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|
(load "vm-param")
(defstruct oc-base nil
(:static deprecated nil)
(:method synerr (me fmt . args)
(error `opcode @{me.symbol}: @fmt` . args))
(:method chk-arg-count (me n syntax)
(when (neq (length (rest syntax)) n)
me.(synerr "~s arguments required; ~s is invalid"
n syntax)))
(:method chk-arg-count-min (me n syntax)
(when (< (length (rest syntax)) n)
me.(synerr "~s arguments required; ~s is invalid"
n syntax)))
(:method backpatch (me asm at offs)
(ignore asm at offs)
(asm-error `@{me.symbol} doesn't backpatch`)))
(compile-only
(defstruct assembler nil
buf
bstr
(max-treg 0)
(labdef (hash))
(labref (hash))
(:static imm-width (relate '(si mi bi) '(10 16 32)))
(:static sign-bits (relate '(fixnum bignum chr) '(1 1 0)))
(:static operand-name (relate '(si mi bi l r rs d ds n o)
'("small immediate"
"medium immediate"
"big immediate"
"label"
"register operand"
"register small operand"
"register destination operand"
"register small destination operand"
"integer"
"any object")))))
(defmeth assembler :postinit (me)
(cond
(me.buf (set me.bstr (make-buf-stream me.buf)))
(me.bstr (set me.buf (get-buf-from-stream me.bstr)))
(t (set me.bstr (make-buf-stream)
me.buf (get-buf-from-stream me.bstr)))))
(defmeth assembler cur-pos (me)
(seek-stream me.bstr 0 :from-current))
(defmeth assembler set-pos (me pos)
(seek-stream me.bstr pos :from-start))
(defmeth assembler lookup-label (me sym oc)
(condlet
(((n [me.labdef sym])) n)
(t (push (cons oc (trunc me.(cur-pos) 4)) [me.labref sym])
0)))
(defmeth assembler define-label (me sym)
(let* ((pos me.(cur-pos))
(ins (trunc pos 4)))
(set [me.labdef sym] ins)
(each ((entry (del [me.labref sym])))
(tree-bind (oc . offs) entry
me.(set-pos (* 4 offs))
oc.(backpatch me (* 4 offs) ins)))
me.(set-pos pos)
ins))
(defmeth assembler read-buf (me bytes)
(let ((buf (make-buf bytes)))
(when (neql (fill-buf buf 0 me.bstr) bytes)
(asm-error "read past instruction block"))
buf))
(defmeth assembler put-word (me word)
(let* ((buf (make-buf 0)))
(buf-put-u32 buf 0 word)
(put-buf buf 0 me.bstr)))
(defmeth assembler put-insn (me code extension operand)
(let ((word (logior (ash code 26) (ash extension 16) operand))
(buf (make-buf 0)))
(buf-put-u32 buf 0 word)
(put-buf buf 0 me.bstr)))
(defmeth assembler put-pair (me op1 op2)
(let ((word (logior (ash op1 16) op2))
(buf (make-buf 0)))
(buf-put-u32 buf 0 word)
(put-buf buf 0 me.bstr)))
(defmeth assembler get-word (me)
(let* ((buf me.(read-buf (sizeof uint32))))
(buf-get-u32 buf 0)))
(defmeth assembler get-insn (me)
(let* ((buf me.(read-buf (sizeof uint32)))
(word (buf-get-u32 buf 0)))
(list (ash word -26)
(logtrunc (ash word -16) 10)
(logtrunc word 16))))
(defmeth assembler get-pair (me)
(let* ((buf me.(read-buf (sizeof uint32)))
(word (buf-get-u32 buf 0)))
(list (ash word -16) (logtrunc word 16))))
(defmeth assembler immediate-fits-type (me arg operand-type)
(and (member (typeof arg)
'(fixnum chr))
(<= (+ (width arg)
[me.sign-bits (typeof arg)]
2)
[me.imm-width operand-type])))
