0.7.7.24:

[sbcl.git] / src / code / alpha-vm.lisp

diff --git a/src/code/alpha-vm.lisp b/src/code/alpha-vm.lisp
index e9a1c54..343e746 100644 (file)
--- a/src/code/alpha-vm.lisp
+++ b/src/code/alpha-vm.lisp
@@ -102,7 +102,7 @@
 
 ;;; FIXME: Whether COERCE actually knows how to make a float out of a
 ;;; long is another question. This stuff still needs testing.
-(define-alien-routine ("os_context_fpregister_addr"
+(define-alien-routine ("os_context_float_register_addr"
                       context-float-register-addr)
   (* long)
   (context (* os-context-t))
@@ -115,27 +115,29 @@
   (setf (deref (context-float-register-addr context index))
         (coerce new format)))
 
+;;; This sets the software fp_control word, which is not the same
+;;; thing as the hardware fpcr.  We have to do this so that OS FPU
+;;; completion works properly
+
+;;; Note that this means we can't set rounding modes; we'd have to do
+;;; that separately.  That said, almost everybody seems to agree that
+;;; changing the rounding mode is rarely a good idea, because it upsets
+;;; libm functions.  So adding that is not a priority.  Sorry.
+;;; -dan 2001.02.06
+
+(define-alien-routine
+    ("arch_get_fp_control" floating-point-modes) (sb!alien:unsigned 64))
+
+(define-alien-routine
+    ("arch_set_fp_control" %floating-point-modes-setter) void (fp (sb!alien:unsigned 64)))
+
+(defun (setf floating-point-modes) (val) (%floating-point-modes-setter val))
+
 ;;; Given a signal context, return the floating point modes word in
 ;;; the same format as returned by FLOATING-POINT-MODES.
-(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)
+(define-alien-routine ("os_context_fp_control" context-floating-point-modes)
+    (sb!alien:unsigned 64) (context (* os-context-t)))
+
 \f
 ;;;; INTERNAL-ERROR-ARGS
 
@@ -161,27 +163,11 @@
                              vector (* n-word-bits 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)))))))
-\f
-;;; The loader uses this to convert alien names to the form they
-;;; occure in the symbol table (for example, prepending an
-;;; underscore). 
-(defun extern-alien-name (name)
-  (declare (type simple-base-string name))
-  ;; On the Alpha we don't do anything.
-  name)
-\f
-;;;; Do whatever is necessary to make the given code component
-;;;; executable.
-;;;;
-;;;; XXX do we really not have to flush caches or something here? I
-;;;; need an architecture manual
-(defun sanctify-for-execution (component)
-  (declare (ignore component))
-  nil)
+