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module GHC.CmmToAsm.SPARC.CodeGen.Amode (
getAmode
)
where
import GHC.Prelude
import {-# SOURCE #-} GHC.CmmToAsm.SPARC.CodeGen.Gen32
import GHC.CmmToAsm.SPARC.CodeGen.Base
import GHC.CmmToAsm.SPARC.AddrMode
import GHC.CmmToAsm.SPARC.Imm
import GHC.CmmToAsm.SPARC.Instr
import GHC.CmmToAsm.SPARC.Regs
import GHC.CmmToAsm.SPARC.Base
import GHC.CmmToAsm.Monad
import GHC.CmmToAsm.Format
import GHC.Cmm
import GHC.Data.OrdList
-- | Generate code to reference a memory address.
getAmode
:: CmmExpr -- ^ expr producing an address
-> NatM Amode
getAmode tree@(CmmRegOff _ _)
= do platform <- getPlatform
getAmode (mangleIndexTree platform tree)
getAmode (CmmMachOp (MO_Sub _) [x, CmmLit (CmmInt i _)])
| fits13Bits (-i)
= do
(reg, code) <- getSomeReg x
let
off = ImmInt (-(fromInteger i))
return (Amode (AddrRegImm reg off) code)
getAmode (CmmMachOp (MO_Add _) [x, CmmLit (CmmInt i _)])
| fits13Bits i
= do
(reg, code) <- getSomeReg x
let
off = ImmInt (fromInteger i)
return (Amode (AddrRegImm reg off) code)
getAmode (CmmMachOp (MO_Add _) [x, y])
= do
(regX, codeX) <- getSomeReg x
(regY, codeY) <- getSomeReg y
let
code = codeX `appOL` codeY
return (Amode (AddrRegReg regX regY) code)
getAmode (CmmLit lit)
= do
let imm__2 = litToImm lit
tmp1 <- getNewRegNat II32
tmp2 <- getNewRegNat II32
let code = toOL [ SETHI (HI imm__2) tmp1
, OR False tmp1 (RIImm (LO imm__2)) tmp2]
return (Amode (AddrRegReg tmp2 g0) code)
getAmode other
= do
(reg, code) <- getSomeReg other
let
off = ImmInt 0
return (Amode (AddrRegImm reg off) code)
|
