* reverted to previous broken version of ratnum->flonum.
This commit is contained in:
Abdulaziz Ghuloum
parent
7e1c6001eb
commit
87d1cd5ad1
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@ -27,18 +27,19 @@
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flsin flcos fltan flasin flacos flatan fleven? flodd?
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flfloor flceiling flnumerator fldenominator flexp fllog
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flinteger? flonum-bytes flnan? flfinite? flinfinite?
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flexpt)
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flexpt $flround flround)
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(import
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(ikarus system $bytevectors)
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(ikarus system $fx)
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(only (ikarus system $flonums) $fl>= $flonum-sbe)
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(ikarus system $bignums)
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(except (ikarus system $flonums) $flonum-rational? $flonum-integer?)
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(except (ikarus system $flonums) $flonum-rational?
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$flonum-integer? $flround)
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(except (ikarus) inexact->exact exact flpositive? flabs fixnum->flonum
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flsin flcos fltan flasin flacos flatan fleven? flodd?
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flfloor flceiling flnumerator fldenominator flexp fllog
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flexpt flinteger? flonum-parts flonum-bytes flnan? flfinite?
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flinfinite?))
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flinfinite? flround))
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(define (flonum-bytes f)
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(unless (flonum? f)
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@ -100,6 +101,15 @@
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#f]
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[else ($fl= x ($flround x))])))
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(define ($flround x)
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(foreign-call "ikrt_fl_round" x ($make-flonum)))
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(define (flround x)
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(if (flonum? x)
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($flround x)
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(error 'flround "not a flonum" x)))
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(module ($flonum->integer $flonum->exact)
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(define ($flonum-signed-mantissa x)
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(let ([b0 ($flonum-u8-ref x 0)])
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@ -129,10 +139,16 @@
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($flonum-signed-mantissa x)
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(- be 1075))]
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[else
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(let ([x0 ($fl* x 5e-324)])
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(let-values ([(pos? be m) (flonum-parts x)])
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(cond
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[($fl= x ($fl/ x0 5e-324)) ;;; x == round(x)
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($flonum-signed-mantissa x0)]
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[(<= 1 be 2046) ; normalized flonum
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(let ([n (+ m (expt 2 52))]
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[d (expt 2 (- be 1075))])
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(let-values ([(q r) (quotient+remainder n d)])
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(if (= r 0)
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(if pos? q (- q))
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#f)))]
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[(= be 0) (if (= m 0) 0 #f)]
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[else #f]))]))))
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(define ($flonum->exact x)
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(let ([sbe ($flonum-sbe x)])
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@ -144,34 +160,34 @@
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($flonum-signed-mantissa x)
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(- be 1075))]
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[else
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(let* ([x0 ($fl* x 5e-324)]
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[x1 ($fl/ x0 5e-324)])
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;;; this really needs to get optimized.
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(let-values ([(pos? be m) (flonum-parts x)])
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(cond
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[($fl= x x1) ;;; x == round(x)
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($flonum-signed-mantissa x0)]
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[($fx= be 0) ;;; denormal
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(/ ($flonum-signed-mantissa x)
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(bitwise-arithmetic-shift-left 1 1074))]
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[else ;;; x has a fraction
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(let ([v ($flonum-signed-mantissa x)])
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(let ([bits (- 1075 be)])
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(let ([int (bitwise-arithmetic-shift-right v bits)]
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[frac
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(let ([e (bitwise-arithmetic-shift-left 1 bits)])
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(/ (bitwise-and v (- e 1)) e))])
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(+ int frac))))]))])))))
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[(<= 1 be 2046) ; normalized flonum
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(* (if pos? 1 -1)
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(* (+ m (expt 2 52)) (expt 2 (- be 1075))))]
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[(= be 0)
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(* (if pos? 1 -1)
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(* m (expt 2 -1074)))]
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[else #f]))])))))
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;;;OLD (define ($flonum->exact x)
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;;;OLD ;;; this really needs to get optimized.
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;;;OLD (let-values ([(pos? be m) (flonum-parts x)])
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;;;OLD (cond
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;;;OLD [(<= 1 be 2046) ; normalized flonum
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;;;OLD (* (if pos? 1 -1)
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;;;OLD (* (+ m (expt 2 52)) (expt 2 (- be 1075))))]
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;;;OLD [(= be 0)
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;;;OLD (* (if pos? 1 -1)
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;;;OLD (* m (expt 2 -1074)))]
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;;;OLD [else #f])))
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;;; INCORRECT (define ($flonum->exact x)
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;;; INCORRECT (let* ([x0 ($fl* x 5e-324)]
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;;; INCORRECT [x1 ($fl/ x0 5e-324)])
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;;; INCORRECT (cond
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;;; INCORRECT [($fl= x x1) ;;; x == round(x)
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;;; INCORRECT ($flonum-signed-mantissa x0)]
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;;; INCORRECT [($fx= be 0) ;;; denormal
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;;; INCORRECT (/ ($flonum-signed-mantissa x)
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;;; INCORRECT (bitwise-arithmetic-shift-left 1 1074))]
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;;; INCORRECT [else ;;; x has a fraction
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;;; INCORRECT (let ([v ($flonum-signed-mantissa x)])
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;;; INCORRECT (let ([bits (- 1075 be)])
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;;; INCORRECT (let ([int (bitwise-arithmetic-shift-right v bits)]
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;;; INCORRECT [frac
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;;; INCORRECT (let ([e (bitwise-arithmetic-shift-left 1 bits)])
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;;; INCORRECT (/ (bitwise-and v (- e 1)) e))])
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;;; INCORRECT (+ int frac))))])))
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(define (flnumerator x)
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(unless (flonum? x)
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@ -395,7 +411,7 @@
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exact->inexact inexact floor ceiling round log fl=? fl<? fl<=? fl>?
