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;;;; the VM definition of various primitive memory access VOPs for the
;;;; Alpha
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
;;;;
;;;; This software is derived from the CMU CL system, which was
;;;; written at Carnegie Mellon University and released into the
;;;; public domain. The software is in the public domain and is
;;;; provided with absolutely no warranty. See the COPYING and CREDITS
;;;; files for more information.
(in-package "SB!VM")
;;;; data object ref/set stuff
(define-vop (slot)
(:args (object :scs (descriptor-reg)))
(:info name offset lowtag)
(:ignore name)
(:results (result :scs (descriptor-reg any-reg)))
(:generator 1
(loadw result object offset lowtag)))
(define-vop (set-slot)
(:args (object :scs (descriptor-reg))
(value :scs (descriptor-reg any-reg null zero)))
(:info name offset lowtag #!+gengc remember)
(:ignore name)
(:results)
(:generator 1
#!+gengc
(if remember
(storew-and-remember-slot value object offset lowtag)
(storew value object offset lowtag))
#!-gengc
(storew value object offset lowtag)))
;;;; symbol hacking VOPs
;;; The compiler likes to be able to directly SET symbols.
(define-vop (set cell-set)
(:variant symbol-value-slot other-pointer-lowtag))
;;; Do a cell ref with an error check for being unbound.
(define-vop (checked-cell-ref)
(:args (object :scs (descriptor-reg) :target obj-temp))
(:results (value :scs (descriptor-reg any-reg)))
(:policy :fast-safe)
(:vop-var vop)
(:save-p :compute-only)
(:temporary (:scs (non-descriptor-reg)) temp)
(:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp))
;;; With SYMBOL-VALUE, we check that the value isn't the trap object.
;;; So SYMBOL-VALUE of NIL is NIL.
(define-vop (symbol-value checked-cell-ref)
(:translate symbol-value)
(:generator 9
(move object obj-temp)
(loadw value obj-temp symbol-value-slot other-pointer-lowtag)
(let ((err-lab (generate-error-code vop unbound-symbol-error obj-temp)))
(inst xor value unbound-marker-widetag temp)
(inst beq temp err-lab))))
;;; like CHECKED-CELL-REF, only we are a predicate to see if the cell
;;; is bound
(define-vop (boundp-frob)
(:args (object :scs (descriptor-reg)))
(:conditional)
(:info target not-p)
(:policy :fast-safe)
(:temporary (:scs (descriptor-reg)) value)
(:temporary (:scs (non-descriptor-reg)) temp))
(define-vop (boundp boundp-frob)
(:translate boundp)
(:generator 9
(loadw value object symbol-value-slot other-pointer-lowtag)
(inst xor value unbound-marker-widetag temp)
(if not-p
(inst beq temp target)
(inst bne temp target))))
(define-vop (fast-symbol-value cell-ref)
(:variant symbol-value-slot other-pointer-lowtag)
(:policy :fast)
(:translate symbol-value))
(define-vop (symbol-hash)
(:policy :fast-safe)
(:translate symbol-hash)
(:args (symbol :scs (descriptor-reg)))
(:results (res :scs (any-reg)))
(:result-types positive-fixnum)
(:generator 2
;; The symbol-hash slot of NIL holds NIL because it is also the
;; cdr slot, so we have to strip off the two low bits to make sure
;; it is a fixnum. The lowtag selection magic that is required to
;; ensure this is explained in the comment in objdef.lisp
(loadw res symbol symbol-hash-slot other-pointer-lowtag)
