tests/arith.pure.lisp

   1 ;;;; arithmetic tests with no side effects
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; While most of SBCL is derived from the CMU CL system, the test
   7 ;;;; files (like this one) were written from scratch after the fork
   8 ;;;; from CMU CL.
   9 ;;;;
  10 ;;;; This software is in the public domain and is provided with
  11 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
  12 ;;;; more information.
  13
  14 (cl:in-package :cl-user)
  15
  16 ;;; Once upon a time, in the process of porting CMUCL's SPARC backend
  17 ;;; to SBCL, multiplications were excitingly broken.  While it's
  18 ;;; unlikely that anything with such fundamental arithmetic errors as
  19 ;;; these are going to get this far, it's probably worth checking.
  20 (macrolet ((test (op res1 res2)
  21              `(progn
  22                (assert (= (,op 4 2) ,res1))
  23                (assert (= (,op 2 4) ,res2))
  24                (assert (= (funcall (compile nil (lambda (x y) (,op x y))) 4 2)
  25                         ,res1))
  26                (assert (= (funcall (compile nil (lambda (x y) (,op x y))) 2 4)
  27                         ,res2)))))
  28   (test + 6 6)
  29   (test - 2 -2)
  30   (test * 8 8)
  31   (test / 2 1/2)
  32   (test expt 16 16))
  33
  34 ;;; In a bug reported by Wolfhard Buss on cmucl-imp 2002-06-18 (BUG
  35 ;;; 184), sbcl didn't catch all divisions by zero, notably divisions
  36 ;;; of bignums and ratios by 0.  Fixed in sbcl-0.7.6.13.
  37 (assert (raises-error? (/ 2/3 0) division-by-zero))
  38 (assert (raises-error? (/ (1+ most-positive-fixnum) 0) division-by-zero))
  39
  40 ;;; In a bug reported by Raymond Toy on cmucl-imp 2002-07-18, (COERCE
  41 ;;; <RATIONAL> '(COMPLEX FLOAT)) was failing to return a complex
  42 ;;; float; a patch was given by Wolfhard Buss cmucl-imp 2002-07-19.
  43 (assert (= (coerce 1 '(complex float)) #c(1.0 0.0)))
  44 (assert (= (coerce 1/2 '(complex float)) #c(0.5 0.0)))
  45 (assert (= (coerce 1.0d0 '(complex float)) #c(1.0d0 0.0d0)))
  46
  47 ;;; COERCE also sometimes failed to verify that a particular coercion
  48 ;;; was possible (in particular coercing rationals to bounded float
  49 ;;; types.
  50 (assert (raises-error? (coerce 1 '(float 2.0 3.0)) type-error))
  51 (assert (raises-error? (coerce 1 '(single-float -1.0 0.0)) type-error))
  52 (assert (eql (coerce 1 '(single-float -1.0 2.0)) 1.0))
  53
  54 ;;; ANSI says MIN and MAX should signal TYPE-ERROR if any argument
  55 ;;; isn't REAL. SBCL 0.7.7 didn't in the 1-arg case. (reported as a
  56 ;;; bug in CMU CL on #lisp IRC by lrasinen 2002-09-01)
  57 #||
  58
  59 FIXME: These tests would be good to have. But although, in
  60 sbcl-0.7.7.2x, (NULL (IGNORE-ERRORS (MIN 1 #(1 2 3)))) returns T, the
  61 ASSERTion fails, probably in something related to bug #194.
  62
  63 (assert (null (ignore-errors (min '(1 2 3)))))
  64 (assert (= (min -1) -1))
  65 (assert (null (ignore-errors (min 1 #(1 2 3)))))
  66 (assert (= (min 10 11) 10))
  67 (assert (null (ignore-errors (min (find-package "CL") -5.0))))
  68 (assert (= (min 5.0 -3) -3))
  69 (assert (null (ignore-errors (max #c(4 3)))))
  70 (assert (= (max 0) 0))
  71 (assert (null (ignore-errors (max "MIX" 3))))
  72 (assert (= (max -1 10.0) 10.0))
  73 (assert (null (ignore-errors (max 3 #'max))))
  74 (assert (= (max -3 0) 0))
  75 ||#