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cell.lisp    1000 lines (903 with data), 39.5 kB

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;;;; various primitive memory access VOPs for the x86 VM
;;;; 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 immediate)))
(:temporary (:sc descriptor-reg) temp)
(:info name offset lowtag)
(:ignore name)
(:results)
(:generator 1
(if (sc-is value immediate)
(let ((val (tn-value value)))
(move-immediate (make-ea :qword
:base object
:disp (- (* offset n-word-bytes)
lowtag))
(etypecase val
(integer
(fixnumize val))
(symbol
(+ nil-value (static-symbol-offset val)))
(character
(logior (ash (char-code val) n-widetag-bits)
character-widetag)))
temp))
;; Else, value not immediate.
(storew value object offset lowtag))))
(define-vop (init-slot set-slot))
(define-vop (compare-and-swap-slot)
(:args (object :scs (descriptor-reg) :to :eval)
(old :scs (descriptor-reg any-reg) :target rax)
(new :scs (descriptor-reg any-reg)))
(:temporary (:sc descriptor-reg :offset rax-offset
:from (:argument 1) :to :result :target result)
rax)
(:info name offset lowtag)
(:ignore name)
(:results (result :scs (descriptor-reg any-reg)))
(:generator 5
(move rax old)
(inst cmpxchg (make-ea :qword :base object
:disp (- (* offset n-word-bytes) lowtag))
new :lock)
(move result rax)))
;;;; symbol hacking VOPs
(macrolet (;; Logic common to thread-aware SET and CAS. CELL is assigned
;; to the location that should be accessed to modify SYMBOL's
;; value either in the TLS or the symbol's value slot as follows:
;; (1) make it look as if the TLS cell were a symbol by biasing
;; upward by other-pointer-lowtag less 1 word.
;; (2) conditionally make CELL point to the symbol itself
(compute-virtual-symbol ()
`(progn
(inst mov (reg-in-size cell :dword) (tls-index-of symbol))
(inst lea cell
(make-ea :qword :base thread-base-tn :index cell
:disp (- other-pointer-lowtag
(ash symbol-value-slot word-shift))))
(inst cmp (access-value-slot cell :dword) ; TLS reference
no-tls-value-marker-widetag)
(inst cmov :e cell symbol))) ; now possibly get the symbol
(tls-index-of (sym)
`(make-ea-for-object-slot-half ,sym symbol-tls-index-slot
other-pointer-lowtag))
(access-tls-val (index size)
`(make-ea ,size :base thread-base-tn :index ,index :scale 1))
(access-value-slot (sym &optional (size :qword))
(ecase size
(:dword `(make-ea-for-object-slot-half
,sym symbol-value-slot other-pointer-lowtag))
(:qword `(make-ea-for-object-slot
,sym symbol-value-slot other-pointer-lowtag)))))
;; FIXME: this incorrectly indentated code results from minimizing a diff.
;; Attempting to reorder, reimplement, and reindent the #![-+]sb-thread cases
;; left the code so unintelligible that the author could not parse it.
(define-vop (%compare-and-swap-symbol-value)
(:translate %compare-and-swap-symbol-value)
(:args (symbol :scs (descriptor-reg) :to (:result 0))
(old :scs (descriptor-reg any-reg) :target rax)
(new :scs (descriptor-reg any-reg)))
(:temporary (:sc descriptor-reg :offset rax-offset
:from (:argument 1) :to (:result 0)) rax)
#!+sb-thread
(:temporary (:sc descriptor-reg :to (:result 0)) cell)
(:results (result :scs (descriptor-reg any-reg)))
(:policy :fast-safe)
(:vop-var vop)
(:generator 15
;; This code has two pathological cases: NO-TLS-VALUE-MARKER
;; or UNBOUND-MARKER as NEW: in either case we would end up
;; doing possible damage with CMPXCHG -- so don't do that!
;; Even worse: don't supply old=NO-TLS-VALUE with a symbol whose
;; tls-index=0, because that would succeed, assigning NEW to each
;; symbol in existence having otherwise no thread-local value.
(let ((unbound (generate-error-code vop 'unbound-symbol-error symbol)))
#!+sb-thread (progn (compute-virtual-symbol)
(move rax old)
(inst cmpxchg (access-value-slot cell) new :lock))
#!-sb-thread (progn (move rax old)
;; is the :LOCK is necessary?
