+++ /dev/null
--- -----------------------------------------------------------------------------
---
--- (c) The University of Glasgow 1994-2004
---
--- Machine-specific info about registers.
---
--- Also includes stuff about immediate operands, which are
--- often/usually quite entangled with registers.
---
--- (Immediates could be untangled from registers at some cost in tangled
--- modules --- the pleasure has been foregone.)
---
--- -----------------------------------------------------------------------------
-
-\begin{code}
-{-# OPTIONS -w #-}
--- The above warning supression flag is a temporary kludge.
--- While working on this module you are encouraged to remove it and fix
--- any warnings in the module. See
--- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
--- for details
-
-#include "nativeGen/NCG.h"
-
-module MachRegs (
-
- -- * Sizes
- Size(..), intSize, floatSize, isFloatSize,
- wordSize, cmmTypeSize, sizeToWidth,
-
- -- * Immediate values
- Imm(..), strImmLit, litToImm,
-
- -- * Addressing modes
- AddrMode(..),
- addrOffset,
-
- -- * The 'Reg' type
- RegNo,
- Reg(..), isRealReg, isVirtualReg, renameVirtualReg,
- RegClass(..), regClass,
- trivColorable,
- getHiVRegFromLo,
- mkVReg,
-
- -- * Global registers
- get_GlobalReg_reg_or_addr,
-
- -- * Machine-dependent register-related stuff
- allocatableRegs, argRegs, allArgRegs, callClobberedRegs,
- allocatableRegsInClass,
- freeReg,
- spRel,
-
-#if alpha_TARGET_ARCH
- fits8Bits,
- fReg,
- gp, pv, ra, sp, t9, t10, t11, t12, v0, f0, zeroh,
-#endif
-#if i386_TARGET_ARCH
- EABase(..), EAIndex(..),
- eax, ebx, ecx, edx, esi, edi, ebp, esp,
- fake0, fake1, fake2, fake3, fake4, fake5,
- addrModeRegs,
-#endif
-#if x86_64_TARGET_ARCH
- EABase(..), EAIndex(..), ripRel,
- rax, rbx, rcx, rdx, rsi, rdi, rbp, rsp,
- eax, ebx, ecx, edx, esi, edi, ebp, esp,
- r8, r9, r10, r11, r12, r13, r14, r15,
- xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7,
- xmm8, xmm9, xmm10, xmm11, xmm12, xmm13, xmm14, xmm15,
- xmm,
- addrModeRegs, allFPArgRegs,
-#endif
-#if sparc_TARGET_ARCH
- fits13Bits,
- fpRel, gReg, iReg, lReg, oReg, fReg, largeOffsetError,
- fp, sp, g0, g1, g2, o0, o1, f0, f6, f8, f26, f27,
-#endif
-#if powerpc_TARGET_ARCH
- allFPArgRegs,
- makeImmediate,
- sp,
- r3, r4, r27, r28,
- f1, f20, f21,
-#endif
- ) where
-
-#include "HsVersions.h"
-
-#if i386_TARGET_ARCH
-# define STOLEN_X86_REGS 4
--- HACK: go for the max
-#endif
-
-#include "../includes/MachRegs.h"
-
-import BlockId
-import Cmm
-import CgUtils ( get_GlobalReg_addr )
-import CLabel ( CLabel, mkMainCapabilityLabel )
-import Pretty
-import Outputable ( Outputable(..), pprPanic, panic )
-import qualified Outputable
-import Unique
-import UniqSet
-import Constants
-import FastTypes
-import FastBool
-import UniqFM
-
-#if powerpc_TARGET_ARCH
-import Data.Word ( Word8, Word16, Word32 )
-import Data.Int ( Int8, Int16, Int32 )
-#endif
-
--- -----------------------------------------------------------------------------
--- Sizes on this architecture
---
--- A Size is usually a combination of width and class
-
--- It looks very like the old MachRep, but it's now of purely local
--- significance, here in the native code generator. You can change it
--- without global consequences.
---
--- A major use is as an opcode qualifier; thus the opcode
--- mov.l a b
--- might be encoded
--- MOV II32 a b
--- where the Size field encodes the ".l" part.
