#| -*-Scheme-*-
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/bobcat/lapgen.scm,v 1.181 1987/06/13 20:45:51 cph Exp $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/compiler/machines/bobcat/lapgen.scm,v 1.182 1987/06/13 20:56:33 cph Exp $
Copyright (c) 1987 Massachusetts Institute of Technology
(define popper:apply-closure '(@AO 6 #x0168))
(define popper:apply-stack '(@AO 6 #x01A8))
-(define popper:value '(@AO 6 #x01E8))
-\f
-;;;; Transfers to Registers
-
-;;; All assignments to pseudo registers are required to delete the
-;;; dead registers BEFORE performing the assignment. This is because
-;;; the register being assigned may be PSEUDO-REGISTER=? to one of the
-;;; dead registers, and thus would be flushed if the deletions
-;;; happened after the assignment.
-
-(define-rule statement
- (ASSIGN (REGISTER 12) (REGISTER 15))
- (enable-frame-pointer-offset! 0)
- '())
-
-(define-rule statement
- (ASSIGN (REGISTER 15) (OFFSET-ADDRESS (REGISTER 15) (? n)))
- (decrement-frame-pointer-offset! n (increment-anl 7 n)))
-
-(define-rule statement
- (ASSIGN (REGISTER (? target)) (OFFSET-ADDRESS (REGISTER 15) (? n)))
- (QUALIFIER (pseudo-register? target))
- `((LEA (@AO 7 ,(* 4 n)) ,(reference-assignment-alias! target 'ADDRESS))))
-
-(define-rule statement
- (ASSIGN (REGISTER 15) (REGISTER (? source)))
- (disable-frame-pointer-offset!
- `((MOVE L ,(coerce->any source) (A 7)))))
-
-(define-rule statement
- (ASSIGN (REGISTER (? target)) (CONSTANT (? source)))
- (QUALIFIER (pseudo-register? target))
- `(,(load-constant source (coerce->any target))))
-
-(define-rule statement
- (ASSIGN (REGISTER (? target)) (VARIABLE-CACHE (? name)))
- (QUALIFIER (pseudo-register? target))
- `((MOVE L
- (@PCR ,(free-reference-label name))
- ,(reference-assignment-alias! target 'DATA))))
-
-(define-rule statement
- (ASSIGN (REGISTER (? target)) (REGISTER (? source)))
- (QUALIFIER (pseudo-register? target))
- (move-to-alias-register! source 'DATA target)
- '())
-\f
-(define-rule statement
- (ASSIGN (REGISTER (? target)) (OBJECT->ADDRESS (REGISTER (? source))))
- (QUALIFIER (pseudo-register? target))
- (let ((target (move-to-alias-register! source 'DATA target)))
- `((AND L ,mask-reference ,target))))
-
-(define-rule statement
- (ASSIGN (REGISTER (? target)) (OBJECT->TYPE (REGISTER (? source))))
- (QUALIFIER (pseudo-register? target))
- (let ((target (move-to-alias-register! source 'DATA target)))
- `((RO L L (& 8) ,target))))
-
-(define-rule statement
- (ASSIGN (REGISTER (? target)) (OFFSET (REGISTER (? address)) (? offset)))
- (QUALIFIER (pseudo-register? target))
- (let ((source (indirect-reference! address offset)))
- (delete-dead-registers!)
- ;; The fact that the target register here is a data register is a
- ;; heuristic that works reasonably well since if the value is a
- ;; pointer, we will probably want to dereference it, which
- ;; requires that we first mask it.
- `((MOVE L ,source
- ,(register-reference (allocate-alias-register! target 'DATA))))))
-
-(define-rule statement
- (ASSIGN (REGISTER (? target)) (POST-INCREMENT (REGISTER 15) 1))
- (QUALIFIER (pseudo-register? target))
- (record-pop!)
- (delete-dead-registers!)
- `((MOVE L (@A+ 7)
- ,(register-reference (allocate-alias-register! target 'DATA)))))
-
-(define-rule statement
- (ASSIGN (REGISTER (? target))
- (CONS-POINTER (CONSTANT (? type)) (REGISTER (? datum))))
- (QUALIFIER (pseudo-register? target))
- (let ((target* (coerce->any target))
- (datum (coerce->any datum)))
- (delete-dead-registers!)