(defmeth assembler parse-args (me oc syntax pattern)
(mapcar (lambda (type arg n)
(let ((parg (caseql type
((si mi bi)
(when me.(immediate-fits-type arg type)
arg))
(l (cond
((is-label arg) me.(lookup-label arg oc))
((integerp arg) arg)))
(n (if (integerp arg) arg))
(o arg)
((r rs d ds)
(cond
((null arg) 0)
((consp arg)
(parse-compound-operand arg))
((symbolp arg)
(parse-operand (symbol-name arg)))))
(t (asm-error "invalid arg type spec ~s" type)))))
(unless (or parg (eq type 'o))
oc.(synerr "argument ~a of ~s invalid; ~a expected"
n syntax [me.operand-name type]))
(when (and (member type '(d ds))
(or (zerop parg)))
oc.(synerr "argument ~a of ~s cannot be destination"
n syntax))
(when (and (member type '(rs ds))
(not (small-op-p parg)))
oc.(synerr "argument ~a of ~s isn't a small register"
n syntax))
(when (and (member type '(r rs d ds)) (< parg %lev-size%))
(set me.max-treg (max parg me.max-treg)))
parg))
pattern (rest syntax) (range 1)))
(defmeth assembler asm-one (me syntax)
(let ((oc (cond
((is-label syntax) [%oc-hash% 'label])
((consp syntax) [%oc-hash% (car syntax)]))))
(unless oc
(asm-error "invalid instruction ~s" syntax))
oc.(asm me syntax)))
(defmeth assembler asm (me insns)
(each ((i insns))
me.(asm-one i))
(unless (empty me.labref)
(asm-error "dangling label references"))
(whenlet ((n (cdr [find-max me.labdef : cdr])))
(unless (< -1 n (len me.buf))
(asm-error "labels outside of code"))))
(defmeth assembler dis-one (me)
(tree-bind (code extension operand) me.(get-insn)
(let ((oc [%oc-hash% code]))
oc.(dis me extension operand))))
(defmeth assembler dis (me)
me.(set-pos 0)
(build
(while (< me.(cur-pos) (len me.buf))
(add me.(dis-one)))))
(defmeth assembler dis-listing (me : (stream *stdout*))
(let ((p 0)
(c 0)
(l (len me.buf)))
me.(set-pos p)
(while (< p l)
(let* ((dis me.(dis-one))
(dis-txt (cat-str [mapcar tostringp dis] " "))
(q me.(cur-pos)))
(inc c)
me.(set-pos p)
(format stream "~,5d: ~,08X ~a\n" (trunc p 4) me.(get-word) dis-txt)
(while (< (inc p 4) q)
(format stream "~,5d: ~,08X\n" (trunc p 4) me.(get-word)))
me.(set-pos q)
(set p q)))
c))
(defvarl %oc-list-builder% (new list-builder))
(defvarl %oc-hash% (hash))
(defparml %oc-code% 0)
(defun asm-error (msg . args)
(error `~s: @msg` 'assembler . args))
(defun register-opcode (oc)
%oc-list-builder%.(add oc)
(set [%oc-hash% oc.symbol] oc)
(set [%oc-hash% oc.code] oc))
(defun is-label (obj)
(or (keywordp obj)
(and (symbolp obj)
(not (symbol-package obj)))))
(defun parse-compound-operand (cons)
(tree-case cons
((sym arg)
(when (< -1 arg %lev-size%)
(caseq sym
((t) arg)
(d (+ arg %lev-size%)))))
((sym arg1 arg2)
(when (and (<= 0 arg1 %max-v-lev%)
(<= 0 arg2 %max-lev-idx%))
(caseq sym
(v (+ (* (ssucc arg1) %lev-size%) arg2)))))))
(defun parse-operand (str)
(cond
((r^$ #/t[0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?/ str)
(int-str [str 1..:] 16))
((r^$ #/d[0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?/ str)
(+ %lev-size% (int-str [str 1..:] 16)))