-
--- ToDo: it's not clear to me that we need separate signed-vs-unsigned sizes
--- here. I've removed them from the x86 version, we'll see what happens --SDM
-
--- ToDo: quite a few occurrences of Size could usefully be replaced by Width
-
-#if powerpc_TARGET_ARCH || i386_TARGET_ARCH || x86_64_TARGET_ARCH
-data Size -- For these three, the "size" also gives the int/float
- -- distinction, because the instructions for int/float
- -- differ only in their suffices
- = 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)
-
-wordSize :: Size
-wordSize = intSize wordWidth
-
-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"
-
-cmmTypeSize :: CmmType -> Size
-cmmTypeSize ty | isFloatType ty = floatSize (typeWidth ty)
- | otherwise = intSize (typeWidth ty)
-
-isFloatSize :: Size -> Bool
-isFloatSize FF32 = True
-isFloatSize FF64 = True
-isFloatSize FF80 = True
-isFloatSize other = False
-#endif
-
-#if alpha_TARGET_ARCH
-data Size
- = B -- byte
- | Bu
--- | W -- word (2 bytes): UNUSED
--- | Wu -- : UNUSED
- | L -- longword (4 bytes)
- | Q -- quadword (8 bytes)
--- | FF -- VAX F-style floating pt: UNUSED
--- | GF -- VAX G-style floating pt: UNUSED
--- | DF -- VAX D-style floating pt: UNUSED
--- | SF -- IEEE single-precision floating pt: UNUSED
- | TF -- IEEE double-precision floating pt
- deriving Eq
-#endif
-
-#if sparc_TARGET_ARCH /* || powerpc_TARGET_ARCH */
-data Size
- = II8 -- byte (signed)
--- | II8u -- byte (unsigned)
- | II16 -- halfword (signed, 2 bytes)
--- | II16u -- halfword (unsigned, 2 bytes)
- | II32 -- word (4 bytes)
- | II64 -- word (8 bytes)
- | FF32 -- IEEE single-precision floating pt
- | FF64 -- IEEE single-precision floating pt
- deriving Eq
-
-
-intSize, floatSize :: Width -> Size
-intSize W8 = II8
---intSize W16 = II16u
-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)
-
-wordSize :: Size
-wordSize = intSize wordWidth
-
-isFloatSize :: Size -> Bool
-isFloatSize FF32 = True
-isFloatSize FF64 = True
-isFloatSize _ = False
-
-cmmTypeSize :: CmmType -> Size
-cmmTypeSize ty | isFloatType ty = floatSize (typeWidth ty)
- | otherwise = intSize (typeWidth ty)
-
-sizeToWidth :: Size -> Width
-sizeToWidth size
- = case size of
- II8 -> W8
--- II8u -> W8
- II16 -> W16
--- II16u -> W16
- II32 -> W32
- II64 -> W64
- FF32 -> W32
- FF64 -> W64
-
-
-#endif
-
--- -----------------------------------------------------------------------------
--- Immediates
-
-data Imm
- = ImmInt Int
- | ImmInteger Integer -- Sigh.
- | ImmCLbl CLabel -- AbstractC Label (with baggage)
- | ImmLit Doc -- Simple string
- | ImmIndex CLabel Int
- | ImmFloat Rational
- | ImmDouble Rational
- | ImmConstantSum Imm Imm
- | ImmConstantDiff Imm Imm
-#if sparc_TARGET_ARCH
- | LO Imm {- Possible restrictions... -}
- | HI Imm
-#endif
-#if powerpc_TARGET_ARCH
- | LO Imm
- | HI Imm
- | HA Imm {- high halfword adjusted -}
-#endif
-strImmLit s = ImmLit (text s)
-
-litToImm :: CmmLit -> Imm
-litToImm (CmmInt i w) = ImmInteger (narrowS w i)
- -- narrow to the width: a CmmInt might be out of
- -- range, but we assume that ImmInteger only contains
- -- in-range values. A signed value should be fine here.
-litToImm (CmmFloat f W32) = ImmFloat f
-litToImm (CmmFloat f W64) = ImmDouble f
-litToImm (CmmLabel l) = ImmCLbl l
-litToImm (CmmLabelOff l off) = ImmIndex l off
-litToImm (CmmLabelDiffOff l1 l2 off)
- = ImmConstantSum
- (ImmConstantDiff (ImmCLbl l1) (ImmCLbl l2))
- (ImmInt off)
-litToImm (CmmBlock id) = ImmCLbl (infoTblLbl id)
-
--- -----------------------------------------------------------------------------
--- Addressing modes
-
-data AddrMode
-#if alpha_TARGET_ARCH
- = AddrImm Imm
- | AddrReg Reg
- | AddrRegImm Reg Imm
-#endif
-
-#if i386_TARGET_ARCH || x86_64_TARGET_ARCH
- = AddrBaseIndex EABase EAIndex Displacement
- | ImmAddr Imm Int
-
-data EABase = EABaseNone | EABaseReg Reg | EABaseRip
-data EAIndex = EAIndexNone | EAIndex Reg Int
-type Displacement = Imm
-#endif
-
-#if sparc_TARGET_ARCH
- = AddrRegReg Reg Reg
- | AddrRegImm Reg Imm
-#endif
-
-#if powerpc_TARGET_ARCH
- = AddrRegReg Reg Reg
- | AddrRegImm Reg Imm
-#endif
-
-#if i386_TARGET_ARCH || x86_64_TARGET_ARCH
-addrModeRegs :: AddrMode -> [Reg]
-addrModeRegs (AddrBaseIndex b i _) = b_regs ++ i_regs
- where
- b_regs = case b of { EABaseReg r -> [r]; _ -> [] }
- i_regs = case i of { EAIndex r _ -> [r]; _ -> [] }
-addrModeRegs _ = []
-#endif
-
-
-addrOffset :: AddrMode -> Int -> Maybe AddrMode
-
-addrOffset addr off
- = case addr of
-#if alpha_TARGET_ARCH
- _ -> panic "MachMisc.addrOffset not defined for Alpha"
-#endif
-#if i386_TARGET_ARCH || x86_64_TARGET_ARCH
- ImmAddr i off0 -> Just (ImmAddr i (off0 + off))
-
- AddrBaseIndex r i (ImmInt n) -> Just (AddrBaseIndex r i (ImmInt (n + off)))
