Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpn / cray / rshift.c

diff --git a/gmp/mpn/cray/rshift.c b/gmp/mpn/cray/rshift.c
new file mode 100644 (file)
index 0000000..6280d2c
--- /dev/null
+++ b/gmp/mpn/cray/rshift.c
@@ -0,0 +1,48 @@
+/* mpn_rshift -- Shift right low level for Cray vector processors.
+
+Copyright (C) 2000 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP 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 3 of the License, or (at your
+option) any later version.
+
+The GNU MP 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 MP Library.  If not, see http://www.gnu.org/licenses/.  */
+
+#include <intrinsics.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+
+mp_limb_t
+mpn_rshift (mp_ptr wp, mp_srcptr up, mp_size_t n, unsigned int cnt)
+{
+  unsigned sh_1, sh_2;
+  mp_size_t i;
+  mp_limb_t retval;
+
+  sh_1 = cnt;
+  sh_2 = BITS_PER_MP_LIMB - sh_1;
+  retval = up[0] << sh_2;
+
+#pragma _CRI ivdep
+  for (i = 0; i < n - 1; i++)
+    {
+#if 1
+      wp[i] = (up[i] >> sh_1) | (up[i + 1] << sh_2);
+#else
+      /* This is the recommended way, but at least on SV1 it is slower.  */
+      wp[i] = _dshiftr (up[i + 1], up[i], sh_1);
+#endif
+    }
+
+  wp[n - 1] = up[n - 1] >> sh_1;
+  return retval;
+}