562 lines
20 KiB
Plaintext
562 lines
20 KiB
Plaintext
; things that a future assembler will need separate memory for:
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; code; types; args channel
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(= initialization-fns* (queue))
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(def reset ()
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(each f (as cons initialization-fns*)
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(f)))
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(mac on-init body
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`(enq (fn () ,@body)
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initialization-fns*))
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(= traces* (queue))
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(= trace-dir* ".traces/")
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(ensure-dir trace-dir*)
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(= curr-trace-file* nil)
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(on-init
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(awhen curr-trace-file*
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;? (prn "reset: " it)
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(tofile (+ trace-dir* it)
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(each (label trace) (as cons traces*)
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(pr label ": " trace))))
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(= curr-trace-file* nil)
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(= traces* (queue)))
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(def new-trace (filename)
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;? (prn "new-trace " filename)
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(= curr-trace-file* filename))
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(= dump-trace* nil)
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(def trace (label . args)
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;? (prn "trace: " dump-trace*)
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(if dump-trace* (apply prn label ": " args))
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(enq (list label (apply tostring:prn args))
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traces*))
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(def check-trace-contents (msg expected-contents)
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(unless (trace-contents-match expected-contents)
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(prn "F - " msg)
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(prn " trace contents")
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(print-trace-contents-mismatch expected-contents)))
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(def trace-contents-match (expected-contents)
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(each (label msg) (as cons traces*)
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(when (and expected-contents
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(is label expected-contents.0.0)
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(posmatch expected-contents.0.1 msg))
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(pop expected-contents)))
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(no expected-contents))
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(def print-trace-contents-mismatch (expected-contents)
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(each (label msg) (as cons traces*)
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(whenlet (expected-label expected-msg) expected-contents.0
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(if (and (is label expected-label)
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(posmatch expected-msg msg))
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(do (pr " * ")
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(pop expected-contents))
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(pr " "))
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(pr label ": " msg)))
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(prn " couldn't find")
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(each (expected-label expected-msg) expected-contents
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(prn " ! " expected-label ": " expected-msg)))
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(mac init-fn (name . body)
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`(enq (fn () (= (function* ',name) ',body))
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initialization-fns*))
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(def clear ()
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(= types* (obj
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; must be scalar or array, sum or product or primitive
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type (obj size 1)
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type-array (obj array t elem 'type)
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type-array-address (obj size 1 address t elem 'type-array)
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typeinfo (obj size 5 record t elems '(integer boolean boolean boolean type-array))
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typeinfo-address (obj size 1 address t elem 'typeinfo)
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typeinfo-address-array (obj array t elem 'typeinfo-address)
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location (obj size 1)
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integer (obj size 1)
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boolean (obj size 1)
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boolean-address (obj size 1 address t)
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byte (obj size 1)
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;? string (obj array t elem 'byte) ; inspired by Go
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character (obj size 1) ; int32 like a Go rune
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character-address (obj size 1 address t elem 'character)
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string (obj size 1) ; temporary hack
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; arrays consist of an integer length followed by the right number of elems
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integer-array (obj array t elem 'integer)
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integer-address (obj size 1 address t elem 'integer) ; pointer to int
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; records consist of a series of elems, corresponding to a list of types
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integer-boolean-pair (obj size 2 record t elems '(integer boolean))
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integer-boolean-pair-address (obj size 1 address t elem 'integer-boolean-pair)
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integer-boolean-pair-array (obj array t elem 'integer-boolean-pair)
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integer-integer-pair (obj size 2 record t elems '(integer integer))
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integer-point-pair (obj size 2 record t elems '(integer integer-integer-pair))
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custodian (obj size 1 record t elems '(integer))
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; editor
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line (obj array t elem 'character)
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line-address (obj size 1 address t elem 'line)
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line-address-address (obj size 1 address t elem 'line-address)
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screen (obj array t elem 'line-address)
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screen-address (obj size 1 address t elem 'screen)
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))
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(= memory* (table))
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(= function* (table)))
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(enq clear initialization-fns*)
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(def add-fns (fns)
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(each (name . body) fns
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(= function*.name (convert-braces body))))
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(def v (operand) ; for value
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operand.0)
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(def metadata (operand)
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cdr.operand)
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(def ty (operand)
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operand.1) ; assume type is always first bit of metadata, and it's always present
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(def typeinfo (operand)
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(types* ty.operand))
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(def sz (operand)
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;? (prn "sz " operand)
