-(in-package "SB!VM")
+;;;; the MIPS VM definition of SAP operations
+
+;;;; 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")
\f
;;;; Moves and coercions:
;;; Move a tagged SAP to an untagged representation.
-;;;
(define-vop (move-to-sap)
- (:args (x :scs (descriptor-reg)))
+ (:args (x :scs (any-reg descriptor-reg)))
(:results (y :scs (sap-reg)))
- (:note "system area pointer indirection")
+ (:note "pointer to SAP coercion")
(:generator 1
(loadw y x sap-pointer-slot other-pointer-lowtag)))
-;;;
(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 (x :scs (sap-reg) :target sap))
- (:temporary (:scs (sap-reg) :from (:argument 0)) sap)
+ (:args (sap :scs (sap-reg) :to :save))
(:temporary (:scs (non-descriptor-reg)) ndescr)
(:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
- (:results (y :scs (descriptor-reg)))
- (:note "system area pointer allocation")
+ (:results (res :scs (descriptor-reg)))
+ (:note "SAP to pointer coercion")
(:generator 20
- (move sap x)
- (with-fixed-allocation (y pa-flag ndescr sap-widetag sap-size)
- (storew sap y sap-pointer-slot other-pointer-lowtag))))
-;;;
+ (with-fixed-allocation (res pa-flag ndescr sap-widetag sap-size nil)
+ (storew sap res sap-pointer-slot other-pointer-lowtag))))
+
(define-move-vop move-from-sap :move
(sap-reg) (descriptor-reg))
-
-;;; Move untagged sap values.
-;;;
+;;; Move untagged SAP values.
(define-vop (sap-move)
(:args (x :target y
- :scs (sap-reg)
- :load-if (not (location= x y))))
+ :scs (sap-reg)
+ :load-if (not (location= x y))))
(:results (y :scs (sap-reg)
- :load-if (not (location= x y))))
+ :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.
-;;;
+;;; Move untagged SAP arguments/return-values.
(define-vop (move-sap-arg)
(:args (x :target y
- :scs (sap-reg))
- (fp :scs (any-reg)
- :load-if (not (sc-is y sap-reg))))
+ :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-arg :move-arg
(descriptor-reg sap-reg) (sap-reg))
-
-;;; Use standard MOVE-ARGUMENT + coercion to move an untagged sap to a
+;;; Use standard MOVE-ARG + coercion to move an untagged SAP to a
;;; descriptor passing location.
-;;;
(define-move-vop move-arg :move-arg
(sap-reg) (descriptor-reg))
-
-
\f
;;;; SAP-INT and INT-SAP
+;;; The function SAP-INT is used to generate an integer corresponding
+;;; to the system area pointer, suitable for passing to the kernel
+;;; interfaces (which want all addresses specified as integers). The
+;;; function INT-SAP is used to do the opposite conversion. The
+;;; integer representation of a SAP is the byte offset of the SAP from
+;;; the start of the address space.
(define-vop (sap-int)
(:args (sap :scs (sap-reg) :target int))
(:arg-types system-area-pointer)
(:policy :fast-safe)
(:generator 1
(move sap int)))
-
-
\f
;;;; POINTER+ and POINTER-
-
(define-vop (pointer+)
(:translate sap+)
(:args (ptr :scs (sap-reg))
- (offset :scs (signed-reg immediate)))
+ (offset :scs (signed-reg immediate)))
(:arg-types system-area-pointer signed-num)
(:results (res :scs (sap-reg)))
(:result-types system-area-pointer)
(define-vop (pointer-)
(:translate sap-)
(:args (ptr1 :scs (sap-reg))
- (ptr2 :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 subu res ptr1 ptr2)))
-
-
\f
;;;; mumble-SYSTEM-REF and mumble-SYSTEM-SET
-
(macrolet ((def-system-ref-and-set
- (ref-name set-name sc type size &optional signed)
+ (ref-name set-name sc type size &optional signed)
(let ((ref-name-c (symbolicate ref-name "-C"))
- (set-name-c (symbolicate set-name "-C")))
+ (set-name-c (symbolicate set-name "-C")))
`(progn
(define-vop (,ref-name)
- (:translate ,ref-name)
- (:policy :fast-safe)
- (:args (object :scs (sap-reg) :target sap)
- (offset :scs (signed-reg)))
- (:arg-types system-area-pointer signed-num)
- (:results (result :scs (,sc)))
- (:result-types ,type)
- (:temporary (:scs (sap-reg) :from (:argument 0)) sap)
- (:generator 5
- (inst addu sap object offset)
- ,@(ecase size
- (:byte
- (if signed
- '((inst lb result sap 0))
- '((inst lbu result sap 0))))
- (:short
- (if signed
- '((inst lh result sap 0))
- '((inst lhu result sap 0))))