- (if (register-expression? target*)
- `((MOVE L ,datum ,reg:temp)
- (MOVE B (& ,type) ,reg:temp)
- (MOVE L ,reg:temp ,target*))
- `((MOVE L ,datum ,target*)
- (MOVE B (& ,type) ,target*)))))
-\f
-;;;; Transfers to Memory
-
-(define-rule statement
- (ASSIGN (OFFSET (REGISTER (? a)) (? n))
- (CONSTANT (? object)))
- `(,(load-constant object (indirect-reference! a n))))
-
-(define-rule statement
- (ASSIGN (OFFSET (REGISTER (? a)) (? n))
- (REGISTER (? r)))
- `((MOVE L ,(coerce->any r) ,(indirect-reference! a n))))
-
-(define-rule statement
- (ASSIGN (OFFSET (REGISTER (? a)) (? n))
- (POST-INCREMENT (REGISTER 15) 1))
- (record-pop!)
- `((MOVE L (@A+ 7) ,(indirect-reference! a n))))
-
-(define-rule statement
- (ASSIGN (OFFSET (REGISTER (? a)) (? n))
- (CONS-POINTER (CONSTANT (? type)) (REGISTER (? r))))
- (let ((target (indirect-reference! a n)))
- `((MOVE L ,(coerce->any r) ,target)
- (MOVE B (& ,type) ,target))))
-
-(define-rule statement
- (ASSIGN (OFFSET (REGISTER (? a0)) (? n0))
- (OFFSET (REGISTER (? a1)) (? n1)))
- (let ((source (indirect-reference! a1 n1)))
- `((MOVE L ,source ,(indirect-reference! a0 n0)))))
-\f
-;;;; Consing
-
-(define-rule statement
- (ASSIGN (POST-INCREMENT (REGISTER 13) 1) (CONSTANT (? object)))
- `(,(load-constant object '(@A+ 5))))
-
-(define-rule statement
- (ASSIGN (POST-INCREMENT (REGISTER 13) 1) (UNASSIGNED))
- `(,(load-non-pointer type-code:unassigned 0 '(@A+ 5))))
-
-(define-rule statement
- (ASSIGN (POST-INCREMENT (REGISTER 13) 1) (REGISTER (? r)))
- `((MOVE L ,(coerce->any r) (@A+ 5))))
-
-(define-rule statement
- (ASSIGN (POST-INCREMENT (REGISTER 13) 1) (OFFSET (REGISTER (? r)) (? n)))
- `((MOVE L ,(indirect-reference! r n) (@A+ 5))))
-
-(define-rule statement
- (ASSIGN (POST-INCREMENT (REGISTER 13) 1) (ENTRY:PROCEDURE (? label)))
- (let ((temporary
- (register-reference (allocate-temporary-register! 'ADDRESS))))
- `((LEA (@PCR ,(procedure-external-label (label->procedure label)))
- ,temporary)
- (MOVE L ,temporary (@A+ 5))
- (MOVE B (& ,type-code:return-address) (@AO 5 -4)))))
-\f
-;;;; Pushes
-
-(define-rule statement
- (ASSIGN (PRE-INCREMENT (REGISTER 15) -1) (CONSTANT (? object)))
- (record-push!
- `(,(load-constant object '(@-A 7)))))
-
-(define-rule statement
- (ASSIGN (PRE-INCREMENT (REGISTER 15) -1) (UNASSIGNED))
- (record-push!
- `(,(load-non-pointer type-code:unassigned 0 '(@-A 7)))))
-
-(define-rule statement
- (ASSIGN (PRE-INCREMENT (REGISTER 15) -1) (REGISTER (? r)))
- (record-push!
- (if (= r regnum:frame-pointer)
- `((PEA ,(offset-reference regnum:stack-pointer (frame-pointer-offset)))
- (MOVE B (& ,type-code:stack-environment) (@A 7)))
- `((MOVE L ,(coerce->any r) (@-A 7))))))
-
-(define-rule statement
- (ASSIGN (PRE-INCREMENT (REGISTER 15) -1)
- (CONS-POINTER (CONSTANT (? type)) (REGISTER (? r))))
- (record-push!
- `((MOVE L ,(coerce->any r) (@-A 7))
- (MOVE B (& ,type) (@A 7)))))
-
-(define-rule statement
- (ASSIGN (PRE-INCREMENT (REGISTER 15) -1) (OFFSET (REGISTER (? r)) (? n)))
- (record-push!
