-;;; -*- Package: ALPHA -*-
-;;;
-;;; **********************************************************************
-;;; This code was written as part of the CMU Common Lisp project at
-;;; Carnegie Mellon University, and has been placed in the public domain.
-;;;
-
-;;;
-;;; **********************************************************************
-;;;
-;;; This file contains the MIPS VM definition of operand loading/saving and
-;;; the Move VOP.
-;;;
-;;; Written by Rob MacLachlan.
-;;; Conversion by Sean Hallgren.
-;;;
-(in-package "SB!VM")
+;;;; the Alpha VM definition of operand loading/saving and the Move VOP
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; This software is derived from the CMU CL system, which was
+;;;; written at Carnegie Mellon University and released into the
+;;;; public domain. The software is in the public domain and is
+;;;; provided with absolutely no warranty. See the COPYING and CREDITS
+;;;; files for more information.
+(in-package "SB!VM")
(define-move-function (load-immediate 1) (vop x y)
((null zero immediate)
(unsigned-reg) (unsigned-stack))
(let ((nfp (current-nfp-tn vop)))
(storeq x nfp (tn-offset y))))
-
\f
-;;;; The Move VOP:
-;;;
+;;;; The Move VOP
+
(define-vop (move)
(:args (x :target y
:scs (any-reg descriptor-reg zero null)
(any-reg descriptor-reg zero null)
(any-reg descriptor-reg))
-;;; Make Move the check VOP for T so that type check generation doesn't think
-;;; it is a hairy type. This also allows checking of a few of the values in a
-;;; continuation to fall out.
-;;;
+;;; Make Move the check VOP for T so that type check generation
+;;; doesn't think it is a hairy type. This also allows checking of a
+;;; few of the values in a continuation to fall out.
(primitive-type-vop move (:check) t)
-;;; The Move-Argument VOP is used for moving descriptor values into another
-;;; frame for argument or known value passing.
-;;;
+;;; The Move-Argument VOP is used for moving descriptor values into
+;;; another frame for argument or known value passing.
(define-vop (move-argument)
(:args (x :target y
:scs (any-reg descriptor-reg null zero))
(define-move-vop move-argument :move-argument
(any-reg descriptor-reg null zero)
(any-reg descriptor-reg))
-
-
\f
;;;; ILLEGAL-MOVE
-;;; This VOP exists just to begin the lifetime of a TN that couldn't be written
-;;; legally due to a type error. An error is signalled before this VOP is
-;;; so we don't need to do anything (not that there would be anything sensible
-;;; to do anyway.)
-;;;
+;;; This VOP exists just to begin the lifetime of a TN that couldn't
+;;; be written legally due to a type error. An error is signalled
+;;; before this VOP is so we don't need to do anything (not that there
+;;; would be anything sensible to do anyway.)
(define-vop (illegal-move)
(:args (x) (type))
(:results (y))
(:save-p :compute-only)
(:generator 666
(error-call vop object-not-type-error x type)))
-
-
\f
-;;;; Moves and coercions:
-
-;;; These MOVE-TO-WORD VOPs move a tagged integer to a raw full-word
-;;; representation. Similarly, the MOVE-FROM-WORD VOPs converts a raw integer
-;;; to a tagged bignum or fixnum.
-
-;;; Arg is a fixnum, so just shift it. We need a type restriction because some
-;;; possible arg SCs (control-stack) overlap with possible bignum arg SCs.
-;;;
+;;;; moves and coercions
+;;;;
+;;;; These MOVE-TO-WORD VOPs move a tagged integer to a raw full-word
+;;;; representation. Similarly, the MOVE-FROM-WORD VOPs converts a raw
+;;;; integer to a tagged bignum or fixnum.
+
+;;; Arg is a fixnum, so just shift it. We need a type restriction
+;;; because some possible arg SCs (control-stack) overlap with
+;;; possible bignum arg SCs.
(define-vop (move-to-word/fixnum)
(:args (x :scs (any-reg descriptor-reg)))
(:results (y :scs (signed-reg unsigned-reg)))
(descriptor-reg) (signed-reg unsigned-reg))
-;;; Result is a fixnum, so we can just shift. We need the result type
+;;; Result is a fixnum, so we can just shift. We need the result type
;;; restriction because of the control-stack ambiguity noted above.
-;;;
(define-vop (move-from-word/fixnum)
(:args (x :scs (signed-reg unsigned-reg)))
(:results (y :scs (any-reg descriptor-reg)))
(define-move-vop move-from-word/fixnum :move
(signed-reg unsigned-reg) (any-reg descriptor-reg))
-;;; Result may be a bignum, so we have to check. Use a worst-case cost to make
-;;; sure people know they may be number consing.
-;;;
+;;; Result may be a bignum, so we have to check. Use a worst-case cost
+;;; to make sure people know they may be number consing.
(define-vop (move-from-signed)
(:args (arg :scs (signed-reg unsigned-reg) :target x))
(:results (y :scs (any-reg descriptor-reg)))
(define-move-vop move-from-signed :move
(signed-reg) (descriptor-reg))
-
-;;; Check for fixnum, and possibly allocate one or two word bignum result. Use
-;;; a worst-case cost to make sure people know they may be number consing.
-;;;
+;;; Check for fixnum, and possibly allocate one or two word bignum
+;;; result. Use a worst-case cost to make sure people know they may be
+;;; number consing.
(define-vop (move-from-unsigned)
(:args (arg :scs (signed-reg unsigned-reg) :target x))
(:results (y :scs (any-reg descriptor-reg)))
(define-move-vop move-from-unsigned :move
(unsigned-reg) (descriptor-reg))
-
;;; Move untagged numbers.
-;;;
(define-vop (word-move)
(:args (x :target y
:scs (signed-reg unsigned-reg)
(define-move-vop word-move :move
(signed-reg unsigned-reg) (signed-reg unsigned-reg))
-
;;; Move untagged number arguments/return-values.
-;;;
(define-vop (move-word-argument)
(:args (x :target y
:scs (signed-reg unsigned-reg))
(descriptor-reg any-reg signed-reg unsigned-reg) (signed-reg unsigned-reg))
-;;; Use standard MOVE-ARGUMENT + coercion to move an untagged number to a
-;;; descriptor passing location.
-;;;
+;;; Use standard MOVE-ARGUMENT + coercion to move an untagged number
+;;; to a descriptor passing location.
(define-move-vop move-argument :move-argument
(signed-reg unsigned-reg) (any-reg descriptor-reg))
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