(inst cmpxchg (access-value-slot symbol) new :lock))
(inst cmp (reg-in-size rax :dword) unbound-marker-widetag)
(inst jmp :e unbound)
(move result rax))))
(define-vop (%set-symbol-global-value cell-set)
(:variant symbol-value-slot other-pointer-lowtag))
(define-vop (fast-symbol-global-value cell-ref)
(:variant symbol-value-slot other-pointer-lowtag)
(:policy :fast)
(:translate symbol-global-value))
(define-vop (symbol-global-value)
(:policy :fast-safe)
(:translate symbol-global-value)
(:args (object :scs (descriptor-reg) :to (:result 1)))
(:results (value :scs (descriptor-reg any-reg)))
(:vop-var vop)
(:save-p :compute-only)
(:generator 9
(let ((err-lab (generate-error-code vop 'unbound-symbol-error object)))
(loadw value object symbol-value-slot other-pointer-lowtag)
(inst cmp (reg-in-size value :dword) unbound-marker-widetag)
(inst jmp :e err-lab))))
#!+sb-thread
(progn
(define-vop (set)
(:args (symbol :scs (descriptor-reg))
(value :scs (descriptor-reg any-reg)))
(:temporary (:sc descriptor-reg) cell)
(:generator 4
;; Compute the address into which to store. CMOV can only move into
;; a register, so we can't conditionally move into the TLS and
;; conditionally move in the opposite flag sense to the symbol.
(compute-virtual-symbol)
(inst mov (access-value-slot cell) value)))
;; With Symbol-Value, we check that the value isn't the trap object. So
;; Symbol-Value of NIL is NIL.
(define-vop (symbol-value)
(:translate symbol-value)
(:policy :fast-safe)
(:args (symbol :scs (descriptor-reg)))
(:temporary (:sc unsigned-reg) temp)
(:results (value :scs (descriptor-reg any-reg)))
(:vop-var vop)
(:save-p :compute-only)
(:generator 9
(let ((err-lab (generate-error-code vop 'unbound-symbol-error symbol)))
;; The order of the first two instructions matters- SYMBOL and VALUE
;; might arbitrarily be packed in the same register, or not.
(inst mov (reg-in-size temp :dword) (tls-index-of symbol))
(inst mov value (access-value-slot symbol))
(inst cmp (access-tls-val temp :dword) no-tls-value-marker-widetag)
(inst cmov :ne value (access-tls-val temp :qword))
(inst cmp (reg-in-size value :dword) unbound-marker-widetag)
(inst jmp :e err-lab))))
(define-vop (fast-symbol-value symbol-value)
;; KLUDGE: not really fast, in fact, because we're going to have to
;; do a full lookup of the thread-local area anyway. But half of
;; the meaning of FAST-SYMBOL-VALUE is "do not signal an error if
;; unbound", which is used in the implementation of COPY-SYMBOL. --
;; CSR, 2003-04-22
(:policy :fast)
(:args (symbol :scs (descriptor-reg) :target temp))
(:temporary (:sc unsigned-reg :from (:argument 0)) temp)
(:translate symbol-value)
(:generator 8
(inst mov value (access-value-slot symbol)) ; prefetch
;; We're going to lose the symbol, because it should be in the same
;; register as TEMP. That's ok, we don't need it for error signaling.