- `((MOVE L ,(indirect-reference! r n) (@-A 7)))))
-
-(define-rule statement
- (ASSIGN (PRE-INCREMENT (REGISTER 15) -1)
- (OFFSET-ADDRESS (REGISTER 12) (? n)))
- (record-push!
- `((PEA ,(offset-reference regnum:stack-pointer
- (+ n (frame-pointer-offset))))
- (MOVE B (& ,type-code:stack-environment) (@A 7)))))
-
-(define-rule statement
- (ASSIGN (PRE-INCREMENT (REGISTER 15) -1) (ENTRY:CONTINUATION (? label)))
- (record-continuation-frame-pointer-offset! label)
- (record-push!
- `((PEA (@PCR ,label))
- (MOVE B (& ,type-code:return-address) (@A 7)))))
-\f
-;;;; Predicates
-
-(define-rule predicate
- (TRUE-TEST (REGISTER (? register)))
- (set-standard-branches! 'NE)
- `(,(test-non-pointer (ucode-type false) 0 (coerce->any register))))
-
-(define-rule predicate
- (TRUE-TEST (OFFSET (REGISTER (? register)) (? offset)))
- (set-standard-branches! 'NE)
- `(,(test-non-pointer (ucode-type false) 0
- (indirect-reference! register offset))))
-
-(define-rule predicate
- (TYPE-TEST (REGISTER (? register)) (? type))
- (QUALIFIER (pseudo-register? register))
- (set-standard-branches! 'EQ)
- `(,(test-byte type
- (register-reference (load-alias-register! register 'DATA)))))
-
-(define-rule predicate
- (TYPE-TEST (OBJECT->TYPE (REGISTER (? register))) (? type))
- (QUALIFIER (pseudo-register? register))
- (set-standard-branches! 'EQ)
- (let ((reference (move-to-temporary-register! register 'DATA)))
- `((RO L L (& 8) ,reference)
- ,(test-byte type reference))))
-
-(define-rule predicate
- (UNASSIGNED-TEST (REGISTER (? register)))
- (set-standard-branches! 'EQ)
- `(,(test-non-pointer (ucode-type unassigned) 0 (coerce->any register))))
-
-(define-rule predicate
- (UNASSIGNED-TEST (OFFSET (REGISTER (? register)) (? offset)))
- (set-standard-branches! 'EQ)
- `(,(test-non-pointer (ucode-type unassigned) 0
- (indirect-reference! register offset))))
-\f
-(define (eq-test/constant*register constant register)
- (set-standard-branches! 'EQ)
- (if (non-pointer-object? constant)
- `(,(test-non-pointer (primitive-type constant)
- (primitive-datum constant)
- (coerce->any register)))
- `((CMP L
- (@PCR ,(constant->label constant))
- ,(coerce->machine-register register)))))
-
-(define (eq-test/constant*memory constant memory-reference)
- (set-standard-branches! 'EQ)
- (if (non-pointer-object? constant)
- `(,(test-non-pointer (primitive-type constant)
- (primitive-datum constant)
- memory-reference))
- (let ((temp (reference-temporary-register! false)))
- `((MOVE L ,memory-reference ,temp)
- (CMP L (@PCR ,(constant->label constant)) ,temp)))))
-
-(define (eq-test/register*register register-1 register-2)
- (set-standard-branches! 'EQ)
- (let ((finish
- (lambda (register-1 register-2)
- `((CMP L
- ,(coerce->any register-2)
- ,(coerce->machine-register register-1))))))
- (if (or (and (not (register-has-alias? register-1 'DATA))
- (register-has-alias? register-2 'DATA))
- (and (not (register-has-alias? register-1 'ADDRESS))
- (register-has-alias? register-2 'ADDRESS)))
- (finish register-2 register-1)
- (finish register-1 register-2))))
-
-(define (eq-test/register*memory register memory-reference)
- (set-standard-branches! 'EQ)
- `((CMP L ,memory-reference ,(coerce->machine-register register))))
-
-(define (eq-test/memory*memory register-1 offset-1 register-2 offset-2)
- (set-standard-branches! 'EQ)
- (let ((temp (reference-temporary-register! false)))
- (let ((finish
- (lambda (register-1 offset-1 register-2 offset-2)