- (:long
- '((inst lw result sap 0)))
- (:single
- '((inst lwc1 result sap 0)))
- (:double
- (ecase *backend-byte-order*
- (:big-endian
- '((inst lwc1 result sap n-word-bytes)
- (inst lwc1-odd result sap 0)))
- (:little-endian
- '((inst lwc1 result sap 0)
- (inst lwc1-odd result sap n-word-bytes))))))
- (inst nop)))
+ (:translate ,ref-name)
+ (:policy :fast-safe)
+ (:args (object :scs (sap-reg) :target sap)
+ (offset :scs (signed-reg)))
+ (:arg-types system-area-pointer signed-num)
+ (:results (result :scs (,sc)))
+ (:result-types ,type)
+ (:temporary (:scs (sap-reg) :from (:argument 0)) sap)
+ (:generator 5
+ (inst addu sap object offset)
+ ,@(ecase size
+ (:byte
+ (if signed
+ '((inst lb result sap 0))
+ '((inst lbu result sap 0))))
+ (:short
+ (if signed
+ '((inst lh result sap 0))
+ '((inst lhu result sap 0))))
+ (:long
+ '((inst lw result sap 0)))
+ (:single
+ '((inst lwc1 result sap 0)))
+ (:double
+ (ecase *backend-byte-order*
+ (:big-endian
+ '((inst lwc1 result sap n-word-bytes)
+ (inst lwc1-odd result sap 0)))
+ (:little-endian
+ '((inst lwc1 result sap 0)
+ (inst lwc1-odd result sap n-word-bytes))))))
+ (inst nop)))
(define-vop (,ref-name-c)
- (:translate ,ref-name)
- (:policy :fast-safe)
- (:args (object :scs (sap-reg)))
- (:arg-types system-area-pointer
- (:constant ,(if (eq size :double)
- ;; We need to be able to add 4.
- `(integer ,(- (ash 1 16))
- ,(- (ash 1 16) 5))
- '(signed-byte 16))))
- (:info offset)
- (:results (result :scs (,sc)))
- (:result-types ,type)
- (:generator 4
- ,@(ecase size
- (:byte
- (if signed
- '((inst lb result object offset))
- '((inst lbu result object offset))))
- (:short
- (if signed
- '((inst lh result object offset))
- '((inst lhu result object offset))))
- (:long
- '((inst lw result object offset)))
- (:single
- '((inst lwc1 result object offset)))
- (:double
- (ecase *backend-byte-order*
- (:big-endian
- '((inst lwc1 result object (+ offset n-word-bytes))
- (inst lwc1-odd result object offset)))
- (:little-endian
- '((inst lwc1 result object offset)
- (inst lwc1-odd result object (+ offset n-word-bytes)))))))
- (inst nop)))
+ (:translate ,ref-name)
+ (:policy :fast-safe)
+ (:args (object :scs (sap-reg)))
+ (:arg-types system-area-pointer
+ (:constant ,(if (eq size :double)
+ ;; We need to be able to add 4.
+ `(integer ,(- (ash 1 16))
+ ,(- (ash 1 16) 5))
+ '(signed-byte 16))))
+ (:info offset)
+ (:results (result :scs (,sc)))
+ (:result-types ,type)
+ (:generator 4
+ ,@(ecase size
+ (:byte
+ (if signed
+ '((inst lb result object offset))
+ '((inst lbu result object offset))))
+ (:short
+ (if signed
+ '((inst lh result object offset))
+ '((inst lhu result object offset))))
+ (:long
+ '((inst lw result object offset)))
+ (:single
+ '((inst lwc1 result object offset)))
+ (:double
+ (ecase *backend-byte-order*
+ (:big-endian
+ '((inst lwc1 result object (+ offset n-word-bytes))
+ (inst lwc1-odd result object offset)))
+ (:little-endian
+ '((inst lwc1 result object offset)
+ (inst lwc1-odd result object (+ offset n-word-bytes)))))))
+ (inst nop)))
(define-vop (,set-name)
- (:translate ,set-name)
- (:policy :fast-safe)
- (:args (object :scs (sap-reg) :target sap)
- (offset :scs (signed-reg))
- (value :scs (,sc) :target result))
- (:arg-types system-area-pointer signed-num ,type)
- (:results (result :scs (,sc)))
- (:result-types ,type)
- (:temporary (:scs (sap-reg) :from (:argument 0)) sap)
- (:generator 5
- (inst addu sap object offset)
- ,@(ecase size
- (:byte
- '((inst sb value sap 0)
- (move result value)))
- (:short
- '((inst sh value sap 0)
- (move result value)))
- (:long
- '((inst sw value sap 0)
- (move result value)))
- (:single
- '((inst swc1 value sap 0)
- (unless (location= result value)
- (inst fmove :single result value))))
- (:double
- (ecase *backend-byte-order*
- (:big-endian
- '((inst swc1 value sap n-word-bytes)
- (inst swc1-odd value sap 0)
- (unless (location= result value)
- (inst fmove :double result value))))
- (:little-endian
- '((inst swc1 value sap 0)
- (inst swc1-odd value sap n-word-bytes)
- (unless (location= result value)
