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@@ -5,9 +5,47 @@ |
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(in-package #:bignum-tests)
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-(define-test hd-mult
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+(define-test hd-mult.same-size
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"Test bignum multiplier"
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(:tag :bignum-tests)
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+ ;; x and y are randomly generated 128 integers. No particular reason
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+ ;; for these values, except that they're bignums.
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+ (let ((x 248090201001762284446997112921270181259)
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+ (y 313102667534462314033767199170708979663)
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+ (prod 77677703722812705876871716049945873590003455155145426220435549433670954735717))
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+ ;; Verify the we get the right results for various signed values of x and y.
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+ (assert-equal prod (* x y))
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+ (assert-equal (- prod) (* (- x) y))
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+ (assert-equal (- prod) (* x (- y)))
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+ (assert-equal prod (* (- x) (- y)))
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+ ;; Nake sure it's commutative
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+ (assert-equal prod (* y x))
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+ (assert-equal (- prod) (* y (- x)))
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+ (assert-equal (- prod) (* (- y) x))
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+ (assert-equal prod (* (- y) (- x)))))
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+
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+(define-test hd-mult.diff-size
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+ "Test bignum multiplier"
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+ (:tag :bignum-tests)
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+ ;; x is a randomly generated bignum. y is a small bignum.
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+ (let ((x 248090201001762284446997112921270181259)
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+ (y (1+ most-positive-fixnum))
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+ (prod 133192412470079431258262755675409306410924638208))
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+ ;; Verify the we get the right results for various signed values of x and y.
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+ (assert-equal prod (* x y))
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+ (assert-equal (- prod) (* (- x) y))
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+ (assert-equal (- prod) (* x (- y)))
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+ (assert-equal prod (* (- x) (- y)))
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+ ;; Nake sure it's commutative
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+ (assert-equal prod (* y x))
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+ (assert-equal (- prod) (* y (- x)))
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+ (assert-equal (- prod) (* (- y) x))
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+ (assert-equal prod (* (- y) (- x)))))
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+
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+
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+(define-test hd-mult.random
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+ "Test bignum multiplier with random values"
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+ (:tag :bignum-tests)
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(let ((rng (kernel::make-random-object :state (kernel:init-random-state)
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:rand 0
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:cached-p nil))
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