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fx{+,-,*}/carry now chech that all their arguments are fixnums 

(causes segfaults when unchecked).
This commit is contained in:
Abdulaziz Ghuloum 2009-08-24 15:22:51 +03:00
parent 402c4aa468
commit 8bd012bfeb
2 changed files with 11 additions and 4 deletions
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13
scheme/ikarus.fixnums.ss
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@ -368,19 +368,26 @@
(die 'fxmax "not a fixnum" z)))]
[(x) (if (fixnum? x) x (die 'fxmax "not a fixnum" x))]))
(define (fx*/carry fx1 fx2 fx3)
(define-syntax define-fx
(syntax-rules ()
[(_ (name arg* ...) body)
(define (name arg* ...)
(unless (fixnum? arg*) (die 'name "not a fixnum" arg*)) ...
body)]))
(define-fx (fx*/carry fx1 fx2 fx3)
(let ([s0 ($fx+ ($fx* fx1 fx2) fx3)])
(values
s0
(sra (+ (* fx1 fx2) (- fx3 s0)) (fixnum-width)))))
(define (fx+/carry fx1 fx2 fx3)
(define-fx (fx+/carry fx1 fx2 fx3)
(let ([s0 ($fx+ ($fx+ fx1 fx2) fx3)])
(values
s0
(sra (+ (+ fx1 fx2) (- fx3 s0)) (fixnum-width)))))
(define (fx-/carry fx1 fx2 fx3)
(define-fx (fx-/carry fx1 fx2 fx3)
(let ([s0 ($fx- ($fx- fx1 fx2) fx3)])
(values
s0

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scheme/last-revision
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@ -1 +1 @@
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