[Sbcl-commits] CVS: sbcl NEWS,1.400.2.3,1.400.2.4 version.lisp-expr,1.1230.2.5,1.1230.2.6

[Christophe R. <cr...@us...>]

Update of /cvsroot/sbcl/sbcl
In directory sc8-pr-cvs1:/tmp/cvs-serv30195

Modified Files:
      Tag: modular_arithmetic_branch
	NEWS version.lisp-expr 
Log Message:
0.8.3.45.modular6:
	Implement 64-bit modular arithmetic for alpha.
	... can't simplify BIGNUM-LOGNOT or 32BIT-LOGICAL-FOO here,
		because modular arithmetic is 64-bit, duh :-)
	... it would be nice to compile (logand ... (1- (ash 1 32)))
		more efficiently than we currently do; currently we
		load up a 32-bit quantity into a register, followed
		by an and instruction; however, we should be able
		simply to do mskll reg, 4, reg.
	I think this works.  Simple testing shows that it seems to work.
	But see also CSR sbcl-devel 2003-09-12, because there are a number
	of nasty surprises lurking in the depths of this backend.


Index: NEWS
===================================================================
RCS file: /cvsroot/sbcl/sbcl/NEWS,v
retrieving revision 1.400.2.3
retrieving revision 1.400.2.4
diff -u -d -r1.400.2.3 -r1.400.2.4
--- NEWS	11 Sep 2003 16:04:24 -0000	1.400.2.3
+++ NEWS	12 Sep 2003 16:53:39 -0000	1.400.2.4
@@ -2031,7 +2031,9 @@
     simple-base-strings and simple-bit-vectors is improved.
   * optimization: the optimization of 32-bit logical and arithmetic
     functions introduced in version 0.8.3 on the x86 has been
-    implemented on the mips, ppc and sparc platforms.
+    implemented on the mips, ppc and sparc platforms; an
+    implementation of the same facility, but for 64-bit arithmetic,
+    has been added for the alpha.
   * microoptimization: the compiler is better able to make use of the
     x86 LEA instruction for multiplication by constants.
   * bug fix: in some situations compiler did not report usage of

Index: version.lisp-expr
===================================================================
RCS file: /cvsroot/sbcl/sbcl/version.lisp-expr,v
retrieving revision 1.1230.2.5
retrieving revision 1.1230.2.6
diff -u -d -r1.1230.2.5 -r1.1230.2.6
--- version.lisp-expr	11 Sep 2003 16:04:24 -0000	1.1230.2.5
+++ version.lisp-expr	12 Sep 2003 16:53:39 -0000	1.1230.2.6
@@ -17,4 +17,4 @@
 ;;; checkins which aren't released. (And occasionally for internal
 ;;; versions, especially for internal versions off the main CVS
 ;;; branch, it gets hairier, e.g. "0.pre7.14.flaky4.13".)
-"0.8.3.45.modular5"
+"0.8.3.45.modular6"