Add a anyset operation to HighOrdAlu, using foldl.

diff --git a/HighOrdAlu.hs b/HighOrdAlu.hs
index f49d5110c5673b0cca7d1164a80972b5a4028525..331fa1debd0b4f20a071b126398ee498b552967d 100644 (file)
--- a/HighOrdAlu.hs
+++ b/HighOrdAlu.hs
@@ -19,6 +19,15 @@ invop a b = map hwnot a
 andop :: Op n Bit
 andop a b = zipWith hwand a b
 
+-- Is any bit set?
+--anyset :: (PositiveT n) => Op n Bit
+anyset :: Op D4 Bit
+--anyset a b = copy undefined (a' `hwor` b')
+anyset a b = constant (a' `hwor` b') a b
+  where 
+    a' = foldl hwor Low a
+    b' = foldl hwor Low b
+
 type Op n e = (TFVec n e -> TFVec n e -> TFVec n e)
 type Opcode = Bit
 
@@ -30,4 +39,4 @@ alu op1 op2 opc a b =
 
 actual_alu :: Opcode -> TFVec D4 Bit -> TFVec D4 Bit -> TFVec D4 Bit
 --actual_alu = alu (constant Low) andop
-actual_alu = alu invop andop
+actual_alu = alu anyset andop