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-- | An architecture independent description of a register's class.
module RegClass
( RegClass (..) )
where
import Outputable
import Unique
-- | The class of a register.
-- Used in the register allocator.
-- We treat all registers in a class as being interchangable.
--
data RegClass
= RcInteger
| RcFloat
| RcDouble
| RcDoubleSSE -- x86 only: the SSE regs are a separate class
deriving Eq
instance Uniquable RegClass where
getUnique RcInteger = mkRegClassUnique 0
getUnique RcFloat = mkRegClassUnique 1
getUnique RcDouble = mkRegClassUnique 2
getUnique RcDoubleSSE = mkRegClassUnique 3
instance Outputable RegClass where
ppr RcInteger = Outputable.text "I"
ppr RcFloat = Outputable.text "F"
ppr RcDouble = Outputable.text "D"
ppr RcDoubleSSE = Outputable.text "S"
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