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Provide typed version fxpopcount functions #1425

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Provide typed version fxpopcount functions #1425

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11 changes: 11 additions & 0 deletions typed-racket-lib/typed-racket/base-env/base-env-numeric.rkt
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Original file line number Diff line number Diff line change
Expand Up @@ -420,6 +420,13 @@
(-> -NonPosInt -Int -NonPosFixnum)
(binop -Int -Fixnum))))

(define fxpopcount-type
(lambda ()
(fx-from-cases
(-Nat . -> . -NonNegFixnum)
(-NonNegFixnum . -> . -NonNegFixnum)
(-Int . -> . -Fixnum))))

;; A bit of machinery to allow floating point operations to be abstracted over double/extended
;; floating point types without repetition.
(define-syntax (define-fl-type-lambda stx)
Expand Down Expand Up @@ -1946,6 +1953,10 @@
[fxlshift (fxlshift-type)]
[fxrshift (fxrshift-type)]

[fxpopcount (fxpopcount-type)]
[fxpopcount16 (fxpopcount-type)]
[fxpopcount32 (fxpopcount-type)]

[fx= (fx=-type)]
[fx< (fx<-type)]
[fx> (fx>-type)]
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3 changes: 3 additions & 0 deletions typed-racket-test/succeed/fixnum.rkt
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Expand Up @@ -38,3 +38,6 @@
(check equal? (fxmin 3 2) 2)
(check equal? (fxmax 3 4) 4)

(check equal? (fxpopcount #x0fffffffffffffff) 60)
(check equal? (fxpopcount32 #xffffffff) 32)
(check equal? (fxpopcount16 #xffff) 16)
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