;;;; bit-operations.test --- bitwise operations on numbers -*- scheme -*-
-;;;; Copyright (C) 2000 Free Software Foundation, Inc.
+;;;; Copyright (C) 2000, 2001, 2003, 2006, 2009, 2010 Free Software Foundation, Inc.
;;;;
-;;;; This program is free software; you can redistribute it and/or modify
-;;;; it under the terms of the GNU General Public License as published by
-;;;; the Free Software Foundation; either version 2, or (at your option)
-;;;; any later version.
-;;;;
-;;;; This program is distributed in the hope that it will be useful,
+;;;; This 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.
+;;;;
+;;;; This 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 General Public License for more details.
-;;;;
-;;;; You should have received a copy of the GNU General Public License
-;;;; along with this software; see the file COPYING. If not, write to
-;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
-;;;; Boston, MA 02111-1307 USA
-;;;;
-;;;; As a special exception, the Free Software Foundation gives permission
-;;;; for additional uses of the text contained in its release of GUILE.
-;;;;
-;;;; The exception is that, if you link the GUILE library with other files
-;;;; to produce an executable, this does not by itself cause the
-;;;; resulting executable to be covered by the GNU General Public License.
-;;;; Your use of that executable is in no way restricted on account of
-;;;; linking the GUILE library code into it.
-;;;;
-;;;; This exception does not however invalidate any other reasons why
-;;;; the executable file might be covered by the GNU General Public License.
-;;;;
-;;;; This exception applies only to the code released by the
-;;;; Free Software Foundation under the name GUILE. If you copy
-;;;; code from other Free Software Foundation releases into a copy of
-;;;; GUILE, as the General Public License permits, the exception does
-;;;; not apply to the code that you add in this way. To avoid misleading
-;;;; anyone as to the status of such modified files, you must delete
-;;;; this exception notice from them.
-;;;;
-;;;; If you write modifications of your own for GUILE, it is your choice
-;;;; whether to permit this exception to apply to your modifications.
-;;;; If you do not wish that, delete this exception notice.
+;;;; 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 this library; if not, write to the Free Software
+;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-(use-modules (ice-9 documentation))
+(define-module (test-bit-operations)
+ :use-module (test-suite lib)
+ :use-module (ice-9 documentation))
;;;
(define (documented? object)
(not (not (object-documentation object))))
-(define fixnum-bit 30)
+(define fixnum-bit
+ (inexact->exact (round (+ (/ (log (+ most-positive-fixnum 1)) (log 2)) 1))))
+
(define fixnum-min most-negative-fixnum)
(define fixnum-max most-positive-fixnum)
(list fixnum-min 0 (+ fixnum-bit -1) (ash 0 (- fixnum-bit 1)))
(list fixnum-min 1 (+ fixnum-bit 0) (ash 1 (- fixnum-bit 2)))
(list fixnum-min 2 (+ fixnum-bit 1) (ash 3 (- fixnum-bit 3)))
- (list fixnum-min (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -3) (- (ash 1 (- fixnum-bit 1)) 2))
- (list fixnum-min (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -2) (- (ash 1 (- fixnum-bit 1)) 1))
- (list fixnum-min (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit -1) (- (ash 1 (- fixnum-bit 1)) 1))
- (list fixnum-min (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 0) (- (ash 1 (- fixnum-bit 1)) 1))))
+ (list fixnum-min (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -3)
+ (- (ash 1 (- fixnum-bit 1)) 2))
+ (list fixnum-min (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -2)