- AddrBaseIndex r i (ImmInteger n)
- -> Just (AddrBaseIndex r i (ImmInt (fromInteger (n + toInteger off))))
-
- AddrBaseIndex r i (ImmCLbl lbl)
- -> Just (AddrBaseIndex r i (ImmIndex lbl off))
-
- AddrBaseIndex r i (ImmIndex lbl ix)
- -> Just (AddrBaseIndex r i (ImmIndex lbl (ix+off)))
-
- _ -> Nothing -- in theory, shouldn't happen
-#endif
-#if sparc_TARGET_ARCH
- AddrRegImm r (ImmInt n)
- | fits13Bits n2 -> Just (AddrRegImm r (ImmInt n2))
- | otherwise -> Nothing
- where n2 = n + off
-
- AddrRegImm r (ImmInteger n)
- | fits13Bits n2 -> Just (AddrRegImm r (ImmInt (fromInteger n2)))
- | otherwise -> Nothing
- where n2 = n + toInteger off
-
- AddrRegReg r (RealReg 0)
- | fits13Bits off -> Just (AddrRegImm r (ImmInt off))
- | otherwise -> Nothing
-
- _ -> Nothing
-#endif /* sparc */
-#if powerpc_TARGET_ARCH
- AddrRegImm r (ImmInt n)
- | fits16Bits n2 -> Just (AddrRegImm r (ImmInt n2))
- | otherwise -> Nothing
- where n2 = n + off
-
- AddrRegImm r (ImmInteger n)
- | fits16Bits n2 -> Just (AddrRegImm r (ImmInt (fromInteger n2)))
- | otherwise -> Nothing
- where n2 = n + toInteger off
-
- _ -> Nothing
-#endif /* powerpc */
-
------------------
-#if alpha_TARGET_ARCH
-
-fits8Bits :: Integer -> Bool
-fits8Bits i = i >= -256 && i < 256
-
-#endif
-
-#if sparc_TARGET_ARCH
-
-{-# SPECIALIZE fits13Bits :: Int -> Bool, Integer -> Bool #-}
-fits13Bits :: Integral a => a -> Bool
-fits13Bits x = x >= -4096 && x < 4096
-
------------------
-largeOffsetError i
- = error ("ERROR: SPARC native-code generator cannot handle large offset ("
- ++show i++");\nprobably because of large constant data structures;" ++
- "\nworkaround: use -fvia-C on this module.\n")
-
-#endif /* sparc */
-
-#if powerpc_TARGET_ARCH
-fits16Bits :: Integral a => a -> Bool
-fits16Bits x = x >= -32768 && x < 32768
-
-makeImmediate :: Integral a => Width -> Bool -> a -> Maybe Imm
-makeImmediate rep signed x = fmap ImmInt (toI16 rep signed)
- where
- narrow W32 False = fromIntegral (fromIntegral x :: Word32)
- narrow W16 False = fromIntegral (fromIntegral x :: Word16)
- narrow W8 False = fromIntegral (fromIntegral x :: Word8)
- narrow W32 True = fromIntegral (fromIntegral x :: Int32)
- narrow W16 True = fromIntegral (fromIntegral x :: Int16)
- narrow W8 True = fromIntegral (fromIntegral x :: Int8)
-
- narrowed = narrow rep signed
-
- toI16 W32 True
- | narrowed >= -32768 && narrowed < 32768 = Just narrowed
- | otherwise = Nothing
- toI16 W32 False
- | narrowed >= 0 && narrowed < 65536 = Just narrowed
- | otherwise = Nothing
- toI16 _ _ = Just narrowed
-#endif
-
-
--- @spRel@ gives us a stack relative addressing mode for volatile
--- temporaries and for excess call arguments. @fpRel@, where
--- applicable, is the same but for the frame pointer.
-
-spRel :: Int -- desired stack offset in words, positive or negative
- -> AddrMode
-
-spRel n
-#if defined(i386_TARGET_ARCH)
- = AddrBaseIndex (EABaseReg esp) EAIndexNone (ImmInt (n * wORD_SIZE))
-#elif defined(x86_64_TARGET_ARCH)
- = AddrBaseIndex (EABaseReg rsp) EAIndexNone (ImmInt (n * wORD_SIZE))
-#else
- = AddrRegImm sp (ImmInt (n * wORD_SIZE))
-#endif
-
-#if sparc_TARGET_ARCH
-fpRel :: Int -> AddrMode
- -- Duznae work for offsets greater than 13 bits; we just hope for
- -- the best
-fpRel n
- = AddrRegImm fp (ImmInt (n * wORD_SIZE))
-#endif
-
-#if x86_64_TARGET_ARCH
-ripRel imm = AddrBaseIndex EABaseRip EAIndexNone imm
-#endif
-
--- -----------------------------------------------------------------------------
--- Global registers
-
--- 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)
-
--- ---------------------------------------------------------------------------
--- Registers
-
--- RealRegs are machine regs which are available for allocation, in
--- the usual way. We know what class they are, because that's part of
--- the processor's architecture.
-
--- VirtualRegs are virtual registers. The register allocator will
--- eventually have to map them into RealRegs, or into spill slots.
--- VirtualRegs are allocated on the fly, usually to represent a single
--- value in the abstract assembly code (i.e. dynamic registers are
--- usually single assignment). With the new register allocator, the
--- single assignment restriction isn't necessary to get correct code,
--- although a better register allocation will result if single
--- assignment is used -- because the allocator maps a VirtualReg into
--- a single RealReg, even if the VirtualReg has multiple live ranges.
-
--- Virtual regs can be of either class, so that info is attached.
-
--- Determine the upper-half vreg for a 64-bit quantity on a 32-bit platform
--- when supplied with the vreg for the lower-half of the quantity.
--- (NB. Not reversible).
