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- ;;; -*- Package: SPARC -*-
- ;;;
- ;;; **********************************************************************
- ;;; This code was written as part of the Spice Lisp project at
- ;;; Carnegie-Mellon University, and has been placed in the public domain.
- ;;; If you want to use this code or any part of Spice Lisp, please contact
- ;;; Scott Fahlman (FAHLMAN@CMUC).
- ;;; **********************************************************************
- ;;;
- ;;; $Header: type-vops.lisp,v 1.9 91/11/09 02:38:22 wlott Exp $
- ;;;
- ;;; This file contains the VM definition of type testing and checking VOPs
- ;;; for the SPARC.
- ;;;
- ;;; Written by William Lott.
- ;;;
- (in-package "SPARC")
-
-
- ;;;; Simple type checking and testing:
- ;;;
- ;;; These types are represented by a single type code, so are easily
- ;;; open-coded as a mask and compare.
-
- (define-vop (check-type)
- (:args (value :target result :scs (any-reg descriptor-reg)))
- (:results (result :scs (any-reg descriptor-reg)))
- (:temporary (:type random :scs (non-descriptor-reg)) temp)
- (:vop-var vop)
- (:save-p :compute-only))
-
- (define-vop (type-predicate)
- (:args (value :scs (any-reg descriptor-reg)))
- (:conditional)
- (:info target not-p)
- (:policy :fast-safe)
- (:temporary (:type random :scs (non-descriptor-reg)) temp))
-
- (eval-when (compile eval)
-
- (defun cost-to-test-types (type-codes)
- (+ (* 2 (length type-codes))
- (if (> (apply #'max type-codes) vm:lowtag-limit) 7 2)))
-
- (defmacro def-type-vops (pred-name check-name ptype error-code
- &rest type-codes)
- (let ((cost (cost-to-test-types (mapcar #'eval type-codes))))
- `(progn
- ,@(when pred-name
- `((define-vop (,pred-name type-predicate)
- (:translate ,pred-name)
- (:generator ,cost
- (test-type value temp target not-p ,@type-codes)))))
- ,@(when check-name
- `((define-vop (,check-name check-type)
- (:generator ,cost
- (let ((err-lab
- (generate-error-code vop ,error-code value)))
- (test-type value temp err-lab t ,@type-codes)
- (move result value))))))
- ,@(when ptype
- `((primitive-type-vop ,check-name (:check) ,ptype))))))
-
- ); eval-when (compile eval)
-
- (def-type-vops fixnump nil nil nil vm:even-fixnum-type vm:odd-fixnum-type)
- (define-vop (check-fixnum check-type)
- (:ignore temp)
- (:generator 1
- (inst taddcctv result value zero-tn)))
- (primitive-type-vop check-fixnum (:check) fixnum)
-
-
- (def-type-vops functionp check-function function
- object-not-function-error vm:function-pointer-type)
-
- (def-type-vops listp nil nil nil vm:list-pointer-type)
- (define-vop (check-list check-type)
- (:generator 3
- (inst and temp value lowtag-mask)
- (inst cmp temp list-pointer-type)
- (inst t :ne (logior (ash (tn-offset value) 8) object-not-list-trap))
- (move result value)))
- (primitive-type-vop check-list (:check) list)
-
- (def-type-vops structurep nil nil nil vm:structure-pointer-type)
- (define-vop (check-structure check-type)
- (:generator 3
- (inst and temp value lowtag-mask)
- (inst cmp temp structure-pointer-type)
- (inst t :ne (logior (ash (tn-offset value) 8) object-not-structure-trap))
- (move result value)))
- (primitive-type-vop check-structure (:check) structure)
-
- (def-type-vops bignump check-bigunm bignum
- object-not-bignum-error vm:bignum-type)
-
- (def-type-vops ratiop check-ratio ratio
- object-not-ratio-error vm:ratio-type)
-
- (def-type-vops complexp check-complex complex
- object-not-complex-error vm:complex-type)
-
- (def-type-vops single-float-p check-single-float single-float
- object-not-single-float-error vm:single-float-type)
-
- (def-type-vops double-float-p check-double-float double-float
- object-not-double-float-error vm:double-float-type)
-
- (def-type-vops simple-string-p check-simple-string simple-string
- object-not-simple-string-error vm:simple-string-type)
-
- (def-type-vops simple-bit-vector-p check-simple-bit-vector simple-bit-vector
- object-not-simple-bit-vector-error vm:simple-bit-vector-type)
-
- (def-type-vops simple-vector-p check-simple-vector simple-vector
- object-not-simple-vector-error vm:simple-vector-type)
-
- (def-type-vops simple-array-unsigned-byte-2-p
- check-simple-array-unsigned-byte-2
- simple-array-unsigned-byte-2
- object-not-simple-array-unsigned-byte-2-error
- vm:simple-array-unsigned-byte-2-type)
-
- (def-type-vops simple-array-unsigned-byte-4-p
- check-simple-array-unsigned-byte-4
- simple-array-unsigned-byte-4
- object-not-simple-array-unsigned-byte-4-error