- `((MOVE L ,(indirect-reference! register-1 offset-1) ,temp)
- (CMP L ,(indirect-reference! register-2 offset-2) ,temp)))))
- (if (or (and (not (register-has-alias? register-1 'ADDRESS))
- (register-has-alias? register-2 'ADDRESS))
- (and (not (register-has-alias? register-1 'DATA))
- (register-has-alias? register-2 'DATA)))
- (finish register-2 offset-2 register-1 offset-1)
- (finish register-1 offset-1 register-2 offset-2)))))
-\f
-(define-rule predicate
- (EQ-TEST (REGISTER (? register)) (CONSTANT (? constant)))
- (eq-test/constant*register constant register))
-
-(define-rule predicate
- (EQ-TEST (CONSTANT (? constant)) (REGISTER (? register)))
- (eq-test/constant*register constant register))
-
-(define-rule predicate
- (EQ-TEST (OFFSET (REGISTER (? register)) (? offset)) (CONSTANT (? constant)))
- (eq-test/constant*memory constant (indirect-reference! register offset)))
-
-(define-rule predicate
- (EQ-TEST (CONSTANT (? constant)) (OFFSET (REGISTER (? register)) (? offset)))
- (eq-test/constant*memory constant (indirect-reference! register offset)))
-
-(define-rule predicate
- (EQ-TEST (CONSTANT (? constant)) (POST-INCREMENT (REGISTER 15) 1))
- (eq-test/constant*memory constant '(@A+ 7)))
-
-(define-rule predicate
- (EQ-TEST (POST-INCREMENT (REGISTER 15) 1) (CONSTANT (? constant)))
- (eq-test/constant*memory constant '(@A+ 7)))
-
-(define-rule predicate
- (EQ-TEST (REGISTER (? register-1)) (REGISTER (? register-2)))
- (eq-test/register*register register-1 register-2))
-
-(define-rule predicate
- (EQ-TEST (OFFSET (REGISTER (? register-1)) (? offset-1))
- (REGISTER (? register-2)))
- (eq-test/register*memory register-2
- (indirect-reference! register-1 offset-1)))
-
-(define-rule predicate
- (EQ-TEST (REGISTER (? register-1))
- (OFFSET (REGISTER (? register-2)) (? offset-2)))
- (eq-test/register*memory register-1
- (indirect-reference! register-2 offset-2)))
-
-(define-rule predicate
- (EQ-TEST (POST-INCREMENT (REGISTER 15) 1) (REGISTER (? register)))
- (record-pop!)
- (eq-test/register*memory register '(@A+ 7)))
-
-(define-rule predicate
- (EQ-TEST (REGISTER (? register)) (POST-INCREMENT (REGISTER 15) 1))
- (record-pop!)
- (eq-test/register*memory register '(@A+ 7)))
-
-(define-rule predicate
- (EQ-TEST (OFFSET (REGISTER (? register-1)) (? offset-1))
- (OFFSET (REGISTER (? register-2)) (? offset-2)))
- (eq-test/memory*memory register-1 offset-1 register-2 offset-2))
-\f
-;;;; Invocations
-
-(define-rule statement
- (INVOCATION:APPLY (? number-pushed) (? prefix) (? continuation))
- (disable-frame-pointer-offset!
- `(,@(generate-invocation-prefix prefix '())
- ,(load-dnw number-pushed 0)
- (JMP ,entry:compiler-apply))))
-
-(define-rule statement
- (INVOCATION:JUMP (? n)
- (APPLY-CLOSURE (? frame-size) (? receiver-offset))
- (? continuation) (? label))
- (disable-frame-pointer-offset!
- `(,@(clear-map!)
- ,@(apply-closure-sequence frame-size receiver-offset label))))
-
-(define-rule statement
- (INVOCATION:JUMP (? n)
- (APPLY-STACK (? frame-size) (? receiver-offset)
- (? n-levels))
- (? continuation) (? label))
- (disable-frame-pointer-offset!
- `(,@(clear-map!)
- ,@(apply-stack-sequence frame-size receiver-offset n-levels label))))
-
-(define-rule statement
- (INVOCATION:JUMP (? number-pushed) (? prefix) (? continuation) (? label))
- (QUALIFIER (not (memq (car prefix) '(APPLY-CLOSURE APPLY-STACK))))
- (disable-frame-pointer-offset!
