From 1eb8131045f497cb53818f6458a70a263b60489a Mon Sep 17 00:00:00 2001 From: rtoy <rtoy> Date: Mon, 23 Aug 2004 16:15:24 +0000 Subject: [PATCH] Need actual function for vm::ash-mod32 support for modular ash with positive and negative shifts. --- code/numbers.lisp | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/code/numbers.lisp b/code/numbers.lisp index 11e776c86..6093e5900 100644 --- a/code/numbers.lisp +++ b/code/numbers.lisp @@ -5,7 +5,7 @@ ;;; Carnegie Mellon University, and has been placed in the public domain. ;;; (ext:file-comment - "$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/code/numbers.lisp,v 1.58 2004/04/10 04:51:03 rtoy Exp $") + "$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/code/numbers.lisp,v 1.59 2004/08/23 16:15:24 rtoy Exp $") ;;; ;;; ********************************************************************** ;;; @@ -1541,3 +1541,10 @@ significant bit of INTEGER is bit 0." (type (integer 0 31) count)) (bignum::%ashl (ldb (byte 32 0) integer) count)) +#+modular-arith +(defun vm::ash-mod32 (integer count) + (declare (type integer integer) + (type (integer -31 31) count)) + (if (minusp count) + (bignum::%digit-logical-shift-right (ldb (byte 32 0) integer) (- count)) + (bignum::%ashl (ldb (byte 32 0) integer) count))) -- GitLab