- vm:simple-array-unsigned-byte-4-type)
-
- (def-type-vops simple-array-unsigned-byte-8-p
- check-simple-array-unsigned-byte-8
- simple-array-unsigned-byte-8
- object-not-simple-array-unsigned-byte-8-error
- vm:simple-array-unsigned-byte-8-type)
-
- (def-type-vops simple-array-unsigned-byte-16-p
- check-simple-array-unsigned-byte-16
- simple-array-unsigned-byte-16
- object-not-simple-array-unsigned-byte-16-error
- vm:simple-array-unsigned-byte-16-type)
-
- (def-type-vops simple-array-unsigned-byte-32-p
- check-simple-array-unsigned-byte-32
- simple-array-unsigned-byte-32
- object-not-simple-array-unsigned-byte-32-error
- vm:simple-array-unsigned-byte-32-type)
-
- (def-type-vops simple-array-single-float-p check-simple-array-single-float
- simple-array-single-float object-not-simple-array-single-float-error
- vm:simple-array-single-float-type)
-
- (def-type-vops simple-array-double-float-p check-simple-array-double-float
- simple-array-double-float object-not-simple-array-double-float-error
- vm:simple-array-double-float-type)
-
- (def-type-vops base-char-p check-base-char base-char
- object-not-base-char-error vm:base-char-type)
-
- (def-type-vops system-area-pointer-p check-system-area-pointer
- system-area-pointer object-not-sap-error vm:sap-type)
-
- (def-type-vops weak-pointer-p check-weak-pointer weak-pointer
- object-not-weak-pointer-error vm:weak-pointer-type)
-
- (def-type-vops scavenger-hook-p nil nil nil
- 0)
-
- (def-type-vops code-component-p nil nil nil
- vm:code-header-type)
-
- (def-type-vops lra-p nil nil nil
- vm:return-pc-header-type)
-
- (def-type-vops funcallable-instance-p nil nil nil
- vm:funcallable-instance-header-type)
-
- (def-type-vops array-header-p nil nil nil
- vm:simple-array-type vm:complex-string-type vm:complex-bit-vector-type
- vm:complex-vector-type vm:complex-array-type)
-
- (def-type-vops nil check-function-or-symbol nil object-not-function-or-symbol-error
- vm:function-pointer-type vm:symbol-header-type)
-
- (def-type-vops stringp check-string nil object-not-string-error
- vm:simple-string-type vm:complex-string-type)
-
- (def-type-vops bit-vector-p check-bit-vector nil object-not-bit-vector-error
- vm:simple-bit-vector-type vm:complex-bit-vector-type)
-
- (def-type-vops vectorp check-vector nil object-not-vector-error
- vm:simple-string-type vm:simple-bit-vector-type vm:simple-vector-type
- vm:simple-array-unsigned-byte-2-type vm:simple-array-unsigned-byte-4-type
- vm:simple-array-unsigned-byte-8-type vm:simple-array-unsigned-byte-16-type
- vm:simple-array-unsigned-byte-32-type vm:simple-array-single-float-type
- vm:simple-array-double-float-type vm:complex-string-type
- vm:complex-bit-vector-type vm:complex-vector-type)
-
- (def-type-vops simple-array-p check-simple-array nil object-not-simple-array-error
- vm:simple-array-type vm:simple-string-type vm:simple-bit-vector-type
- vm:simple-vector-type vm:simple-array-unsigned-byte-2-type
- vm:simple-array-unsigned-byte-4-type vm:simple-array-unsigned-byte-8-type
- vm:simple-array-unsigned-byte-16-type vm:simple-array-unsigned-byte-32-type
- vm:simple-array-single-float-type vm:simple-array-double-float-type)
-
- (def-type-vops arrayp check-array nil object-not-array-error
- vm:simple-array-type vm:simple-string-type vm:simple-bit-vector-type
- vm:simple-vector-type vm:simple-array-unsigned-byte-2-type
- vm:simple-array-unsigned-byte-4-type vm:simple-array-unsigned-byte-8-type
- vm:simple-array-unsigned-byte-16-type vm:simple-array-unsigned-byte-32-type
- vm:simple-array-single-float-type vm:simple-array-double-float-type
- vm:complex-string-type vm:complex-bit-vector-type vm:complex-vector-type
- vm:complex-array-type)
-
- (def-type-vops numberp check-number nil object-not-number-error
- vm:even-fixnum-type vm:odd-fixnum-type vm:bignum-type vm:ratio-type
- vm:single-float-type vm:double-float-type vm:complex-type)
-
- (def-type-vops rationalp check-rational nil object-not-rational-error
- vm:even-fixnum-type vm:odd-fixnum-type vm:ratio-type vm:bignum-type)
-
- (def-type-vops integerp check-integer nil object-not-integer-error
- vm:even-fixnum-type vm:odd-fixnum-type vm:bignum-type)
-
- (def-type-vops floatp check-float nil object-not-float-error
- vm:single-float-type vm:double-float-type)
-
- (def-type-vops realp check-real nil object-not-real-error
- vm:even-fixnum-type vm:odd-fixnum-type vm:ratio-type vm:bignum-type
- vm:single-float-type vm:double-float-type)
-
-
- ;;;; Other integer ranges.