((r^$ #/v[0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f]/ str)
(let ((lv (int-str [`0@{str[1..:]}` -5..-3] 16))
(ix (int-str [str -3..:] 16)))
(+ (* %lev-size% (ssucc lv)) ix)))))
(eval-only
(defmacro with-lev-idx ((lev-var idx-var) val-expr . body)
(with-gensyms (val-var)
^(let* ((,val-var ,val-expr)
(,lev-var (ash ,val-var (- %lev-bits%)))
(,idx-var (logtrunc ,val-var %lev-bits%)))
,*body))))
(defun operand-to-sym (val)
(with-lev-idx (lv ix) val
(caseql lv
(0 (if (zerop ix)
nil
(intern (fmt "t~s" ix))))
(1 (intern (fmt "d~s" ix)))
(t (intern (fmt "v~,02X~,03X" (ppred lv) ix))))))
(defun operand-to-exp (val)
(with-lev-idx (lv ix) val
(caseql lv
(0 (if (zerop ix)
nil
^(t ,ix)))
(1 ^(d ,ix))
(t ^(v ,(ppred lv) ,ix)))))
(defun bits-to-obj (bits width)
(let ((tag (logtrunc bits 2))
(val (ash bits -2)))
(caseq tag
(1 (sign-extend val (- width 2)))
(2 (chr-int val))
(t (error "~s: bad immediate operand: ~x" 'assembler bits)))))
(defun small-op-p (val)
(with-lev-idx (lv ix) val
(and (<= 0 ix %max-sm-lev-idx%)
(<= 0 lv %max-sm-lev%))))
(defun enc-small-op (val)
(with-lev-idx (lv ix) val
(logior (ash lv %sm-lev-bits%) ix)))
(defun small-op-to-sym (sval)
(let ((lv (ash sval (- %sm-lev-bits%)))
(ix (logtrunc sval %sm-lev-bits%)))
(operand-to-sym (+ (* lv %lev-size%) ix))))
(defstruct backpatch-low16 nil
(:method backpatch (me asm at offs)
(ignore me)
(tree-bind (hi t) asm.(get-pair)
asm.(set-pos at)
asm.(put-pair hi offs))))
(defstruct backpatch-high16 nil
(:method backpatch (me asm at offs)
(ignore me)
(tree-bind (t lo) asm.(get-pair)
asm.(set-pos at)
asm.(put-pair offs lo))))
(defvarl %backpatch-low16% (new backpatch-low16))
(defvarl %backpatch-high16% (new backpatch-high16))
(eval-only
(defmacro defopcode (class symbol code . slot-defs)
^(symacrolet ((auto (pinc %oc-code%)))
(defstruct ,class oc-base
(:static symbol ',symbol)
(:static code ,code)
,*slot-defs)
(register-opcode (new ,class))))
(defmacro defopcode-derived (class symbol code orig-class)
^(symacrolet ((auto (pinc %oc-code%)))
(defstruct ,class ,orig-class
(:static symbol ',symbol)
(:static code ,code))
(register-opcode (new ,class))))
(defmacro defopcode-alias (alias-symbol orig-symbol)
^(let ((oc [%oc-hash% ',orig-symbol]))
(set [%oc-hash% ',alias-symbol] oc))))
(defopcode op-label label nil
(:method asm (me asm syntax)
(ignore me)
(unless (is-label syntax)
asm.(synerr "label must be keyword or gensym"))
asm.(define-label syntax))
(:method dis (me asm extension operand)
(ignore me asm extension operand)))
(defopcode op-noop noop auto
(:method asm (me asm syntax)
me.(chk-arg-count 0 syntax)
asm.(put-insn me.code 0 0))
(:method dis (me asm extension operand)
(ignore asm extension operand)
^(,me.symbol)))
(defopcode op-frame frame auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (lev size) asm.(parse-args me syntax '(n n))
(unless (<= 2 lev %max-v-lev%)
me.(synerr "level must range from 2 to ~a"
%max-v-lev%))
(unless (<= 0 size %lev-size%)
me.(synerr "size must range from 0 to ~a"
%lev-size%))
asm.(put-insn me.code lev size)))
