;;;; -*- Mode: Lisp; Syntax: Common-Lisp; Package: C -*- ;;;; ;;;; CMPCT -- Optimizer for several constant values ;;;; Copyright (c) 2003, Juan Jose Garcia Ripoll. ;;;; ;;;; ECoLisp is free software; you can redistribute it and/or ;;;; modify it under the terms of the GNU Library General Public ;;;; License as published by the Free Software Foundation; either ;;;; version 2 of the License, or (at your option) any later version. ;;;; ;;;; See file '../Copyright' for full details. (in-package "COMPILER") (defparameter +optimizable-constants+ '()) (defun c1constant-value (val &key always only-small-values) (cond ((let ((x (assoc val +optimizable-constants+))) (when x (pushnew "#include " *clines-string-list*) (setf x (cdr x)) (if (listp x) (c1expr x) x)))) ((eq val nil) (c1nil)) ((eq val t) (c1t)) ((sys::fixnump val) (make-c1form* 'LOCATION :type 'FIXNUM :args (list 'FIXNUM-VALUE val))) ((characterp val) (make-c1form* 'LOCATION :type 'CHARACTER :args (list 'CHARACTER-VALUE (char-code val)))) ((typep val 'DOUBLE-FLOAT) (make-c1form* 'LOCATION :type 'DOUBLE-FLOAT :args (list 'DOUBLE-FLOAT-VALUE val (add-object val)))) ((typep val 'SINGLE-FLOAT) (make-c1form* 'LOCATION :type 'SINGLE-FLOAT :args (list 'SINGLE-FLOAT-VALUE val (add-object val)))) ((typep val 'LONG-FLOAT) (make-c1form* 'LOCATION :type 'LONG-FLOAT :args (list 'LONG-FLOAT-VALUE val (add-object val)))) (always (make-c1form* 'LOCATION :type (object-type val) :args (add-object val))) (only-small-values nil) (t nil))) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;; ;;; KNOWN OPTIMIZABLE CONSTANTS ;;; (mapc #'(lambda (record) (let* ((name (first record)) (c-value (second record))) (push (cond ((symbolp name) (let* ((value (symbol-value name)) (type (lisp-type->rep-type (type-of value)))) (cons value `(c-inline () () ,type ,c-value :one-liner t :side-effects nil)))) ((floatp name) (let* ((value name) (type (type-of value)) (loc-type (case type (single-float 'single-float-value) (double-float 'double-float-value) (long-float 'long-float-value))) (location (make-vv :location c-value :value value))) (cons value (make-c1form* 'LOCATION :type type :args (list loc-type value location))))) (t (cons name (make-c1form* 'LOCATION :type (type-of name) :args (make-vv :location c-value :value name))))) +optimizable-constants+))) (reverse `((MOST-POSITIVE-SHORT-FLOAT "FLT_MAX") (MOST-POSITIVE-SINGLE-FLOAT "FLT_MAX") (MOST-NEGATIVE-SHORT-FLOAT "-FLT_MAX") (MOST-NEGATIVE-SINGLE-FLOAT "-FLT_MAX") (LEAST-POSITIVE-SHORT-FLOAT "FLT_MIN") (LEAST-POSITIVE-SINGLE-FLOAT "FLT_MIN") (LEAST-POSITIVE-NORMALIZED-SHORT-FLOAT "FLT_MIN") (LEAST-POSITIVE-NORMALIZED-SINGLE-FLOAT" FLT_MIN") (LEAST-NEGATIVE-SHORT-FLOAT "-FLT_MIN") (LEAST-NEGATIVE-SINGLE-FLOAT "-FLT_MIN") (LEAST-NEGATIVE-NORMALIZED-SHORT-FLOAT "-FLT_MIN") (LEAST-NEGATIVE-NORMALIZED-SINGLE-FLOAT "-FLT_MIN") (MOST-POSITIVE-DOUBLE-FLOAT "DBL_MAX") (MOST-NEGATIVE-DOUBLE-FLOAT "-DBL_MAX") (LEAST-POSITIVE-DOUBLE-FLOAT "DBL_MIN") (LEAST-POSITIVE-NORMALIZED-DOUBLE-FLOAT "DBL_MIN") (LEAST-NEGATIVE-DOUBLE-FLOAT "-DBL_MIN") (LEAST-NEGATIVE-NORMALIZED-DOUBLE-FLOAT "-DBL_MIN") ;; Order is important: on platforms where 0.0 and -0.0 are the same ;; the last one is prioritized. (#.(coerce 0 'single-float) "cl_core.singlefloat_zero") (#.(coerce 0 'double-float) "cl_core.doublefloat_zero") (#.(coerce -0.0 'single-float) "cl_core.singlefloat_minus_zero") (#.(coerce -0.0 'double-float) "cl_core.doublefloat_minus_zero") (#.(si::standard-readtable) "cl_core.standard_readtable") (#.(find-package :cl) "cl_core.lisp_package") (#.(find-package :cl-user) "cl_core.user_package") (#.(find-package :keyword) "cl_core.keyword_package") (#.(find-package :clos) "cl_core.clos_package") #+threads (#.(find-package :mp) "cl_core.mp_package") #+long-float ,@'( (MOST-POSITIVE-LONG-FLOAT "LDBL_MAX") (MOST-NEGATIVE-LONG-FLOAT "-LDBL_MAX") (LEAST-POSITIVE-LONG-FLOAT "LDBL_MIN") (LEAST-POSITIVE-NORMALIZED-LONG-FLOAT" LDBL_MIN") (LEAST-NEGATIVE-LONG-FLOAT "-LDBL_MIN") (LEAST-NEGATIVE-NORMALIZED-LONG-FLOAT "-LDBL_MIN") (#.(coerce 0 'long-float) "cl_core.longfloat_zero") (#.(coerce -0.0 'long-float) "cl_core.longfloat_minus_zero") ) )))