[project @ 2001-12-13 23:32:21 by sof]

shift wibble

diff --git a/ghc/compiler/nativeGen/MachMisc.lhs b/ghc/compiler/nativeGen/MachMisc.lhs
index 4229595..6b2c181 100644 (file)
--- a/ghc/compiler/nativeGen/MachMisc.lhs
+++ b/ghc/compiler/nativeGen/MachMisc.lhs
@@ -177,7 +177,13 @@ exactLog2 x
        }
   where
     pow2 x# | x# ==# 1# = 0#
-            | otherwise = 1# +# pow2 (w2i (i2w x# `shiftRL#` 1#))
+            | otherwise = 1# +# pow2 (w2i (i2w x# `shiftr` 1#))
+
+#if __GLASGOW_HASKELL__ >= 503
+    shiftr x y = uncheckedShiftRL# x y
+#else
+    shiftr x y = shiftRL# x y
+#endif
 \end{code}
 
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