(:method dis (me asm lev size)
(ignore asm)
^(,me.symbol ,lev ,size)))
(defopcode-derived op-sframe sframe auto op-frame)
(defopcode-derived op-dframe dframe auto op-frame)
(defopcode op-end end auto
(:method asm (me asm syntax)
me.(chk-arg-count 1 syntax)
(let ((res (car asm.(parse-args me syntax '(r)))))
asm.(put-insn me.code 0 res)))
(:method dis (me asm extension res)
(ignore asm extension)
^(,me.symbol ,(operand-to-sym res))))
(defopcode-alias jend end)
(defopcode-alias xend end)
(defopcode-derived op-prof prof auto op-end)
(defopcode op-call call auto
(:method asm (me asm syntax)
me.(chk-arg-count-min 2 syntax)
(let* ((nargs (pred (len syntax)))
(syn-pat (repeat '(r) (succ nargs)))
(funargs (ppred nargs))
(args asm.(parse-args me syntax syn-pat)))
asm.(put-insn me.code funargs (pop args))
(while args
(let ((x (pop args))
(y (or (pop args) 0)))
asm.(put-pair y x)))))
(:method dis (me asm funargs arg0)
(build
(add me.symbol)
(add (operand-to-sym arg0))
(inc funargs 1)
(while (> funargs 0)
(dec funargs 2)
(tree-bind (y x) asm.(get-pair)
(add (operand-to-sym x))
(unless (minusp funargs)
(add (operand-to-sym y))))))))
(defopcode-derived op-apply apply auto op-call)
(defopcode op-gcall gcall auto
(:method asm (me asm syntax)
me.(chk-arg-count-min 2 syntax)
(let* ((nargs (pred (len syntax)))
(syn-pat (list* 'r 'n (repeat '(r) (sssucc nargs))))
(funargs (ppred nargs))
(args asm.(parse-args me syntax syn-pat)))
asm.(put-insn me.code funargs (pop args))
(while args
(let ((x (pop args))
(y (or (pop args) 0)))
asm.(put-pair y x)))))
(:method dis (me asm funargs arg0)
(let ((first t))
(build
(add me.symbol)
(add (operand-to-sym arg0))
(inc funargs 1)
(while (> funargs 0)
(dec funargs 2)
(tree-bind (y x) asm.(get-pair)
(add (if (zap first) x (operand-to-sym x)))
(unless (minusp funargs)
(add (operand-to-sym y)))))))))
(defopcode-derived op-gapply gapply auto op-gcall)
(defopcode op-movrs movrs auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (dst src) asm.(parse-args me syntax '(d rs))
asm.(put-insn me.code (enc-small-op src) dst)))
(:method dis (me asm src dst)
(ignore asm)
^(,me.symbol ,(operand-to-sym dst) ,(small-op-to-sym src))))
(defopcode op-movsr movsr auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (dst src) asm.(parse-args me syntax '(ds r))
asm.(put-insn me.code (enc-small-op dst) src)))
(:method dis (me asm dst src)
(ignore asm)
^(,me.symbol ,(small-op-to-sym dst) ,(operand-to-sym src))))
(defopcode op-movrr movrr auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (dst src) asm.(parse-args me syntax '(d r))
asm.(put-insn me.code 0 dst)
asm.(put-pair 0 src)))
(:method dis (me asm extension dst)
(ignore asm extension)
(let ((src (cadr asm.(get-pair))))
^(,me.symbol ,(operand-to-sym dst) ,(operand-to-sym src)))))
(defopcode op-mov-pseudo mov nil
(:method asm (me asm syntax)
(tree-bind (dst src) asm.(parse-args me syntax '(d r))
(let ((real [%oc-hash% (cond
((small-op-p dst) 'movsr)
((small-op-p src) 'movrs)
(t 'movrr))]))
