;;; a utility for defining derive-type methods of integer operations. If
;;; the types of both X and Y are integer types, then we compute a new
;;; integer type with bounds determined Fun when applied to X and Y.
-;;; Otherwise, we use Numeric-Contagion.
+;;; Otherwise, we use NUMERIC-CONTAGION.
(defun derive-integer-type-aux (x y fun)
(declare (type function fun))
(if (and (numeric-type-p x) (numeric-type-p y)
;;; simple utility to flatten a list
(defun flatten-list (x)
- (labels ((flatten-helper (x r);; 'r' is the stuff to the 'right'.
- (cond ((null x) r)
- ((atom x)
- (cons x r))
- (t (flatten-helper (car x)
- (flatten-helper (cdr x) r))))))
- (flatten-helper x nil)))
+ (labels ((flatten-and-append (tree list)
+ (cond ((null tree) list)
+ ((atom tree) (cons tree list))
+ (t (flatten-and-append
+ (car tree) (flatten-and-append (cdr tree) list))))))
+ (flatten-and-append x nil)))
;;; Take some type of lvar and massage it so that we get a list of the
;;; constituent types. If ARG is *EMPTY-TYPE*, return NIL to indicate
(if member-fun
(with-float-traps-masked
(:underflow :overflow :divide-by-zero)
- (make-member-type
- :members (list
- (funcall member-fun
- (first (member-type-members x))))))
+ (specifier-type
+ `(eql ,(funcall member-fun
+ (first (member-type-members x))))))
;; Otherwise convert to a numeric type.
(let ((result-type-list
(funcall derive-fun (convert-member-type x))))
(cond ((and (member-type-p x) (member-type-p y))
(let* ((x (first (member-type-members x)))
(y (first (member-type-members y)))
- (result (with-float-traps-masked
- (:underflow :overflow :divide-by-zero
- :invalid)
- (funcall fun x y))))
- (cond ((null result))
+ (result (ignore-errors
+ (with-float-traps-masked
+ (:underflow :overflow :divide-by-zero
+ :invalid)
+ (funcall fun x y)))))
+ (cond ((null result) *empty-type*)
((and (floatp result) (float-nan-p result))
(make-numeric-type :class 'float
:format (type-of result)
:complexp :real))
(t
- (make-member-type :members (list result))))))
+ (specifier-type `(eql ,result))))))
((and (member-type-p x) (numeric-type-p y))
(let* ((x (convert-member-type x))
(y (if convert-type (convert-numeric-type y) y))
(defoptimizer (values derive-type) ((&rest values))
(make-values-type :required (mapcar #'lvar-type values)))
+
+(defun signum-derive-type-aux (type)
+ (if (eq (numeric-type-complexp type) :complex)
+ (let* ((format (case (numeric-type-class type)
+ ((integer rational) 'single-float)
+ (t (numeric-type-format type))))
+ (bound-format (or format 'float)))
+ (make-numeric-type :class 'float
+ :format format
+ :complexp :complex
+ :low (coerce -1 bound-format)
+ :high (coerce 1 bound-format)))
+ (let* ((interval (numeric-type->interval type))
+ (range-info (interval-range-info interval))
+ (contains-0-p (interval-contains-p 0 interval))
+ (class (numeric-type-class type))
+ (format (numeric-type-format type))
+ (one (coerce 1 (or format class 'real)))
+ (zero (coerce 0 (or format class 'real)))
+ (minus-one (coerce -1 (or format class 'real)))
+ (plus (make-numeric-type :class class :format format
+ :low one :high one))
+ (minus (make-numeric-type :class class :format format
+ :low minus-one :high minus-one))
+ ;; KLUDGE: here we have a fairly horrible hack to deal
+ ;; with the schizophrenia in the type derivation engine.
+ ;; The problem is that the type derivers reinterpret
+ ;; numeric types as being exact; so (DOUBLE-FLOAT 0d0
+ ;; 0d0) within the derivation mechanism doesn't include
+ ;; -0d0. Ugh. So force it in here, instead.
+ (zero (make-numeric-type :class class :format format
+ :low (- zero) :high zero)))
+ (case range-info
+ (+ (if contains-0-p (type-union plus zero) plus))
+ (- (if contains-0-p (type-union minus zero) minus))
+ (t (type-union minus zero plus))))))
+
+(defoptimizer (signum derive-type) ((num))
+ (one-arg-derive-type num #'signum-derive-type-aux nil))
\f
;;;; byte operations
;;;;
;;; "goodness" means that the result will not increase (in the
;;; (unsigned-byte +infinity) sense). An ordinary modular function is
;;; replaced with the version, cutting its result to WIDTH or more
-;;; bits. If we have changed anything, we need to flush old derived
-;;; types, because they have nothing in common with the new code.
+;;; bits. For most functions (e.g. for +) we cut all arguments; for
+;;; others (e.g. for ASH) we have "optimizers", cutting only necessary
+;;; arguments (maybe to a different width) and returning the name of a
+;;; modular version, if it exists, or NIL. If we have changed
+;;; anything, we need to flush old derived types, because they have
+;;; nothing in common with the new code.