-getHiVRegFromLo (VirtualRegI u)
- = VirtualRegHi (newTagUnique u 'H') -- makes a pseudo-unique with tag 'H'
-getHiVRegFromLo other
- = pprPanic "getHiVRegFromLo" (ppr other)
-
-data RegClass
- = RcInteger
- | RcFloat
- | RcDouble
- deriving Eq
-
-instance Uniquable RegClass where
- getUnique RcInteger = mkUnique 'L' 0
- getUnique RcFloat = mkUnique 'L' 1
- getUnique RcDouble = mkUnique 'L' 2
-
-type RegNo = Int
-
-data Reg
- = RealReg {-# UNPACK #-} !RegNo
- | VirtualRegI {-# UNPACK #-} !Unique
- | VirtualRegHi {-# UNPACK #-} !Unique -- High part of 2-word register
- | VirtualRegF {-# UNPACK #-} !Unique
- | VirtualRegD {-# UNPACK #-} !Unique
- deriving (Eq,Ord)
-
--- We like to have Uniques for Reg so that we can make UniqFM and UniqSets
--- in the register allocator.
-instance Uniquable Reg where
- getUnique (RealReg i) = mkUnique 'C' i
- getUnique (VirtualRegI u) = u
- getUnique (VirtualRegHi u) = u
- getUnique (VirtualRegF u) = u
- getUnique (VirtualRegD u) = u
-
-unRealReg (RealReg i) = i
-unRealReg vreg = pprPanic "unRealReg on VirtualReg" (ppr vreg)
-
-mkVReg :: Unique -> Size -> Reg
-mkVReg u size
- | not (isFloatSize size) = VirtualRegI u
- | otherwise
- = case size of
-#if sparc_TARGET_ARCH
- FF32 -> VirtualRegF u
- FF64 -> VirtualRegD u
-#else
- FF32 -> VirtualRegD u
- FF64 -> VirtualRegD u
-#endif
- _other -> panic "mkVReg"
-
-isVirtualReg :: Reg -> Bool
-isVirtualReg (RealReg _) = False
-isVirtualReg (VirtualRegI _) = True
-isVirtualReg (VirtualRegHi _) = True
-isVirtualReg (VirtualRegF _) = True
-isVirtualReg (VirtualRegD _) = True
-
-isRealReg :: Reg -> Bool
-isRealReg = not . isVirtualReg
-
-renameVirtualReg :: Unique -> Reg -> Reg
-renameVirtualReg u r
- = case r of
- RealReg _ -> error "renameVirtualReg: can't change unique on a real reg"
- VirtualRegI _ -> VirtualRegI u
- VirtualRegHi _ -> VirtualRegHi u
- VirtualRegF _ -> VirtualRegF u
- VirtualRegD _ -> VirtualRegD u
-
-instance Show Reg where
- show (RealReg i) = showReg i
- show (VirtualRegI u) = "%vI_" ++ show u
- show (VirtualRegHi u) = "%vHi_" ++ show u
- show (VirtualRegF u) = "%vF_" ++ show u
- show (VirtualRegD u) = "%vD_" ++ show u
-
-instance Outputable RegClass where
- ppr RcInteger = Outputable.text "I"
- ppr RcFloat = Outputable.text "F"
- ppr RcDouble = Outputable.text "D"
-
-instance Outputable Reg where
- ppr r = Outputable.text (show r)
-
-
-
-
--- trivColorable function for the graph coloring allocator
--- This gets hammered by scanGraph during register allocation,
--- so needs to be fairly efficient.
---
--- NOTE: This only works for arcitectures with just RcInteger and RcDouble
--- (which are disjoint) ie. x86, x86_64 and ppc
---
-
--- BL 2007/09
--- Doing a nice fold over the UniqSet makes trivColorable use
--- 32% of total compile time and 42% of total alloc when compiling SHA1.lhs from darcs.
-{-
-trivColorable :: RegClass -> UniqSet Reg -> UniqSet Reg -> Bool
-trivColorable classN conflicts exclusions
- = let
-
- acc :: Reg -> (Int, Int) -> (Int, Int)
- acc r (cd, cf)
- = case regClass r of
- RcInteger -> (cd+1, cf)
- RcDouble -> (cd, cf+1)
- _ -> panic "MachRegs.trivColorable: reg class not handled"
-
- tmp = foldUniqSet acc (0, 0) conflicts
- (countInt, countFloat) = foldUniqSet acc tmp exclusions
-
- squeese = worst countInt classN RcInteger
- + worst countFloat classN RcDouble
-
- in squeese < allocatableRegsInClass classN
-
--- | Worst case displacement
--- node N of classN has n neighbors of class C.
---
--- We currently only have RcInteger and RcDouble, which don't conflict at all.
--- This is a bit boring compared to what's in RegArchX86.
---
-worst :: Int -> RegClass -> RegClass -> Int
-worst n classN classC
- = case classN of
- RcInteger
- -> case classC of
- RcInteger -> min n (allocatableRegsInClass RcInteger)
- RcDouble -> 0
-
- RcDouble
- -> case classC of
- RcDouble -> min n (allocatableRegsInClass RcDouble)
- RcInteger -> 0
--}
-
-
--- The number of allocatable regs is hard coded here so we can do a fast comparision
--- in trivColorable. It's ok if these numbers are _less_ than the actual number of
--- free regs, but they can't be more or the register conflict graph won't color.
---
--- There is an allocatableRegsInClass :: RegClass -> Int, but doing the unboxing
--- is too slow for us here.
