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Diffstat (limited to 'module/language/rtl.scm')
-rw-r--r-- | module/language/rtl.scm | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/module/language/rtl.scm b/module/language/rtl.scm new file mode 100644 index 000000000..d21751719 --- /dev/null +++ b/module/language/rtl.scm @@ -0,0 +1,92 @@ +;;; Register Transfer Language (RTL) + +;; 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 + +;;; Code: + +(define-module (language rtl) + #:use-module (ice-9 match) + #:use-module ((srfi srfi-1) #:select (fold)) + #:use-module (system vm instruction) + #:re-export (rtl-instruction-list) + #:export (rtl-instruction-arity)) + +(define (compute-rtl-instruction-arity name args) + (define (first-word-arity word) + (case word + ((U8_X24) 0) + ((U8_U24) 1) + ((U8_L24) 1) + ((U8_U8_I16) 2) + ((U8_U12_U12) 2) + ((U8_U8_U8_U8) 3))) + (define (tail-word-arity word) + (case word + ((U8_U24) 2) + ((U8_L24) 2) + ((U8_U8_I16) 3) + ((U8_U12_U12) 3) + ((U8_U8_U8_U8) 4) + ((U32) 1) + ((I32) 1) + ((A32) 1) + ((B32) 0) + ((N32) 1) + ((S32) 1) + ((L32) 1) + ((LO32) 1) + ((X8_U24) 1) + ((X8_U12_U12) 2) + ((X8_L24) 1) + ((B1_X7_L24) 2) + ((B1_U7_L24) 3) + ((B1_X31) 1) + ((B1_X7_U24) 2))) + (match args + ((arg0 . args) + (fold (lambda (arg arity) + (+ (tail-word-arity arg) arity)) + (first-word-arity arg0) + args)))) + +(define *macro-instruction-arities* + '((cache-current-module! . (0 . 2)) + (cached-toplevel-box . (1 . 3)) + (cached-module-box . (1 . 4)))) + +(define (compute-rtl-instruction-arities) + (let ((table (make-hash-table))) + (for-each + (match-lambda + ;; Put special cases here. + ((name op '! . args) + (hashq-set! table name + (cons 0 (compute-rtl-instruction-arity name args)))) + ((name op '<- . args) + (hashq-set! table name + (cons 1 (1- (compute-rtl-instruction-arity name args)))))) + (rtl-instruction-list)) + (for-each (match-lambda + ((name . arity) + (hashq-set! table name arity))) + *macro-instruction-arities*) + table)) + +(define *rtl-instruction-arities* (delay (compute-rtl-instruction-arities))) + +(define (rtl-instruction-arity name) + (hashq-ref (force *rtl-instruction-arities*) name)) |