(inst mov (reg-in-size temp :dword) (tls-index-of symbol))
(inst cmp (access-tls-val temp :dword) no-tls-value-marker-widetag)
(inst cmov :ne value (access-tls-val temp :qword)))))
#!-sb-thread
(progn
(define-vop (symbol-value symbol-global-value)
(:translate symbol-value))
(define-vop (fast-symbol-value fast-symbol-global-value)
(:translate symbol-value))
(define-vop (set %set-symbol-global-value)))
#!+sb-thread
(define-vop (boundp)
(:translate boundp)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg)))
(:conditional :ne)
(:temporary (:sc dword-reg) temp)
(:generator 9
(inst mov temp (tls-index-of object))
(inst mov temp (access-tls-val temp :dword))
(inst cmp temp no-tls-value-marker-widetag)
(inst cmov :e temp (access-value-slot object :dword))
(inst cmp temp unbound-marker-widetag)))
#!-sb-thread
(define-vop (boundp)
(:translate boundp)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg)))
(:conditional :ne)
(:generator 9
(inst cmp (access-value-slot object :dword) unbound-marker-widetag)))
) ; END OF MACROLET
(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 three 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 and res (lognot fixnum-tag-mask))))
;;;; fdefinition (FDEFN) objects
(define-vop (fdefn-fun cell-ref) ; /pfw - alpha
(:variant fdefn-fun-slot other-pointer-lowtag))
(define-vop (safe-fdefn-fun)
(:args (object :scs (descriptor-reg) :to (:result 1)))
(:results (value :scs (descriptor-reg any-reg)))
(:vop-var vop)
(:save-p :compute-only)
(:generator 10
(loadw value object fdefn-fun-slot other-pointer-lowtag)
(inst cmp value nil-value)
(let ((err-lab (generate-error-code vop 'undefined-fun-error object)))
(inst jmp :e 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 (:sc unsigned-reg) raw)
(:temporary (:sc unsigned-reg) type)
(:results (result :scs (descriptor-reg)))
(:generator 38
(load-type type function (- fun-pointer-lowtag))
(inst lea raw
(make-ea :byte :base function
:disp (- (* simple-fun-code-offset n-word-bytes)
fun-pointer-lowtag)))
(inst cmp (reg-in-size type :byte) simple-fun-header-widetag)
(inst jmp :e NORMAL-FUN)
(inst mov raw (make-fixup "closure_tramp" :foreign))
NORMAL-FUN
(storew function fdefn fdefn-fun-slot other-pointer-lowtag)
(storew raw fdefn fdefn-raw-addr-slot other-pointer-lowtag)
(move result function)))
(define-vop (fdefn-makunbound)
(:policy :fast-safe)
(:translate fdefn-makunbound)
(:args (fdefn :scs (descriptor-reg) :target result))
(:results (result :scs (descriptor-reg)))
(:generator 38
(storew nil-value fdefn fdefn-fun-slot other-pointer-lowtag)
(storew (make-fixup "undefined_tramp" :foreign)
fdefn fdefn-raw-addr-slot other-pointer-lowtag)
(move result fdefn)))
;;;; binding and unbinding
;;; BIND -- 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.
;;; See the "Chapter 9: Specials" of the SBCL Internals Manual.
#!+sb-thread
(define-vop (bind)
(:args (val :scs (any-reg descriptor-reg))
(symbol :scs (descriptor-reg) :target tmp
:to :load))
(:temporary (:sc unsigned-reg) tls-index bsp tmp)
(:generator 10
(load-binding-stack-pointer bsp)
(loadw tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
(inst add bsp (* binding-size n-word-bytes))
(store-binding-stack-pointer bsp)
(inst test tls-index tls-index)
(inst jmp :ne TLS-INDEX-VALID)
(inst mov tls-index symbol)
(inst mov tmp (subprimitive-tls-allocator tls-index))
(inst call tmp)
TLS-INDEX-VALID
(inst mov tmp (make-ea :qword :base thread-base-tn :index tls-index))
(storew tmp bsp (- binding-value-slot binding-size))
(storew tls-index bsp (- binding-symbol-slot binding-size))
(inst mov (make-ea :qword :base thread-base-tn :index tls-index) val)))
#!+sb-thread
;; Nikodemus hypothetically terms the above VOP DYNBIND (in x86/cell.lisp)
;; with this "new" one being BIND, but to re-purpose concepts in that way
;; - though it be rational - is fraught with peril.
;; So BIND/LET is for (LET ((*a-special* ...)))
;;
(define-vop (bind/let)
(:args (val :scs (any-reg descriptor-reg)))
(:temporary (:sc unsigned-reg) bsp tmp)
(:info symbol)
(:generator 10
(inst mov bsp (* binding-size n-word-bytes))
(inst xadd
(make-ea :qword :base thread-base-tn
:disp (ash thread-binding-stack-pointer-slot word-shift))
bsp)
(let* ((tls-index (or (symbol-known-tls-index symbol)
(make-fixup symbol :symbol-tls-index)))
(tls-cell (make-ea :qword :base thread-base-tn :disp tls-index)))
;; Too bad we can't use "XCHG [r12+disp], val" to write the new value
;; and read the old value in one step. It will violate the constraints
;; prescribed in the internal documentation on special binding.
(inst mov tmp tls-cell)
(storew tmp bsp binding-value-slot)
;; Indices are small enough to be written as :DWORDs which avoids
;; a REX prefix if 'bsp' happens to be any of the low 8 registers.