- `(,@(generate-invocation-prefix prefix '())
- (BRA L (@PCR ,label)))))
-
-(define-rule statement
- (INVOCATION:LEXPR (? number-pushed) (? prefix) (? continuation)
- (? label))
- (disable-frame-pointer-offset!
- `(,@(generate-invocation-prefix prefix '())
- ,(load-dnw number-pushed 0)
- (BRA L (@PCR ,label)))))
-\f
-(define-rule statement
- (INVOCATION:CACHE-REFERENCE (? frame-size) (? prefix) (? continuation)
- (? extension))
- (disable-frame-pointer-offset!
- (let ((set-extension (expression->machine-register! extension a3)))
- (delete-dead-registers!)
- `(,@set-extension
- ,@(generate-invocation-prefix prefix (list a3))
- ,(load-dnw frame-size 0)
- (LEA (@PCR ,*block-start-label*) (A 1))
- (JMP ,entry:compiler-cache-reference-apply)))))
-
-(define-rule statement
- (INVOCATION:LOOKUP (? frame-size) (? prefix) (? continuation)
- (? environment) (? name))
- (disable-frame-pointer-offset!
- (let ((set-environment (expression->machine-register! environment d4)))
- (delete-dead-registers!)
- `(,@set-environment
- ,@(generate-invocation-prefix prefix (list d4))
- ,(load-constant name '(D 5))
- ,(load-dnw frame-size 0)
- (JMP ,entry:compiler-lookup-apply)))))
-
-(define-rule statement
- (INVOCATION:PRIMITIVE (? number-pushed) (? prefix) (? continuation)
- (? primitive))
- (disable-frame-pointer-offset!
- `(,@(generate-invocation-prefix prefix '())
- ,@(if (eq? primitive compiled-error-procedure)
- `(,(load-dnw (1+ number-pushed) 0)
- (JMP ,entry:compiler-error))
- `(,(load-dnw (primitive-datum primitive) 6)
- (JMP ,entry:compiler-primitive-apply))))))
-
-(define-rule statement
- (RETURN)
- (disable-frame-pointer-offset!
- `(,@(clear-map!)
- (CLR B (@A 7))
- (RTS))))
-\f
-(define (generate-invocation-prefix prefix needed-registers)
- (let ((clear-map (clear-map!)))
- (need-registers! needed-registers)
- `(,@clear-map
- ,@(case (car prefix)
- ((NULL) '())
- ((MOVE-FRAME-UP)
- (apply generate-invocation-prefix:move-frame-up (cdr prefix)))
- ((APPLY-CLOSURE)
- (apply generate-invocation-prefix:apply-closure (cdr prefix)))
- ((APPLY-STACK)
- (apply generate-invocation-prefix:apply-stack (cdr prefix)))
- (else
- (error "bad prefix type" prefix))))))
-
-(define (generate-invocation-prefix:move-frame-up frame-size how-far)
- (cond ((zero? how-far) '())
- ((zero? frame-size)
- (increment-anl 7 how-far))
- ((= frame-size 1)
- `((MOVE L (@A+ 7) ,(offset-reference a7 (-1+ how-far)))
- ,@(increment-anl 7 (-1+ how-far))))
- ((= frame-size 2)
- (if (= how-far 1)
- `((MOVE L (@AO 7 4) (@AO 7 8))
- (MOVE L (@A+ 7) (@A 7)))
- (let ((i `(MOVE L (@A+ 7) ,(offset-reference a7 (-1+ how-far)))))
- `(,i ,i ,@(increment-anl 7 (- how-far 2))))))
- (else
- (let ((temp-0 (allocate-temporary-register! 'ADDRESS))
- (temp-1 (allocate-temporary-register! 'ADDRESS)))
- `((LEA ,(offset-reference a7 frame-size)
- ,(register-reference temp-0))
- (LEA ,(offset-reference a7 (+ frame-size how-far))
- ,(register-reference temp-1))
- ,@(generate-n-times frame-size 5
- `(MOVE L
- (@-A ,(- temp-0 8))
- (@-A ,(- temp-1 8)))
- (lambda (generator)
- (generator (allocate-temporary-register! 'DATA))))
- (MOVE L ,(register-reference temp-1) (A 7)))))))
-
-(define (generate-invocation-prefix:apply-closure frame-size receiver-offset)
- (let ((label (generate-label)))
- `(,@(apply-closure-sequence frame-size receiver-offset label)
- (LABEL ,label))))
-
-(define (generate-invocation-prefix:apply-stack frame-size receiver-offset
- n-levels)
- (let ((label (generate-label)))
- `(,@(apply-stack-sequence frame-size receiver-offset n-levels label)
- (LABEL ,label))))
-\f
-;;;; Interpreter Calls
-
-(define-rule statement
- (INTERPRETER-CALL:ACCESS (? environment) (? name))
- (lookup-call entry:compiler-access environment name))
-
-(define-rule statement
- (INTERPRETER-CALL:LOOKUP (? environment) (? name) (? safe?))