-
- ;;; A (signed-byte 32) can be represented with either fixnum or a bignum with
- ;;; exactly one digit.
-
- (define-vop (signed-byte-32-p type-predicate)
- (:translate signed-byte-32-p)
- (:generator 45
- (let ((not-target (gen-label)))
- (multiple-value-bind
- (yep nope)
- (if not-p
- (values not-target target)
- (values target not-target))
- (inst andcc zero-tn value #x3)
- (inst b :eq yep)
- (test-type value temp nope t vm:other-pointer-type)
- (loadw temp value 0 vm:other-pointer-type)
- (inst cmp temp (+ (ash 1 vm:type-bits)
- vm:bignum-type))
- (inst b (if not-p :ne :eq) target)
- (inst nop)
- (emit-label not-target)))))
-
- (define-vop (check-signed-byte-32 check-type)
- (:generator 45
- (let ((nope (generate-error-code vop object-not-signed-byte-32-error value))
- (yep (gen-label)))
- (inst andcc temp value #x3)
- (inst b :eq yep)
- (test-type value temp nope t vm:other-pointer-type)
- (loadw temp value 0 vm:other-pointer-type)
- (inst cmp temp (+ (ash 1 vm:type-bits) vm:bignum-type))
- (inst b :ne nope)
- (inst nop)
- (emit-label yep)
- (move result value))))
-
-
- ;;; An (unsigned-byte 32) can be represented with either a positive fixnum, a
- ;;; bignum with exactly one positive digit, or a bignum with exactly two digits
- ;;; and the second digit all zeros.
-
- (define-vop (unsigned-byte-32-p type-predicate)
- (:translate unsigned-byte-32-p)
- (:generator 45
- (let ((not-target (gen-label))
- (single-word (gen-label))
- (fixnum (gen-label)))
- (multiple-value-bind
- (yep nope)
- (if not-p
- (values not-target target)
- (values target not-target))
- ;; Is it a fixnum?
- (inst andcc temp value #x3)
- (inst b :eq fixnum)
- (inst cmp value)
-
- ;; If not, is it an other pointer?
- (test-type value temp nope t vm:other-pointer-type)
- ;; Get the header.
- (loadw temp value 0 vm:other-pointer-type)
- ;; Is it one?
- (inst cmp temp (+ (ash 1 vm:type-bits) vm:bignum-type))
- (inst b :eq single-word)
- ;; If it's other than two, we can't be an (unsigned-byte 32)
- (inst cmp temp (+ (ash 2 vm:type-bits) vm:bignum-type))
- (inst b :ne nope)
- ;; Get the second digit.
- (loadw temp value (1+ vm:bignum-digits-offset) vm:other-pointer-type)
- ;; All zeros, its an (unsigned-byte 32).
- (inst cmp temp)
- (inst b :eq yep)
- (inst nop)
- ;; Otherwise, it isn't.
- (inst b nope)
- (inst nop)
-
- (emit-label single-word)
- ;; Get the single digit.
- (loadw temp value vm:bignum-digits-offset vm:other-pointer-type)
- (inst cmp temp)
-
- ;; positive implies (unsigned-byte 32).
- (emit-label fixnum)
- (inst b (if not-p :lt :ge) target)
- (inst nop)
-
- (emit-label not-target)))))
-
- (define-vop (check-unsigned-byte-32 check-type)
- (:generator 45
- (let ((nope
- (generate-error-code vop object-not-unsigned-byte-32-error value))
- (yep (gen-label))
- (fixnum (gen-label))
- (single-word (gen-label)))
- ;; Is it a fixnum?
- (inst andcc temp value #x3)
- (inst b :eq fixnum)
- (inst cmp value)
-
- ;; If not, is it an other pointer?
- (test-type value temp nope t vm:other-pointer-type)
- ;; Get the number of digits.
- (loadw temp value 0 vm:other-pointer-type)
- ;; Is it one?