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(if typeinfo.operand!array
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array-len.operand
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typeinfo.operand!size))
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(defextend sz (typename) (isa typename 'sym)
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(or types*.typename!size
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(err "type @typename doesn't have a size: " (tostring:pr types*.typename))))
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(def addr (loc)
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(if (pos 'deref metadata.loc)
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(memory* v.loc)
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v.loc))
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(def addrs (n sz)
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(accum yield
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(repeat sz
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(yield n)
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(++ n))))
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(def m (loc) ; read memory, respecting metadata
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;? (prn "m " loc " " sz.loc)
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(if (is 'literal ty.loc)
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(v loc)
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(is 1 sz.loc)
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(memory* addr.loc)
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:else
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(annotate 'record
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(map memory* (addrs addr.loc sz.loc)))))
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(def setm (loc val) ; set memory, respecting metadata
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;? (prn "setm " loc " " val)
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(assert sz.loc)
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(if (is 1 sz.loc)
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(= (memory* addr.loc) val)
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(each (dest src) (zip (addrs addr.loc sz.loc)
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(rep val))
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(= (memory* dest) src))))
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(def array-len (operand)
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;? (prn operand)
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;? (prn (memory* 1000))
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(if typeinfo.operand!array
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(m `(,v.operand integer))
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(and typeinfo.operand!address (pos 'deref metadata.operand))
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(array-len (m operand) typeinfo.operand!elem)
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:else
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(err "can't take len of non-array @operand")))
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(def array-ref-addr (operand idx)
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;? (prn "aref addr: @operand @idx")
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(assert typeinfo.operand!array)
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(assert (< -1 idx (array-len operand)))
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(withs (elem typeinfo.operand!elem
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offset (+ 1 (* idx sz.elem)))
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(+ v.operand offset)))
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(def array-ref (operand idx)
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;? (prn "aref: @operand @idx")
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(assert typeinfo.operand!array)
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(assert (< -1 idx (array-len operand)))
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;? (prn "aref2: @operand @idx")
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(withs (elem typeinfo.operand!elem
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offset (+ 1 (* idx sz.elem)))
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;? (prn "aref3: @elem @v.operand @offset")
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(m `(,(+ v.operand offset) ,elem))))
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; context contains the call-stack of functions that haven't yet returned
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(def make-context (fn-name)
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(annotate 'context (obj call-stack (list
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(obj fn-name fn-name pc 0 caller-arg-idx 0)))))
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(defextend empty (x) (isa x 'context)
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(no rep.x!call-stack))
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(def stack (context)
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((rep context) 'call-stack))
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(mac push-stack (context op)
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`(push (obj fn-name ,op pc 0 caller-arg-idx 0)
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((rep ,context) 'call-stack)))
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(mac pop-stack (context)
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`(pop ((rep ,context) 'call-stack)))
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(def top (context)
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stack.context.0)
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(def body (context (o idx 0))
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(function* stack.context.idx!fn-name))
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(mac pc (context (o idx 0)) ; assignable
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`((((rep ,context) 'call-stack) ,idx) 'pc))
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(mac caller-arg-idx (context (o idx 0)) ; assignable
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`((((rep ,context) 'call-stack) ,idx) 'caller-arg-idx))
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(= scheduling-interval* 500)
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(def parse-instr (instr)
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(iflet delim (pos '<- instr)
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(list (cut instr 0 delim) ; oargs
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(instr (+ delim 1)) ; op
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(cut instr (+ delim 2))) ; args
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(list nil instr.0 cdr.instr)))
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(def caller-args (context) ; not assignable
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(let (_ _ args) (parse-instr ((body context 1) (pc context 1)))
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args))
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(def caller-oargs (context) ; not assignable
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(let (oargs _ _) (parse-instr ((body context 1) (pc context 1)))
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oargs))
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(= contexts* (queue))
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(def run fn-names
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(ret result 0
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(each it fn-names
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(enq make-context.it contexts*))
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; simple round-robin scheduler
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(while (~empty contexts*)
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(let context deq.contexts*
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(trace "schedule" top.context!fn-name)
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(let insts-run (run-for-time-slice context scheduling-interval*)
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(= result (+ result insts-run)))
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(if (~empty context)
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(enq context contexts*))))))
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($:require "charterm/main.rkt")
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(def run-for-time-slice (context time-slice)
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;? (prn "AAA")
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(point return
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;? (prn "BBB")
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(for ninstrs 0 (< ninstrs time-slice) (++ ninstrs)
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;? (prn "CCC " pc.context " " context " " (len body.context))
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(if (empty body.context) (err "@stack.context.0!fn-name not defined"))