real.(asm asm syntax)))))
(defopcode op-jmp jmp auto
(:method asm (me asm syntax)
me.(chk-arg-count 1 syntax)
(let ((dst (car asm.(parse-args me syntax '(l)))))
asm.(put-insn me.code (ash dst -16) (logtrunc dst 16))))
(:method backpatch (me asm at dst)
(ignore at)
asm.(put-insn me.code (ash dst -16) (logtrunc dst 16)))
(:method dis (me asm high16 low16)
(ignore asm)
^(,me.symbol ,(logior (ash high16 16) low16))))
(defopcode op-if if auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (reg dst) asm.(parse-args me syntax '(r l))
asm.(put-insn me.code (ash dst -16) (logtrunc dst 16))
asm.(put-pair 0 reg)))
(:method backpatch (me asm at dst)
(ignore at)
asm.(put-insn me.code (ash dst -16) (logtrunc dst 16)))
(:method dis (me asm high16 low16)
(ignore asm)
(let ((dst (logior (ash high16 16) low16))
(reg (cadr asm.(get-pair))))
^(,me.symbol ,(operand-to-sym reg) ,dst))))
(defopcode op-ifq ifq auto
(:method asm (me asm syntax)
me.(chk-arg-count 3 syntax)
(tree-bind (lreg rreg dst) asm.(parse-args me syntax '(r r l))
asm.(put-insn me.code (ash dst -16) (logtrunc dst 16))
asm.(put-pair lreg rreg)))
(:method backpatch (me asm at dst)
(ignore at)
asm.(put-insn me.code (ash dst -16) (logtrunc dst 16)))
(:method dis (me asm high16 low16)
(let ((dst (logior (ash high16 16) low16)))
(tree-bind (lreg rreg) asm.(get-pair)
^(,me.symbol ,(operand-to-sym lreg) ,(operand-to-sym rreg) ,dst)))))
(defopcode-derived op-ifql ifql auto op-ifq)
(defopcode op-swtch swtch auto
(:method asm (me asm syntax)
me.(chk-arg-count-min 1 syntax)
(let* ((args asm.(parse-args me syntax '(r)))
(lbls (cddr syntax))
(tblsz (len lbls)))
asm.(put-insn me.code tblsz (car args))
(while lbls
(let ((x asm.(lookup-label (pop lbls) %backpatch-low16%))
(y (if lbls
asm.(lookup-label (pop lbls) %backpatch-high16%)
0)))
asm.(put-pair y x)))))
(:method dis (me asm tblsz switch-val)
(build
(add me.symbol)
(add (operand-to-sym switch-val))
(while (> tblsz 0)
(dec tblsz 2)
(tree-bind (y x) asm.(get-pair)
(add x)
(unless (minusp tblsz)
(add y)))))))
(defopcode-derived op-uwprot uwprot auto op-jmp)
(defopcode op-block block auto
(:method asm (me asm syntax)
me.(chk-arg-count 3 syntax)
(tree-bind (outreg blname exitpt) asm.(parse-args me syntax '(d r l))
asm.(put-insn me.code (ash exitpt -16) (logtrunc exitpt 16))
asm.(put-pair outreg blname)))
(:method backpatch (me asm at exitpt)
(ignore at)
asm.(put-insn me.code (ash exitpt -16) (logtrunc exitpt 16)))
(:method dis (me asm high16 low16)
(let ((exitpt (logior (ash high16 16) low16)))
(tree-bind (outreg blname) asm.(get-pair)
^(,me.symbol ,(operand-to-sym outreg) ,(operand-to-sym blname)
,exitpt)))))
(defopcode op-retsr retsr auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (name reg) asm.(parse-args me syntax '(rs r))
asm.(put-insn me.code (enc-small-op name) reg)))
(:method dis (me asm name reg)
(ignore asm)
^(,me.symbol ,(small-op-to-sym name) ,(operand-to-sym reg))))
(defopcode op-retrs retrs auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (name reg) asm.(parse-args me syntax '(r rs))
