Imported gcc-4.4.3

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

diff --git a/gmp/mpz/mul_i.h b/gmp/mpz/mul_i.h
new file mode 100644 (file)
index 0000000..d861960
--- /dev/null
+++ b/gmp/mpz/mul_i.h
@@ -0,0 +1,96 @@
+/* mpz_mul_ui/si (product, multiplier, small_multiplicand) -- Set PRODUCT to
+   MULTIPLICATOR times SMALL_MULTIPLICAND.
+
+Copyright 1991, 1993, 1994, 1996, 2000, 2001, 2002, 2005, 2008 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 OPERATION_mul_si
+#define FUNCTION               mpz_mul_si
+#define MULTIPLICAND_UNSIGNED
+#define MULTIPLICAND_ABS(x)    ((unsigned long) ABS(x))
+#endif
+
+#ifdef OPERATION_mul_ui
+#define FUNCTION               mpz_mul_ui
+#define MULTIPLICAND_UNSIGNED  unsigned
+#define MULTIPLICAND_ABS(x)    x
+#endif
+
+#ifndef FUNCTION
+Error, error, unrecognised OPERATION
+#endif
+
+
+void
+FUNCTION (mpz_ptr prod, mpz_srcptr mult,
+          MULTIPLICAND_UNSIGNED long int small_mult)
+{
+  mp_size_t size = SIZ(mult);
+  mp_size_t sign_product = size;
+  mp_limb_t sml;
+  mp_limb_t cy;
+  mp_ptr pp;
+
+  if (size == 0 || small_mult == 0)
+    {
+      SIZ(prod) = 0;
+      return;
+    }
+
+  size = ABS (size);
+
+  sml = MULTIPLICAND_ABS (small_mult);
+
+  if (sml <= GMP_NUMB_MAX)
+    {
+      MPZ_REALLOC (prod, size + 1);
+      pp = PTR(prod);
+      cy = mpn_mul_1 (pp, PTR(mult), size, sml & GMP_NUMB_MASK);
+      pp[size] = cy;
+      size += cy != 0;
+    }
+#if GMP_NAIL_BITS != 0
+  else
+    {
+      /* Operand too large for the current nails size.  Use temporary for
+        intermediate products, to allow prod and mult being identical.  */
+      mp_ptr tp;
+      TMP_DECL;
+      TMP_MARK;
+
+      tp = TMP_ALLOC_LIMBS (size + 2);
+
+      cy = mpn_mul_1 (tp, PTR(mult), size, sml & GMP_NUMB_MASK);
+      tp[size] = cy;
+      cy = mpn_addmul_1 (tp + 1, PTR(mult), size, sml >> GMP_NUMB_BITS);
+      tp[size + 1] = cy;
+      size += 2;
+      MPN_NORMALIZE_NOT_ZERO (tp, size); /* too general, need to trim one or two limb */
+      MPZ_REALLOC (prod, size);
+      pp = PTR(prod);
+      MPN_COPY (pp, tp, size);
+      TMP_FREE;
+    }
+#endif
+
+  SIZ(prod) = ((sign_product < 0) ^ (small_mult < 0)) ? -size : size;
+}