- (inst fmove :double result value)))))))))
+ (:translate ,set-name)
+ (:policy :fast-safe)
+ (:args (object :scs (sap-reg) :target sap)
+ (offset :scs (signed-reg))
+ (value :scs (,sc) :target result))
+ (:arg-types system-area-pointer signed-num ,type)
+ (:results (result :scs (,sc)))
+ (:result-types ,type)
+ (:temporary (:scs (sap-reg) :from (:argument 0)) sap)
+ (:generator 5
+ (inst addu sap object offset)
+ ,@(ecase size
+ (:byte
+ '((inst sb value sap 0)
+ (move result value)))
+ (:short
+ '((inst sh value sap 0)
+ (move result value)))
+ (:long
+ '((inst sw value sap 0)
+ (move result value)))
+ (:single
+ '((inst swc1 value sap 0)
+ (unless (location= result value)
+ (inst fmove :single result value))))
+ (:double
+ (ecase *backend-byte-order*
+ (:big-endian
+ '((inst swc1 value sap n-word-bytes)
+ (inst swc1-odd value sap 0)
+ (unless (location= result value)
+ (inst fmove :double result value))))
+ (:little-endian
+ '((inst swc1 value sap 0)
+ (inst swc1-odd value sap n-word-bytes)
+ (unless (location= result value)
+ (inst fmove :double result value)))))))))
(define-vop (,set-name-c)
- (:translate ,set-name)
- (:policy :fast-safe)
- (:args (object :scs (sap-reg))
- (value :scs (,sc) :target result))
- (:arg-types system-area-pointer
- (:constant ,(if (eq size :double)
- ;; We need to be able to add 4.
- `(integer ,(- (ash 1 16))
- ,(- (ash 1 16) 5))
- '(signed-byte 16)))
- ,type)
- (:info offset)
- (:results (result :scs (,sc)))
- (:result-types ,type)
- (:generator 5
- ,@(ecase size
- (:byte
- '((inst sb value object offset)
- (move result value)))
- (:short
- '((inst sh value object offset)
- (move result value)))
- (:long
- '((inst sw value object offset)
- (move result value)))
- (:single
- '((inst swc1 value object offset)
- (unless (location= result value)
- (inst fmove :single result value))))
- (:double
- (ecase *backend-byte-order*
- (:big-endian
- '((inst swc1 value object (+ offset n-word-bytes))
- (inst swc1-odd value object (+ offset n-word-bytes))
- (unless (location= result value)
- (inst fmove :double result value))))
- (:little-endian
- '((inst swc1 value object offset)
- (inst swc1-odd value object (+ offset n-word-bytes))
- (unless (location= result value)
- (inst fmove :double result value)))))))))))))
+ (:translate ,set-name)
+ (:policy :fast-safe)
+ (:args (object :scs (sap-reg))
+ (value :scs (,sc) :target result))
+ (:arg-types system-area-pointer
+ (:constant ,(if (eq size :double)
+ ;; We need to be able to add 4.
+ `(integer ,(- (ash 1 16))
+ ,(- (ash 1 16) 5))
+ '(signed-byte 16)))
+ ,type)
+ (:info offset)
+ (:results (result :scs (,sc)))
+ (:result-types ,type)
+ (:generator 4
+ ,@(ecase size
+ (:byte
+ '((inst sb value object offset)
+ (move result value)))
+ (:short
+ '((inst sh value object offset)
+ (move result value)))
+ (:long
+ '((inst sw value object offset)
+ (move result value)))
+ (:single
+ '((inst swc1 value object offset)
+ (unless (location= result value)
+ (inst fmove :single result value))))
+ (:double
+ (ecase *backend-byte-order*
+ (:big-endian
+ '((inst swc1 value object (+ offset n-word-bytes))
+ (inst swc1-odd value object (+ offset n-word-bytes))
+ (unless (location= result value)
+ (inst fmove :double result value))))
+ (:little-endian
+ '((inst swc1 value object offset)
+ (inst swc1-odd value object (+ offset n-word-bytes))
+ (unless (location= result value)
+ (inst fmove :double result value)))))))))))))
(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 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-lispobj %set-sap-ref-lispobj
+ descriptor-reg * :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))
-
\f
;;; Noise to convert normal lisp data objects into SAPs.
-
(define-vop (vector-sap)
(:translate vector-sap)
(:policy :fast-safe)
(:result-types system-area-pointer)
(:generator 2
(inst addu sap vector
- (- (* vector-data-offset n-word-bytes) other-pointer-lowtag))))
-
+ (- (* vector-data-offset n-word-bytes) other-pointer-lowtag))))
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