asm.(put-insn me.code (enc-small-op reg) name)))
(:method dis (me asm reg name)
(ignore asm)
^(,me.symbol ,(operand-to-sym name) ,(small-op-to-sym reg))))
(defopcode op-retrr retrr auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (name reg) asm.(parse-args me syntax '(r r))
asm.(put-insn me.code 0 reg)
asm.(put-pair 0 name)))
(:method dis (me asm extension reg)
(ignore asm extension)
(let ((name (cadr asm.(get-pair))))
^(,me.symbol ,(operand-to-sym name) ,(operand-to-sym reg)))))
(defopcode op-ret-pseudo ret nil
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (name reg) asm.(parse-args me syntax '(r r))
(let ((real [%oc-hash% (cond
((small-op-p name) 'retsr)
((small-op-p reg) 'retrs)
(t 'retrr))]))
real.(asm asm syntax)))))
(defopcode-derived op-abscsr abscsr auto op-retsr)
(defopcode op-catch catch auto
(:method asm (me asm syntax)
me.(chk-arg-count 5 syntax)
(tree-bind (sym args catch-syms desc dst)
asm.(parse-args me syntax '(d d r r l))
asm.(put-insn me.code (ash dst -16) (logtrunc dst 16))
asm.(put-pair sym args)
asm.(put-pair desc catch-syms)))
(:method backpatch (me asm at dst)
(ignore at)
asm.(put-insn me.code (ash dst -16) (logtrunc dst 16)))
(:method dis (me asm high16 low16)
(ignore asm)
(let ((dst (logior (ash high16 16) low16)))
(tree-bind (sym args) asm.(get-pair)
(tree-bind (desc catch-syms) asm.(get-pair)
^(,me.symbol ,(operand-to-sym sym) ,(operand-to-sym args)
,(operand-to-sym catch-syms)
,(operand-to-sym desc) ,dst))))))
(defopcode op-handle handle auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (fun handle-syms) asm.(parse-args me syntax '(r r))
asm.(put-insn me.code 0 fun)
asm.(put-pair fun handle-syms)))
(:method dis (me asm extension fun)
(ignore asm extension)
(let ((handle-syms (cadr asm.(get-pair))))
^(,me.symbol ,(operand-to-sym fun) ,(operand-to-sym handle-syms)))))
(defopcode op-getv getv auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (reg name) asm.(parse-args me syntax '(d r))
(unless (small-op-p name)
asm.(asm-one ^(mov (t 1) ,(operand-to-exp name)))
(set name 1))
asm.(put-insn me.code (enc-small-op name) reg)))
(:method dis (me asm name reg)
(ignore asm)
^(,me.symbol ,(operand-to-sym reg) ,(small-op-to-sym name))))
(defopcode-derived op-oldgetf oldgetf auto op-getv)
(defopcode-derived op-getl1 getl1 auto op-getv)
(defopcode-derived op-getvb getvb auto op-getv)
(defopcode-derived op-getfb getfb auto op-getv)
(defopcode-derived op-getl1b getl1b auto op-getv)
(defopcode op-setv setv auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (reg name) asm.(parse-args me syntax '(r r))
(unless (small-op-p name)
asm.(asm-one ^(mov (t 1) ,(operand-to-exp name)))
(set name 1))
asm.(put-insn me.code (enc-small-op name) reg)))
(:method dis (me asm name reg)
(ignore asm)
^(,me.symbol ,(operand-to-sym reg) ,(small-op-to-sym name))))
(defopcode-derived op-setl1 setl1 auto op-setv)
(defopcode-derived op-bindv bindv auto op-setv)
(defopcode op-close close auto
(:method asm (me asm syntax)
me.(chk-arg-count-min 6 syntax)