(inst mov (make-ea :dword :base bsp
:disp (ash binding-symbol-slot word-shift)) tls-index)
(inst mov tls-cell val))
;; Emission of this VOP informs the compiler that later SYMBOL-VALUE calls
;; might want to use a load-time fixup instead of reading from the symbol's
;; tls-index, admitting a possible optimization (NOT DONE):
;; MOV RES,[R12+N] ; CMP RES,NO_TLS_VALUE ; CMOV :E RES,GLOBAL-VALUE
;; In contrast, if the symbol is not known to ever have been thread-locally
;; bound, reading it should not force the loader to assign a TLS index.
(setf (info :variable :wired-tls-index symbol) t)))
#!-sb-thread
(define-vop (bind)
(:args (val :scs (any-reg descriptor-reg))
(symbol :scs (descriptor-reg)))
(:temporary (:sc unsigned-reg) temp bsp)
(:generator 5
(load-symbol-value bsp *binding-stack-pointer*)
(loadw temp symbol symbol-value-slot other-pointer-lowtag)
(inst add bsp (* binding-size n-word-bytes))
(store-symbol-value bsp *binding-stack-pointer*)
(storew temp bsp (- binding-value-slot binding-size))
(storew symbol bsp (- binding-symbol-slot binding-size))
(storew val symbol symbol-value-slot other-pointer-lowtag)))
#!+sb-thread
(define-vop (unbind)
(:temporary (:sc unsigned-reg) temp bsp tls-index)
(:generator 0
(load-binding-stack-pointer bsp)
(inst sub bsp (* binding-size n-word-bytes))
;; Load TLS-INDEX of the SYMBOL from stack
(loadw tls-index bsp binding-symbol-slot)
;; Load VALUE from stack, then restore it to the TLS area.
(loadw temp bsp binding-value-slot)
(inst mov (make-ea :qword :base thread-base-tn :index tls-index)
temp)
;; Zero out the stack.
(zeroize temp)
(storew temp bsp binding-symbol-slot)
(storew temp bsp binding-value-slot)
(store-binding-stack-pointer bsp)))
#!-sb-thread
(define-vop (unbind)
(:temporary (:sc unsigned-reg) symbol value bsp)
(:generator 0
(load-symbol-value bsp *binding-stack-pointer*)
(loadw symbol bsp (- binding-symbol-slot binding-size))
(loadw value bsp (- binding-value-slot binding-size))
(storew value symbol symbol-value-slot other-pointer-lowtag)
(storew 0 bsp (- binding-symbol-slot binding-size))
(storew 0 bsp (- binding-value-slot binding-size))
(inst sub bsp (* binding-size n-word-bytes))
(store-symbol-value bsp *binding-stack-pointer*)))
(define-vop (unbind-to-here)
(:args (where :scs (descriptor-reg any-reg)))
(:temporary (:sc unsigned-reg) symbol value bsp zero)
(:generator 0
(load-binding-stack-pointer bsp)
(inst cmp where bsp)
(inst jmp :e DONE)
(zeroize zero)
LOOP
(inst sub bsp (* binding-size n-word-bytes))
;; on sb-thread symbol is actually a tls-index
(loadw symbol bsp binding-symbol-slot)
(inst test symbol symbol)
(inst jmp :z SKIP)
;; Bind stack debug sentinels have the unbound marker in the symbol slot
(inst cmp symbol unbound-marker-widetag)
(inst jmp :eq SKIP)
(loadw value bsp binding-value-slot)
#!-sb-thread
(storew value symbol symbol-value-slot other-pointer-lowtag)
#!+sb-thread
(inst mov (make-ea :qword :base thread-base-tn :index symbol)
value)
(storew zero bsp binding-symbol-slot)
SKIP
(storew zero bsp binding-value-slot)
(inst cmp where bsp)
(inst jmp :ne LOOP)
(store-binding-stack-pointer bsp)
DONE))
(define-vop (bind-sentinel)
(:temporary (:sc unsigned-reg) bsp)
(:generator 1
(load-binding-stack-pointer bsp)
(inst add bsp (* binding-size n-word-bytes))
(storew unbound-marker-widetag bsp (- binding-symbol-slot binding-size))
(storew rbp-tn bsp (- binding-value-slot binding-size))
(store-binding-stack-pointer bsp)))
(define-vop (unbind-sentinel)
(:temporary (:sc unsigned-reg) bsp)
(:generator 1
(load-binding-stack-pointer bsp)
(storew 0 bsp (- binding-value-slot binding-size))
(storew 0 bsp (- binding-symbol-slot binding-size))
(inst sub bsp (* binding-size n-word-bytes))
(store-binding-stack-pointer bsp)))
;;;; closure indexing
(define-full-reffer closure-index-ref *
closure-info-offset fun-pointer-lowtag
(any-reg descriptor-reg) * %closure-index-ref)
(define-full-setter set-funcallable-instance-info *
funcallable-instance-info-offset fun-pointer-lowtag
(any-reg descriptor-reg) * %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 (closure-ref slot-ref)
(:variant closure-info-offset fun-pointer-lowtag))
(define-vop (closure-init slot-set)
(:variant closure-info-offset fun-pointer-lowtag))
(define-vop (closure-init-from-fp)
(:args (object :scs (descriptor-reg)))
(:info offset)
(:generator 4
(storew rbp-tn object (+ closure-info-offset 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))
;;;; structure 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 shr res n-widetag-bits)))
(define-full-reffer instance-index-ref * instance-slots-offset
