X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86%2Ftype-vops.lisp;h=0284ae4dd6726308b8a9c78d90946bbe1de71176;hb=13fb19c3183a0effb7c35a2d453d6c6c91726e26;hp=4b8cd454b9f01ee66040239bbac11dca20cfc0de;hpb=fd63d6aad4a5a3b171eafb56b1b6bd502e501281;p=sbcl.git

diff --git a/src/compiler/x86/type-vops.lisp b/src/compiler/x86/type-vops.lisp
index 4b8cd45..0284ae4 100644
--- a/src/compiler/x86/type-vops.lisp
+++ b/src/compiler/x86/type-vops.lisp
@@ -197,7 +197,7 @@
            `((define-vop (,check-name ,(intern (concatenate 'string prefix "CHECK-TYPE")))
                (:generator ,cost
                  (let ((err-lab
-                        (generate-error-code vop ,error-code value)))
+                        (generate-error-code vop ',error-code value)))
                    (test-type value err-lab t (,@type-codes))
                    (move result value))))))
        ,@(when ptype
@@ -207,11 +207,31 @@
 
 (define-vop (fixnump/unsigned-byte-32 simple-type-predicate)
   (:args (value :scs (unsigned-reg)))
+  (:info)
+  (:conditional :be)
   (:arg-types unsigned-num)
   (:translate fixnump)
   (:generator 5
-    (inst cmp value #.sb!xc:most-positive-fixnum)
-    (inst jmp (if not-p :a :be) target)))
+    ;; We could encode this with :Z and SHR, analogously to the signed-byte-32
+    ;; case below -- as we do on x86-64 -- but that costs us an extra
+    ;; register. Compromises...
+    (inst cmp value #.sb!xc:most-positive-fixnum)))
+
+(define-vop (fixnump/signed-byte-32 type-predicate)
+  (:args (value :scs (signed-reg)))
+  (:info)
+  (:conditional :z)
+  (:arg-types signed-num)
+  (:translate fixnump)
+  (:generator 5
+    ;; Hackers Delight, p. 53: signed
+    ;;    a <= x <= a + 2^n - 1
+    ;; is equivalent to unsigned
+    ;;    ((x-a) >> n) = 0
+    (inst mov eax-tn value)
+    (inst sub eax-tn #.sb!xc:most-negative-fixnum)
+    (inst shr eax-tn #.(integer-length (- sb!xc:most-positive-fixnum
+                                          sb!xc:most-negative-fixnum)))))
 
 ;;; A (SIGNED-BYTE 32) can be represented with either fixnum or a bignum with
 ;;; exactly one digit.
@@ -237,7 +257,7 @@
 (define-vop (check-signed-byte-32 check-type)
   (:generator 45
     (let ((nope (generate-error-code vop
-                                     object-not-signed-byte-32-error
+                                     'object-not-signed-byte-32-error
                                      value)))
       (generate-fixnum-test value)
       (inst jmp :e yep)
@@ -302,7 +322,7 @@
 (define-vop (check-unsigned-byte-32 check-type)
   (:generator 45
     (let ((nope
-           (generate-error-code vop object-not-unsigned-byte-32-error value))
+           (generate-error-code vop 'object-not-unsigned-byte-32-error value))
           (yep (gen-label))
           (fixnum (gen-label))
           (single-word (gen-label)))
@@ -359,7 +379,7 @@
 
 (define-vop (check-symbol check-type)
   (:generator 12
-    (let ((error (generate-error-code vop object-not-symbol-error value)))
+    (let ((error (generate-error-code vop 'object-not-symbol-error value)))
       (inst cmp value nil-value)
       (inst jmp :e drop-thru)
       (test-type value error t (symbol-header-widetag)))
@@ -377,7 +397,7 @@
 
 (define-vop (check-cons check-type)
   (:generator 8
-    (let ((error (generate-error-code vop object-not-cons-error value)))
+    (let ((error (generate-error-code vop 'object-not-cons-error value)))
       (inst cmp value nil-value)
       (inst jmp :e error)
       (test-type value error t (list-pointer-lowtag))