1 files changed, 83 insertions, 0 deletions
diff --git a/libc/dfp/sysdeps/ieee754r/d32/scalblnd32.c b/libc/dfp/sysdeps/ieee754r/d32/scalblnd32.c
new file mode 100644
index 000000000..11c05a081
--- /dev/null
+++ b/libc/dfp/sysdeps/ieee754r/d32/scalblnd32.c
@@ -0,0 +1,83 @@
+/* Returns x * FLT_RADIX^y without computing the right side directly
+   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
+#  include <decimal32.h>
+#  define _DECIMAL_SIZE 32
+#endif
+
+#include <decContext.h>
+#include <decNumber.h>
+#include <math.h>
+#include <errno.h>
+
+#define FUNCTION_NAME scalbln
+
+#include <dfpmacro.h>
+
+DEC_TYPE
+IEEE_FUNCTION_NAME (DEC_TYPE x, long y)
+{
+  decContext context;
+  DEC_TYPE result;
+  decNumber dn_x;
+  long long int sum=0LL;
+  uint32_t temp2 = 0;
+  /* Otherwise this may pass a bad residue to decFinalize which can result in
+   * rounding error.  */
+  int32_t temp = 0;
+
+  FUNC_CONVERT_TO_DN(&x, &dn_x);
+  if (___decNumberIsNaN (&dn_x))
+    return x+x;
+  if (___decNumberIsInfinite (&dn_x) || ___decNumberIsZero (&dn_x) || y==0L)
+    return x;
+
+  ___decContextDefault(&context, DEFAULT_CONTEXT);
+  sum = dn_x.exponent + y;
+  if(sum >= 1000000000LL || sum <= -2000000000LL
+    || y >= 1000000000L || y <= -2000000000L)
+    ; /** definite overflow */
+  else
+    dn_x.exponent = sum;
+
+  ___decFinalize(&dn_x, &context, &temp, &temp2);
+
+  FUNC_CONVERT_FROM_DN(&dn_x, &result, &context);
+  if (context.status & DEC_Overflow)
+    DFP_EXCEPT (FE_OVERFLOW);
+
+  return result;
+}
+
+DEC_TYPE
+INTERNAL_FUNCTION_NAME (DEC_TYPE x, long y)
+{
+  DEC_TYPE z = IEEE_FUNCTION_NAME (x, y);
+#ifndef _IEEE_LIBDFP
+  if (_LIB_VERSION == _IEEE_) return z;
+  if (!FUNC_D(__finite) (z) && FUNC_D(__finite) (x))
+    DFP_ERRNO (ERANGE);
+#endif
+  return z;
+}
+
+weak_alias (INTERNAL_FUNCTION_NAME, EXTERNAL_FUNCTION_NAME)