1 ;;;; floating-point-related tests with no side effects
3 ;;;; This software is part of the SBCL system. See the README file for
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
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.
14 (cl:in-package :cl-user)
16 (dolist (ifnis (list (cons single-float-positive-infinity
17 single-float-negative-infinity)
18 (cons double-float-positive-infinity
19 double-float-negative-infinity)))
20 (destructuring-bind (+ifni . -ifni) ifnis
21 (assert (= (* +ifni 1) +ifni))
22 (assert (= (* +ifni -0.1) -ifni))
23 (assert (= (+ +ifni -0.1) +ifni))
24 (assert (= (- +ifni -0.1) +ifni))
25 (assert (= (sqrt +ifni) +ifni))
26 (assert (= (* -ifni -14) +ifni))
27 (assert (= (/ -ifni 0.1) -ifni))
28 (assert (= (/ -ifni 100/3) -ifni))
29 (assert (not (= +ifni -ifni)))
30 (assert (= -ifni -ifni))
31 (assert (not (= +ifni 100/3)))
32 (assert (not (= -ifni -1.0 -ifni)))
33 (assert (not (= -ifni -17/02 -ifni)))
34 (assert (< -ifni +ifni))
35 (assert (not (< +ifni 100)))
36 (assert (not (< +ifni 100.0)))
37 (assert (not (< +ifni -ifni)))
38 (assert (< 100 +ifni))
39 (assert (< 100.0 +ifni))
40 (assert (>= 100 -ifni))
41 (assert (not (<= 6/7 (* 3 -ifni))))
42 (assert (not (> +ifni +ifni)))))
44 ;;; ANSI: FLOAT-RADIX should signal an error if its argument is not a
47 ;;; (Peter Van Eynde's ansi-test suite caught this, and Eric Marsden
48 ;;; reported a fix for CMU CL, which was ported to sbcl-0.6.12.35.)
49 (assert (typep (nth-value 1 (ignore-errors (float-radix "notfloat")))
52 (assert (typep (nth-value 1 (ignore-errors
53 (funcall (fdefinition 'float-radix) "notfloat")))
56 ;;; Before 0.8.2.14 the cross compiler failed to work with
57 ;;; denormalized numbers
58 (when (subtypep 'single-float 'short-float)
59 (assert (eql least-positive-single-float least-positive-short-float)))
61 ;;; bug found by Paul Dietz: FFLOOR and similar did not work for integers
62 (let ((tests '(((ffloor -8 3) (-3.0 1))
63 ((fround -8 3) (-3.0 1))
64 ((ftruncate -8 3) (-2.0 -2))
65 ((fceiling -8 3) (-2.0 -2)))))
66 (loop for (exp res) in tests
67 for real-res = (multiple-value-list (eval exp))
68 do (assert (equal real-res res))))
70 ;;; bug 45b reported by PVE
71 (dolist (type '(short single double long))
72 (dolist (sign '(positive negative))
73 (let* ((name (find-symbol (format nil "LEAST-~A-~A-FLOAT"
76 (value (symbol-value name)))
77 (assert (zerop (/ value 2))))))
79 ;;; bug found by Paul Dietz: bad rounding on small floats
80 (assert (= (fround least-positive-short-float least-positive-short-float) 1.0))
82 ;;; bug found by Peter Seibel: scale-float was only accepting float
83 ;;; exponents, when it should accept all integers. (also bug #269)
84 (assert (= (multiple-value-bind (significand expt sign)
85 (integer-decode-float least-positive-double-float)
86 (* (scale-float (float significand 0.0d0) expt) sign))
87 least-positive-double-float))
88 (assert (= (multiple-value-bind (significand expt sign)
89 (decode-float least-positive-double-float)
90 (* (scale-float significand expt) sign))
91 least-positive-double-float))
92 (assert (= 0.0 (scale-float 1.0 most-negative-fixnum)))
93 (assert (= 0.0d0 (scale-float 1.0d0 (1- most-negative-fixnum))))
95 (with-test (:name (:scale-float-overflow :bug-372)
96 :fails-on '(or :ppc :darwin (and :x86 :openbsd))) ;; bug 372
98 (assert (raises-error? (scale-float 1.0 most-positive-fixnum)
99 floating-point-overflow))
100 (assert (raises-error? (scale-float 1.0d0 (1+ most-positive-fixnum))
101 floating-point-overflow))))
103 ;;; bug found by jsnell when nfroyd tried to implement better LOGAND
105 (assert (= (integer-decode-float (coerce -1756510900000000000
109 ;;; MISC.564: no out-of-line %ATAN2 for constant folding
115 (declare (optimize (speed 3) (safety 2) (debug 3) (space 0))
117 (phase (the (eql #c(1.0d0 2.0d0)) p1))))
121 ;;; More out of line functions (%COS, %SIN, %TAN) for constant folding,
122 ;;; reported by Mika Pihlajamäki
123 (funcall (compile nil '(lambda () (cos (tan (round 0))))))
124 (funcall (compile nil '(lambda () (sin (tan (round 0))))))
125 (funcall (compile nil '(lambda () (tan (tan (round 0))))))
127 (with-test (:name (:addition-overflow :bug-372)
128 :fails-on '(or :ppc :darwin (and :x86 (or :netbsd :openbsd))))
129 (assert (typep (nth-value
132 (sb-sys:without-interrupts
133 (loop repeat 2 summing most-positive-double-float)
135 'floating-point-overflow)))
137 ;;; On x86-64 generating complex floats on the stack failed an aver in
138 ;;; the compiler if the stack slot was the same as the one containing
139 ;;; the real part of the complex. The following expression was able to
140 ;;; trigger this in 0.9.5.62.
