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sap.lisp 8.59 KiB
;;; -*- Package: SPARC -*-
;;;
;;; **********************************************************************
;;; This code was written as part of the CMU Common Lisp project at
;;; Carnegie Mellon University, and has been placed in the public domain.
;;;
(ext:file-comment
"$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/sparc/sap.lisp,v 1.10 2000/08/12 07:33:42 dtc Rel $")
;;;
;;; **********************************************************************
;;;
;;; This file contains the SPARC VM definition of SAP operations.
;;;
;;; Written by William Lott.
;;;
(in-package "SPARC")
;;;; Moves and coercions:
;;; Move a tagged SAP to an untagged representation.
;;;
(define-vop (move-to-sap)
(:args (x :scs (descriptor-reg)))
(:results (y :scs (sap-reg)))
(:note "pointer to SAP coercion")
(:generator 1
(loadw y x sap-pointer-slot other-pointer-type)))
;;;
(define-move-vop move-to-sap :move
(descriptor-reg) (sap-reg))
;;; Move an untagged SAP to a tagged representation.
;;;
(define-vop (move-from-sap)
(:args (sap :scs (sap-reg) :to :save))
(:temporary (:scs (non-descriptor-reg)) ndescr)
(:results (res :scs (descriptor-reg)))
(:note "SAP to pointer coercion")
(:generator 20
(with-fixed-allocation (res ndescr sap-type sap-size)
(storew sap res sap-pointer-slot other-pointer-type))))
;;;
(define-move-vop move-from-sap :move
(sap-reg) (descriptor-reg))
;;; Move untagged sap values.
;;;
(define-vop (sap-move)
(:args (x :target y
:scs (sap-reg)
:load-if (not (location= x y))))
(:results (y :scs (sap-reg)
:load-if (not (location= x y))))
(:note "SAP move")
(:effects)
(:affected)
(:generator 0
(move y x)))
;;;
(define-move-vop sap-move :move
(sap-reg) (sap-reg))
;;; Move untagged sap arguments/return-values.
;;;
(define-vop (move-sap-argument)
(:args (x :target y
:scs (sap-reg))
(fp :scs (any-reg)
:load-if (not (sc-is y sap-reg))))
(:results (y))
(:note "SAP argument move")
(:generator 0
(sc-case y
(sap-reg
(move y x))
(sap-stack
(storew x fp (tn-offset y))))))
;;;
(define-move-vop move-sap-argument :move-argument
(descriptor-reg sap-reg) (sap-reg))
;;; Use standard MOVE-ARGUMENT + coercion to move an untagged sap to a
;;; descriptor passing location.
;;;
(define-move-vop move-argument :move-argument
(sap-reg) (descriptor-reg))
;;;; SAP-INT and INT-SAP
(define-vop (sap-int)
(:args (sap :scs (sap-reg) :target int))
(:arg-types system-area-pointer)
(:results (int :scs (unsigned-reg)))
(:result-types unsigned-num)
(:translate sap-int)
(:policy :fast-safe)
(:generator 1
(move int sap)))
(define-vop (int-sap)
(:args (int :scs (unsigned-reg) :target sap))
(:arg-types unsigned-num)
(:results (sap :scs (sap-reg)))
(:result-types system-area-pointer)
(:translate int-sap)
(:policy :fast-safe)
(:generator 1
(move sap int)))
;;;; POINTER+ and POINTER-
(define-vop (pointer+)
(:translate sap+)
(:args (ptr :scs (sap-reg))
(offset :scs (signed-reg)))
(:arg-types system-area-pointer signed-num)
(:results (res :scs (sap-reg)))
(:result-types system-area-pointer)
(:policy :fast-safe)
(:generator 2
(inst add res ptr offset)))
(define-vop (pointer+-c)
(:translate sap+)
(:args (ptr :scs (sap-reg)))
(:info offset)
(:arg-types system-area-pointer (:constant (signed-byte 13)))
(:results (res :scs (sap-reg)))
(:result-types system-area-pointer)
(:policy :fast-safe)
(:generator 1
(inst add res ptr offset)))
(define-vop (pointer-)
(:translate sap-)
(:args (ptr1 :scs (sap-reg))
(ptr2 :scs (sap-reg)))
(:arg-types system-area-pointer system-area-pointer)
(:policy :fast-safe)
(:results (res :scs (signed-reg)))
(:result-types signed-num)
(:generator 1
(inst sub res ptr1 ptr2)))
;;;; mumble-SYSTEM-REF and mumble-SYSTEM-SET
(eval-when (compile eval)
(defmacro def-system-ref-and-set
(ref-name set-name sc type size &optional signed)
(let ((ref-name-c (symbolicate ref-name "-C"))
(set-name-c (symbolicate set-name "-C")))
`(progn
(define-vop (,ref-name)
(:translate ,ref-name)
(:policy :fast-safe)
(:args (sap :scs (sap-reg))
(offset :scs (signed-reg)))