instance-pointer-lowtag (any-reg descriptor-reg) * %instance-ref)
(define-full-setter instance-index-set * instance-slots-offset
instance-pointer-lowtag (any-reg descriptor-reg) * %instance-set)
(define-full-compare-and-swap %compare-and-swap-instance-ref instance
instance-slots-offset instance-pointer-lowtag
(any-reg descriptor-reg) *
%compare-and-swap-instance-ref)
;;;; code object frobbing
(define-full-reffer code-header-ref * 0 other-pointer-lowtag
(any-reg descriptor-reg) * code-header-ref)
(define-full-setter code-header-set * 0 other-pointer-lowtag
(any-reg descriptor-reg) * code-header-set)
;;;; raw instance slot accessors
(defun make-ea-for-raw-slot (object instance-length
&key (index nil) (adjustment 0) (scale 1))
(if (integerp instance-length)
;; For RAW-INSTANCE-INIT/* VOPs, which know the exact instance length
;; at compile time.
(make-ea :qword
:base object
:disp (+ (* (- instance-length instance-slots-offset index)
n-word-bytes)
(- instance-pointer-lowtag)
adjustment))
(etypecase index
(null
(make-ea :qword :base object :index instance-length :scale scale
:disp (+ (* (1- instance-slots-offset) n-word-bytes)
(- instance-pointer-lowtag)
adjustment)))
(integer
(make-ea :qword :base object :index instance-length
:scale 8
:disp (+ (* (1- instance-slots-offset) n-word-bytes)
(- instance-pointer-lowtag)
adjustment
(* index (- n-word-bytes))))))))
(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 * tagged-num)
(:temporary (:sc unsigned-reg) tmp)
(:results (value :scs (unsigned-reg)))
(:result-types unsigned-num)
(:generator 5
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst shl tmp n-fixnum-tag-bits)
(inst sub tmp index)
(inst mov value (make-ea-for-raw-slot object tmp :scale (ash 1 (- word-shift n-fixnum-tag-bits))))))
(define-vop (raw-instance-ref-c/word)
(:translate %raw-instance-ref/word)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg)))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset)))
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (value :scs (unsigned-reg)))
(:result-types unsigned-num)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst mov value (make-ea-for-raw-slot object tmp :index index))))
(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) :target result))
(:arg-types * tagged-num unsigned-num)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (unsigned-reg)))
(:result-types unsigned-num)
(:generator 5
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst shl tmp n-fixnum-tag-bits)
(inst sub tmp index)
(inst mov (make-ea-for-raw-slot object tmp :scale (ash 1 (- word-shift n-fixnum-tag-bits))) value)
(move result value)))
(define-vop (raw-instance-set-c/word)
(:translate %raw-instance-set/word)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(value :scs (unsigned-reg) :target result))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset))
unsigned-num)
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (unsigned-reg)))
(:result-types unsigned-num)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst mov (make-ea-for-raw-slot object tmp :index index) value)
(move result value)))
(define-vop (raw-instance-init/word)
(:args (object :scs (descriptor-reg))
(value :scs (unsigned-reg)))
(:arg-types * unsigned-num)
(:info instance-length index)
(:generator 4
(inst mov (make-ea-for-raw-slot object instance-length :index index) value)))
(define-vop (raw-instance-atomic-incf-c/word)
(:translate %raw-instance-atomic-incf/word)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(diff :scs (unsigned-reg) :target result))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset))
unsigned-num)
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (unsigned-reg)))
(:result-types unsigned-num)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst xadd (make-ea-for-raw-slot object tmp :index index) diff :lock)
(move result diff)))
(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)
(:temporary (:sc unsigned-reg) tmp)
(:results (value :scs (single-reg)))
(:result-types single-float)
(:generator 5
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst shl tmp n-fixnum-tag-bits)
(inst sub tmp index)
(inst movss value (make-ea-for-raw-slot object tmp :scale (ash 1 (- word-shift n-fixnum-tag-bits))))))
(define-vop (raw-instance-ref-c/single)
(:translate %raw-instance-ref/single)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg)))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset)))
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (value :scs (single-reg)))