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(while (>= pc.context (len body.context))
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(pop-stack context)
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(if empty.context (return ninstrs))
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(++ pc.context))
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;? (prn memory*)
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(trace "run" top.context!fn-name " " pc.context ": " (body.context pc.context))
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;? (prn "--- " top.context!fn-name " " pc.context ": " (body.context pc.context))
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(let (oarg op arg) (parse-instr (body.context pc.context))
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;? (prn op " " arg " -> " oarg)
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(let tmp
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(case op
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add
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(do (trace "add" (m arg.0) " " (m arg.1))
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(+ (m arg.0) (m arg.1))
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)
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sub
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(- (m arg.0) (m arg.1))
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mul
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(* (m arg.0) (m arg.1))
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div
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(/ (real (m arg.0)) (m arg.1))
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idiv
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(list (trunc:/ (m arg.0) (m arg.1))
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(mod (m arg.0) (m arg.1)))
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and
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(and (m arg.0) (m arg.1))
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or
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(or (m arg.0) (m arg.1))
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not
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(not (m arg.0))
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eq
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(is (m arg.0) (m arg.1))
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neq
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(do (trace "neq" (m arg.0) " " (m arg.1))
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(~is (m arg.0) (m arg.1))
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)
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lt
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(< (m arg.0) (m arg.1))
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gt
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(> (m arg.0) (m arg.1))
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le
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(<= (m arg.0) (m arg.1))
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ge
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(>= (m arg.0) (m arg.1))
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arg
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(let idx (if arg
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arg.0
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(do1 caller-arg-idx.context
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(++ caller-arg-idx.context)))
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;? (prn idx)
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;? (prn caller-args.context)
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(m caller-args.context.idx))
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type
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(ty (caller-args.context arg.0))
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otype
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(ty (caller-oargs.context arg.0))
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jmp
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(do (= pc.context (+ 1 pc.context (v arg.0)))
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;? (prn "jumping to " pc.context)
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(continue))
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jif
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(when (is t (m arg.0))
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(= pc.context (+ 1 pc.context (v arg.1)))
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;? (prn "jumping to " pc.context)
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(continue))
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copy
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(m arg.0)
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get
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(with (base arg.0 ; integer (non-symbol) memory location including metadata
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idx (v arg.1)) ; literal integer
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;? (prn base ": " (memory* v.base))
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(when typeinfo.base!address
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(assert (pos 'deref metadata.base))
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(= base (list (memory* v.base) typeinfo.base!elem)))
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;? (prn "after: " base)
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(if typeinfo.base!record
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(do (assert (< -1 idx (len typeinfo.base!elems)))
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(m `(,(+ v.base
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(apply + (map sz
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(firstn idx typeinfo.base!elems))))
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,typeinfo.base!elems.idx)))
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(assert nil "get on invalid type @base")))
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get-address
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(with (base arg.0
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idx (v arg.1))
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(when typeinfo.base!address
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(assert (pos 'deref metadata.base))
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(= base (list (memory* v.base) typeinfo.base!elem)))
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(if typeinfo.base!record
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(do (assert (< -1 idx (len typeinfo.base!elems)))
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(+ v.base
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(apply + (map sz
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(firstn idx typeinfo.base!elems)))))
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(assert nil "get-address on invalid type @base")))
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index
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(with (base arg.0 ; integer (non-symbol) memory location including metadata
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idx (m arg.1))
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;? (prn "processing index: @base @idx")
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(when typeinfo.base!address
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(assert (pos 'deref metadata.base))
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(= base (list (memory* v.base) typeinfo.base!elem)))
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;? (prn "after maybe deref: @base @idx")
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;? (prn Memory-in-use-until ": " memory*)
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(if typeinfo.base!array
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(array-ref base idx)
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(assert nil "get on invalid type @arg.0 => @base")))
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index-address
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(with (base arg.0
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idx (m arg.1))
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(when typeinfo.base!address
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(assert (pos 'deref metadata.base))
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(= base (list (memory* v.base) typeinfo.base!elem)))
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(if typeinfo.base!array
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(array-ref-addr base idx)
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(assert nil "get-address on invalid type @arg.0 => @base")))
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new
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(let type (v arg.0)
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(if types*.type!array
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(new-array type (m arg.1))
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(new-scalar type)))
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sizeof
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(sizeof (v arg.0))
