X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=tests%2Farith.pure.lisp;h=624abd3124143cb98976ac0ecebc3bc281f05dac;hb=d3c56c291d4d4eff8c3ec234d5ed904fe5b55df4;hp=563f3695799ca6088d5c1c6c94566adfc9a4e162;hpb=6cc71ab8ffad49f43895ad0a1df6885c81876687;p=sbcl.git

diff --git a/tests/arith.pure.lisp b/tests/arith.pure.lisp
index 563f369..624abd3 100644
--- a/tests/arith.pure.lisp
+++ b/tests/arith.pure.lisp
@@ -69,17 +69,31 @@
 
 ;;; (CEILING x 2^k) was optimized incorrectly
 (loop for divisor in '(-4 4)
-   for ceiler = (compile nil `(lambda (x)
-                                (declare (fixnum x))
-                                (declare (optimize (speed 3)))
-                                (ceiling x ,divisor)))
-   do (loop for i from -5 to 5
-         for exact-q = (/ i divisor)
-         do (multiple-value-bind (q r)
-                (funcall ceiler i)
-              (assert (= (+ (* q divisor) r) i))
-              (assert (<= exact-q q))
-              (assert (< q (1+ exact-q))))))
+      for ceiler = (compile nil `(lambda (x)
+                                   (declare (fixnum x))
+                                   (declare (optimize (speed 3)))
+                                   (ceiling x ,divisor)))
+      do (loop for i from -5 to 5
+               for exact-q = (/ i divisor)
+               do (multiple-value-bind (q r)
+                      (funcall ceiler i)
+                    (assert (= (+ (* q divisor) r) i))
+                    (assert (<= exact-q q))
+                    (assert (< q (1+ exact-q))))))
+
+;;; (TRUNCATE x 2^k) was optimized incorrectly
+(loop for divisor in '(-4 4)
+      for truncater = (compile nil `(lambda (x)
+                                      (declare (fixnum x))
+                                      (declare (optimize (speed 3)))
+                                      (truncate x ,divisor)))
+      do (loop for i from -9 to 9
+               for exact-q = (/ i divisor)
+               do (multiple-value-bind (q r)
+                      (funcall truncater i)
+                    (assert (= (+ (* q divisor) r) i))
+                    (assert (<= (abs q) (abs exact-q)))
+                    (assert (< (abs exact-q) (1+ (abs q)))))))
 
 ;;; CEILING had a corner case, spotted by Paul Dietz
 (assert (= (ceiling most-negative-fixnum (1+ most-positive-fixnum)) -1))
@@ -92,7 +106,11 @@
   (let* ((x (random most-positive-fixnum))
 	 (x2 (* x 2))
 	 (x3 (* x 3)))
-    (let ((fn (handler-bind ((sb-ext:compiler-note #'error))
+    (let ((fn (handler-bind (;; broken by rearrangement of
+			     ;; multiplication strength reduction in
+			     ;; sbcl-0.8.4.12
+			     #+nil
+			     (sb-ext:compiler-note #'error))
 		(compile nil
 			 `(lambda (y)
 			    (declare (optimize speed) (type (integer 0 3) y))
@@ -137,3 +155,55 @@
 	     (65 (ash most-negative-fixnum 36) t)))
   (destructuring-bind (index int result) x
     (assert (eq (eval `(logbitp ,index ,int)) result))))
+
+;;; off-by-1 type inference error for %DPB and %DEPOSIT-FIELD:
+(let ((f (compile nil '(lambda (b)
+                        (integer-length (dpb b (byte 4 28) -1005))))))
+  (assert (= (funcall f 1230070) 32)))
+(let ((f (compile nil '(lambda (b)
+                        (integer-length (deposit-field b (byte 4 28) -1005))))))
+  (assert (= (funcall f 1230070) 32)))
+
+;;; type inference leading to an internal compiler error:
+(let ((f (compile nil '(lambda (x)
+			(declare (type fixnum x))
+			(ldb (byte 0 0) x)))))
+  (assert (= (funcall f 1) 0))
+  (assert (= (funcall f most-positive-fixnum) 0))
+  (assert (= (funcall f -1) 0)))
+
+;;; Alpha bignum arithmetic bug:
+(assert (= (* 966082078641 419216044685) 404997107848943140073085))
+
+;;; Alpha smallnum arithmetic bug:
+(assert (= (ash -129876 -1026) -1))
+
+;;; Alpha middlenum (yes, really! Affecting numbers between 2^32 and
+;;; 2^64 :) arithmetic bug
+(let ((fn (compile nil '(LAMBDA (A B C D)
+          (DECLARE (TYPE (INTEGER -1621 -513) A)
+                   (TYPE (INTEGER -3 34163) B)
+                   (TYPE (INTEGER -9485132993 81272960) C)
+                   (TYPE (INTEGER -255340814 519943) D)
+                   (IGNORABLE A B C D)
+                   (OPTIMIZE (SPEED 3) (SAFETY 1) (DEBUG 1)))
+          (TRUNCATE C (MIN -100 4149605))))))
+  (assert (= (funcall fn -1332 5864 -6963328729 -43789079) 69633287)))
+
+;;; Here's another fantastic Alpha backend bug: the code to load
+;;; immediate 64-bit constants into a register was wrong.
+(let ((fn (compile nil '(LAMBDA (A B C D)
+          (DECLARE (TYPE (INTEGER -3563 2733564) A)
+                   (TYPE (INTEGER -548947 7159) B)
+                   (TYPE (INTEGER -19 0) C)
+                   (TYPE (INTEGER -2546009 0) D)
+                   (IGNORABLE A B C D)
+                   (OPTIMIZE (SPEED 3) (SAFETY 1) (DEBUG 1)))
+          (CASE A
+            ((89 125 16) (ASH A (MIN 18 -706)))
+            (T (DPB -3 (BYTE 30 30) -1)))))))
+  (assert (= (funcall fn 1227072 -529823 -18 -792831) -2147483649)))
+
+;;; ASH of a negative bignum by a bignum count would erroneously
+;;; return 0 prior to sbcl-0.8.4.4
+(assert (= (ash (1- most-negative-fixnum) (1- most-negative-fixnum)) -1))