---
--- Compare MachRegs.freeRegs and MachRegs.h to get these numbers.
---
-#if i386_TARGET_ARCH
-#define ALLOCATABLE_REGS_INTEGER (_ILIT(3))
-#define ALLOCATABLE_REGS_DOUBLE (_ILIT(6))
-
-#elif x86_64_TARGET_ARCH
-#define ALLOCATABLE_REGS_INTEGER (_ILIT(5))
-#define ALLOCATABLE_REGS_DOUBLE (_ILIT(2))
-
-#elif powerpc_TARGET_ARCH
-#define ALLOCATABLE_REGS_INTEGER (_ILIT(16))
-#define ALLOCATABLE_REGS_DOUBLE (_ILIT(26))
-
-#elif sparc_TARGET_ARCH
-#define ALLOCATABLE_REGS_INTEGER (_ILIT(3))
-#define ALLOCATABLE_REGS_DOUBLE (_ILIT(6))
-
-#else
-#error ToDo: define ALLOCATABLE_REGS_INTEGER and ALLOCATABLE_REGS_DOUBLE
-#endif
-
-{-# INLINE regClass #-}
-trivColorable :: RegClass -> UniqSet Reg -> UniqSet Reg -> Bool
-trivColorable classN conflicts exclusions
- = {-# SCC "trivColorable" #-}
- let
- isSqueesed cI cF ufm
- = case ufm of
- NodeUFM _ _ left right
- -> case isSqueesed cI cF right of
- (# s, cI', cF' #)
- -> case s of
- False -> isSqueesed cI' cF' left
- True -> (# True, cI', cF' #)
-
- LeafUFM _ reg
- -> case regClass reg of
- RcInteger
- -> case cI +# _ILIT(1) of
- cI' -> (# cI' >=# ALLOCATABLE_REGS_INTEGER, cI', cF #)
-
- RcDouble
- -> case cF +# _ILIT(1) of
- cF' -> (# cF' >=# ALLOCATABLE_REGS_DOUBLE, cI, cF' #)
-
- EmptyUFM
- -> (# False, cI, cF #)
-
- in case isSqueesed (_ILIT(0)) (_ILIT(0)) conflicts of
- (# False, cI', cF' #)
- -> case isSqueesed cI' cF' exclusions of
- (# s, _, _ #) -> not s
-
- (# True, _, _ #)
- -> False
-
-
-
--- -----------------------------------------------------------------------------
--- Machine-specific register stuff
-
--- The Alpha has 64 registers of interest; 32 integer registers and 32 floating
--- point registers. The mapping of STG registers to alpha machine registers
--- is defined in StgRegs.h. We are, of course, prepared for any eventuality.
-
-#if alpha_TARGET_ARCH
-fReg :: Int -> RegNo
-fReg x = (32 + x)
-
-v0, f0, ra, pv, gp, sp, zeroh :: Reg
-v0 = realReg 0
-f0 = realReg (fReg 0)
-ra = FixedReg ILIT(26)
-pv = t12
-gp = FixedReg ILIT(29)
-sp = FixedReg ILIT(30)
-zeroh = FixedReg ILIT(31) -- "zero" is used in 1.3 (MonadZero method)
-
-t9, t10, t11, t12 :: Reg
-t9 = realReg 23
-t10 = realReg 24
-t11 = realReg 25
-t12 = realReg 27
-#endif
-
-{-
-Intel x86 architecture:
-- All registers except 7 (esp) are available for use.
-- Only ebx, esi, edi and esp are available across a C call (they are callee-saves).
-- Registers 0-7 have 16-bit counterparts (ax, bx etc.)
-- Registers 0-3 have 8 bit counterparts (ah, bh etc.)
-- Registers 8-13 are fakes; we pretend x86 has 6 conventionally-addressable
- fp registers, and 3-operand insns for them, and we translate this into
- real stack-based x86 fp code after register allocation.
-
-The fp registers are all Double registers; we don't have any RcFloat class
-regs. @regClass@ barfs if you give it a VirtualRegF, and mkVReg above should
-never generate them.
--}
-
-#if i386_TARGET_ARCH
-
-fake0, fake1, fake2, fake3, fake4, fake5,
- eax, ebx, ecx, edx, esp, ebp, esi, edi :: Reg
-eax = RealReg 0
-ebx = RealReg 1
-ecx = RealReg 2
-edx = RealReg 3
-esi = RealReg 4
-edi = RealReg 5
-ebp = RealReg 6
-esp = RealReg 7
-fake0 = RealReg 8
-fake1 = RealReg 9
-fake2 = RealReg 10
-fake3 = RealReg 11
-fake4 = RealReg 12
-fake5 = RealReg 13
-
-
--- On x86, we might want to have an 8-bit RegClass, which would
--- contain just regs 1-4 (the others don't have 8-bit versions).
--- However, we can get away without this at the moment because the
--- only allocatable integer regs are also 8-bit compatible (1, 3, 4).
-regClass (RealReg i) = if i < 8 then RcInteger else RcDouble
-regClass (VirtualRegI u) = RcInteger
-regClass (VirtualRegHi u) = RcInteger
-regClass (VirtualRegD u) = RcDouble
-regClass (VirtualRegF u) = pprPanic "regClass(x86):VirtualRegF"
- (ppr (VirtualRegF u))
-
-regNames
- = ["%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi", "%ebp", "%esp",
- "%fake0", "%fake1", "%fake2", "%fake3", "%fake4", "%fake5", "%fake6"]
-
-showReg :: RegNo -> String
-showReg n
- = if n >= 0 && n < 14
- then regNames !! n
- else "%unknown_x86_real_reg_" ++ show n
-
-
-#endif
-
-{-
-AMD x86_64 architecture:
-- Registers 0-16 have 32-bit counterparts (eax, ebx etc.)
