Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpf / pow_ui.c

diff --git a/gmp/mpf/pow_ui.c b/gmp/mpf/pow_ui.c
new file mode 100644 (file)
index 0000000..5d02914
--- /dev/null
+++ b/gmp/mpf/pow_ui.c
@@ -0,0 +1,43 @@
+/* mpf_pow_ui -- Compute b^e.
+
+Copyright 1998, 1999, 2001 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 "gmp.h"
+#include "gmp-impl.h"
+
+void
+mpf_pow_ui (mpf_ptr r, mpf_srcptr b, unsigned long int e)
+{
+  mpf_t b2;
+  unsigned long int e2;
+
+  mpf_init2 (b2, mpf_get_prec (r));
+  mpf_set (b2, b);
+  mpf_set_ui (r, 1);
+
+  if ((e & 1) != 0)
+    mpf_set (r, b2);
+  for (e2 = e >> 1; e2 != 0; e2 >>= 1)
+    {
+      mpf_mul (b2, b2, b2);
+      if ((e2 & 1) != 0)
+       mpf_mul (r, r, b2);
+    }
+
+  mpf_clear (b2);
+}