- (inst cmp temp (+ (ash 1 vm:type-bits) vm:bignum-type))
- (inst b :eq single-word)
- ;; If it's other than two, we can't be an (unsigned-byte 32)
- (inst cmp temp (+ (ash 2 vm:type-bits) vm:bignum-type))
- (inst b :ne nope)
- ;; Get the second digit.
- (loadw temp value (1+ vm:bignum-digits-offset) vm:other-pointer-type)
- ;; All zeros, its an (unsigned-byte 32).
- (inst cmp temp)
- (inst b :eq yep)
- ;; Otherwise, it isn't.
- (inst b :ne nope)
- (inst nop)
-
- (emit-label single-word)
- ;; Get the single digit.
- (loadw temp value vm:bignum-digits-offset vm:other-pointer-type)
- ;; positive implies (unsigned-byte 32).
- (inst cmp temp)
-
- (emit-label fixnum)
- (inst b :lt nope)
- (inst nop)
-
- (emit-label yep)
- (move result value))))
-
-
-
-
- ;;;; List/symbol types:
- ;;;
- ;;; symbolp (or symbol (eq nil))
- ;;; consp (and list (not (eq nil)))
-
- (define-vop (symbolp type-predicate)
- (:translate symbolp)
- (:generator 12
- (let* ((drop-thru (gen-label))
- (is-symbol-label (if not-p drop-thru target)))
- (inst cmp value null-tn)
- (inst b :eq is-symbol-label)
- (test-type value temp target not-p vm:symbol-header-type)
- (emit-label drop-thru))))
-
- (define-vop (check-symbol check-type)
- (:generator 12
- (let ((drop-thru (gen-label))
- (error (generate-error-code vop object-not-symbol-error value)))
- (inst cmp value null-tn)
- (inst b :eq drop-thru)
- (test-type value temp error t vm:symbol-header-type)
- (emit-label drop-thru)
- (move result value))))
-
- (define-vop (consp type-predicate)
- (:translate consp)
- (:generator 8
- (let* ((drop-thru (gen-label))
- (is-not-cons-label (if not-p target drop-thru)))
- (inst cmp value null-tn)
- (inst b :eq is-not-cons-label)
- (test-type value temp target not-p vm:list-pointer-type)
- (emit-label drop-thru))))
-
- (define-vop (check-cons check-type)
- (:generator 8
- (let ((error (generate-error-code vop object-not-cons-error value)))
- (inst cmp value null-tn)
- (inst b :eq error)
- (test-type value temp error t vm:list-pointer-type)
- (move result value))))
-
-
- ;;;; Function Coercion
-
- ;;; If not a function, get the symbol value and test for that being a
- ;;; function. Since we test for a function rather than the unbound
- ;;; marker, this works on NIL.
- ;;;
- (define-vop (coerce-to-function)
- (:args (object :scs (descriptor-reg)
- :target result))
- (:results (result :scs (descriptor-reg)))
- (:temporary (:type random :scs (non-descriptor-reg)) nd-temp)
- (:temporary (:scs (descriptor-reg)) saved-object)
- (:vop-var vop)
- (:save-p :compute-only)
- (:generator 0
- (let ((not-function-label (gen-label))
- (not-coercable-label (gen-label))
- (done-label (gen-label)))
- (test-type object nd-temp not-function-label t
- vm:function-pointer-type)
- (move result object)
- (emit-label done-label)
-
- (assemble (*elsewhere*)
- (emit-label not-function-label)
- (test-type object nd-temp not-coercable-label t
- vm:symbol-header-type)
- (move saved-object object)
- (loadw result object vm:symbol-function-slot vm:other-pointer-type)
- (test-type result nd-temp done-label nil
- vm:function-pointer-type)
- (error-call vop undefined-symbol-error saved-object)
-
- (emit-label not-coercable-label)
- (error-call vop object-not-coercable-to-function-error object)))))
-
- (define-vop (fast-safe-coerce-to-function)
- (:args (object :scs (descriptor-reg)
- :target result))
- (:results (result :scs (descriptor-reg)))
- (:temporary (:type random :scs (non-descriptor-reg)) nd-temp)
- (:temporary (:scs (descriptor-reg)) saved-object)
- (:vop-var vop)
- (:save-p :compute-only)
- (:generator 10
- (let ((not-function-label (gen-label))
- (done-label (gen-label)))
- (test-type object nd-temp not-function-label t vm:function-pointer-type)
- (move result object)
- (emit-label done-label)
-
- (assemble (*elsewhere*)
- (emit-label not-function-label)
- (move saved-object object)
- (loadw result object vm:symbol-function-slot vm:other-pointer-type)
- (test-type result nd-temp done-label nil vm:function-pointer-type)
- (error-call vop undefined-symbol-error saved-object)))))
-