(inst bic res #.(ash lowtag-mask -1) res)))
;;;; fdefinition (FDEFN) objects
(define-vop (fdefn-fun cell-ref)
(:variant fdefn-fun-slot other-pointer-lowtag))
(define-vop (safe-fdefn-fun)
(:args (object :scs (descriptor-reg) :target obj-temp))
(:results (value :scs (descriptor-reg any-reg)))
(:vop-var vop)
(:save-p :compute-only)
(:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp)
(:temporary (:scs (non-descriptor-reg)) temp)
(:generator 10
(move object obj-temp)
(loadw value obj-temp fdefn-fun-slot other-pointer-lowtag)
(let ((err-lab (generate-error-code vop undefined-fun-error obj-temp)))
(inst cmpeq value null-tn temp)
(inst bne temp err-lab))))
(define-vop (set-fdefn-fun)
(:policy :fast-safe)
(:translate (setf fdefn-fun))
(:args (function :scs (descriptor-reg) :target result)
(fdefn :scs (descriptor-reg)))
(:temporary (:scs (interior-reg)) lip)
(:temporary (:scs (non-descriptor-reg)) type)
(:results (result :scs (descriptor-reg)))
(:generator 38
(let ((normal-fn (gen-label)))
(load-type type function (- fun-pointer-lowtag))
(inst xor type simple-fun-header-widetag type)
(inst addq function
(- (ash simple-fun-code-offset word-shift) fun-pointer-lowtag)
lip)
(inst beq type normal-fn)
(inst li (make-fixup "closure_tramp" :foreign) lip)
(emit-label normal-fn)
(storew lip fdefn fdefn-raw-addr-slot other-pointer-lowtag)
(storew function fdefn fdefn-fun-slot other-pointer-lowtag)
(move function result))))
(define-vop (fdefn-makunbound)
(:policy :fast-safe)
(:translate fdefn-makunbound)
(:args (fdefn :scs (descriptor-reg) :target result))
(:temporary (:scs (non-descriptor-reg)) temp)
(:results (result :scs (descriptor-reg)))
(:generator 38
(storew null-tn fdefn fdefn-fun-slot other-pointer-lowtag)
(inst li (make-fixup "undefined_tramp" :foreign) temp)
(move fdefn result)
(storew temp fdefn fdefn-raw-addr-slot other-pointer-lowtag)))
;;;; binding and Unbinding
;;; Establish VAL as a binding for SYMBOL. Save the old value and the
;;; symbol on the binding stack and stuff the new value into the symbol.
(define-vop (bind)
(:args (val :scs (any-reg descriptor-reg))
(symbol :scs (descriptor-reg)))
(:temporary (:scs (descriptor-reg)) temp)
(:generator 5
(loadw temp symbol symbol-value-slot other-pointer-lowtag)
(inst addq bsp-tn (* 2 n-word-bytes) bsp-tn)
(storew temp bsp-tn (- binding-value-slot binding-size))
(storew symbol bsp-tn (- binding-symbol-slot binding-size))
(#!+gengc storew-and-remember-slot #!-gengc storew
val symbol symbol-value-slot other-pointer-lowtag)))
(define-vop (unbind)
(:temporary (:scs (descriptor-reg)) symbol value)
(:generator 0
(loadw symbol bsp-tn (- binding-symbol-slot binding-size))
(loadw value bsp-tn (- binding-value-slot binding-size))
(#!+gengc storew-and-remember-slot #!-gengc storew
value symbol symbol-value-slot other-pointer-lowtag)
(storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
(inst subq bsp-tn (* 2 n-word-bytes) bsp-tn)))
(define-vop (unbind-to-here)
(:args (arg :scs (descriptor-reg any-reg) :target where))
(:temporary (:scs (any-reg) :from (:argument 0)) where)
(:temporary (:scs (descriptor-reg)) symbol value)
(:temporary (:scs (non-descriptor-reg)) temp)
(:generator 0
(let ((loop (gen-label))
(skip (gen-label))