(:result-types single-float)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst movss value (make-ea-for-raw-slot object tmp :index index))))
(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) :target result))
(:arg-types * positive-fixnum single-float)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (single-reg)))
(:result-types single-float)
(:generator 5
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst shl tmp n-fixnum-tag-bits)
(inst sub tmp index)
(inst movss (make-ea-for-raw-slot object tmp :scale (ash 1 (- word-shift n-fixnum-tag-bits))) value)
(move result value)))
(define-vop (raw-instance-set-c/single)
(:translate %raw-instance-set/single)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(value :scs (single-reg) :target result))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset))
single-float)
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (single-reg)))
(:result-types single-float)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst movss (make-ea-for-raw-slot object tmp :index index) value)
(move result value)))
(define-vop (raw-instance-init/single)
(:args (object :scs (descriptor-reg))
(value :scs (single-reg)))
(:arg-types * single-float)
(:info instance-length index)
(:generator 4
(inst movss (make-ea-for-raw-slot object instance-length :index index) value)))
(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)
(:temporary (:sc unsigned-reg) tmp)
(:results (value :scs (double-reg)))
(:result-types double-float)
(:generator 5
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst shl tmp n-fixnum-tag-bits)
(inst sub tmp index)
(inst movsd value (make-ea-for-raw-slot object tmp :scale (ash 1 (- word-shift n-fixnum-tag-bits))))))
(define-vop (raw-instance-ref-c/double)
(:translate %raw-instance-ref/double)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg)))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset)))
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (value :scs (double-reg)))
(:result-types double-float)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst movsd value (make-ea-for-raw-slot object tmp :index index))))
(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) :target result))
(:arg-types * positive-fixnum double-float)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (double-reg)))
(:result-types double-float)
(:generator 5
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst shl tmp n-fixnum-tag-bits)
(inst sub tmp index)
(inst movsd (make-ea-for-raw-slot object tmp :scale (ash 1 (- word-shift n-fixnum-tag-bits))) value)
(move result value)))
(define-vop (raw-instance-set-c/double)
(:translate %raw-instance-set/double)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(value :scs (double-reg) :target result))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset))
double-float)
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (double-reg)))
(:result-types double-float)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst movsd (make-ea-for-raw-slot object tmp :index index) value)
(move result value)))
(define-vop (raw-instance-init/double)
(:args (object :scs (descriptor-reg))
(value :scs (double-reg)))
(:arg-types * double-float)
(:info instance-length index)
(:generator 4
(inst movsd (make-ea-for-raw-slot object instance-length :index index) value)))
(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)
(:temporary (:sc unsigned-reg) tmp)
(:results (value :scs (complex-single-reg)))
(:result-types complex-single-float)
(:generator 5
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst shl tmp n-fixnum-tag-bits)
(inst sub tmp index)
(inst movq value (make-ea-for-raw-slot object tmp :scale (ash 1 (- word-shift n-fixnum-tag-bits))))))
(define-vop (raw-instance-ref-c/complex-single)
(:translate %raw-instance-ref/complex-single)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg)))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset)))
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (value :scs (complex-single-reg)))
(:result-types complex-single-float)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst movq value (make-ea-for-raw-slot object tmp :index index))))
(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) :target result))
(:arg-types * positive-fixnum complex-single-float)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (complex-single-reg)))
(:result-types complex-single-float)
(:generator 5
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst shl tmp n-fixnum-tag-bits)
(inst sub tmp index)
(move result value)
(inst movq (make-ea-for-raw-slot object tmp :scale (ash 1 (- word-shift n-fixnum-tag-bits))) value)))
