed, 90 insertions, 0 deletions
diff --git a/libguile/ieee-754.h b/libguile/ieee-754.h
new file mode 100644
index 000000000..e345efaae
--- /dev/null
+++ b/libguile/ieee-754.h
@@ -0,0 +1,90 @@
+/* Copyright (C) 1992, 1995, 1996, 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef SCM_IEEE_754_H
+#define SCM_IEEE_754_H 1
+
+/* Based on glibc's <ieee754.h> and modified by Ludovic Courtès to include
+   all possible IEEE-754 double-precision representations.  */
+
+
+/* IEEE 754 simple-precision format (32-bit).  */
+
+union scm_ieee754_float
+  {
+    float f;
+
+    struct
+      {
+	unsigned int negative:1;
+	unsigned int exponent:8;
+	unsigned int mantissa:23;
+      } big_endian;
+
+    struct
+      {
+      	unsigned int mantissa:23;
+	unsigned int exponent:8;
+	unsigned int negative:1;
+      } little_endian;
+  };
+
+
+
+/* IEEE 754 double-precision format (64-bit).  */
+
+union scm_ieee754_double
+  {
+    double d;
+
+    struct
+      {
+	/* Big endian.  */
+
+	unsigned int negative:1;
+	unsigned int exponent:11;
+	/* Together these comprise the mantissa.  */
+	unsigned int mantissa0:20;
+	unsigned int mantissa1:32;
+      } big_endian;
+
+    struct
+      {
+	/* Both byte order and word order are little endian.  */
+
+	/* Together these comprise the mantissa.  */
+	unsigned int mantissa1:32;
+	unsigned int mantissa0:20;
+	unsigned int exponent:11;
+	unsigned int negative:1;
+      } little_little_endian;
+
+    struct
+      {
+	/* Byte order is little endian but word order is big endian.  Not
+	   sure this is very wide spread.  */
+	unsigned int mantissa0:20;
+	unsigned int exponent:11;
+	unsigned int negative:1;
+	unsigned int mantissa1:32;
+      } little_big_endian;
+
+  };
+
+
+#endif /* SCM_IEEE_754_H */