print register names

1 files changed, 80 insertions, 5 deletions

diff --git a/SHARC/Types.hs b/SHARC/Types.hs
index d6c9eac..22f91a1 100644
--- a/SHARC/Types.hs
+++ b/SHARC/Types.hs
@@ -93,13 +93,16 @@ instance Show Cond where
 instance Show TermCond where
   show (TermCond n) = findWithDefault (printf "0x%02X" n) n termCodeMap
 
+-- TODO: see page 10-30 in programming reference for register opcodes
 
+-- TODO: Ireg is just a special case Ureg.  Unify types!
 data Ireg = Ireg Word8
 mkIreg :: Word8 -> Ireg
 mkIreg n = Ireg $ n .&. 0x07
 instance Show Ireg where
   show (Ireg n) = printf "I%d" n
 
+-- TODO: Mreg is just a special case Ureg.  Unify types!
 data Mreg = Mreg Word8
 mkMreg :: Word8 -> Mreg
 mkMreg n = Mreg $ n .&. 0x07
@@ -112,21 +115,93 @@ data Ureg = Ureg Word8
 mkUreg :: Word8 -> Ureg
 mkUreg n = Ureg $ n .&. 0xEF
 instance Show Ureg where
-  show (Ureg n) = printf "0x%02X" n
-
+  show (Ureg n) = case prefix of
+                   0x00 -> format0000 stripped
+                   0x10 -> format0001 stripped
+                   0x20 -> format0010 stripped
+                   0x30 -> format0011 stripped
+                   0x40 -> format0100 stripped
+                   0x50 -> format0101 stripped
+                   0x60 -> names0110 !! fromIntegral stripped
+                   _ -> printf "0x%02X" n
+    where
+      prefix = n .&. 0xF0
+      stripped = n .&. 0x0F
+      format0000 x = 'R' : show x -- TODO: depends on whether it's DREG or CDREG
+      format0001 x = 'I' : show x
+      format0010 x = 'M' : show x
+      format0011 x = 'L' : show x
+      format0100 x = 'B' : show x
+      format0101 x = 'S' : show x -- TODO: depends on whether it's DREG or CDREG
+      names0110 = [ "FADDR"  -- these are names for registers with prefix 0110
+                  , "DADDR"
+                  , ""
+                  , "PC"
+                  , "PCSTK"
+                  , "PCSTKP"
+                  , "LADDR"
+                  , "CURLCNTR"
+                  , "LCNTR"
+                  , "EMUCLK"
+                  , "EMUCLK2"
+                  , "PX"
+                  , "PX1"
+                  , "PX2"
+                  , "TPERIOD"
+                  , "TCOUNT"
+                  ]
+
+-- TODO: Sreg is just a special case Ureg.  Unify types!
 -- 4 bit system register
 data Sreg = Sreg Word8
 mkSreg :: Word8 -> Sreg
 mkSreg n = Sreg $ n .&. 0x0F
 instance Show Sreg where
-  show (Sreg n) = printf "0x%01X" n
-
+  show (Sreg n) = xnames !! fromIntegral n  -- TODO: distinguish between PEx and PEy names!
+    where xnames = [ "USTAT1"
+                   , "USTAT2"
+                   , "MODE1"
+                   , "MMASK"
+                   , "MODE2"
+                   , "FLAGS"
+                   , "ASTATx"
+                   , "ASTATy"
+                   , "STKYx"
+                   , "STKYy"
+                   , "IRPTL"
+                   , "IMASK"
+                   , "IMASKP"
+                   , "LRPTL"
+                   , "USTAT3"
+                   , "USTAT4"
+                   ]
+          ynames = [ "USTAT2"
+                   , "USTAT1"
+                   , "MODE1"
+                   , "MMASK"
+                   , "MODE2"
+                   , "FLAGS"
+                   , "ASTATy"
+                   , "ASTATx"
+                   , "STKYy"
+                   , "STKYx"
+                   , "IRPTL"
+                   , "IMASK"
+                   , "IMASKP"
+                   , "LRPTL"
+                   , "USTAT4"
+                   , "USTAT3"
+                   ]
+
+-- TODO: Dreg is just a special case Ureg.  Unify types!
 -- 4 bit data register
 data Dreg = Dreg Word8
 mkDreg :: Word8 -> Dreg
 mkDreg n = Dreg $ n .&. 0x0F
 instance Show Dreg where
-  show (Dreg n) = printf "R%d" n -- TODO: according to the docs this is R15-R0 *and* F15-F0
+  show (Dreg n) = printf "R%d" n
+                  -- TODO: according to the docs this is R15-R0 *and* F15-F0
+                  -- TODO: if this is a CDREG, it should be S, not R
 
 data Address24 = Address24 Word32    -- absolute 24 bit address
                | RelAddress24 Word32 -- relative 24 bit address