X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fmips%2Fsap.lisp;h=fcd879aa6bdedc6cddf450bc5a5270a0f8228ed0;hb=a2ff6543c79752bfe42578f794bda1c28167fd10;hp=c8df0695099856345dd8c4f47b862832084355ce;hpb=4ae1b794a5d6a90794468cf8017f5307f2c30dfe;p=sbcl.git

diff --git a/src/compiler/mips/sap.lisp b/src/compiler/mips/sap.lisp
index c8df069..fcd879a 100644
--- a/src/compiler/mips/sap.lisp
+++ b/src/compiler/mips/sap.lisp
@@ -1,10 +1,19 @@
-(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")
 
 ;;;; 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)))
@@ -12,13 +21,10 @@
   (: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)
@@ -30,13 +36,11 @@
     (move sap x)
     (with-fixed-allocation (y pa-flag ndescr sap-widetag sap-size)
       (storew sap y sap-pointer-slot other-pointer-lowtag))))
-;;;
+
 (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)
@@ -47,13 +51,11 @@
   (: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-arg)
   (:args (x :target y
 	    :scs (sap-reg))
@@ -66,21 +68,16 @@
        (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))
-
-
 
 ;;;; SAP-INT and INT-SAP
-
 (define-vop (sap-int)
   (:args (sap :scs (sap-reg) :target int))
   (:arg-types system-area-pointer)
@@ -100,11 +97,8 @@
   (:policy :fast-safe)
   (:generator 1
     (move sap int)))
-
-
 
 ;;;; POINTER+ and POINTER-
-
 (define-vop (pointer+)
   (:translate sap+)
   (:args (ptr :scs (sap-reg))
@@ -130,11 +124,8 @@
   (:result-types signed-num)
   (:generator 1
     (inst subu res ptr1 ptr2)))
-
-
 
 ;;;; mumble-SYSTEM-REF and mumble-SYSTEM-SET
-
 (macrolet ((def-system-ref-and-set
 	  (ref-name set-name sc type size &optional signed)
   (let ((ref-name-c (symbolicate ref-name "-C"))
@@ -307,10 +298,8 @@
     single-reg single-float :single)
   (def-system-ref-and-set sap-ref-double %set-sap-ref-double
     double-reg double-float :double))
-
 
 ;;; Noise to convert normal lisp data objects into SAPs.
-
 (define-vop (vector-sap)
   (:translate vector-sap)
   (:policy :fast-safe)
@@ -320,4 +309,38 @@
   (:generator 2
     (inst addu sap vector
 	  (- (* vector-data-offset n-word-bytes) other-pointer-lowtag))))
+
+;;; Transforms for 64-bit SAP accessors.
+#!+little-endian
+(progn
+  (deftransform sap-ref-64 ((sap offset) (* *))
+    '(logior (sap-ref-32 sap offset)
+	     (ash (sap-ref-32 sap (+ offset 4)) 32)))
+  (deftransform signed-sap-ref-64 ((sap offset) (* *))
+    '(logior (sap-ref-32 sap offset)
+	     (ash (signed-sap-ref-32 sap (+ offset 4)) 32)))
+  (deftransform %set-sap-ref-64 ((sap offset value) (* * *))
+    '(progn
+       (%set-sap-ref-32 sap offset (logand value #xffffffff))
+       (%set-sap-ref-32 sap (+ offset 4) (ash value -32))))
+  (deftransform %set-signed-sap-ref-64 ((sap offset value) (* * *))
+    '(progn
+       (%set-sap-ref-32 sap offset (logand value #xffffffff))
+       (%set-signed-sap-ref-32 sap (+ offset 4) (ash value -32)))))
+#!-little-endian
+(progn
+  (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)))))