(let* ((syn-pat (repeat '(d) (- (length syntax) 7))))
(tree-bind (reg frsize ntreg dst fix req vari . regs)
asm.(parse-args me syntax ^(d n n l n n o,*syn-pat))
(unless (<= 0 frsize %lev-size%)
me.(synerr "frame size must be 0 to ~a" %lev-size%))
asm.(put-insn me.code (ash dst -16) (logtrunc dst 16))
asm.(put-pair (logior (ash (if vari 1 0) %lev-bits%) frsize) reg)
asm.(put-pair req fix)
asm.(put-pair 0 ntreg)
(unless (eql fix (- (len regs) (if vari 1 0)))
me.(synerr "wrong number of registers"))
(while regs
(let ((x (pop regs))
(y (or (pop regs) 0)))
asm.(put-pair y x))))))
(:method backpatch (me asm at dst)
(ignore at)
asm.(put-insn me.code (ash dst -16) (logtrunc dst 16)))
(:method dis (me asm high16 low16)
(ignore asm)
(let ((dst (logior (ash high16 16) low16)))
(tree-bind (vari-frsize reg) asm.(get-pair)
(let ((vari (bit vari-frsize %lev-bits%)))
(tree-bind (req fix) asm.(get-pair)
(tree-bind (t ntreg) asm.(get-pair)
(build
(add me.symbol (operand-to-sym reg)
(logtrunc vari-frsize %lev-bits%)
ntreg dst fix req vari)
(when vari
(inc fix))
(while (> fix 0)
(dec fix 2)
(tree-bind (y x) asm.(get-pair)
(add (operand-to-sym x))
(unless (minusp fix)
(add (operand-to-sym y)))))))))))))
(defopcode op-getlx getlx auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (dst idx) asm.(parse-args me syntax '(d n))
(cond
((small-op-p dst)
asm.(put-insn me.code (enc-small-op dst) idx))
(t asm.(put-insn me.code (enc-small-op 1) idx)
asm.(asm-one ^(mov ,(operand-to-exp dst) t1))))))
(:method dis (me asm dst idx)
(ignore asm)
^(,me.symbol ,(small-op-to-sym dst) ,idx)))
(defopcode op-setlx setlx auto
(:method asm (me asm syntax)
me.(chk-arg-count 2 syntax)
(tree-bind (src idx) asm.(parse-args me syntax '(r n))
(cond
((small-op-p src)
asm.(put-insn me.code (enc-small-op src) idx))
(t asm.(asm-one ^(mov t1 ,(operand-to-exp src)))
asm.(put-insn me.code (enc-small-op 1) idx)))))
(:method dis (me asm src idx)
(ignore asm)
^(,me.symbol ,(small-op-to-sym src) ,idx)))
(defopcode-derived op-getf getf auto op-getlx)
(defun disassemble-cdf (code data funv *stdout*)
(let ((asm (new assembler buf code)))
(put-line "data:")
(mapdo (do format t "~5d: ~s\n" @1 @2) (range 0) data)
(put-line "syms:")
(mapdo (do format t "~5d: ~s\n" @1 @2) (range 0) funv)
(put-line "code:")
(let ((ninsn asm.(dis-listing)))
(put-line "instruction count:")
(format t "~5d\n" ninsn))))
(defun disassemble (obj : (stream *stdout*))
(symacrolet ((self 'vm-disassemble-obj))
(typecase obj
(vm-desc (disassemble-cdf (vm-desc-bytecode obj)
(vm-desc-datavec obj)
(vm-desc-symvec obj)
stream))
(fun (unless (vm-fun-p obj)
(error "~s: not a vm function: ~s" self obj))
(let* ((clo (func-get-env obj))
(desc (sys:vm-closure-desc clo))
(ip (sys:vm-closure-entry clo)))
(disassemble desc stream)
(put-line "entry point:")
(format stream "~5d\n" ip)))
(t (iflet ((fun (symbol-function obj)))
(disassemble fun stream)
(error "~s: not a compiled object: ~s" self obj))))
obj))
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