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fl>=? fl+ fl- fl* fl/ flsqrt flmin flzero? flnegative?
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sin cos tan asin acos atan sqrt exp
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flround flmax random)
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flmax random)
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(import
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(ikarus system $fx)
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(ikarus system $flonums)
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@ -404,7 +420,7 @@
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(ikarus system $chars)
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(ikarus system $strings)
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(only (ikarus flonums) $flonum->exact $flzero? $flnegative?
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$flonum->integer)
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$flonum->integer $flround)
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(except (ikarus) + - * / zero? = < <= > >= add1 sub1 quotient
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remainder modulo even? odd? quotient+remainder number->string
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bitwise-arithmetic-shift-right bitwise-arithmetic-shift-left
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@ -416,7 +432,7 @@
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fl=? fl<? fl<=? fl>? fl>=? fl+ fl- fl* fl/ flsqrt flmin
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flzero? flnegative? sra sll exp
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sin cos tan asin acos atan sqrt truncate fltruncate
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flround flmax random))
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flmax random))
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(module (bignum->flonum)
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@ -615,32 +631,32 @@
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(define (ratnum->flonum x)
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(define (->flonum n d)
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(let-values ([(q r) (quotient+remainder n d)])
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(if (= r 0)
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(inexact q)
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(if (= q 0)
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(/ (->flonum d n))
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(+ q (->flonum r d))))))
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(let ([n (numerator x)] [d (denominator x)])
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(let ([b (bitwise-first-bit-set n)])
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(if (eqv? b 0)
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(let ([b (bitwise-first-bit-set d)])
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(if (eqv? b 0)
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(->flonum n d)
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(/ (->flonum n (bitwise-arithmetic-shift-right d b))
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(expt 2.0 b))))
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(* (->flonum (bitwise-arithmetic-shift-right n b) d)
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(expt 2.0 b))))))
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;;; (define (ratnum->flonum x)
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;;; (let f ([n ($ratnum-n x)] [d ($ratnum-d x)])
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;;; (define (->flonum n d)
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;;; (let-values ([(q r) (quotient+remainder n d)])
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;;; (if (= q 0)
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;;; (/ 1.0 (f d n))
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;;; (if (= r 0)
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;;; (inexact q)
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;;; (+ q (f r d)))))))
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;;; (if (= q 0)
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;;; (/ (->flonum d n))
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;;; (+ q (->flonum r d))))))
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;;; (let ([n (numerator x)] [d (denominator x)])
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;;; (let ([b (bitwise-first-bit-set n)])
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;;; (if (eqv? b 0)
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;;; (let ([b (bitwise-first-bit-set d)])
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;;; (if (eqv? b 0)
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;;; (->flonum n d)
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;;; (/ (->flonum n (bitwise-arithmetic-shift-right d b))
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;;; (expt 2.0 b))))
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;;; (* (->flonum (bitwise-arithmetic-shift-right n b) d)
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;;; (expt 2.0 b))))))
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(define (ratnum->flonum x)
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(let f ([n ($ratnum-n x)] [d ($ratnum-d x)])
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(let-values ([(q r) (quotient+remainder n d)])
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(if (= q 0)
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(/ 1.0 (f d n))
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(if (= r 0)
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(inexact q)
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(+ q (f r d)))))))
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(define binary+
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(lambda (x y)
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@ -2120,10 +2136,6 @@
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(let ([n ($ratnum-n x)] [d ($ratnum-d x)])
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(quotient n d)))
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(define (flround x)
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(if (flonum? x)
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($flround x)
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(error 'flround "not a flonum" x)))
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(define (round x)
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(cond
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@ -431,7 +431,7 @@
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[$fl<= $flonums]
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[$fl> $flonums]
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[$fl>= $flonums]
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[$flround $flonums]
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;[$flround $flonums]
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[$fixnum->flonum $flonums]
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[$flonum-sbe $flonums]
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[$make-bignum $bignums]
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@ -987,19 +987,6 @@
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[(P x y) (check-flonums (list x y) ($flcmp-aux 'fl:>= x y))]
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[(E x y) (check-flonums (list x y) (nop))])
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(define-primop $flround unsafe
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[(V fl)
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(let ([bv #vu8(1 0 0 0 0 0 0 0)])
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(with-tmp ([x (prm 'alloc (K (align flonum-size)) (K vector-tag))])
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(prm 'mset x (K (- vector-tag)) (K flonum-tag))
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(prm 'fl:load (T fl) (K (- disp-flonum-data vector-tag)))
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(prm 'fl:mul! (K (make-object bv))
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(K (- disp-bytevector-data bytevector-tag)))
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(prm 'fl:div! (K (make-object bv))
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(K (- disp-bytevector-data bytevector-tag)))
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(prm 'fl:store x (K (- disp-flonum-data vector-tag)))
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x))])
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(define-primop $flonum-sbe unsafe
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[(V x)
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(prm 'sll
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