(done (gen-label)))
(move arg where)
(inst cmpeq where bsp-tn temp)
(inst bne temp done)
(emit-label loop)
(loadw symbol bsp-tn (- binding-symbol-slot binding-size))
(loadw value bsp-tn (- binding-value-slot binding-size))
(inst beq symbol skip)
(#!+gengc storew-and-remember-slot #!-gengc storew
value symbol symbol-value-slot other-pointer-lowtag)
(storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
(emit-label skip)
(inst subq bsp-tn (* 2 n-word-bytes) bsp-tn)
(inst cmpeq where bsp-tn temp)
(inst beq temp loop)
(emit-label done))))
;;;; closure indexing
(define-full-reffer closure-index-ref *
closure-info-offset fun-pointer-lowtag
(descriptor-reg any-reg) * %closure-index-ref)
(define-full-setter set-funcallable-instance-info *
funcallable-instance-info-offset fun-pointer-lowtag
(descriptor-reg any-reg null zero) * %set-funcallable-instance-info)
(define-full-reffer funcallable-instance-info *
funcallable-instance-info-offset fun-pointer-lowtag
(descriptor-reg any-reg) * %funcallable-instance-info)
(define-vop (funcallable-instance-lexenv cell-ref)
(:variant funcallable-instance-lexenv-slot fun-pointer-lowtag))
(define-vop (closure-ref slot-ref)
(:variant closure-info-offset fun-pointer-lowtag))
(define-vop (closure-init slot-set)
(:variant closure-info-offset fun-pointer-lowtag))
;;;; value cell hackery
(define-vop (value-cell-ref cell-ref)
(:variant value-cell-value-slot other-pointer-lowtag))
(define-vop (value-cell-set cell-set)
(:variant value-cell-value-slot other-pointer-lowtag))
;;;; instance hackery
(define-vop (instance-length)
(:policy :fast-safe)
(:translate %instance-length)
(:args (struct :scs (descriptor-reg)))
(:results (res :scs (unsigned-reg)))
(:result-types positive-fixnum)
(:generator 4
(loadw res struct 0 instance-pointer-lowtag)
(inst srl res n-widetag-bits res)))
(define-vop (instance-ref slot-ref)
(:variant instance-slots-offset instance-pointer-lowtag)
(:policy :fast-safe)
(:translate %instance-ref)
(:arg-types instance (:constant index)))
(define-vop (instance-set slot-set)
(:policy :fast-safe)
(:translate %instance-set)
(:variant instance-slots-offset instance-pointer-lowtag)
(:arg-types instance (:constant index) *))
(define-full-reffer instance-index-ref * instance-slots-offset
instance-pointer-lowtag (descriptor-reg any-reg) * %instance-ref)
(define-full-setter instance-index-set * instance-slots-offset
instance-pointer-lowtag (descriptor-reg any-reg null zero) * %instance-set)
;;;; code object frobbing
(define-full-reffer code-header-ref * 0 other-pointer-lowtag
(descriptor-reg any-reg) * code-header-ref)
(define-full-setter code-header-set * 0 other-pointer-lowtag
(descriptor-reg any-reg null zero) * code-header-set)
;;;; mutator accessing
#!+gengc
(progn
(eval-when (:compile-toplevel :load-toplevel :execute)
;; SBCL has never had GENGC. Now that we have Alpha support, it
;; would probably be nice to restore GENGC support so that the Alpha
;; doesn't have to crawl along with stop'n'copy. When we do, the CMU
;; CL code below will need updating to the SBCL way of looking at
;; things, e.g. at least using "SB-KERNEL" or "SB!KERNEL" instead of
;; :KERNEL. -- WHN 2001-05-08
(error "This code is stale as of sbcl-0.6.12."))
