-- -----------------------------------------------------------------------------
module PPC.Regs (
- -- sizes
- Size(..),
- intSize,
- floatSize,
- isFloatSize,
- wordSize,
- cmmTypeSize,
- sizeToWidth,
- mkVReg,
-
-- immediates
Imm(..),
strImmLit,
-- horrow show
freeReg,
- globalRegMaybe
+ globalRegMaybe,
+ get_GlobalReg_reg_or_addr,
+ allocatableRegs
+
)
where
#include "HsVersions.h"
#include "../includes/MachRegs.h"
-import RegsBase
+import Reg
+import RegClass
+import CgUtils ( get_GlobalReg_addr )
import BlockId
import Cmm
import CLabel ( CLabel )
import Pretty
import Outputable ( Outputable(..), pprPanic, panic )
import qualified Outputable
-import Unique
import Constants
import FastBool
import Data.Word ( Word8, Word16, Word32 )
import Data.Int ( Int8, Int16, Int32 )
--- sizes -----------------------------------------------------------------------
--- For these three, the "size" also gives the int/float
--- distinction, because the instructions for int/float
--- differ only in their suffices
-data Size
- = II8 | II16 | II32 | II64 | FF32 | FF64 | FF80
- deriving Eq
-
-intSize, floatSize :: Width -> Size
-intSize W8 = II8
-intSize W16 = II16
-intSize W32 = II32
-intSize W64 = II64
-intSize other = pprPanic "MachInstrs.intSize" (ppr other)
-
-floatSize W32 = FF32
-floatSize W64 = FF64
-floatSize other = pprPanic "MachInstrs.intSize" (ppr other)
-
-
-isFloatSize :: Size -> Bool
-isFloatSize FF32 = True
-isFloatSize FF64 = True
-isFloatSize FF80 = True
-isFloatSize _ = False
-
-
-wordSize :: Size
-wordSize = intSize wordWidth
-
-
-cmmTypeSize :: CmmType -> Size
-cmmTypeSize ty
- | isFloatType ty = floatSize (typeWidth ty)
- | otherwise = intSize (typeWidth ty)
-
-
-sizeToWidth :: Size -> Width
-sizeToWidth II8 = W8
-sizeToWidth II16 = W16
-sizeToWidth II32 = W32
-sizeToWidth II64 = W64
-sizeToWidth FF32 = W32
-sizeToWidth FF64 = W64
-sizeToWidth _ = panic "MachInstrs.sizeToWidth"
-
-
-mkVReg :: Unique -> Size -> Reg
-mkVReg u size
- | not (isFloatSize size) = VirtualRegI u
- | otherwise
- = case size of
- FF32 -> VirtualRegD u
- FF64 -> VirtualRegD u
- _ -> panic "mkVReg"
-
-
-- immediates ------------------------------------------------------------------
data Imm
-- Dunno about Alpha.
argRegs :: RegNo -> [Reg]
argRegs 0 = []
-argRegs 1 = map RealReg [3]
-argRegs 2 = map RealReg [3,4]
-argRegs 3 = map RealReg [3..5]
-argRegs 4 = map RealReg [3..6]
-argRegs 5 = map RealReg [3..7]
-argRegs 6 = map RealReg [3..8]
-argRegs 7 = map RealReg [3..9]
-argRegs 8 = map RealReg [3..10]
+argRegs 1 = map regSingle [3]
+argRegs 2 = map regSingle [3,4]
+argRegs 3 = map regSingle [3..5]
+argRegs 4 = map regSingle [3..6]
+argRegs 5 = map regSingle [3..7]
+argRegs 6 = map regSingle [3..8]
+argRegs 7 = map regSingle [3..9]
+argRegs 8 = map regSingle [3..10]
argRegs _ = panic "MachRegs.argRegs(powerpc): don't know about >8 arguments!"
allArgRegs :: [Reg]
-allArgRegs = map RealReg [3..10]
+allArgRegs = map regSingle [3..10]
-- these are the regs which we cannot assume stay alive over a C call.
