Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpz / aors.h

diff --git a/gmp/mpz/aors.h b/gmp/mpz/aors.h
new file mode 100644 (file)
index 0000000..208c515
--- /dev/null
+++ b/gmp/mpz/aors.h
@@ -0,0 +1,132 @@
+/* mpz_add, mpz_sub -- add or subtract integers.
+
+Copyright 1991, 1993, 1994, 1996, 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 "gmp.h"
+#include "gmp-impl.h"
+
+
+#ifdef BERKELEY_MP
+
+#include "mp.h"
+#ifdef OPERATION_add
+#define FUNCTION     madd
+#define VARIATION
+#endif
+#ifdef OPERATION_sub
+#define FUNCTION     msub
+#define VARIATION    -
+#endif
+#define ARGUMENTS    mpz_srcptr u, mpz_srcptr v, mpz_ptr w
+
+#else /* normal GMP */
+
+#ifdef OPERATION_add
+#define FUNCTION     mpz_add
+#define VARIATION
+#endif
+#ifdef OPERATION_sub
+#define FUNCTION     mpz_sub
+#define VARIATION    -
+#endif
+#define ARGUMENTS    mpz_ptr w, mpz_srcptr u, mpz_srcptr v
+
+#endif
+
+#ifndef FUNCTION
+Error, need OPERATION_add or OPERATION_sub
+#endif
+
+
+void
+FUNCTION (ARGUMENTS)
+{
+  mp_srcptr up, vp;
+  mp_ptr wp;
+  mp_size_t usize, vsize, wsize;
+  mp_size_t abs_usize;
+  mp_size_t abs_vsize;
+
+  usize = u->_mp_size;
+  vsize = VARIATION v->_mp_size;
+  abs_usize = ABS (usize);
+  abs_vsize = ABS (vsize);
+
+  if (abs_usize < abs_vsize)
+    {
+      /* Swap U and V. */
+      MPZ_SRCPTR_SWAP (u, v);
+      MP_SIZE_T_SWAP (usize, vsize);
+      MP_SIZE_T_SWAP (abs_usize, abs_vsize);
+    }
+
+  /* True: ABS_USIZE >= ABS_VSIZE.  */
+
+  /* If not space for w (and possible carry), increase space.  */
+  wsize = abs_usize + 1;
+  if (w->_mp_alloc < wsize)
+    _mpz_realloc (w, wsize);
+
+  /* These must be after realloc (u or v may be the same as w).  */
+  up = u->_mp_d;
+  vp = v->_mp_d;
+  wp = w->_mp_d;
+
+  if ((usize ^ vsize) < 0)
+    {
+      /* U and V have different sign.  Need to compare them to determine
+        which operand to subtract from which.  */
+
+      /* This test is right since ABS_USIZE >= ABS_VSIZE.  */
+      if (abs_usize != abs_vsize)
+       {
+         mpn_sub (wp, up, abs_usize, vp, abs_vsize);
+         wsize = abs_usize;
+         MPN_NORMALIZE (wp, wsize);
+         if (usize < 0)
+           wsize = -wsize;
+       }
+      else if (mpn_cmp (up, vp, abs_usize) < 0)
+       {
+         mpn_sub_n (wp, vp, up, abs_usize);
+         wsize = abs_usize;
+         MPN_NORMALIZE (wp, wsize);
+         if (usize >= 0)
+           wsize = -wsize;
+       }
+      else
+       {
+         mpn_sub_n (wp, up, vp, abs_usize);
+         wsize = abs_usize;
+         MPN_NORMALIZE (wp, wsize);
+         if (usize < 0)
+           wsize = -wsize;
+       }
+    }
+  else
+    {
+      /* U and V have same sign.  Add them.  */
+      mp_limb_t cy_limb = mpn_add (wp, up, abs_usize, vp, abs_vsize);
+      wp[abs_usize] = cy_limb;
+      wsize = abs_usize + cy_limb;
+      if (usize < 0)
+       wsize = -wsize;
+    }
+
+  w->_mp_size = wsize;
+}