(define-vop (mutator-ub32-ref)
(:policy :fast-safe)
(:args)
(:results (res :scs (unsigned-reg)))
(:result-types unsigned-num)
(:variant-vars slot)
(:generator 2
(loadw res mutator-tn slot)))
(define-vop (mutator-descriptor-ref mutator-ub32-ref)
(:results (res :scs (any-reg descriptor-reg)))
(:result-types *))
(define-vop (mutator-sap-ref mutator-ub32-ref)
(:results (res :scs (sap-reg)))
(:result-types system-area-pointer))
(define-vop (mutator-ub32-set)
(:policy :fast-safe)
(:args (arg :scs (unsigned-reg) :target res))
(:arg-types unsigned-num)
(:results (res :scs (unsigned-reg)))
(:result-types unsigned-num)
(:variant-vars slot)
(:generator 2
(storew arg mutator-tn slot)
(move res arg)))
(define-vop (mutator-descriptor-set mutator-ub32-set)
(:args (arg :scs (any-reg descriptor-reg null zero) :target res))
(:arg-types *)
(:results (res :scs (any-reg descriptor-reg)))
(:result-types *))
(define-vop (mutator-sap-set mutator-ub32-set)
(:args (arg :scs (sap-reg) :target res))
(:arg-types system-area-pointer)
(:results (res :scs (sap-reg)))
(:result-types system-area-pointer))
(macrolet ((define-mutator-accessors (slot type writable)
(let ((ref (symbolicate "MUTATOR-" slot "-REF"))
(set (and writable (symbolicate "MUTATOR-" slot "-SET")))
(offset (symbolicate "MUTATOR-" slot "-SLOT"))
(fn
(let ((*package* (find-package :kernel)))
(symbolicate "MUTATOR-" slot))))
(multiple-value-bind
(lisp-type ref-vop set-vop)
(ecase type
(:des
(values t
'mutator-descriptor-ref
'mutator-descriptor-set))
(:ub32
(values '(unsigned-byte 32)
'mutator-ub32-ref
'mutator-ub32-set))
(:sap
(values 'system-area-pointer
'mutator-sap-ref
'mutator-sap-set)))
`(progn
(export ',fn :kernel)
(defknown ,fn () ,lisp-type (flushable))
(define-vop (,ref ,ref-vop)
(:translate ,fn)
(:variant ,offset))
,@(when writable
`((defknown ((setf ,fn)) (,lisp-type) ,lisp-type
(unsafe))
(define-vop (,set ,set-vop)
(:translate (setf ,fn))
(:variant ,offset)))))))))
(define-mutator-accessors thread :des t)
(define-mutator-accessors suspends-disabled-count :ub32 t)
(define-mutator-accessors suspend-pending :ub32 t)
(define-mutator-accessors control-stack-base :sap nil)
(define-mutator-accessors control-stack-end :sap nil)
(define-mutator-accessors current-unwind-protect :sap nil)
(define-mutator-accessors current-catch-block :sap nil)
(define-mutator-accessors binding-stack-base :sap nil)
(define-mutator-accessors binding-stack-end :sap nil)
(define-mutator-accessors number-stack-base :sap nil)
(define-mutator-accessors number-stack-end :sap nil)
(define-mutator-accessors nursery-start :sap nil)
(define-mutator-accessors nursery-end :sap nil)
(define-mutator-accessors storebuf-start :sap nil)
(define-mutator-accessors storebuf-end :sap nil)
(define-mutator-accessors words-consed :ub32 nil))
); #+gengc progn
;;;; raw instance slot accessors
(define-vop (raw-instance-ref/word)
(:translate %raw-instance-ref/word)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(index :scs (any-reg)))
(:arg-types * positive-fixnum)
(:results (value :scs (unsigned-reg)))
(:temporary (:scs (non-descriptor-reg)) offset)
(:temporary (:scs (interior-reg)) lip)
(:result-types unsigned-num)
(:generator 5
(loadw offset object 0 instance-pointer-lowtag)
(inst srl offset n-widetag-bits offset)
(inst sll offset 2 offset)
(inst subq offset index offset)
(inst subq offset n-word-bytes offset)
(inst addq object offset lip)
(inst ldl
value
(- (* instance-slots-offset n-word-bytes)
instance-pointer-lowtag)
lip)
(inst mskll value 4 value)))
(define-vop (raw-instance-set/word)
(:translate %raw-instance-set/word)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(index :scs (any-reg))
(value :scs (unsigned-reg)))
(:arg-types * positive-fixnum unsigned-num)
