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;;; Continuation-passing style (CPS) intermediate language (IL)
;; Copyright (C) 2013 Free Software Foundation, Inc.
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;;
;;;; This library is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;;; Commentary:
;;;
;;; Information about named primitives, as they appear in $prim and $primcall.
;;;
;;; Code:
(define-module (language cps primitives)
#:use-module (ice-9 match)
#:use-module ((srfi srfi-1) #:select (fold))
#:use-module (srfi srfi-26)
#:use-module (language rtl)
#:export (prim-rtl-instruction
branching-primitive?
prim-arity
))
(define *rtl-instruction-aliases*
'((+ . add) (1+ . add1)
(- . sub) (1- . sub1)
(* . mul) (/ . div)
(quotient . quo) (remainder . rem)
(modulo . mod)
(define! . define)
(vector-set! . vector-set)))
(define *macro-instruction-arities*
'((cache-current-module! . (0 . 2))
(cached-toplevel-box . (1 . 3))
(cached-module-box . (1 . 4))))
(define *branching-primcall-arities*
'((null? . (1 . 1))
(nil? . (1 . 1))
(pair? . (1 . 1))
(struct? . (1 . 1))
(char? . (1 . 1))
(eq? . (1 . 2))
(eqv? . (1 . 2))
(equal? . (1 . 2))
(= . (1 . 2))
(< . (1 . 2))
(> . (1 . 2))
(<= . (1 . 2))
(>= . (1 . 2))))
(define (compute-prim-rtl-instructions)
(let ((table (make-hash-table)))
(for-each
(match-lambda ((inst . _) (hashq-set! table inst inst)))
(rtl-instruction-list))
(for-each
(match-lambda ((prim . inst) (hashq-set! table prim inst)))
*rtl-instruction-aliases*)
(for-each
(match-lambda ((inst . arity) (hashq-set! table inst inst)))
*macro-instruction-arities*)
table))
(define *prim-rtl-instructions* (delay (compute-prim-rtl-instructions)))
;; prim -> rtl-instruction | #f
(define (prim-rtl-instruction name)
(hashq-ref (force *prim-rtl-instructions*) name))
(define (branching-primitive? name)
(and (assq name *branching-primcall-arities*) #t))
(define *prim-arities* (make-hash-table))
(define (prim-arity name)
(or (hashq-ref *prim-arities* name)
(let ((arity (cond
((prim-rtl-instruction name) => rtl-instruction-arity)
((assq name *branching-primcall-arities*) => cdr)
(else
(error "Primitive of unknown arity" name)))))
(hashq-set! *prim-arities* name arity)
arity)))
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