- (lookup-call (if safe? entry:compiler-safe-lookup entry:compiler-lookup)
- environment name))
-
-(define-rule statement
- (INTERPRETER-CALL:UNASSIGNED? (? environment) (? name))
- (lookup-call entry:compiler-unassigned? environment name))
-
-(define-rule statement
- (INTERPRETER-CALL:UNBOUND? (? environment) (? name))
- (lookup-call entry:compiler-unbound? environment name))
-
-(define (lookup-call entry environment name)
- (let ((set-environment (expression->machine-register! environment a0)))
- (let ((clear-map (clear-map!)))
- `(,@set-environment
- ,@clear-map
- ,(load-constant name '(A 1))
- (JSR ,entry)
- ,@(make-external-label (generate-label))))))
-
-(define-rule statement
- (INTERPRETER-CALL:ENCLOSE (? number-pushed))
- (decrement-frame-pointer-offset! number-pushed
- `((MOVE L (A 5) ,reg:enclose-result)
- (MOVE B (& ,(ucode-type vector)) ,reg:enclose-result)
- ,(load-non-pointer (ucode-type manifest-vector) number-pushed
- '(@A+ 5))
- ,@(generate-n-times number-pushed 5 '(MOVE L (@A+ 7) (@A+ 5))
- (lambda (generator)
- (generator (allocate-temporary-register! 'DATA)))))
-#| Alternate sequence which minimizes code size.
- DO NOT USE THIS! The `clear-registers!' call does not distinguish between
- registers containing objects and registers containing unboxed things, and
- as a result can write unboxed stuff to memory.
- `(,@(clear-registers! a0 a1 d0)
- (MOVE W (& ,number-pushed) (D 0))
- (JSR ,entry:compiler-enclose))
-|#
- ))
-\f
-(define-rule statement
- (INTERPRETER-CALL:DEFINE (? environment) (? name) (? value))
- (QUALIFIER (not (eq? 'CONS-POINTER (car value))))
- (assignment-call:default entry:compiler-define environment name value))
-
-(define-rule statement
- (INTERPRETER-CALL:SET! (? environment) (? name) (? value))
- (QUALIFIER (not (eq? 'CONS-POINTER (car value))))
- (assignment-call:default entry:compiler-set! environment name value))
-
-(define (assignment-call:default entry environment name value)
- (let ((set-environment (expression->machine-register! environment a0)))
- (let ((set-value (expression->machine-register! value a2)))
- (let ((clear-map (clear-map!)))
- `(,@set-environment
- ,@set-value
- ,@clear-map
- ,(load-constant name '(A 1))
- (JSR ,entry)
- ,@(make-external-label (generate-label)))))))
-
-(define-rule statement
- (INTERPRETER-CALL:DEFINE (? environment) (? name)
- (CONS-POINTER (CONSTANT (? type))
- (REGISTER (? datum))))
- (assignment-call:cons-pointer entry:compiler-define environment name type
- datum))
-
-(define-rule statement
- (INTERPRETER-CALL:SET! (? environment) (? name)
- (CONS-POINTER (CONSTANT (? type))
- (REGISTER (? datum))))
- (assignment-call:cons-pointer entry:compiler-set! environment name type
- datum))
-
-(define (assignment-call:cons-pointer entry environment name type datum)
- (let ((set-environment (expression->machine-register! environment a0)))
- (let ((datum (coerce->any datum)))
- (let ((clear-map (clear-map!)))
- `(,@set-environment
- (MOVE L ,datum ,reg:temp)
- (MOVE B (& ,type) ,reg:temp)
- ,@clear-map
- (MOVE L ,reg:temp (A 2))
- ,(load-constant name '(A 1))
- (JSR ,entry)
- ,@(make-external-label (generate-label)))))))
-\f
-(define-rule statement
- (INTERPRETER-CALL:CACHE-REFERENCE (? extension) (? safe?))