(:results (result :scs (unsigned-reg)))
(:temporary (:scs (non-descriptor-reg)) offset)
(:temporary (:scs (interior-reg)) lip)
(:result-types unsigned-num)
(:generator 5
(loadw offset object 0 instance-pointer-lowtag)
(inst srl offset n-widetag-bits offset)
(inst sll offset 2 offset)
(inst subq offset index offset)
(inst subq offset n-word-bytes offset)
(inst addq object offset lip)
(inst stl
value
(- (* instance-slots-offset n-word-bytes)
instance-pointer-lowtag)
lip)
(move value result)))
(define-vop (raw-instance-ref/single)
(:translate %raw-instance-ref/single)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(index :scs (any-reg)))
(:arg-types * positive-fixnum)
(:results (value :scs (single-reg)))
(:temporary (:scs (non-descriptor-reg)) offset)
(:temporary (:scs (interior-reg)) lip)
(:result-types single-float)
(:generator 5
(loadw offset object 0 instance-pointer-lowtag)
(inst srl offset n-widetag-bits offset)
(inst sll offset 2 offset)
(inst subq offset index offset)
(inst subq offset n-word-bytes offset)
(inst addq object offset lip)
(inst lds
value
(- (* instance-slots-offset n-word-bytes)
instance-pointer-lowtag)
lip)))
(define-vop (raw-instance-set/single)
(:translate %raw-instance-set/single)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(index :scs (any-reg))
(value :scs (single-reg)))
(:arg-types * positive-fixnum single-float)
(:results (result :scs (single-reg)))
(:temporary (:scs (non-descriptor-reg)) offset)
(:temporary (:scs (interior-reg)) lip)
(:result-types single-float)
(:generator 5
(loadw offset object 0 instance-pointer-lowtag)
(inst srl offset n-widetag-bits offset)
(inst sll offset 2 offset)
(inst subq offset index offset)
(inst subq offset n-word-bytes offset)
(inst addq object offset lip)
(inst sts
value
(- (* instance-slots-offset n-word-bytes)
instance-pointer-lowtag)
lip)
(unless (location= result value)
(inst fmove value result))))
(define-vop (raw-instance-ref/double)
(:translate %raw-instance-ref/double)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(index :scs (any-reg)))
(:arg-types * positive-fixnum)
(:results (value :scs (double-reg)))
(:temporary (:scs (non-descriptor-reg)) offset)
(:temporary (:scs (interior-reg)) lip)
(:result-types double-float)
(:generator 5
(loadw offset object 0 instance-pointer-lowtag)
(inst srl offset n-widetag-bits offset)
(inst sll offset 2 offset)
(inst subq offset index offset)
(inst subq offset (* 2 n-word-bytes) offset)
(inst addq object offset lip)
(inst ldt
value
(- (* instance-slots-offset n-word-bytes)
instance-pointer-lowtag)
lip)))
(define-vop (raw-instance-set/double)
(:translate %raw-instance-set/double)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(index :scs (any-reg))
(value :scs (double-reg)))
(:arg-types * positive-fixnum double-float)
(:results (result :scs (double-reg)))
(:temporary (:scs (non-descriptor-reg)) offset)
(:temporary (:scs (interior-reg)) lip)
(:result-types double-float)
(:generator 5
(loadw offset object 0 instance-pointer-lowtag)
(inst srl offset n-widetag-bits offset)
(inst sll offset 2 offset)
(inst subq offset index offset)
(inst subq offset (* 2 n-word-bytes) offset)
(inst addq object offset lip)
(inst stt
value
(- (* instance-slots-offset n-word-bytes)
instance-pointer-lowtag)
lip)
(unless (location= result value)
(inst fmove value result))))
(define-vop (raw-instance-ref/complex-single)
(:translate %raw-instance-ref/complex-single)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(index :scs (any-reg)))
(:arg-types * positive-fixnum)
(:results (value :scs (complex-single-reg)))
(:temporary (:scs (non-descriptor-reg)) offset)
(:temporary (:scs (interior-reg)) lip)
(:result-types complex-single-float)
(:generator 5