-- Registers 0-7 have 16-bit counterparts (ax, bx etc.)
-- Registers 0-3 have 8 bit counterparts (ah, bh etc.)
-
--}
-
-#if x86_64_TARGET_ARCH
-
-rax, rbx, rcx, rdx, rsp, rbp, rsi, rdi,
- r8, r9, r10, r11, r12, r13, r14, r15,
- xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7,
- xmm8, xmm9, xmm10, xmm11, xmm12, xmm13, xmm14, xmm15 :: Reg
-
-rax = RealReg 0
-rbx = RealReg 1
-rcx = RealReg 2
-rdx = RealReg 3
-rsi = RealReg 4
-rdi = RealReg 5
-rbp = RealReg 6
-rsp = RealReg 7
-r8 = RealReg 8
-r9 = RealReg 9
-r10 = RealReg 10
-r11 = RealReg 11
-r12 = RealReg 12
-r13 = RealReg 13
-r14 = RealReg 14
-r15 = RealReg 15
-xmm0 = RealReg 16
-xmm1 = RealReg 17
-xmm2 = RealReg 18
-xmm3 = RealReg 19
-xmm4 = RealReg 20
-xmm5 = RealReg 21
-xmm6 = RealReg 22
-xmm7 = RealReg 23
-xmm8 = RealReg 24
-xmm9 = RealReg 25
-xmm10 = RealReg 26
-xmm11 = RealReg 27
-xmm12 = RealReg 28
-xmm13 = RealReg 29
-xmm14 = RealReg 30
-xmm15 = RealReg 31
-
- -- so we can re-use some x86 code:
-eax = rax
-ebx = rbx
-ecx = rcx
-edx = rdx
-esi = rsi
-edi = rdi
-ebp = rbp
-esp = rsp
-
-xmm n = RealReg (16+n)
-
--- On x86, we might want to have an 8-bit RegClass, which would
--- contain just regs 1-4 (the others don't have 8-bit versions).
--- However, we can get away without this at the moment because the
--- only allocatable integer regs are also 8-bit compatible (1, 3, 4).
-regClass (RealReg i) = if i < 16 then RcInteger else RcDouble
-regClass (VirtualRegI u) = RcInteger
-regClass (VirtualRegHi u) = RcInteger
-regClass (VirtualRegD u) = RcDouble
-regClass (VirtualRegF u) = pprPanic "regClass(x86_64):VirtualRegF"
- (ppr (VirtualRegF u))
-
-regNames
- = ["%rax", "%rbx", "%rcx", "%rdx", "%rsi", "%rdi", "%rbp", "%rsp" ]
-
-showReg :: RegNo -> String
-showReg n
- | n >= 16 = "%xmm" ++ show (n-16)
- | n >= 8 = "%r" ++ show n
- | otherwise = regNames !! n
-
-#endif
-
-{-
-The SPARC has 64 registers of interest; 32 integer registers and 32
-floating point registers. The mapping of STG registers to SPARC
-machine registers is defined in StgRegs.h. We are, of course,
-prepared for any eventuality.
-
-The whole fp-register pairing thing on sparcs is a huge nuisance. See
-fptools/ghc/includes/MachRegs.h for a description of what's going on
-here.
--}
-
-#if sparc_TARGET_ARCH
-
-gReg,lReg,iReg,oReg,fReg :: Int -> RegNo
-gReg x = x
-oReg x = (8 + x)
-lReg x = (16 + x)
-iReg x = (24 + x)
-fReg x = (32 + x)
-
-nCG_FirstFloatReg :: RegNo
-nCG_FirstFloatReg = unRealReg NCG_FirstFloatReg
-
-regClass (VirtualRegI u) = RcInteger
-regClass (VirtualRegHi u) = RcInteger
-regClass (VirtualRegF u) = RcFloat
-regClass (VirtualRegD u) = RcDouble
-regClass (RealReg i) | i < 32 = RcInteger
- | i < nCG_FirstFloatReg = RcDouble
- | otherwise = RcFloat
-
-showReg :: RegNo -> String
-showReg n
- | n >= 0 && n < 8 = "%g" ++ show n
- | n >= 8 && n < 16 = "%o" ++ show (n-8)
- | n >= 16 && n < 24 = "%l" ++ show (n-16)
- | n >= 24 && n < 32 = "%i" ++ show (n-24)
- | n >= 32 && n < 64 = "%f" ++ show (n-32)
- | otherwise = "%unknown_sparc_real_reg_" ++ show n
-
-g0, g1, g2, fp, sp, o0, o1, f0, f1, f6, f8, f22, f26, f27 :: Reg
-
-f6 = RealReg (fReg 6)
-f8 = RealReg (fReg 8)
-f22 = RealReg (fReg 22)
-f26 = RealReg (fReg 26)
-f27 = RealReg (fReg 27)
-
-
--- g0 is useful for codegen; is always zero, and writes to it vanish.
-g0 = RealReg (gReg 0)
-g1 = RealReg (gReg 1)
-g2 = RealReg (gReg 2)
-
--- FP, SP, int and float return (from C) regs.