(:arg-types system-area-pointer signed-num)
(:results (result :scs (,sc)))
(:result-types ,type)
(:generator 5
,@(if (eql size :long-float)
'((load-long-reg result sap offset t))
`((inst ,(ecase size
(:byte (if signed 'ldsb 'ldub))
(:short (if signed 'ldsh 'lduh))
(:long 'ld)
(:single 'ldf)
(:double 'lddf))
result sap offset)))))
(define-vop (,ref-name-c)
(:translate ,ref-name)
(:policy :fast-safe)
(:args (sap :scs (sap-reg)))
(:arg-types system-area-pointer (:constant (signed-byte 13)))
(:info offset)
(:results (result :scs (,sc)))
(:result-types ,type)
(:generator 4
,@(if (eql size :long-float)
'((load-long-reg result sap offset t))
`((inst ,(ecase size
(:byte (if signed 'ldsb 'ldub))
(:short (if signed 'ldsh 'lduh))
(:long 'ld)
(:single 'ldf)
(:double 'lddf))
result sap offset)))))
(define-vop (,set-name)
(:translate ,set-name)
(:policy :fast-safe)
(:args (sap :scs (sap-reg))
(offset :scs (signed-reg))
(value :scs (,sc) :target result))
(:arg-types system-area-pointer signed-num ,type)
(:results (result :scs (,sc)))
(:result-types ,type)
(:generator 5
,@(if (eql size :long-float)
'((store-long-reg value sap offset t))
`((inst ,(ecase size
(:byte 'stb)
(:short 'sth)
(:long 'st)
(:single 'stf)
(:double 'stdf))
value sap offset)))
(unless (location= result value)
,@(case size
(:single
'((inst fmovs result value)))
(:double
'((move-double-reg result value)))
(:long-float
'((move-long-reg result value)))
(t
'((inst move result value)))))))
(define-vop (,set-name-c)
(:translate ,set-name)
(:policy :fast-safe)
(:args (sap :scs (sap-reg))
(value :scs (,sc) :target result))
(:arg-types system-area-pointer (:constant (signed-byte 13)) ,type)
(:info offset)
(:results (result :scs (,sc)))
(:result-types ,type)
(:generator 4
,@(if (eql size :long-float)
'((store-long-reg value sap offset t))
`((inst ,(ecase size
(:byte 'stb)
(:short 'sth)
(:long 'st)
(:single 'stf)
(:double 'stdf))
value sap offset)))
(unless (location= result value)
,@(case size
(:single
'((inst fmovs result value)))
(:double
'((move-double-reg result value)))
(:long-float
'((move-long-reg result value)))
(t
'((inst move result value))))))))))
); eval-when (compile eval)
(def-system-ref-and-set sap-ref-8 %set-sap-ref-8
unsigned-reg positive-fixnum :byte nil)
(def-system-ref-and-set signed-sap-ref-8 %set-signed-sap-ref-8
signed-reg tagged-num :byte t)
(def-system-ref-and-set sap-ref-16 %set-sap-ref-16
unsigned-reg positive-fixnum :short nil)
(def-system-ref-and-set signed-sap-ref-16 %set-signed-sap-ref-16
signed-reg tagged-num :short t)
(def-system-ref-and-set sap-ref-32 %set-sap-ref-32
unsigned-reg unsigned-num :long nil)
(def-system-ref-and-set signed-sap-ref-32 %set-signed-sap-ref-32
signed-reg signed-num :long t)
(def-system-ref-and-set sap-ref-sap %set-sap-ref-sap
sap-reg system-area-pointer :long)
(def-system-ref-and-set sap-ref-single %set-sap-ref-single
single-reg single-float :single)
(def-system-ref-and-set sap-ref-double %set-sap-ref-double
double-reg double-float :double)
#+long-float
(def-system-ref-and-set sap-ref-long %set-sap-ref-long
long-reg long-float :long-float)
;;; Noise to convert normal lisp data objects into SAPs.
(define-vop (vector-sap)
(:translate vector-sap)
(:policy :fast-safe)
(:args (vector :scs (descriptor-reg)))
(:results (sap :scs (sap-reg)))
(:result-types system-area-pointer)
(:generator 2
(inst add sap vector
(- (* vector-data-offset word-bytes) other-pointer-type))))
;;; Transforms for 64-bit SAP accessors.
(deftransform sap-ref-64 ((sap offset) (* *))
'(logior (ash (sap-ref-32 sap offset) 32)
(sap-ref-32 sap (+ offset 4))))
(deftransform signed-sap-ref-64 ((sap offset) (* *))
'(logior (ash (signed-sap-ref-32 sap offset) 32)
(sap-ref-32 sap (+ 4 offset))))
(deftransform %set-sap-ref-64 ((sap offset value) (* * *))
'(progn
(%set-sap-ref-32 sap offset (ash value -32))
(%set-sap-ref-32 sap (+ offset 4) (logand value #xffffffff))))
(deftransform %set-signed-sap-ref-64 ((sap offset value) (* * *))
'(progn
(%set-signed-sap-ref-32 sap offset (ash value -32))
(%set-sap-ref-32 sap (+ 4 offset) (logand value #xffffffff))))