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|
{-# OPTIONS -fno-warn-tabs #-}
-- The above warning supression flag is a temporary kludge.
-- While working on this module you are encouraged to remove it and
-- detab the module (please do the detabbing in a separate patch). See
-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#TabsvsSpaces
-- for details
module SPARC.CodeGen.CondCode (
getCondCode,
condIntCode,
condFltCode
)
where
import {-# SOURCE #-} SPARC.CodeGen.Gen32
import SPARC.CodeGen.Base
import SPARC.Instr
import SPARC.Regs
import SPARC.Cond
import SPARC.Imm
import SPARC.Base
import NCGMonad
import Size
import OldCmm
import DynFlags
import OrdList
import Outputable
getCondCode :: CmmExpr -> NatM CondCode
getCondCode (CmmMachOp mop [x, y])
=
case mop of
MO_F_Eq W32 -> condFltCode EQQ x y
MO_F_Ne W32 -> condFltCode NE x y
MO_F_Gt W32 -> condFltCode GTT x y
MO_F_Ge W32 -> condFltCode GE x y
MO_F_Lt W32 -> condFltCode LTT x y
MO_F_Le W32 -> condFltCode LE x y
MO_F_Eq W64 -> condFltCode EQQ x y
MO_F_Ne W64 -> condFltCode NE x y
MO_F_Gt W64 -> condFltCode GTT x y
MO_F_Ge W64 -> condFltCode GE x y
MO_F_Lt W64 -> condFltCode LTT x y
MO_F_Le W64 -> condFltCode LE x y
MO_Eq _ -> condIntCode EQQ x y
MO_Ne _ -> condIntCode NE x y
MO_S_Gt _ -> condIntCode GTT x y
MO_S_Ge _ -> condIntCode GE x y
MO_S_Lt _ -> condIntCode LTT x y
MO_S_Le _ -> condIntCode LE x y
MO_U_Gt _ -> condIntCode GU x y
MO_U_Ge _ -> condIntCode GEU x y
MO_U_Lt _ -> condIntCode LU x y
MO_U_Le _ -> condIntCode LEU x y
_ -> do dflags <- getDynFlagsNat
pprPanic "SPARC.CodeGen.CondCode.getCondCode" (pprPlatform (targetPlatform dflags) (CmmMachOp mop [x,y]))
getCondCode other = do dflags <- getDynFlagsNat
pprPanic "SPARC.CodeGen.CondCode.getCondCode" (pprPlatform (targetPlatform dflags) other)
-- @cond(Int|Flt)Code@: Turn a boolean expression into a condition, to be
-- passed back up the tree.
condIntCode :: Cond -> CmmExpr -> CmmExpr -> NatM CondCode
condIntCode cond x (CmmLit (CmmInt y _))
| fits13Bits y
= do
(src1, code) <- getSomeReg x
let
src2 = ImmInt (fromInteger y)
code' = code `snocOL` SUB False True src1 (RIImm src2) g0
return (CondCode False cond code')
condIntCode cond x y = do
(src1, code1) <- getSomeReg x
(src2, code2) <- getSomeReg y
let
code__2 = code1 `appOL` code2 `snocOL`
SUB False True src1 (RIReg src2) g0
return (CondCode False cond code__2)
condFltCode :: Cond -> CmmExpr -> CmmExpr -> NatM CondCode
condFltCode cond x y = do
(src1, code1) <- getSomeReg x
(src2, code2) <- getSomeReg y
tmp <- getNewRegNat FF64
let
promote x = FxTOy FF32 FF64 x tmp
pk1 = cmmExprType x
pk2 = cmmExprType y
code__2 =
if pk1 `cmmEqType` pk2 then
code1 `appOL` code2 `snocOL`
FCMP True (cmmTypeSize pk1) src1 src2
else if typeWidth pk1 == W32 then
code1 `snocOL` promote src1 `appOL` code2 `snocOL`
FCMP True FF64 tmp src2
else
code1 `appOL` code2 `snocOL` promote src2 `snocOL`
FCMP True FF64 src1 tmp
return (CondCode True cond code__2)
|
