1 files changed, 54 insertions, 0 deletions
diff --git a/libc/dfp/sysdeps/ieee754r/d32/isinfd32.c b/libc/dfp/sysdeps/ieee754r/d32/isinfd32.c
new file mode 100644
index 000000000..e72a54eec
--- /dev/null
+++ b/libc/dfp/sysdeps/ieee754r/d32/isinfd32.c
@@ -0,0 +1,54 @@
+/* Returns non-zero if the _Decimal32 is infinite
+   Copyright (C) 2006 IBM Corporation.
+
+   Author(s): Joseph Kerian <jkerian@us.ibm.com>
+
+   The Decimal Floating Point C Library is free software; you can
+   redistribute it and/or modify it under the terms of the GNU Lesser
+   General Public License version 2.1.
+
+   The Decimal Floating Point 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 version 2.1 for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License version 2.1 along with the Decimal Floating Point C Library;
+   if not, write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA 02111-1307 USA.
+
+   Please see dfp/COPYING.txt for more information.  */
+
+#ifndef _DECIMAL_SIZE
+#  define _DECIMAL_SIZE 32
+#  include <decimal32.h>
+#endif
+
+#include <math.h>
+#include <endian.h>
+
+#define FUNCTION_NAME isinf
+
+#include <dfpmacro.h>
+
+int
+INTERNAL_FUNCTION_NAME (DEC_TYPE x)
+{
+  uint8_t top_byte;
+  union
+  {
+    DEC_TYPE dec;
+    uint8_t bytes[_DECIMAL_SIZE/8];
+  } u_conv;
+
+  u_conv.dec = x;
+#if BYTE_ORDER == BIG_ENDIAN
+  top_byte = u_conv.bytes[0];
+#else
+  top_byte = u.conv.bytes[_DECIMAL_SIZE/8 -1];
+#endif
+
+  return (top_byte & DECIMAL_Inf) == DECIMAL_Inf;
+}
+
+weak_alias (INTERNAL_FUNCTION_NAME, EXTERNAL_FUNCTION_NAME)