-fp = RealReg (iReg 6)
-sp = RealReg (oReg 6)
-o0 = RealReg (oReg 0)
-o1 = RealReg (oReg 1)
-f0 = RealReg (fReg 0)
-f1 = RealReg (fReg 1)
-
-#endif
-
-{-
-The PowerPC has 64 registers of interest; 32 integer registers and 32 floating
-point registers.
--}
-
-#if powerpc_TARGET_ARCH
-fReg :: Int -> RegNo
-fReg x = (32 + x)
-
-regClass (VirtualRegI u) = RcInteger
-regClass (VirtualRegHi u) = RcInteger
-regClass (VirtualRegF u) = pprPanic "regClass(ppc):VirtualRegF"
- (ppr (VirtualRegF u))
-regClass (VirtualRegD u) = RcDouble
-regClass (RealReg i) | i < 32 = RcInteger
- | otherwise = RcDouble
-
-showReg :: RegNo -> String
-showReg n
- | n >= 0 && n <= 31 = "%r" ++ show n
- | n >= 32 && n <= 63 = "%f" ++ show (n - 32)
- | otherwise = "%unknown_powerpc_real_reg_" ++ show n
-
-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
-#endif
-
-{-
-Redefine the literals used for machine-registers with non-numeric
-names in the header files. Gag me with a spoon, eh?
--}
-
-#if alpha_TARGET_ARCH
-#define f0 32
-#define f1 33
-#define f2 34
-#define f3 35
-#define f4 36
-#define f5 37
-#define f6 38
-#define f7 39
-#define f8 40
-#define f9 41
-#define f10 42
-#define f11 43
-#define f12 44
-#define f13 45
-#define f14 46
-#define f15 47
-#define f16 48
-#define f17 49
-#define f18 50
-#define f19 51
-#define f20 52
-#define f21 53
-#define f22 54
-#define f23 55
-#define f24 56
-#define f25 57
-#define f26 58
-#define f27 59
-#define f28 60
-#define f29 61
-#define f30 62
-#define f31 63
-#endif
-#if i386_TARGET_ARCH
-#define eax 0
-#define ebx 1
-#define ecx 2
-#define edx 3
-#define esi 4
-#define edi 5
-#define ebp 6
-#define esp 7
-#define fake0 8
-#define fake1 9
-#define fake2 10
-#define fake3 11
-#define fake4 12
-#define fake5 13
-#endif
-
-#if x86_64_TARGET_ARCH
-#define rax 0
-#define rbx 1
-#define rcx 2
-#define rdx 3
-#define rsi 4
-#define rdi 5
-#define rbp 6
-#define rsp 7
-#define r8 8
-#define r9 9
-#define r10 10
-#define r11 11
-#define r12 12
-#define r13 13
-#define r14 14
-#define r15 15
-#define xmm0 16
-#define xmm1 17
-#define xmm2 18
-#define xmm3 19
-#define xmm4 20
-#define xmm5 21
-#define xmm6 22
-#define xmm7 23
-#define xmm8 24
-#define xmm9 25
-#define xmm10 26
-#define xmm11 27
-#define xmm12 28
-#define xmm13 29
-#define xmm14 30
-#define xmm15 31
-#endif
-
-#if sparc_TARGET_ARCH
-#define g0 0
-#define g1 1
-#define g2 2
-#define g3 3
-#define g4 4
-#define g5 5
-#define g6 6
-#define g7 7
-#define o0 8
-#define o1 9
-#define o2 10
-#define o3 11
-#define o4 12
-#define o5 13
-#define o6 14
-#define o7 15
-#define l0 16
-#define l1 17
-#define l2 18
-#define l3 19
-#define l4 20
-#define l5 21
-#define l6 22
-#define l7 23
-#define i0 24
-#define i1 25
-#define i2 26
-#define i3 27
-#define i4 28
-#define i5 29
-#define i6 30
-#define i7 31
-
-#define f0 32
-#define f1 33
-#define f2 34
-#define f3 35
-#define f4 36
-#define f5 37
-#define f6 38
-#define f7 39
-#define f8 40
-#define f9 41
-#define f10 42
-#define f11 43
-#define f12 44
-#define f13 45
-#define f14 46
-#define f15 47
-#define f16 48
-#define f17 49
-#define f18 50
-#define f19 51
-#define f20 52
-#define f21 53
-#define f22 54
-#define f23 55
-#define f24 56
-#define f25 57
-#define f26 58
-#define f27 59
-#define f28 60
-#define f29 61
-#define f30 62
-#define f31 63
-#endif
-
-#if powerpc_TARGET_ARCH
-#define r0 0
-#define r1 1
-#define r2 2
-#define r3 3
-#define r4 4
-#define r5 5
-#define r6 6
-#define r7 7
-#define r8 8
-#define r9 9
-#define r10 10
-#define r11 11
-#define r12 12
-#define r13 13
-#define r14 14
-#define r15 15
-#define r16 16
-#define r17 17
-#define r18 18
-#define r19 19
-#define r20 20
-#define r21 21
-#define r22 22
-#define r23 23
-#define r24 24
-#define r25 25
-#define r26 26
-#define r27 27
-#define r28 28
-#define r29 29
-#define r30 30
-#define r31 31
-
-#ifdef darwin_TARGET_OS
-#define f0 32
-#define f1 33
-#define f2 34
-#define f3 35
-#define f4 36
-#define f5 37
-#define f6 38
-#define f7 39
-#define f8 40
-#define f9 41
-#define f10 42
-#define f11 43
-#define f12 44
-#define f13 45
-#define f14 46
-#define f15 47
-#define f16 48
-#define f17 49
-#define f18 50
-#define f19 51
-#define f20 52
-#define f21 53
-#define f22 54
-#define f23 55
-#define f24 56
-#define f25 57
-#define f26 58
-#define f27 59
-#define f28 60
-#define f29 61
-#define f30 62
-#define f31 63
-#else
-#define fr0 32
-#define fr1 33
-#define fr2 34
-#define fr3 35
-#define fr4 36
-#define fr5 37
-#define fr6 38
-#define fr7 39
-#define fr8 40
-#define fr9 41
-#define fr10 42
-#define fr11 43
-#define fr12 44
-#define fr13 45
-#define fr14 46
-#define fr15 47
-#define fr16 48
-#define fr17 49
-#define fr18 50
-#define fr19 51
-#define fr20 52
-#define fr21 53
-#define fr22 54
-#define fr23 55
-#define fr24 56
-#define fr25 57
-#define fr26 58
-#define fr27 59
-#define fr28 60
-#define fr29 61
-#define fr30 62
-#define fr31 63
-#endif
-#endif
-
-
--- allMachRegs is the complete set of machine regs.
