LOGBITP and LOGTEST optimizations from x86.

[sbcl.git] / src / compiler / alpha / system.lisp

diff --git a/src/compiler/alpha/system.lisp b/src/compiler/alpha/system.lisp
index 70c7c47..23e74b1 100644 (file)
--- a/src/compiler/alpha/system.lisp
+++ b/src/compiler/alpha/system.lisp
@@ -116,7 +116,7 @@
     (inst and t1 widetag-mask t1)
     (sc-case data
       (any-reg
-       (inst sll data (- n-widetag-bits 2) t2)
+       (inst sll data (- n-widetag-bits n-fixnum-tag-bits) t2)
        (inst bis t1 t2 t1))
       (immediate
        (let ((c (ash (tn-value data) n-widetag-bits)))
@@ -129,32 +129,17 @@
     (storew t1 x 0 other-pointer-lowtag)
     (move x res)))
 
-(define-vop (make-fixnum)
+(define-vop (pointer-hash)
+  (:translate pointer-hash)
   (:args (ptr :scs (any-reg descriptor-reg)))
   (:results (res :scs (any-reg descriptor-reg)))
+  (:policy :fast-safe)
   (:generator 1
-    ;;
-    ;; Some code (the hash table code) depends on this returning a
-    ;; positive number so make sure it does.
+    ;; FIXME: It would be better if this would mask the lowtag,
+    ;; and shift the result into a positive fixnum like on x86.
     (inst sll ptr 35 res)
     (inst srl res 33 res)))
 
-(define-vop (make-other-immediate-type)
-  (:args (val :scs (any-reg descriptor-reg))
-         (type :scs (any-reg descriptor-reg immediate)
-               :target temp))
-  (:results (res :scs (any-reg descriptor-reg)))
-  (:temporary (:scs (non-descriptor-reg)) temp)
-  (:generator 2
-    (sc-case type
-      ((immediate)
-       (inst sll val n-widetag-bits temp)
-       (inst bis temp (tn-value type) res))
-      (t
-       (inst sra type n-fixnum-tag-bits temp)
-       (inst sll val (- n-widetag-bits n-fixnum-tag-bits) res)
-       (inst bis res temp res)))))
-
 \f
 ;;;; allocation
 
@@ -244,3 +229,9 @@
       (inst ldl count offset count-vector)
       (inst addq count 1 count)
       (inst stl count offset count-vector))))
+
+;;;; Dummy definition for a spin-loop hint VOP
+(define-vop (spin-loop-hint)
+  (:translate spin-loop-hint)
+  (:policy :fast-safe)
+  (:generator 0))