X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86-64%2Fc-call.lisp;h=afbe8578a1680b0a6076c200f052899eaa1c3ec0;hb=ba871531b6b394da295c9a4527346e1e6327ccca;hp=32fb566f0d3a5a22f398c7574984cada9b97016c;hpb=ee41b142b86e50983bd885141eaf2ede02815000;p=sbcl.git

diff --git a/src/compiler/x86-64/c-call.lisp b/src/compiler/x86-64/c-call.lisp
index 32fb566..afbe857 100644
--- a/src/compiler/x86-64/c-call.lisp
+++ b/src/compiler/x86-64/c-call.lisp
@@ -150,6 +150,10 @@
               (lambda-vars arg)
               (cond ((and (alien-integer-type-p type)
                           (> (sb!alien::alien-integer-type-bits type) 64))
+                     ;; CLH: FIXME! This should really be
+                     ;; #xffffffffffffffff. nyef says: "Passing
+                     ;; 128-bit integers to ALIEN functions on x86-64
+                     ;; believed to be broken."
                      (new-args `(logand ,arg #xffffffff))
                      (new-args `(ash ,arg -64))
                      (new-arg-types (parse-alien-type '(unsigned 64) env))
@@ -331,27 +335,16 @@
                                     (- other-pointer-lowtag)))
               delta)))))
 
-;;; these are not strictly part of the c-call convention, but are
-;;; needed for the WITH-PRESERVED-POINTERS macro used for "locking
-;;; down" lisp objects so that GC won't move them while foreign
-;;; functions go to work.
-
-(define-vop (push-word-on-c-stack)
-    (:translate push-word-on-c-stack)
-  (:args (val :scs (sap-reg)))
-  (:policy :fast-safe)
-  (:arg-types system-area-pointer)
-  (:generator 2
-    (inst push val)))
-
-(define-vop (pop-words-from-c-stack)
-    (:translate pop-words-from-c-stack)
-  (:args)
-  (:arg-types (:constant (unsigned-byte 60)))
-  (:info number)
+;;; not strictly part of the c-call convention, but needed for the
+;;; WITH-PINNED-OBJECTS macro used for "locking down" lisp objects so
+;;; that GC won't move them while foreign functions go to work.
+(define-vop (touch-object)
+  (:translate touch-object)
+  (:args (object))
+  (:ignore object)
   (:policy :fast-safe)
-  (:generator 2
-    (inst add rsp-tn (fixnumize number))))
+  (:arg-types t)
+  (:generator 0))
 
 ;;; Callbacks