1.0.5.53: cleanup LOAD-TYPE macros

	* when the LOAD-TYPE macros in the various backends hardcoded '3',
	  they really meant (1- N-WORD-BYTES)--a little reflection on
	  widetags, lowtags, and endian orderings should make this clear
	  (we don't have a 64-bit big-endian port to drive it home, though);
	* catch the spread of magic constants in code/array.lisp.

make.sh

@@ -65,7 +65,7 @@ if [ "$OSTYPE" = "cygwin" -o "$OSTYPE" = "msys" ] ; then
 else
     DEVNULL=/dev/null
 fi
-SBCL_XC_HOST="${1:-sbcl --disable-debugger --userinit $DEVNULL --sysinit $DEVNULL}"
+SBCL_XC_HOST="${1:-sbcl --userinit $DEVNULL --sysinit $DEVNULL}"
 export DEVNULL
 export SBCL_XC_HOST
 echo //SBCL_XC_HOST=\"$SBCL_XC_HOST\"

src/code/array.lisp

@@ -349,11 +349,7 @@ of specialized arrays is supported."
                             (:little-endian
                              (- sb!vm:other-pointer-lowtag))
                             (:big-endian
-                             ;; I'm not completely sure of what this
-                             ;; 3 represents symbolically. It's
-                             ;; just what all the LOAD-TYPE vops
-                             ;; are doing.
-                             (- 3 sb!vm:other-pointer-lowtag)))))
+                             (- (1- n-word-bytes) sb!vm:other-pointer-lowtag)))))
                    ;; WIDETAG-OF needs extra code to handle
                    ;; LIST and FUNCTION lowtags. We're only
                    ;; dispatching on other pointers, so let's

src/compiler/hppa/macros.lisp

@@ -52,7 +52,7 @@
     (:little-endian
      `(inst ldb ,offset ,source ,target))
     (:big-endian
-     `(inst ldb (+ ,offset 3) ,source ,target))))
+     `(inst ldb (+ ,offset (1- n-word-bytes)) ,source ,target))))
 
 ;;; Macros to handle the fact that we cannot use the machine native call and
 ;;; return instructions.

src/compiler/mips/macros.lisp

@@ -70,7 +70,7 @@
       (:little-endian
        `(inst lbu ,n-target ,n-source ,n-offset))
       (:big-endian
-       `(inst lbu ,n-target ,n-source (+ ,n-offset 3))))))
+       `(inst lbu ,n-target ,n-source (+ ,n-offset (1- n-word-bytes)))))))
 
 
 ;;; Macros to handle the fact that we cannot use the machine native call and

src/compiler/ppc/macros.lisp

@@ -67,7 +67,7 @@
       (:little-endian
        `(inst lbz ,n-target ,n-source ,n-offset))
       (:big-endian
-       `(inst lbz ,n-target ,n-source (+ ,n-offset 3))))))
+       `(inst lbz ,n-target ,n-source (+ ,n-offset (1- n-word-bytes)))))))
 
 ;;; Macros to handle the fact that we cannot use the machine native call and
 ;;; return instructions.

src/compiler/sparc/macros.lisp

@@ -70,7 +70,7 @@
       (:little-endian
        `(inst ldub ,n-target ,n-source ,n-offset))
       (:big-endian
-       `(inst ldub ,n-target ,n-source (+ ,n-offset 3))))))
+       `(inst ldub ,n-target ,n-source (+ ,n-offset (1- n-word-bytes)))))))
 
 ;;; Macros to handle the fact that we cannot use the machine native call and
 ;;; return instructions.

src/compiler/x86-64/macros.lisp

@@ -125,7 +125,8 @@
               (make-ea :byte :base ,n-source :disp ,n-offset)))
       (:big-endian
        `(inst mov ,n-target
-              (make-ea :byte :base ,n-source :disp (+ ,n-offset 4)))))))
+              (make-ea :byte :base ,n-source
+                             :disp (+ ,n-offset (1- n-word-bytes))))))))
 
 ;;;; allocation helpers
 

src/compiler/x86/macros.lisp

@@ -160,7 +160,8 @@
               (make-ea :byte :base ,n-source :disp ,n-offset)))
       (:big-endian
        `(inst mov ,n-target
-              (make-ea :byte :base ,n-source :disp (+ ,n-offset 3)))))))
+              (make-ea :byte :base ,n-source
+                             :disp (+ ,n-offset (1- n-word-bytes))))))))
 
 ;;;; allocation helpers
 

version.lisp-expr

@@ -17,4 +17,4 @@
 ;;; checkins which aren't released. (And occasionally for internal
 ;;; versions, especially for internal versions off the main CVS
 ;;; branch, it gets hairier, e.g. "0.pre7.14.flaky4.13".)
-"1.0.5.52"
+"1.0.5.53"