- (let ((set-extension (expression->machine-register! extension a0)))
- (let ((clear-map (clear-map!)))
- `(,@set-extension
- ,@clear-map
- (JSR ,(if safe?
- entry:compiler-safe-reference-trap
- entry:compiler-reference-trap))
- ,@(make-external-label (generate-label))))))
-
-(define-rule statement
- (INTERPRETER-CALL:CACHE-ASSIGNMENT (? extension) (? value))
- (QUALIFIER (not (eq? 'CONS-POINTER (car value))))
- (let ((set-extension (expression->machine-register! extension a0)))
- (let ((set-value (expression->machine-register! value a1)))
- (let ((clear-map (clear-map!)))
- `(,@set-extension
- ,@set-value
- ,@clear-map
- (JSR ,entry:compiler-assignment-trap)
- ,@(make-external-label (generate-label)))))))
-
-(define-rule statement
- (INTERPRETER-CALL:CACHE-ASSIGNMENT (? extension)
- (CONS-POINTER (CONSTANT (? type))
- (REGISTER (? datum))))
- (let ((set-extension (expression->machine-register! extension a0)))
- (let ((datum (coerce->any datum)))
- (let ((clear-map (clear-map!)))
- `(,@set-extension
- (MOVE L ,datum ,reg:temp)
- (MOVE B (& ,type) ,reg:temp)
- ,@clear-map
- (MOVE L ,reg:temp (A 1))
- (JSR ,entry:compiler-assignment-trap)
- ,@(make-external-label (generate-label)))))))
-\f
-;;; This is invoked by the top level of the LAP generator.
-
-(define generate/quotation-header
- (let ((declare-constant
- (lambda (entry)
- `(SCHEME-OBJECT ,(cdr entry) ,(car entry)))))
- (lambda (block-label constants references uuo-links)
- `(,@(map declare-constant references)
- ,@(map declare-constant uuo-links)
- ,@(map declare-constant constants)
- ,@(if (or (not (null? references))
- (not (null? uuo-links)))
- `(,@(let ((environment-label (allocate-constant-label)))
- `((SCHEME-OBJECT ,environment-label ENVIRONMENT)
- (LEA (@PCR ,environment-label) (A 0))))
- (MOVE L ,reg:environment (@A 0))
- (LEA (@PCR ,block-label) (A 0))
- ,@(if (null? references)
- '()
- `((LEA (@PCR ,(cdar references)) (A 1))
- ,@(if (null? (cdr references))
- `((JSR ,entry:compiler-cache-variable))
- `(,(load-dnw (length references) 1)
- (JSR ,entry:compiler-cache-variable-multiple)))
- ,@(make-external-label (generate-label))))
- ,@(if (null? uuo-links)
- '()
- `((LEA (@PCR ,(cdar uuo-links)) (A 1))
- ,@(if (null? (cdr uuo-links))
- `((JSR ,entry:compiler-uuo-link))
- `(,(load-dnw (length uuo-links) 1)
- (JSR ,entry:compiler-uuo-link-multiple)))
- ,@(make-external-label (generate-label)))))
- '())))))
-\f
-;;;; Procedure/Continuation Entries
-
-;;; The following calls MUST appear as the first thing at the entry
-;;; point of a procedure. They assume that the register map is clear
-;;; and that no register contains anything of value.
-
-;;; **** The only reason that this is true is that no register is live
-;;; across calls. If that were not true, then we would have to save
-;;; any such registers on the stack so that they would be GC'ed
-;;; appropriately.
-
-(define-rule statement
- (PROCEDURE-HEAP-CHECK (? label))
- (disable-frame-pointer-offset!
- (let ((gc-label (generate-label)))
- `(,@(procedure-header (label->procedure label) gc-label)
- (CMP L ,reg:compiled-memtop (A 5))
- (B GE S (@PCR ,gc-label))))))
-
-;;; Note: do not change the MOVE.W in the setup-lexpr call to a MOVEQ.
-;;; The setup-lexpr code assumes a fixed calling sequence to compute
-;;; the GC address if that is needed. This could be changed so that
-;;; the microcode determined how far to back up based on the argument,
-;;; or by examining the calling sequence.
