151 lines
4.9 KiB
Scheme
151 lines
4.9 KiB
Scheme
;;; Part of Scheme 48 1.9. See file COPYING for notices and license.
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;;;
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;;; Port Author: Andrew Whatson
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;;;
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;;; Original Authors: Richard Kelsey
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;;;
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;;; scheme48-1.9.2/ps-compiler/node/primop.scm
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;;;
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;;; The information about a primitive operation.
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(define-module (ps-compiler node primop)
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#:export (primop? make-primop make-proc-primop make-conditional-primop
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all-primops get-primop
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primop-id primop-trivial? primop-side-effects
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primop-cost
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simplify-call
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primop-procedure? primop-call-index
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primop-conditional?
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expand-to-conditional
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simplify-conditional?
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primop-code-data set-primop-code-data!
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trivial-call-return-type
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primop
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loc/owner loc/type loc/rep
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set/owner set/type set/rep set/value))
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(define-record-type primop
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(id ;; Symbol identifying this primop
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trivial? ;; #t if this primop has does not require a continuation
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side-effects ;; side-effects of this primop
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simplify-call-proc ;; Simplify method
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primop-cost-proc ;; Cost of executing this operation
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;; (in some undisclosed metric)
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return-type-proc ;; Give the return type (for trivial primops only)
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proc-data ;; Record containing more data for the procedure primops
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cond-data ;; Record containing more data for conditional primops
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)
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(code-data ;; Code generation data
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))
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(define-record-discloser type/primop
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(lambda (primop)
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(list 'primop (object-hash primop) (primop-id primop))))
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(define all-primops (make-vector primop-count))
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(define (make-primop id trivial? side-effects simplify cost type)
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(let ((enum (name->enumerand id primop))
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(primop (primop-maker id trivial? side-effects simplify cost type #f #f)))
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(if enum
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(vector-set! all-primops enum primop))
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primop))
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(define (get-primop enum)
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(vector-ref all-primops enum))
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(define-local-syntax (define-primop-method id args)
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`(define (,id . ,args)
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((,(concatenate-symbol 'primop- id '- 'proc) (call-primop ,(car args)))
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. ,args)))
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(define-primop-method primop-cost (call))
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(define-primop-method simplify-call (call))
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(define (trivial-call-return-type call)
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((primop-return-type-proc (call-primop call)) call))
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;;-------------------------------------------------------------------------------
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;; procedure primops
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(define-subrecord primop primop-proc-data primop-proc-data
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(call-index ;; index of argument being called
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)
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())
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(define (primop-procedure? primop)
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(if (primop-proc-data primop) #t #f))
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;; (call <cont> <proc-var> . <args>)
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;; (tail-call <cont-var> <proc-var> . <args>)
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;; (return <proc-var> . <args>)
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;; (jump <proc-var> . <args>)
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;; (throw <proc-var> . <args>)
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;;
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;; (unknown-call <cont> <proc-var> . <args>)
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;; (unknown-tail-call <cont-var> <proc-var> . <args>)
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;; (unknown-return <proc-var> . <args>)
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(define (make-proc-primop id side-effects simplify cost index)
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(let* ((enum (name->enumerand id primop))
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(data (primop-proc-data-maker index))
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(primop (primop-maker id #f side-effects simplify cost #f data #f)))
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(vector-set! all-primops enum primop)
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primop))
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;;-------------------------------------------------------------------------------
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;; conditional primops
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(define-subrecord primop primop-cond-data primop-cond-data
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(expand-to-conditional-proc ;; Expand this call to a conditional
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simplify-conditional?-proc ;; Can this conditional be simplified
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)
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())
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(define-primop-method expand-to-conditional (call))
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(define-primop-method simplify-conditional? (call index value))
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(define (primop-conditional? primop)
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(if (primop-cond-data primop) #t #f))
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(define (make-conditional-primop id side-effects simplify cost expand simplify?)
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(let* ((enum (name->enumerand id primop))
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(data (primop-cond-data-maker expand simplify?))
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(primop (primop-maker id #f side-effects simplify cost #f #f data)))
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(if enum (vector-set! all-primops enum primop))
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primop))
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;;-------------------------------------------------------------------------------
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;; Random constants for location calls:
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;;
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;; ($CONTENTS <thing> <type> <offset> <rep>)
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;; ($SET-CONTENTS <cont> <thing> <type> <offset> <rep> <value>)
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;; 0 1 2 3 4
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(define loc/owner 0)
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(define loc/type 1)
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(define loc/rep 2)
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(define set/owner 1)
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(define set/type 2)
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(define set/rep 3)
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(define set/value 4)
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;; For slots that do not contain code pointers:
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;; ($CLOSURE <cont> <env> <slot>)
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;; ($SET-CLOSURE <cont> <env> <slot> <value>)
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;; For slots that do contain code pointers:
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;; ($MAKE-PROCEDURE <cont> <env> <slot>)
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;; ($SET-CODE <cont> <env> <slot> <value>)
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;; For known calls to slots that contain code pointers:
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;; ($ENV-ADJUST <cont> <env> <slot>)
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;; 0 1 2
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(define env/owner 0)
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(define env/offset 1)
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(define env/value 2)
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