callClobberedRegs :: [Reg]
#if defined(darwin_TARGET_OS)
callClobberedRegs
- = map RealReg (0:[2..12] ++ map fReg [0..13])
+ = map regSingle (0:[2..12] ++ map fReg [0..13])
#elif defined(linux_TARGET_OS)
callClobberedRegs
- = map RealReg (0:[2..13] ++ map fReg [0..13])
+ = map regSingle (0:[2..13] ++ map fReg [0..13])
#else
callClobberedRegs
{-# INLINE regClass #-}
regClass :: Reg -> RegClass
-regClass (VirtualRegI _) = RcInteger
-regClass (VirtualRegHi _) = RcInteger
-regClass (VirtualRegF u) = pprPanic ("regClass(ppc):VirtualRegF ") (ppr u)
-regClass (VirtualRegD _) = RcDouble
-regClass (RealReg i)
+regClass (RegVirtual (VirtualRegI _)) = RcInteger
+regClass (RegVirtual (VirtualRegHi _)) = RcInteger
+regClass (RegVirtual (VirtualRegF u)) = pprPanic ("regClass(ppc):VirtualRegF ") (ppr u)
+regClass (RegVirtual (VirtualRegD _)) = RcDouble
+
+regClass (RegReal (RealRegSingle i))
| i < 32 = RcInteger
| otherwise = RcDouble
+regClass (RegReal (RealRegPair{}))
+ = panic "regClass(ppr): no reg pairs on this architecture"
showReg :: RegNo -> String
showReg n
allFPArgRegs :: [Reg]
#if defined(darwin_TARGET_OS)
-allFPArgRegs = map (RealReg . fReg) [1..13]
+allFPArgRegs = map (regSingle . fReg) [1..13]
#elif defined(linux_TARGET_OS)
-allFPArgRegs = map (RealReg . fReg) [1..8]
+allFPArgRegs = map (regSingle . fReg) [1..8]
#else
allFPArgRegs = panic "PPC.Regs.allFPArgRegs: not defined for this architecture"
fReg x = (32 + x)
sp, r3, r4, r27, r28, f1, f20, f21 :: Reg
-sp = RealReg 1
-r3 = RealReg 3
-r4 = RealReg 4
-r27 = RealReg 27
-r28 = RealReg 28
-f1 = RealReg $ fReg 1
-f20 = RealReg $ fReg 20
-f21 = RealReg $ fReg 21
+sp = regSingle 1
+r3 = regSingle 3
+r4 = regSingle 4
+r27 = regSingle 27
+r28 = regSingle 28
+f1 = regSingle $ fReg 1
+f20 = regSingle $ fReg 20
+f21 = regSingle $ fReg 21
#ifdef REG_HpLim
freeReg REG_HpLim = fastBool False
#endif
-freeReg n = fastBool True
+freeReg _ = fastBool True
-- | Returns 'Nothing' if this global register is not stored
#ifdef REG_Base
-globalRegMaybe BaseReg = Just (RealReg REG_Base)
+globalRegMaybe BaseReg = Just (regSingle REG_Base)
#endif
#ifdef REG_R1
-globalRegMaybe (VanillaReg 1 _) = Just (RealReg REG_R1)
+globalRegMaybe (VanillaReg 1 _) = Just (regSingle REG_R1)
#endif
#ifdef REG_R2
-globalRegMaybe (VanillaReg 2 _) = Just (RealReg REG_R2)
+globalRegMaybe (VanillaReg 2 _) = Just (regSingle REG_R2)
#endif
#ifdef REG_R3
-globalRegMaybe (VanillaReg 3 _) = Just (RealReg REG_R3)
+globalRegMaybe (VanillaReg 3 _) = Just (regSingle REG_R3)
#endif
#ifdef REG_R4
-globalRegMaybe (VanillaReg 4 _) = Just (RealReg REG_R4)
+globalRegMaybe (VanillaReg 4 _) = Just (regSingle REG_R4)
#endif
#ifdef REG_R5
-globalRegMaybe (VanillaReg 5 _) = Just (RealReg REG_R5)
+globalRegMaybe (VanillaReg 5 _) = Just (regSingle REG_R5)
#endif
#ifdef REG_R6
-globalRegMaybe (VanillaReg 6 _) = Just (RealReg REG_R6)
+globalRegMaybe (VanillaReg 6 _) = Just (regSingle REG_R6)
#endif
#ifdef REG_R7
-globalRegMaybe (VanillaReg 7 _) = Just (RealReg REG_R7)
+globalRegMaybe (VanillaReg 7 _) = Just (regSingle REG_R7)
#endif
#ifdef REG_R8
-globalRegMaybe (VanillaReg 8 _) = Just (RealReg REG_R8)
+globalRegMaybe (VanillaReg 8 _) = Just (regSingle REG_R8)