(defun cut-to-width (lvar width)
(declare (type lvar lvar) (type (integer 0) width))
(labels ((reoptimize-node (node name)
(setf (block-reoptimize (node-block node)) t)
(setf (component-reoptimize (node-component node)) t))
(cut-node (node &aux did-something)
- (when (and (combination-p node)
+ (when (and (not (block-delete-p (node-block node)))
+ (combination-p node)
(fun-info-p (basic-combination-kind node)))
(let* ((fun-ref (lvar-use (combination-fun node)))
(fun-name (leaf-source-name (ref-leaf fun-ref)))
- (modular-fun (find-modular-version fun-name width))
- (name (and (modular-fun-info-p modular-fun)
- (modular-fun-info-name modular-fun))))
+ (modular-fun (find-modular-version fun-name width)))
(when (and modular-fun
- (not (and (eq name 'logand)
+ (not (and (eq fun-name 'logand)
(csubtypep
(single-value-type (node-derived-type node))
(specifier-type `(unsigned-byte ,width))))))
- (unless (eq modular-fun :good)
- (setq did-something t)
- (change-ref-leaf
+ (binding* ((name (etypecase modular-fun
+ ((eql :good) fun-name)
+ (modular-fun-info
+ (modular-fun-info-name modular-fun))
+ (function
+ (funcall modular-fun node width)))
+ :exit-if-null))
+ (unless (eql modular-fun :good)
+ (setq did-something t)
+ (change-ref-leaf
fun-ref
(find-free-fun name "in a strange place"))
(setf (combination-kind node) :full))
- (dolist (arg (basic-combination-args node))
- (when (cut-lvar arg)
- (setq did-something t)))
- (when did-something
- (reoptimize-node node fun-name))
- did-something))))
+ (unless (functionp modular-fun)
+ (dolist (arg (basic-combination-args node))
+ (when (cut-lvar arg)
+ (setq did-something t))))
+ (when did-something
+ (reoptimize-node node name))
+ did-something)))))
(cut-lvar (lvar &aux did-something)
(do-uses (node lvar)
(when (cut-node node)
(give-up-ir1-transform "BOOLE code is not a constant."))
(let ((control (lvar-value op)))
(case control
- (#.boole-clr 0)
- (#.boole-set -1)
- (#.boole-1 'x)
- (#.boole-2 'y)
- (#.boole-c1 '(lognot x))
- (#.boole-c2 '(lognot y))
- (#.boole-and '(logand x y))
- (#.boole-ior '(logior x y))
- (#.boole-xor '(logxor x y))
- (#.boole-eqv '(logeqv x y))
- (#.boole-nand '(lognand x y))
- (#.boole-nor '(lognor x y))
- (#.boole-andc1 '(logandc1 x y))
- (#.boole-andc2 '(logandc2 x y))
- (#.boole-orc1 '(logorc1 x y))
- (#.boole-orc2 '(logorc2 x y))
+ (#.sb!xc:boole-clr 0)
+ (#.sb!xc:boole-set -1)
+ (#.sb!xc:boole-1 'x)
+ (#.sb!xc:boole-2 'y)
+ (#.sb!xc:boole-c1 '(lognot x))
+ (#.sb!xc:boole-c2 '(lognot y))
+ (#.sb!xc:boole-and '(logand x y))
+ (#.sb!xc:boole-ior '(logior x y))
+ (#.sb!xc:boole-xor '(logxor x y))
+ (#.sb!xc:boole-eqv '(logeqv x y))
+ (#.sb!xc:boole-nand '(lognand x y))
+ (#.sb!xc:boole-nor '(lognor x y))
+ (#.sb!xc:boole-andc1 '(logandc1 x y))
+ (#.sb!xc:boole-andc2 '(logandc2 x y))
+ (#.sb!xc:boole-orc1 '(logorc1 x y))
+ (#.sb!xc:boole-orc2 '(logorc2 x y))
(t
(abort-ir1-transform "~S is an illegal control arg to BOOLE."
control)))))
`(- (ash (- x) ,shift)))
(- (logand (- x) ,mask)))
(values ,(if (minusp y)
- `(- (ash (- x) ,shift))
+ `(ash (- ,mask x) ,shift)
`(ash x ,shift))
(logand x ,mask))))))
;;; information. If X's high bound is < Y's low, then X < Y.
;;; Similarly, if X's low is >= to Y's high, the X >= Y (so return
;;; NIL). If not, at least make sure any constant arg is second.
-(macrolet ((def (name reflexive-p surely-true surely-false)
+(macrolet ((def (name inverse reflexive-p surely-true surely-false)
`(deftransform ,name ((x y))
(if (same-leaf-ref-p x y)
,reflexive-p
- (let ((x (or (type-approximate-interval (lvar-type x))
- (give-up-ir1-transform)))
- (y (or (type-approximate-interval (lvar-type y))
- (give-up-ir1-transform))))
+ (let ((ix (or (type-approximate-interval (lvar-type x))
+ (give-up-ir1-transform)))
+ (iy (or (type-approximate-interval (lvar-type y))
+ (give-up-ir1-transform))))
(cond (,surely-true
t)
(,surely-false
nil)
((and (constant-lvar-p x)
(not (constant-lvar-p y)))
- `(,',name y x))
+ `(,',inverse y x))
(t
(give-up-ir1-transform))))))))
- (def < nil (interval-< x y) (interval->= x y))
- (def > nil (interval-< y x) (interval->= y x))
- (def <= t (interval->= y x) (interval-< y x))
- (def >= t (interval->= x y) (interval-< x y)))
+ (def < > nil (interval-< ix iy) (interval->= ix iy))
+ (def > < nil (interval-< iy ix) (interval->= iy ix))
+ (def <= >= t (interval->= iy ix) (interval-< iy ix))
+ (def >= <= t (interval->= ix iy) (interval-< ix iy)))
(defun ir1-transform-char< (x y first second inverse)
(cond
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