(loadw offset object 0 instance-pointer-lowtag)
(inst srl offset n-widetag-bits offset)
(inst sll offset 2 offset)
(inst subq offset index offset)
(inst subq offset (* 2 n-word-bytes) offset)
(inst addq object offset lip)
(inst lds
(complex-double-reg-real-tn value)
(- (* instance-slots-offset n-word-bytes)
instance-pointer-lowtag)
lip)
(inst lds
(complex-double-reg-imag-tn value)
(- (* (1+ instance-slots-offset) n-word-bytes)
instance-pointer-lowtag)
lip)))
(define-vop (raw-instance-set/complex-single)
(:translate %raw-instance-set/complex-single)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(index :scs (any-reg))
(value :scs (complex-single-reg)))
(:arg-types * positive-fixnum complex-single-float)
(:results (result :scs (complex-single-reg)))
(:temporary (:scs (non-descriptor-reg)) offset)
(:temporary (:scs (interior-reg)) lip)
(:result-types complex-single-float)
(:generator 5
(loadw offset object 0 instance-pointer-lowtag)
(inst srl offset n-widetag-bits offset)
(inst sll offset 2 offset)
(inst subq offset index offset)
(inst subq offset (* 2 n-word-bytes) offset)
(inst addq object offset lip)
(let ((value-real (complex-single-reg-real-tn value))
(result-real (complex-single-reg-real-tn result)))
(inst sts
value-real
(- (* instance-slots-offset n-word-bytes)
instance-pointer-lowtag)
lip)
(unless (location= result-real value-real)
(inst fmove value-real result-real)))
(let ((value-imag (complex-single-reg-imag-tn value))
(result-imag (complex-single-reg-imag-tn result)))
(inst sts
value-imag
(- (* (1+ instance-slots-offset) n-word-bytes)
instance-pointer-lowtag)
lip)
(unless (location= result-imag value-imag)
(inst fmove value-imag result-imag)))))
(define-vop (raw-instance-ref/complex-double)
(:translate %raw-instance-ref/complex-double)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(index :scs (any-reg)))
(:arg-types * positive-fixnum)
(:results (value :scs (complex-double-reg)))
(:temporary (:scs (non-descriptor-reg)) offset)
(:temporary (:scs (interior-reg)) lip)
(:result-types complex-double-float)
(:generator 5
(loadw offset object 0 instance-pointer-lowtag)
(inst srl offset n-widetag-bits offset)
(inst sll offset 2 offset)
(inst subq offset index offset)
(inst subq offset (* 4 n-word-bytes) offset)
(inst addq object offset lip)
(inst ldt
(complex-double-reg-real-tn value)
(- (* instance-slots-offset n-word-bytes)
instance-pointer-lowtag)
lip)
(inst ldt
(complex-double-reg-imag-tn value)
(- (* (+ instance-slots-offset 2) n-word-bytes)
instance-pointer-lowtag)
lip)))
(define-vop (raw-instance-set/complex-double)
(:translate %raw-instance-set/complex-double)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(index :scs (any-reg))
(value :scs (complex-double-reg)))
(:arg-types * positive-fixnum complex-double-float)
(:results (result :scs (complex-double-reg)))
(:temporary (:scs (non-descriptor-reg)) offset)
(:temporary (:scs (interior-reg)) lip)
(:result-types complex-double-float)
(:generator 5
(loadw offset object 0 instance-pointer-lowtag)
(inst srl offset n-widetag-bits offset)
(inst sll offset 2 offset)
(inst subq offset index offset)
(inst subq offset (* 4 n-word-bytes) offset)
(inst addq object offset lip)
(let ((value-real (complex-double-reg-real-tn value))
(result-real (complex-double-reg-real-tn result)))
(inst stt
value-real
(- (* instance-slots-offset n-word-bytes)
instance-pointer-lowtag)
lip)
(unless (location= result-real value-real)
(inst fmove value-real result-real)))
(let ((value-imag (complex-double-reg-imag-tn value))
(result-imag (complex-double-reg-imag-tn result)))
(inst stt
value-imag
(- (* (+ instance-slots-offset 2) n-word-bytes)
instance-pointer-lowtag)
lip)
(unless (location= result-imag value-imag)
(inst fmove value-imag result-imag)))))