;;; Given a signal context, return the floating point modes word in
;;; the same format as returned by FLOATING-POINT-MODES.
+
+;;; Under SunOS, we have a straightforward implementation in C:
+#!+sunos
+(define-alien-routine ("os_context_fp_control" context-floating-point-modes)
+ (sb!alien:unsigned 32)
+ (context (* os-context-t)))
+
+;;; Under Linux, we have to contend with utterly broken signal handling.
+#!+linux
(defun context-floating-point-modes (context)
- ;; FIXME: As of sbcl-0.6.7 and the big rewrite of signal handling for
- ;; POSIXness and (at the Lisp level) opaque signal contexts,
- ;; this is stubified. It needs to be rewritten as an
- ;; alien function.
(warn "stub CONTEXT-FLOATING-POINT-MODES")
- ;; old code for Linux:
- #+nil
- (let ((cw (slot (deref (slot context 'fpstate) 0) 'cw))
- (sw (slot (deref (slot context 'fpstate) 0) 'sw)))
- ;;(format t "cw = ~4X~%sw = ~4X~%" cw sw)
- ;; NOT TESTED -- Clear sticky bits to clear interrupt condition.
- (setf (slot (deref (slot context 'fpstate) 0) 'sw) (logandc2 sw #x3f))
- ;;(format t "new sw = ~X~%" (slot (deref (slot context 'fpstate) 0) 'sw))
- ;; Simulate floating-point-modes VOP.
- (logior (ash (logand sw #xffff) 16) (logxor (logand cw #xffff) #x3f)))
-
0)
\f
;;;; INTERNAL-ERROR-ARGS.
vector-data-offset)
(* length n-byte-bits))
(let* ((index 0)
- (error-number (sb!c::read-var-integer vector index)))
+ (error-number (sb!c:read-var-integer vector index)))
(collect ((sc-offsets))
(loop
(when (>= index length)
(return))
- (sc-offsets (sb!c::read-var-integer vector index)))
+ (sc-offsets (sb!c:read-var-integer vector index)))
(values error-number (sc-offsets))))))
(defun args-for-tagged-add-inst (context bad-inst)
#.(error-number-or-lose 'unknown-error)))
(list (sb!c::make-sc-offset descriptor-reg-sc-number reg)))))
-\f
-;;; Do whatever is necessary to make the given code component
-;;; executable. On the sparc, we don't need to do anything, because
-;;; the i and d caches are unified.
-(defun sanctify-for-execution (component)
- (declare (ignore component))
- nil)