+ (- (ash 1 (- fixnum-bit 1)) 1))
+ (list fixnum-min (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit -1)
+ (- (ash 1 (- fixnum-bit 1)) 1))
+ (list fixnum-min (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 0)
+ (- (ash 1 (- fixnum-bit 1)) 1))))
(run-tests
(lambda (a b c d)
(list fixnum-min 0 (+ fixnum-bit 0) (ash 1 (- fixnum-bit 1)))
(list fixnum-min 1 (+ fixnum-bit 1) (ash 3 (- fixnum-bit 2)))
(list fixnum-min 2 (+ fixnum-bit 2) (ash 7 (- fixnum-bit 3)))
- (list fixnum-min (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -2) (- (ash 1 fixnum-bit) 2))
- (list fixnum-min (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -1) (- (ash 1 fixnum-bit) 1))
- (list fixnum-min (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 0) (- (ash 1 fixnum-bit) 1))
- (list fixnum-min (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 1) (- (ash 1 fixnum-bit) 1))))
+ (list fixnum-min (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -2)
+ (- (ash 1 fixnum-bit) 2))
+ (list fixnum-min (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -1)
+ (- (ash 1 fixnum-bit) 1))
+ (list fixnum-min (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 0)
+ (- (ash 1 fixnum-bit) 1))
+ (list fixnum-min (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 1)
+ (- (ash 1 fixnum-bit) 1))))
(run-tests
(lambda (a b c d)
(list fixnum-min 0 (+ fixnum-bit 1) (ash 3 (- fixnum-bit 1)))
(list fixnum-min 1 (+ fixnum-bit 2) (ash 7 (- fixnum-bit 2)))
(list fixnum-min 2 (+ fixnum-bit 3) (ash 15 (- fixnum-bit 3)))
- (list fixnum-min (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -1) (- (ash 1 (+ fixnum-bit 1)) 2))
- (list fixnum-min (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit 0) (- (ash 1 (+ fixnum-bit 1)) 1))
- (list fixnum-min (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 1) (- (ash 1 (+ fixnum-bit 1)) 1))
- (list fixnum-min (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 2) (- (ash 1 (+ fixnum-bit 1)) 1)))))
+ (list fixnum-min (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -1)
+ (- (ash 1 (+ fixnum-bit 1)) 2))
+ (list fixnum-min (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit 0)
+ (- (ash 1 (+ fixnum-bit 1)) 1))
+ (list fixnum-min (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 1)
+ (- (ash 1 (+ fixnum-bit 1)) 1))
+ (list fixnum-min (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 2)
+ (- (ash 1 (+ fixnum-bit 1)) 1)))))
(with-test-prefix "extract from fixnum-min - 1"
(lambda (a b c d)
(= (bit-extract a b c) d))
(list
- (list (- fixnum-min 1) 0 (+ fixnum-bit -1) (- (ash 1 (- fixnum-bit 1)) 1 (ash 0 (- fixnum-bit 1))))
- (list (- fixnum-min 1) 1 (+ fixnum-bit 0) (- (ash 1 (- fixnum-bit 1)) 1 (ash 1 (- fixnum-bit 2))))
- (list (- fixnum-min 1) 2 (+ fixnum-bit 1) (- (ash 1 (- fixnum-bit 1)) 1 (ash 1 (- fixnum-bit 3))))
- (list (- fixnum-min 1) (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -3) (- (ash 1 (- fixnum-bit 1)) 3))
- (list (- fixnum-min 1) (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -2) (- (ash 1 (- fixnum-bit 1)) 2))
- (list (- fixnum-min 1) (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit -1) (- (ash 1 (- fixnum-bit 1)) 1))
- (list (- fixnum-min 1) (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 0) (- (ash 1 (- fixnum-bit 1)) 1))))
+ (list (- fixnum-min 1) 0 (+ fixnum-bit -1)
+ (- (ash 1 (- fixnum-bit 1)) 1 (ash 0 (- fixnum-bit 1))))
+ (list (- fixnum-min 1) 1 (+ fixnum-bit 0)
+ (- (ash 1 (- fixnum-bit 1)) 1 (ash 1 (- fixnum-bit 2))))
+ (list (- fixnum-min 1) 2 (+ fixnum-bit 1)
+ (- (ash 1 (- fixnum-bit 1)) 1 (ash 1 (- fixnum-bit 3))))