(define-vop (raw-instance-set-c/complex-single)
(:translate %raw-instance-set/complex-single)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(value :scs (complex-single-reg) :target result))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset))
complex-single-float)
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (complex-single-reg)))
(:result-types complex-single-float)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(move result value)
(inst movq (make-ea-for-raw-slot object tmp :index index) value)))
(define-vop (raw-instance-init/complex-single)
(:args (object :scs (descriptor-reg))
(value :scs (complex-single-reg)))
(:arg-types * complex-single-float)
(:info instance-length index)
(:generator 4
(inst movq (make-ea-for-raw-slot object instance-length :index index) value)))
(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)
(:temporary (:sc unsigned-reg) tmp)
(:results (value :scs (complex-double-reg)))
(:result-types complex-double-float)
(:generator 5
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst shl tmp n-fixnum-tag-bits)
(inst sub tmp index)
(inst movdqu value (make-ea-for-raw-slot object tmp :scale (ash 1 (- word-shift n-fixnum-tag-bits)) :adjustment -8))))
(define-vop (raw-instance-ref-c/complex-double)
(:translate %raw-instance-ref/complex-double)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg)))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset)))
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (value :scs (complex-double-reg)))
(:result-types complex-double-float)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst movdqu value (make-ea-for-raw-slot object tmp :index index :adjustment -8))))
(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) :target result))
(:arg-types * positive-fixnum complex-double-float)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (complex-double-reg)))
(:result-types complex-double-float)
(:generator 5
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(inst shl tmp n-fixnum-tag-bits)
(inst sub tmp index)
(move result value)
(inst movdqu (make-ea-for-raw-slot object tmp :scale (ash 1 (- word-shift n-fixnum-tag-bits)) :adjustment -8) value)))
(define-vop (raw-instance-set-c/complex-double)
(:translate %raw-instance-set/complex-double)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg))
(value :scs (complex-double-reg) :target result))
(:arg-types * (:constant (load/store-index #.n-word-bytes
#.instance-pointer-lowtag
#.instance-slots-offset))
complex-double-float)
(:info index)
(:temporary (:sc unsigned-reg) tmp)
(:results (result :scs (complex-double-reg)))
(:result-types complex-double-float)
(:generator 4
(loadw tmp object 0 instance-pointer-lowtag)
(inst shr tmp n-widetag-bits)
(move result value)
(inst movdqu (make-ea-for-raw-slot object tmp :index index :adjustment -8) value)))
(define-vop (raw-instance-init/complex-double)
(:args (object :scs (descriptor-reg))
(value :scs (complex-double-reg)))
(:arg-types * complex-double-float)
(:info instance-length index)
(:generator 4
(inst movdqu (make-ea-for-raw-slot object instance-length :index index :adjustment -8) value)))
#|
For lack of a better location for these comments about the manipulation
of static symbols, note that we now have unfortunately two ways of doing it.
The following code rebinds *ALIEN-STACK-POINTER* to itself,
then subtracts 16 bytes.
* (disassemble '(lambda () (with-alien ((x (array char 16))) (print x))))
1) Load the symbol into a register, load the tls-index from the symbol,
and access [thread_base+index]. This is an ordinary SYMBOL-VALUE call.
; B80F0B1020 MOV EAX, 537922319
; 488B5021 MOV RDX, [RAX+33]
; 498B1414 MOV RDX, [R12+RDX]
; 4883FA61 CMP RDX, 97
; 7504 JNE L0
; 488B50F9 MOV RDX, [RAX-7]
; L0: 4883FA51 CMP RDX, 81
; 0F84EC000000 JEQ L3
2) Use a constant offset from the thread-base. This is the BIND/LET VOP.
; 498B8C24A8000000 MOV RCX, [R12+168]
; 488908 MOV [RAX], RCX
; C74008A8000000 MOV DWORD PTR [RAX+8], 168
; 49899424A8000000 MOV [R12+168], RDX
We could benefit from additional INFO for special variables:
- an indicator of whether to prefer that SYMBOL-VALUE use a known tls-index.
This would be the same load-time mechanism as for BIND/LET. It is bad
to force the loader to assign a tls-index for all reads of a symbol in
general. Many symbols are never dynamically bound, and the potential number
of globals (not DEFGLOBAL necessarily) in use by some applications
could quickly exhaust the TLS.
- an indicator of whether the symbol will definitely have a thread-local
binding whenever it is read, such as for *ALIEN-STACK-POINTER*.
|#