141 (with-test (:name :complex-float-stack)
142 (dolist (type '((complex double-float)
143 (complex single-float)))
145 `(lambda (x0 x1 x2 x3 x4 x5 x6 x7)
146 (declare (type ,type x0 x1 x2 x3 x4 x5 x6 x7))
155 (* (+ x0 x1 x2 x3) (+ x4 x5 x6 x7)
156 (+ x0 x2 x4 x6) (+ x1 x3 x5 x7)
157 (+ x0 x3 x4 x7) (+ x1 x2 x5 x6)
158 (+ x0 x1 x6 x7) (+ x2 x3 x4 x5)))))))
161 (with-test (:name :nan-comparisons
162 :fails-on '(or :sparc :mips))
163 (sb-int:with-float-traps-masked (:invalid)
164 (macrolet ((test (form)
165 (let ((nform (subst '(/ 0.0 0.0) 'nan form)))
167 (assert (eval ',nform))
168 (assert (eval `(let ((nan (/ 0.0 0.0)))
171 (compile nil `(lambda () ,',nform))))
173 (compile nil `(lambda (nan) ,',form))
176 (test (/= nan nan nan))
177 (test (/= 1.0 nan 2.0 nan))
178 (test (/= nan 1.0 2.0 nan))
179 (test (not (= nan 1.0)))
180 (test (not (= nan nan)))
181 (test (not (= nan nan nan)))
182 (test (not (= 1.0 nan)))
183 (test (not (= nan 1.0)))
184 (test (not (= 1.0 1.0 nan)))
185 (test (not (= 1.0 nan 1.0)))
186 (test (not (= nan 1.0 1.0)))
187 (test (not (>= nan nan)))
188 (test (not (>= nan 1.0)))
189 (test (not (>= 1.0 nan)))
190 (test (not (>= 1.0 nan 0.0)))
191 (test (not (>= 1.0 0.0 nan)))
192 (test (not (>= nan 1.0 0.0)))
193 (test (not (<= nan nan)))
194 (test (not (<= nan 1.0)))
195 (test (not (<= 1.0 nan)))
196 (test (not (<= 1.0 nan 2.0)))
197 (test (not (<= 1.0 2.0 nan)))
198 (test (not (<= nan 1.0 2.0)))
199 (test (not (< nan nan)))
200 (test (not (< -1.0 nan)))
201 (test (not (< nan 1.0)))
202 (test (not (> nan nan)))
203 (test (not (> -1.0 nan)))
204 (test (not (> nan 1.0))))))
206 (with-test (:name :log-int/double-accuracy)
207 ;; we used to use single precision for intermediate results
208 (assert (eql 2567.6046442221327d0
209 (log (loop for n from 1 to 1000 for f = 1 then (* f n)
213 (assert (eql (log 123123123.0d0 10) (log 123123123 10.0d0))))
215 (with-test (:name :log-base-zero-return-type)
216 (assert (eql 0.0f0 (log 123 (eval 0))))
217 (assert (eql 0.0d0 (log 123.0d0 (eval 0))))
218 (assert (eql 0.0d0 (log 123 (eval 0.0d0))))
219 (let ((f (compile nil '(lambda (x y)
220 (declare (optimize speed))
224 (single-float (log x y))
225 (double-float (log x y))))
228 (single-float (log x y))
229 (double-float (log x y)))))))))
230 (assert (eql 0.0f0 (funcall f 123.0 0.0)))
231 (assert (eql 0.0d0 (funcall f 123.0d0 0.0)))
232 (assert (eql 0.0d0 (funcall f 123.0d0 0.0d0)))
233 (assert (eql 0.0d0 (funcall f 123.0 0.0d0)))))