-
-(define-rule statement
- (SETUP-LEXPR (? label))
- (disable-frame-pointer-offset!
- (let ((procedure (label->procedure label)))
- `(,@(procedure-header procedure false)
- (MOVE W
- (& ,(+ (procedure-required procedure)
- (procedure-optional procedure)
- (if (procedure/closure? procedure) 1 0)))
- (D 1))
- (MOVEQ (& ,(if (procedure-rest procedure) 1 0)) (D 2))
- (JSR , entry:compiler-setup-lexpr)))))
-
-(define-rule statement
- (CONTINUATION-HEAP-CHECK (? internal-label))
- (enable-frame-pointer-offset!
- (continuation-frame-pointer-offset (label->continuation internal-label)))
- (let ((gc-label (generate-label)))
- `((LABEL ,gc-label)
- (JSR ,entry:compiler-interrupt-continuation)
- ,@(make-external-label internal-label)
- (CMP L ,reg:compiled-memtop (A 5))
- (B GE S (@PCR ,gc-label)))))
-\f
-(define (procedure-header procedure gc-label)
- (let ((internal-label (procedure-label procedure)))
- (append! (if (procedure/closure? procedure)
- (let ((required (1+ (procedure-required procedure)))
- (optional (procedure-optional procedure))
- (label (procedure-external-label procedure)))
- (if (and (procedure-rest procedure)
- (zero? required))
- (begin (set-procedure-external-label! procedure
- internal-label)
- `((ENTRY-POINT ,internal-label)))
- `((ENTRY-POINT ,label)
- ,@(make-external-label label)
- ,(test-dnw required 0)
- ,@(cond ((procedure-rest procedure)
- `((B GE S (@PCR ,internal-label))))
- ((zero? optional)
- `((B EQ S (@PCR ,internal-label))))
- (else
- (let ((wna-label (generate-label)))
- `((B LT S (@PCR ,wna-label))
- ,(test-dnw (+ required optional) 0)
- (B LE S (@PCR ,internal-label))
- (LABEL ,wna-label)))))
- (JMP ,entry:compiler-wrong-number-of-arguments))))
- '())
- (if gc-label
- `((LABEL ,gc-label)
- (JSR ,entry:compiler-interrupt-procedure))
- '())
- `(,@(make-external-label internal-label)))))
-
-(define (make-external-label label)
- `((DC W (- ,label ,*block-start-label*))
- (LABEL ,label)))
-\f
-;;;; Poppers
-
-(define-rule statement
- (MESSAGE-RECEIVER:CLOSURE (? frame-size))
- (record-push!
- `((MOVE L (& ,(* frame-size 4)) (@-A 7)))))
-
-(define-rule statement
- (MESSAGE-RECEIVER:STACK (? frame-size))
- (record-push!
- `((MOVE L (& ,(+ #x00100000 (* frame-size 4))) (@-A 7)))))
-
-(define-rule statement
- (MESSAGE-RECEIVER:SUBPROBLEM (? label))
- (record-continuation-frame-pointer-offset! label)
- (increment-frame-pointer-offset! 2
- `((PEA (@PCR ,label))
- (MOVE B (& ,type-code:return-address) (@A 7))
- (MOVE L (& #x00200000) (@-A 7)))))
-
-(define (apply-closure-sequence frame-size receiver-offset label)
- `(,(load-dnw frame-size 1)
- (LEA (@AO 7 ,(* (+ receiver-offset (frame-pointer-offset)) 4)) (A 0))
- (LEA (@PCR ,label) (A 1))
- (JMP ,popper:apply-closure)))
-
-(define (apply-stack-sequence frame-size receiver-offset n-levels label)
- `((MOVEQ (& ,n-levels) (D 0))
- ,(load-dnw frame-size 1)
- (LEA (@AO 7 ,(* (+ receiver-offset (frame-pointer-offset)) 4)) (A 0))
- (LEA (@PCR ,label) (A 1))
- (JMP ,popper:apply-stack)))
-
-(define-rule statement
- (MESSAGE-SENDER:VALUE (? receiver-offset))
- (disable-frame-pointer-offset!
- `(,@(clear-map!)
- ,@(increment-anl 7 (+ receiver-offset (frame-pointer-offset)))
(define popper:value '(@AO 6 #x01E8))
\ No newline at end of file
projects / mit-scheme.git / commitdiff