X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fppc%2Fparms.lisp;h=4e05dd7edb8314705c4c418c74c32e1e39937a72;hb=4ed3f0d08c3a57a6762018d9622f253ab9d0f2b6;hp=5b87bcc74b1df470d6c047576f8ec412c4e2d2b4;hpb=db0691b05cc99ce010ecae78bb532b594aea1859;p=sbcl.git

diff --git a/src/compiler/ppc/parms.lisp b/src/compiler/ppc/parms.lisp
index 5b87bcc..4e05dd7 100644
--- a/src/compiler/ppc/parms.lisp
+++ b/src/compiler/ppc/parms.lisp
@@ -2,12 +2,24 @@
 ;;;; attributes for the PPC.  This file is separate from other stuff so 
 ;;;; that it can be compiled and loaded earlier. 
 
+;;;; 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")
 
 (def!constant n-word-bits 32
   "Number of bits per word where a word holds one lisp descriptor.")
 
+;;; the natural width of a machine word (as seen in e.g. register width,
+;;; address space)
+(def!constant n-machine-word-bits 32)
+
 (def!constant n-byte-bits 8
   "Number of bits per byte where a byte is the smallest addressable object.")
 
@@ -54,10 +66,23 @@
 (def!constant float-round-to-positive 2)
 (def!constant float-round-to-negative 3)
 
-(defconstant-eqx float-rounding-mode (byte 2 0) #'equalp)	  ; RD 
-(defconstant-eqx float-sticky-bits (byte 10 19) #'equalp)
-(defconstant-eqx float-traps-byte (byte 6 3) #'equalp)
-(defconstant-eqx float-exceptions-byte (byte 5 0) #'equalp)	  ; cexc
+(defconstant-eqx float-rounding-mode (byte 2 0) #'equalp)	  ; RD
+;;; FIXME I: Beware, all ye who trespass here. Despite its name,
+;;; FLOAT-STICKY-BITS is not the byte specifier for sticky bits in the
+;;; floating point control word. It is more like "accrued exceptions"
+;;; where FLOAT-EXCEPTIONS-BYTE is "current exceptions". Consequently,
+;;; on architectures where there is no "current exceptions"
+;;; FLOAT-EXCEPTIONS-BYTE and FLOAT-STICKY-BITS had better be the
+;;; same. 
+;;;
+;;; FIXME II: So, I've now documented this in comments in the PowerPC
+;;; tree. This may not make it easy to find for when new architectures
+;;; get backends written...
+;;;
+;;; CSR, 2002-06-11
+(defconstant-eqx float-sticky-bits (byte 5 25) #'equalp)
+(defconstant-eqx float-traps-byte (byte 5 3) #'equalp)
+(defconstant-eqx float-exceptions-byte (byte 5 25) #'equalp)	  ; cexc
 
 (def!constant float-fast-bit 2)		; Non-IEEE mode
 
@@ -66,26 +91,19 @@
 ;;;
 ;;; The number of bytes reserved above the number stack pointer.  These
 ;;; slots are required by architecture, mostly (?) to make C backtrace
-;;; work.
+;;; work. This must be a power of 2 - see BYTES-REQUIRED-FOR-NUMBER-STACK.
 ;;; 
 (def!constant number-stack-displacement
-  (* 2 sb!vm:n-word-bytes))
-
+  (* #!-darwin 2
+     #!+darwin 8
+     n-word-bytes))
 
 
-
 ;;; Where to put the different spaces.
-;;; 
 
 (def!constant read-only-space-start #x01000000)
 (def!constant read-only-space-end   #x04ff8000)
 
-(def!constant binding-stack-start   #x06000000)
-(def!constant binding-stack-end     #x06ff0000)
-
-(def!constant control-stack-start   #x07000000)
-(def!constant control-stack-end     #x07ff0000)
-
 (def!constant static-space-start    #x08000000)
 (def!constant static-space-end      #x097fff00)
 
@@ -143,30 +161,33 @@
 
     ;; The C startup code must fill these in.
     *posix-argv*
-    sb!impl::*initial-fdefn-objects*
 
-    ;; Functions that the C code needs to call
-    ;; sb!impl::%initial-fun
-    sb!impl::maybe-gc
+    ;; functions that the C code needs to call
+    sb!impl::sub-gc
     sb!kernel::internal-error
+    sb!kernel::control-stack-exhausted-error
     sb!di::handle-breakpoint
     sb!impl::fdefinition-object
 
-    ;; Free Pointers.
+    ;; free pointers
     *read-only-space-free-pointer*
     *static-space-free-pointer*
     *initial-dynamic-space-free-pointer*
 
-    ;; Things needed for non-local-exit.
+    ;; things needed for non-local exit
     *current-catch-block*
     *current-unwind-protect-block*
 
-    ;; Interrupt Handling
+    *binding-stack-start*
+    *control-stack-start*
+    *control-stack-end*
+
+    ;; interrupt handling
     *free-interrupt-context-index*
     sb!unix::*interrupts-enabled*
     sb!unix::*interrupt-pending*
 
-    #|sb!kernel::*current-thread*|#
+
     ))
 
 (defparameter *static-funs*
@@ -186,6 +207,7 @@
     sb!kernel:two-arg-and
     sb!kernel:two-arg-ior
     sb!kernel:two-arg-xor
+    sb!kernel:two-arg-eqv
     sb!kernel:two-arg-gcd
     sb!kernel:two-arg-lcm))