diff options
Diffstat (limited to 'test-suite/tests/bit-operations.test')
-rw-r--r-- | test-suite/tests/bit-operations.test | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/test-suite/tests/bit-operations.test b/test-suite/tests/bit-operations.test new file mode 100644 index 000000000..e7da5712a --- /dev/null +++ b/test-suite/tests/bit-operations.test @@ -0,0 +1,368 @@ +;;;; bit-operations.test --- bitwise operations on numbers -*- scheme -*- +;;;; Copyright (C) 2000, 2001, 2003, 2006, 2009, 2010 Free Software Foundation, Inc. +;;;; +;;;; 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 +;;;; 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 + +(define-module (test-bit-operations) + :use-module (test-suite lib) + :use-module (ice-9 documentation)) + + +;;; +;;; miscellaneous +;;; + +(define (run-tests name-proc test-proc arg-sets) + (for-each + (lambda (arg-set) + (pass-if (apply name-proc arg-set) + (apply test-proc arg-set))) + arg-sets)) + +(define (documented? object) + (not (not (object-documentation object)))) + +(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) + +(with-test-prefix "bit-extract" + + (pass-if "documented?" + (documented? bit-extract)) + + (with-test-prefix "extract from zero" + + (run-tests + (lambda (a b c d) + (string-append "single bit " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list 0 0 1 0) + (list 0 1 2 0) + (list 0 (+ fixnum-bit -2) (+ fixnum-bit -1) 0) + (list 0 (+ fixnum-bit -1) (+ fixnum-bit 0) 0) + (list 0 (+ fixnum-bit 0) (+ fixnum-bit 1) 0) + (list 0 (+ fixnum-bit 1) (+ fixnum-bit 2) 0))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit - 1 bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list 0 0 (+ fixnum-bit -1) 0) + (list 0 1 (+ fixnum-bit 0) 0) + (list 0 2 (+ fixnum-bit 1) 0) + (list 0 (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -3) 0) + (list 0 (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -2) 0) + (list 0 (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit -1) 0) + (list 0 (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 0) 0))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list 0 0 (+ fixnum-bit 0) 0) + (list 0 1 (+ fixnum-bit 1) 0) + (list 0 2 (+ fixnum-bit 2) 0) + (list 0 (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -2) 0) + (list 0 (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -1) 0) + (list 0 (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 0) 0) + (list 0 (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 1) 0))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit + 1 bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list 0 0 (+ fixnum-bit 1) 0) + (list 0 1 (+ fixnum-bit 2) 0) + (list 0 2 (+ fixnum-bit 3) 0) + (list 0 (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -1) 0) + (list 0 (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit 0) 0) + (list 0 (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 1) 0) + (list 0 (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 2) 0)))) + + (with-test-prefix "extract from fixnum-max" + + (run-tests + (lambda (a b c d) + (string-append "single bit " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list fixnum-max 0 1 1) + (list fixnum-max 1 2 1) + (list fixnum-max (+ fixnum-bit -2) (+ fixnum-bit -1) 1) + (list fixnum-max (+ fixnum-bit -1) (+ fixnum-bit 0) 0) + (list fixnum-max (+ fixnum-bit 0) (+ fixnum-bit 1) 0) + (list fixnum-max (+ fixnum-bit 1) (+ fixnum-bit 2) 0))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit - 1 bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list fixnum-max 0 (+ fixnum-bit -1) (ash fixnum-max 0)) + (list fixnum-max 1 (+ fixnum-bit 0) (ash fixnum-max -1)) + (list fixnum-max 2 (+ fixnum-bit 1) (ash fixnum-max -2)) + (list fixnum-max (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -3) 1) + (list fixnum-max (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -2) 0) + (list fixnum-max (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit -1) 0) + (list fixnum-max (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 0) 0))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list fixnum-max 0 (+ fixnum-bit 0) (ash fixnum-max 0)) + (list fixnum-max 1 (+ fixnum-bit 1) (ash fixnum-max -1)) + (list fixnum-max 2 (+ fixnum-bit 2) (ash fixnum-max -2)) + (list fixnum-max (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -2) 1) + (list fixnum-max (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -1) 0) + (list fixnum-max (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 0) 0) + (list fixnum-max (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 1) 0))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit + 1 bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list fixnum-max 0 (+ fixnum-bit 1) (ash fixnum-max 0)) + (list fixnum-max 1 (+ fixnum-bit 2) (ash fixnum-max -1)) + (list fixnum-max 2 (+ fixnum-bit 3) (ash fixnum-max -2)) + (list fixnum-max (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -1) 1) + (list fixnum-max (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit 0) 0) + (list fixnum-max (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 1) 0) + (list fixnum-max (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 2) 0)))) + + (with-test-prefix "extract from fixnum-max + 1" + + (run-tests + (lambda (a b c d) + (string-append "single bit " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list (+ fixnum-max 1) 0 1 0) + (list (+ fixnum-max 1) 1 2 0) + (list (+ fixnum-max 1) (+ fixnum-bit -2) (+ fixnum-bit -1) 0) + (list (+ fixnum-max 1) (+ fixnum-bit -1) (+ fixnum-bit 0) 1) + (list (+ fixnum-max 1) (+ fixnum-bit 0) (+ fixnum-bit 1) 0) + (list (+ fixnum-max 1) (+ fixnum-bit 1) (+ fixnum-bit 2) 0))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit - 1 bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list (+ fixnum-max 1) 0 (+ fixnum-bit -1) (ash 0 (- fixnum-bit 1))) + (list (+ fixnum-max 1) 1 (+ fixnum-bit 0) (ash 1 (- fixnum-bit 2))) + (list (+ fixnum-max 1) 2 (+ fixnum-bit 1) (ash 1 (- fixnum-bit 3))) + (list (+ fixnum-max 1) (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -3) 2) + (list (+ fixnum-max 1) (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -2) 1) + (list (+ fixnum-max 1) (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit -1) 0) + (list (+ fixnum-max 1) (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 0) 0))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list (+ fixnum-max 1) 0 (+ fixnum-bit 0) (ash 1 (- fixnum-bit 1))) + (list (+ fixnum-max 1) 1 (+ fixnum-bit 1) (ash 1 (- fixnum-bit 2))) + (list (+ fixnum-max 1) 2 (+ fixnum-bit 2) (ash 1 (- fixnum-bit 3))) + (list (+ fixnum-max 1) (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -2) 2) + (list (+ fixnum-max 1) (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit -1) 1) + (list (+ fixnum-max 1) (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 0) 0) + (list (+ fixnum-max 1) (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 1) 0))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit + 1 bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list (+ fixnum-max 1) 0 (+ fixnum-bit 1) (ash 1 (- fixnum-bit 1))) + (list (+ fixnum-max 1) 1 (+ fixnum-bit 2) (ash 1 (- fixnum-bit 2))) + (list (+ fixnum-max 1) 2 (+ fixnum-bit 3) (ash 1 (- fixnum-bit 3))) + (list (+ fixnum-max 1) (+ fixnum-bit -2) (+ fixnum-bit fixnum-bit -1) 2) + (list (+ fixnum-max 1) (+ fixnum-bit -1) (+ fixnum-bit fixnum-bit 0) 1) + (list (+ fixnum-max 1) (+ fixnum-bit 0) (+ fixnum-bit fixnum-bit 1) 0) + (list (+ fixnum-max 1) (+ fixnum-bit 1) (+ fixnum-bit fixnum-bit 2) 0)))) + + (with-test-prefix "extract from fixnum-min" + + (run-tests + (lambda (a b c d) + (string-append "single bit " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list fixnum-min 0 1 0) + (list fixnum-min 1 2 0) + (list fixnum-min (+ fixnum-bit -2) (+ fixnum-bit -1) 0) + (list fixnum-min (+ fixnum-bit -1) (+ fixnum-bit 0) 1) + (list fixnum-min (+ fixnum-bit 0) (+ fixnum-bit 1) 1) + (list fixnum-min (+ fixnum-bit 1) (+ fixnum-bit 2) 1))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit - 1 bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (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)))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (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)))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit + 1 bits starting at " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (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))))) + + (with-test-prefix "extract from fixnum-min - 1" + + (run-tests + (lambda (a b c d) + (string-append "single bit " (number->string b))) + (lambda (a b c d) + (= (bit-extract a b c) d)) + (list + (list (- fixnum-min 1) 0 1 1) + (list (- fixnum-min 1) 1 2 1) + (list (- fixnum-min 1) (+ fixnum-bit -2) (+ fixnum-bit -1) 1) + (list (- fixnum-min 1) (+ fixnum-bit -1) (+ fixnum-bit 0) 0) + (list (- fixnum-min 1) (+ fixnum-bit 0) (+ fixnum-bit 1) 1) + (list (- fixnum-min 1) (+ fixnum-bit 1) (+ fixnum-bit 2) 1))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit - 1 bits starting at " (number->string b))) + (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)))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit bits starting at " (number->string b))) + (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)))) + + (run-tests + (lambda (a b c d) + (string-append "fixnum-bit + 1 bits starting at " (number->string b))) + (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)))))) + +(with-test-prefix "bitshifts on word boundaries" + (pass-if (= (ash 1 32) 4294967296)) + (pass-if (= (ash 1 64) 18446744073709551616))) |