X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/698bd937e9f4e5e32d536757fc0631bc8e7b9d85..2685767a6125c1620719c7de6234aedf41857b7e:/mpx.h

diff --git a/mpx.h b/mpx.h
index 076f14a..b633e43 100644
--- a/mpx.h
+++ b/mpx.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: mpx.h,v 1.9 1999/12/22 15:49:07 mdw Exp $
+ * $Id: mpx.h,v 1.12 2001/04/03 19:36:05 mdw Exp $
  *
  * Low level multiprecision arithmetic
  *
@@ -30,6 +30,15 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: mpx.h,v $
+ * Revision 1.12  2001/04/03 19:36:05  mdw
+ * Add some simple bitwise operations so that Perl can use them.
+ *
+ * Revision 1.11  2000/10/08 15:48:35  mdw
+ * Rename Karatsuba constants now that we have @gfx_kmul@ too.
+ *
+ * Revision 1.10  2000/10/08 12:06:12  mdw
+ * Provide @mpx_ueq@ for rapidly testing equality of two integers.
+ *
  * Revision 1.9  1999/12/22 15:49:07  mdw
  * New function for division by a small integer.
  *
@@ -298,6 +307,34 @@ extern void mpx_lsr(mpw */*dv*/, mpw */*dvl*/,
 		    const mpw */*av*/, const mpw */*avl*/,
 		    size_t /*n*/);
 
+/*----- Bitwise operations ------------------------------------------------*/
+
+/* --- @mpx_and@, @mpx_or@, @mpx_xor@, @mpx_not@ --- *
+ *
+ * Arguments:	@mpw *dv, *dvl@ = destination vector
+ *		@const mpw *av, *avl@ = first source vector
+ *		@const mpw *bv, *bvl@ = second source vector
+ *
+ * Returns:	---
+ *
+ * Use;		Does the obvious bitwise operations.
+ */
+
+extern void mpx_and(mpw */*dv*/, mpw */*dvl*/,
+		    const mpw */*av*/, const mpw */*avl*/,
+		    const mpw */*bv*/, const mpw */*bvl*/);
+
+extern void mpx_or(mpw */*dv*/, mpw */*dvl*/,
+		   const mpw */*av*/, const mpw */*avl*/,
+		   const mpw */*bv*/, const mpw */*bvl*/);
+
+extern void mpx_xor(mpw */*dv*/, mpw */*dvl*/,
+		    const mpw */*av*/, const mpw */*avl*/,
+		    const mpw */*bv*/, const mpw */*bvl*/);
+
+extern void mpx_not(mpw */*dv*/, mpw */*dvl*/,
+		    const mpw */*av*/, const mpw */*avl*/);
+
 /*----- Unsigned arithmetic -----------------------------------------------*/
 
 /* --- @mpx_2c@ --- *
@@ -313,6 +350,19 @@ extern void mpx_lsr(mpw */*dv*/, mpw */*dvl*/,
 extern void mpx_2c(mpw */*dv*/, mpw */*dvl*/,
 		   const mpw */*v*/, const mpw */*vl*/);
 
+/* --- @mpx_ueq@ --- *
+ *
+ * Arguments:	@const mpw *av, *avl@ = first argument vector base and limit
+ *		@const mpw *bv, *bvl@ = second argument vector base and limit
+ *
+ * Returns:	Nonzero if the two vectors are equal.
+ *
+ * Use:		Performs an unsigned integer test for equality.
+ */
+
+extern int mpx_ueq(const mpw */*av*/, const mpw */*avl*/,
+		   const mpw */*bv*/, const mpw */*bvl*/);
+
 /* --- @mpx_ucmp@ --- *
  *
  * Arguments:	@const mpw *av, *avl@ = first argument vector base and limit
@@ -559,23 +609,23 @@ extern mpw mpx_udivn(mpw */*qv*/, mpw */*qvl*/,
 
 /*----- Karatsuba multiplication algorithms -------------------------------*/
 
-/* --- @KARATSUBA_CUTOFF@ --- *
+/* --- @MPK_THRESH@ --- *
  *
  * This is the limiting length for using Karatsuba algorithms.  It's best to
  * use the simpler classical multiplication method on numbers smaller than
  * this.
  */
 
-#define KARATSUBA_CUTOFF 16
+#define MPK_THRESH 16
 
-/* --- @KARATSUBA_SLOP@ --- *
+/* --- @MPK_SLOP@ --- *
  *
  * The extra number of words required as scratch space by the Karatsuba
  * routines.  This is a (generous) guess, since the actual amount of space
  * required is proportional to the recursion depth.
  */
 
-#define KARATSUBA_SLOP 64
+#define MPK_SLOP 64
 
 /* --- @mpx_kmul@ --- *
  *
@@ -594,7 +644,7 @@ extern mpw mpx_udivn(mpw */*qv*/, mpw */*qvl*/,
  *		The destination and scratch buffers must be twice as large as
  *		the larger argument.  The scratch space must be twice as
  *		large as the larger argument, plus the magic number
- *		@KARATSUBA_SLOP@.
+ *		@MPK_SLOP@.
  */
 
 extern void mpx_kmul(mpw */*dv*/, mpw */*dvl*/,
@@ -618,7 +668,7 @@ extern void mpx_kmul(mpw */*dv*/, mpw */*dvl*/,
  *
  *		The destination must be twice as large as the argument.  The
  *		scratch space must be twice as large as the argument, plus
- *		the magic number @KARATSUBA_SLOP@.
+ *		the magic number @MPK_SLOP@.
  */
 
 extern void mpx_ksqr(mpw */*dv*/, mpw */*dvl*/,