Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpbsd / sdiv.c

diff --git a/gmp/mpbsd/sdiv.c b/gmp/mpbsd/sdiv.c
new file mode 100644 (file)
index 0000000..802fe52
--- /dev/null
+++ b/gmp/mpbsd/sdiv.c
@@ -0,0 +1,67 @@
+/* sdiv -- Divide a MINT by a short integer.  Produce a MINT quotient
+   and a short remainder.
+
+Copyright 1991, 1994, 1995, 2000, 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 "mp.h"
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "longlong.h"
+
+void
+sdiv (const MINT *dividend, signed short int divisor_short, MINT *quot, short *rem_ptr)
+{
+  mp_size_t sign_dividend;
+  signed long int sign_divisor;
+  mp_size_t dividend_size, quot_size;
+  mp_ptr dividend_ptr, quot_ptr;
+  mp_limb_t divisor_limb;
+  mp_limb_t remainder_limb;
+
+  sign_dividend = dividend->_mp_size;
+  dividend_size = ABS (dividend->_mp_size);
+
+  if (dividend_size == 0)
+    {
+      quot->_mp_size = 0;
+      *rem_ptr = 0;
+      return;
+    }
+
+  sign_divisor = divisor_short;
+  divisor_limb = (unsigned short) ABS (divisor_short);
+
+  /* No need for temporary allocation and copying even if QUOT == DIVIDEND
+     as the divisor is just one limb, and thus no intermediate remainders
+     need to be stored.  */
+
+  if (quot->_mp_alloc < dividend_size)
+    _mp_realloc (quot, dividend_size);
+
+  quot_ptr = quot->_mp_d;
+  dividend_ptr = dividend->_mp_d;
+
+  remainder_limb = mpn_divmod_1 (quot_ptr,
+                                dividend_ptr, dividend_size, divisor_limb);
+
+  *rem_ptr = sign_dividend >= 0 ? remainder_limb : -remainder_limb;
+  /* The quotient is DIVIDEND_SIZE limbs, but the most significant
+     might be zero.  Set QUOT_SIZE properly. */
+  quot_size = dividend_size - (quot_ptr[dividend_size - 1] == 0);
+  quot->_mp_size = (sign_divisor ^ sign_dividend) >= 0 ? quot_size : -quot_size;
+}