0.7.6.10:

[sbcl.git] / src / compiler / ppc / parms.lisp

diff --git a/src/compiler/ppc/parms.lisp b/src/compiler/ppc/parms.lisp
index 5b87bcc..088d178 100644 (file)
--- a/src/compiler/ppc/parms.lisp
+++ b/src/compiler/ppc/parms.lisp
@@ -54,10 +54,23 @@
 (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
 
@@ -143,25 +156,24 @@
 
     ;; 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
+    ;; functions that the C code needs to call
     sb!impl::maybe-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
+    ;; interrupt handling
     *free-interrupt-context-index*
     sb!unix::*interrupts-enabled*
     sb!unix::*interrupt-pending*