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len
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(let base arg.0
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(if typeinfo.base!array
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array-len.base
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-1))
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; multiprocessing
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run
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(run (v arg.0))
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fork
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(enq (make-context (v arg.0)) contexts*)
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; text interaction
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cls
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(do1 nil ($.charterm-clear-screen))
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cll
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(do1 nil ($.charterm-clear-line))
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cursor
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(do1 nil ($.charterm-cursor (m arg.0) (m arg.1)))
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print
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(do1 nil ((if ($.current-charterm) $.charterm-display pr) (m arg.0)))
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getc
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($.charterm-read-key)
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bold-mode
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(do1 nil ($.charterm-bold))
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non-bold-mode
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(do1 nil ($.charterm-normal))
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console-on
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(do1 nil (if ($.current-charterm) ($.open-charterm)))
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console-off
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(do1 nil (if ($.current-charterm) ($.close-charterm)))
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reply
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(do (pop-stack context)
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(if empty.context (return ninstrs))
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(let (caller-oargs _ _) (parse-instr (body.context pc.context))
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(each (dest src) (zip caller-oargs arg)
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(setm dest (m src))))
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(++ pc.context)
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(while (>= pc.context (len body.context))
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(pop-stack context)
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(if empty.context (return ninstrs))
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(++ pc.context))
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(continue))
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; else user-defined function
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(do (if function*.op
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(push-stack context op)
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(err "no such op @op"))
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(continue))
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)
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; opcode generated some value, stored in 'tmp'
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;? (prn "store: " tmp " " oarg)
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(if (acons tmp)
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(for i 0 (< i (min len.tmp len.oarg)) ++.i
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(setm oarg.i tmp.i))
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(when oarg ; must be a list
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;? (prn oarg.0)
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(setm oarg.0 tmp)))
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)
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(++ pc.context)))
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(return time-slice)))
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(enq (fn () (= Memory-in-use-until 1000))
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initialization-fns*)
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(def new-scalar (type)
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(ret result Memory-in-use-until
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(++ Memory-in-use-until sizeof.type)))
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(def new-array (type size)
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;? (prn "new array: @type @size")
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(ret result Memory-in-use-until
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(++ Memory-in-use-until (+ 1 (* (sizeof types*.type!elem) size)))))
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(def sizeof (type)
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(if (~or types*.type!record types*.type!array)
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types*.type!size
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types*.type!record
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(sum idfn
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(accum yield
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(each elem types*.type!elems
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(yield sizeof.elem))))))
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(def convert-braces (instrs)
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(let locs () ; list of information on each brace: (open/close pc)
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(let pc 0
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(loop (instrs instrs)
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(each instr instrs
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(if (~is 'begin instr.0)
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(do
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(trace "cvt0" pc " " instr " -- " locs)
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(++ pc))
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; hack: racket replaces curlies with parens, so we need the
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; keyword begin to delimit blocks.
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; ultimately there'll be no nesting and curlies will just be in a
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; line by themselves.
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(do
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;? (prn `(open ,pc))
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(push `(open ,pc) locs)
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(recur cdr.instr)
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;? (prn `(close ,pc))
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(push `(close ,pc) locs))))))
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(zap rev locs)
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;? (prn locs)
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(with (pc 0
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stack ()) ; elems are pcs
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(accum yield
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(loop (instrs instrs)
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(each instr instrs
|
|
(point continue
|
|
(let delim (or (pos '<- instr) -1)
|
|
(with (oarg (if (>= delim 0)
|
|
(cut instr 0 delim))
|
|
op (instr (+ delim 1))
|
|
arg (cut instr (+ delim 2)))
|
|
(trace "cvt1" pc " " op " " oarg)
|
|
(case op
|
|
begin
|
|
(do
|
|
(push pc stack)
|
|
(assert:is oarg nil)
|
|
(recur arg)
|
|
(pop stack)
|
|
(continue))
|
|
break
|
|
(do
|
|
(assert:is oarg nil)
|
|
(assert:is arg nil)
|
|
(yield `(jmp (,(close-offset pc locs) offset))))
|
|
breakif
|
|
(do
|
|
;? (prn "breakif: " instr)
|
|
(assert:is oarg nil)
|
|
(yield `(jif ,arg.0 (,(close-offset pc locs) offset))))
|
|
continue
|
|
(do
|
|
(assert:is oarg nil)
|
|
(assert:is arg nil)
|
|
(yield `(jmp (,(- stack.0 pc) offset))))
|
|
continueif
|
|
(do
|
|
(trace "cvt0" "continueif: " instr " => " (- stack.0 1))
|
|
(assert:is oarg nil)
|
|
(yield `(jif ,arg.0 (,(- stack.0 1 pc) offset))))
|
|
;else
|
|
(yield instr))))
|
|
(++ pc))))))))
|
|
|
|
(def close-offset (pc locs)
|
|
(let close 0
|
|
(with (stacksize 0
|
|
done nil)
|
|
(each (state loc) locs
|
|
;? (prn " :" close " " state " - " loc)
|
|
(if (< loc pc)
|
|
nil ; do nothing
|
|
(no done)
|
|
(do
|
|
; first time
|
|
(when (and (is 0 stacksize) (~is loc pc))
|
|
(++ stacksize))
|
|
(if (is 'open state) (++ stacksize) (-- stacksize))
|
|
; last time
|
|
(when (is 0 stacksize)
|
|
(= close loc)
|
|
(set done))))))
|
|
(- close pc 1)))
|
|
|
|
(def prn2 (msg . args)
|
|
(pr msg)
|
|
(apply prn args))
|
|
|
|
(reset)
|
|
(awhen cdr.argv
|
|
(map add-fns:readfile it)
|
|
($.open-charterm)
|
|
(run 'main)
|
|
(if ($.current-charterm) ($.close-charterm))
|
|
(prn memory*))
|