#endif
#ifdef REG_R9
-globalRegMaybe (VanillaReg 9 _) = Just (RealReg REG_R9)
+globalRegMaybe (VanillaReg 9 _) = Just (regSingle REG_R9)
#endif
#ifdef REG_R10
-globalRegMaybe (VanillaReg 10 _) = Just (RealReg REG_R10)
+globalRegMaybe (VanillaReg 10 _) = Just (regSingle REG_R10)
#endif
#ifdef REG_F1
-globalRegMaybe (FloatReg 1) = Just (RealReg REG_F1)
+globalRegMaybe (FloatReg 1) = Just (regSingle REG_F1)
#endif
#ifdef REG_F2
-globalRegMaybe (FloatReg 2) = Just (RealReg REG_F2)
+globalRegMaybe (FloatReg 2) = Just (regSingle REG_F2)
#endif
#ifdef REG_F3
-globalRegMaybe (FloatReg 3) = Just (RealReg REG_F3)
+globalRegMaybe (FloatReg 3) = Just (regSingle REG_F3)
#endif
#ifdef REG_F4
-globalRegMaybe (FloatReg 4) = Just (RealReg REG_F4)
+globalRegMaybe (FloatReg 4) = Just (regSingle REG_F4)
#endif
#ifdef REG_D1
-globalRegMaybe (DoubleReg 1) = Just (RealReg REG_D1)
+globalRegMaybe (DoubleReg 1) = Just (regSingle REG_D1)
#endif
#ifdef REG_D2
-globalRegMaybe (DoubleReg 2) = Just (RealReg REG_D2)
+globalRegMaybe (DoubleReg 2) = Just (regSingle REG_D2)
#endif
#ifdef REG_Sp
-globalRegMaybe Sp = Just (RealReg REG_Sp)
+globalRegMaybe Sp = Just (regSingle REG_Sp)
#endif
#ifdef REG_Lng1
-globalRegMaybe (LongReg 1) = Just (RealReg REG_Lng1)
+globalRegMaybe (LongReg 1) = Just (regSingle REG_Lng1)
#endif
#ifdef REG_Lng2
-globalRegMaybe (LongReg 2) = Just (RealReg REG_Lng2)
+globalRegMaybe (LongReg 2) = Just (regSingle REG_Lng2)
#endif
#ifdef REG_SpLim
-globalRegMaybe SpLim = Just (RealReg REG_SpLim)
+globalRegMaybe SpLim = Just (regSingle REG_SpLim)
#endif
#ifdef REG_Hp
-globalRegMaybe Hp = Just (RealReg REG_Hp)
+globalRegMaybe Hp = Just (regSingle REG_Hp)
#endif
#ifdef REG_HpLim
-globalRegMaybe HpLim = Just (RealReg REG_HpLim)
+globalRegMaybe HpLim = Just (regSingle REG_HpLim)
#endif
#ifdef REG_CurrentTSO
-globalRegMaybe CurrentTSO = Just (RealReg REG_CurrentTSO)
+globalRegMaybe CurrentTSO = Just (regSingle REG_CurrentTSO)
#endif
#ifdef REG_CurrentNursery
-globalRegMaybe CurrentNursery = Just (RealReg REG_CurrentNursery)
+globalRegMaybe CurrentNursery = Just (regSingle REG_CurrentNursery)
#endif
globalRegMaybe _ = Nothing
globalRegMaybe _ = panic "PPC.Regs.globalRegMaybe: not defined"
#endif /* powerpc_TARGET_ARCH */
+
+
+-- We map STG registers onto appropriate CmmExprs. Either they map
+-- to real machine registers or stored as offsets from BaseReg. Given
+-- a GlobalReg, get_GlobalReg_reg_or_addr produces either the real
+-- register it is in, on this platform, or a CmmExpr denoting the
+-- address in the register table holding it.
+-- (See also get_GlobalReg_addr in CgUtils.)
+
+get_GlobalReg_reg_or_addr :: GlobalReg -> Either Reg CmmExpr
+get_GlobalReg_reg_or_addr mid
+ = case globalRegMaybe mid of
+ Just rr -> Left rr
+ Nothing -> Right (get_GlobalReg_addr mid)
+
+
+-- allocatableRegs is allMachRegNos with the fixed-use regs removed.
+-- i.e., these are the regs for which we are prepared to allow the
+-- register allocator to attempt to map VRegs to.
+allocatableRegs :: [RegNo]
+allocatableRegs
+ = let isFree i = isFastTrue (freeReg i)
+ in filter isFree allMachRegNos
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