+ (list (- fixnum-min 1) (+ fixnum-bit -2)
+ (+ fixnum-bit fixnum-bit -3) (- (ash 1 (- fixnum-bit 1)) 3))
+ (list (- fixnum-min 1) (+ fixnum-bit -1)
+ (+ fixnum-bit fixnum-bit -2) (- (ash 1 (- fixnum-bit 1)) 2))
+ (list (- fixnum-min 1) (+ fixnum-bit 0)
+ (+ fixnum-bit fixnum-bit -1) (- (ash 1 (- fixnum-bit 1)) 1))
+ (list (- fixnum-min 1) (+ fixnum-bit 1)
+ (+ fixnum-bit fixnum-bit 0) (- (ash 1 (- fixnum-bit 1)) 1))))
(run-tests
(lambda (a b c d)
(lambda (a b c d)
(= (bit-extract a b c) d))
(list
- (list (- fixnum-min 1) 0 (+ fixnum-bit 0) (- (ash 1 fixnum-bit) 1 (ash 1 (- fixnum-bit 1))))
- (list (- fixnum-min 1) 1 (+ fixnum-bit 1) (- (ash 1 fixnum-bit) 1 (ash 1 (- fixnum-bit 2))))
- (list (- fixnum-min 1) 2 (+ fixnum-bit 2) (- (ash 1 fixnum-bit) 1 (ash 1 (- fixnum-bit 3))))
- (list (- fixnum-min 1) (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -2) (- (ash 1 fixnum-bit) 3))
- (list (- fixnum-min 1) (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -1) (- (ash 1 fixnum-bit) 2))
- (list (- fixnum-min 1) (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 0) (- (ash 1 fixnum-bit) 1))
- (list (- fixnum-min 1) (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 1) (- (ash 1 fixnum-bit) 1))))
+ (list (- fixnum-min 1) 0 (+ fixnum-bit 0)
+ (- (ash 1 fixnum-bit) 1 (ash 1 (- fixnum-bit 1))))
+ (list (- fixnum-min 1) 1 (+ fixnum-bit 1)
+ (- (ash 1 fixnum-bit) 1 (ash 1 (- fixnum-bit 2))))
+ (list (- fixnum-min 1) 2 (+ fixnum-bit 2)
+ (- (ash 1 fixnum-bit) 1 (ash 1 (- fixnum-bit 3))))
+ (list (- fixnum-min 1) (+ fixnum-bit -2)
+ (+ fixnum-bit fixnum-bit -2) (- (ash 1 fixnum-bit) 3))
+ (list (- fixnum-min 1) (+ fixnum-bit -1)
+ (+ fixnum-bit fixnum-bit -1) (- (ash 1 fixnum-bit) 2))
+ (list (- fixnum-min 1) (+ fixnum-bit 0)
+ (+ fixnum-bit fixnum-bit 0) (- (ash 1 fixnum-bit) 1))
+ (list (- fixnum-min 1) (+ fixnum-bit 1)
+ (+ fixnum-bit fixnum-bit 1) (- (ash 1 fixnum-bit) 1))))
(run-tests
(lambda (a b c d)
(lambda (a b c d)
(= (bit-extract a b c) d))
(list
- (list (- fixnum-min 1) 0 (+ fixnum-bit 1) (- (ash 1 (+ fixnum-bit 1)) 1 (ash 1 (- fixnum-bit 1))))
- (list (- fixnum-min 1) 1 (+ fixnum-bit 2) (- (ash 1 (+ fixnum-bit 1)) 1 (ash 1 (- fixnum-bit 2))))
- (list (- fixnum-min 1) 2 (+ fixnum-bit 3) (- (ash 1 (+ fixnum-bit 1)) 1 (ash 1 (- fixnum-bit 3))))
- (list (- fixnum-min 1) (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -1) (- (ash 1 (+ fixnum-bit 1)) 3))
- (list (- fixnum-min 1) (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit 0) (- (ash 1 (+ fixnum-bit 1)) 2))
- (list (- fixnum-min 1) (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 1) (- (ash 1 (+ fixnum-bit 1)) 1))
- (list (- fixnum-min 1) (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 2) (- (ash 1 (+ fixnum-bit 1)) 1))))))
+ (list (- fixnum-min 1) 0 (+ fixnum-bit 1)
+ (- (ash 1 (+ fixnum-bit 1)) 1 (ash 1 (- fixnum-bit 1))))
+ (list (- fixnum-min 1) 1 (+ fixnum-bit 2)
+ (- (ash 1 (+ fixnum-bit 1)) 1 (ash 1 (- fixnum-bit 2))))
+ (list (- fixnum-min 1) 2 (+ fixnum-bit 3)
+ (- (ash 1 (+ fixnum-bit 1)) 1 (ash 1 (- fixnum-bit 3))))
+ (list (- fixnum-min 1) (+ fixnum-bit -2)
+ (+ fixnum-bit fixnum-bit -1) (- (ash 1 (+ fixnum-bit 1)) 3))
+ (list (- fixnum-min 1) (+ fixnum-bit -1)
+ (+ fixnum-bit fixnum-bit 0) (- (ash 1 (+ fixnum-bit 1)) 2))
+ (list (- fixnum-min 1) (+ fixnum-bit 0)
+ (+ fixnum-bit fixnum-bit 1) (- (ash 1 (+ fixnum-bit 1)) 1))
+ (list (- fixnum-min 1) (+ fixnum-bit 1)
+ (+ fixnum-bit fixnum-bit 2) (- (ash 1 (+ fixnum-bit 1)) 1))))))
+
+(with-test-prefix "bitshifts on word boundaries"
+ (pass-if (= (ash 1 32) 4294967296))
+ (pass-if (= (ash 1 64) 18446744073709551616)))
HCoop / bpt / guile.git / blobdiff