Steel Bank Common Lisp

Update of /cvsroot/sbcl/sbcl/src/compiler/sparc
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv16274/src/compiler/sparc

Modified Files:
	vm.lisp 
Log Message:
0.9.9.5:
	Reduce storage requirements for error trap information:
	... shuffle around ANY-REG and DESCRIPTOR-REG storage classes
	    to make their SC-NUMBERs small, which makes SC-OFFSETs smaller,
	    which cuts down the size of SC-OFFSETs in error trap
	    information from three bytes to one byte;
	... saves ~250KB in core files on PPC/OS X;
	... only applies to RISCy platforms, as x86oid SC-OFFSETs already
	    fit into a single byte due to having a smaller number of
	    registers.

	Bump the fasl file version, too.


Index: vm.lisp
===================================================================
RCS file: /cvsroot/sbcl/sbcl/src/compiler/sparc/vm.lisp,v
retrieving revision 1.11
retrieving revision 1.12
diff -u -d -r1.11 -r1.12
--- vm.lisp	14 Jul 2005 18:48:35 -0000	1.11
+++ vm.lisp	27 Jan 2006 15:53:19 -0000	1.12
@@ -150,6 +150,27 @@
   ;; The control stack.  (Scanned by GC)
   (control-stack control-stack)
 
+  ;; We put ANY-REG and DESCRIPTOR-REG early so that their SC-NUMBER
+  ;; is small and therefore the error trap information is smaller.
+  ;; Moving them up here from their previous place down below saves
+  ;; ~250K in core file size.  --njf, 2006-01-27
+
+  ;; Immediate descriptor objects.  Don't have to be seen by GC, but nothing
+  ;; bad will happen if they are.  (fixnums, characters, header values, etc).
+  (any-reg
+   registers
+   :locations #.(append non-descriptor-regs descriptor-regs)
+   :constant-scs (zero immediate)
+   :save-p t
+   :alternate-scs (control-stack))
+
+  ;; Pointer descriptor objects.  Must be seen by GC.
+  (descriptor-reg registers
+   :locations #.descriptor-regs
+   :constant-scs (constant null immediate)
+   :save-p t
+   :alternate-scs (control-stack))
+
   ;; The non-descriptor stacks.
   (signed-stack non-descriptor-stack) ; (signed-byte 32)
   (unsigned-stack non-descriptor-stack) ; (unsigned-byte 32)
@@ -171,22 +192,6 @@
 
   ;; **** Things that can go in the integer registers.
 
-  ;; Immediate descriptor objects.  Don't have to be seen by GC, but nothing
-  ;; bad will happen if they are.  (fixnums, characters, header values, etc).
-  (any-reg
-   registers
-   :locations #.(append non-descriptor-regs descriptor-regs)
-   :constant-scs (zero immediate)
-   :save-p t
-   :alternate-scs (control-stack))
-
-  ;; Pointer descriptor objects.  Must be seen by GC.
-  (descriptor-reg registers
-   :locations #.descriptor-regs
-   :constant-scs (constant null immediate)
-   :save-p t
-   :alternate-scs (control-stack))
-
   ;; Non-Descriptor characters
   (character-reg registers
    :locations #.non-descriptor-regs