-allMachRegNos :: [RegNo]
-allMachRegNos
- = IF_ARCH_alpha( [0..63],
- IF_ARCH_i386( [0..13],
- IF_ARCH_x86_64( [0..31],
- IF_ARCH_sparc( ([0..31]
- ++ [f0,f2 .. nCG_FirstFloatReg-1]
- ++ [nCG_FirstFloatReg .. f31]),
- IF_ARCH_powerpc([0..63],
- )))))
-
--- 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
-
-
--- | The number of regs in each class.
--- We go via top level CAFs to ensure that we're not recomputing
--- the length of these lists each time the fn is called.
-allocatableRegsInClass :: RegClass -> Int
-allocatableRegsInClass cls
- = case cls of
- RcInteger -> allocatableRegsInteger
- RcDouble -> allocatableRegsDouble
-
-allocatableRegsInteger
- = length $ filter (\r -> regClass r == RcInteger)
- $ map RealReg allocatableRegs
-
-allocatableRegsDouble
- = length $ filter (\r -> regClass r == RcDouble)
- $ map RealReg allocatableRegs
-
-
--- these are the regs which we cannot assume stay alive over a
--- C call.
-callClobberedRegs :: [Reg]
-callClobberedRegs
- =
-#if alpha_TARGET_ARCH
- [0, 1, 2, 3, 4, 5, 6, 7, 8,
- 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
- fReg 0, fReg 1, fReg 10, fReg 11, fReg 12, fReg 13, fReg 14, fReg 15,
- fReg 16, fReg 17, fReg 18, fReg 19, fReg 20, fReg 21, fReg 22, fReg 23,
- fReg 24, fReg 25, fReg 26, fReg 27, fReg 28, fReg 29, fReg 30]
-#endif /* alpha_TARGET_ARCH */
-#if i386_TARGET_ARCH
- -- caller-saves registers
- map RealReg [eax,ecx,edx,fake0,fake1,fake2,fake3,fake4,fake5]
-#endif /* i386_TARGET_ARCH */
-#if x86_64_TARGET_ARCH
- -- caller-saves registers
- map RealReg ([rax,rcx,rdx,rsi,rdi,r8,r9,r10,r11] ++ [16..31])
- -- all xmm regs are caller-saves
-#endif /* x86_64_TARGET_ARCH */
-#if sparc_TARGET_ARCH
- map RealReg
- ( oReg 7 :
- [oReg i | i <- [0..5]] ++
- [gReg i | i <- [1..7]] ++
- [fReg i | i <- [0..31]] )
-#endif /* sparc_TARGET_ARCH */
-#if powerpc_TARGET_ARCH
-#if darwin_TARGET_OS
- map RealReg (0:[2..12] ++ map fReg [0..13])
-#elif linux_TARGET_OS
- map RealReg (0:[2..13] ++ map fReg [0..13])
-#endif
-#endif /* powerpc_TARGET_ARCH */
-
-
--- argRegs is the set of regs which are read for an n-argument call to C.
--- For archs which pass all args on the stack (x86), is empty.
--- Sparc passes up to the first 6 args in regs.
--- Dunno about Alpha.
-argRegs :: RegNo -> [Reg]
-
-#if i386_TARGET_ARCH
-argRegs _ = panic "MachRegs.argRegs(x86): should not be used!"
-#endif
-
-#if x86_64_TARGET_ARCH
-argRegs _ = panic "MachRegs.argRegs(x86_64): should not be used!"
-#endif
-
-#if alpha_TARGET_ARCH
-argRegs 0 = []
-argRegs 1 = freeMappedRegs [16, fReg 16]
-argRegs 2 = freeMappedRegs [16, 17, fReg 16, fReg 17]
-argRegs 3 = freeMappedRegs [16, 17, 18, fReg 16, fReg 17, fReg 18]
-argRegs 4 = freeMappedRegs [16, 17, 18, 19, fReg 16, fReg 17, fReg 18, fReg 19]
-argRegs 5 = freeMappedRegs [16, 17, 18, 19, 20, fReg 16, fReg 17, fReg 18, fReg 19, fReg 20]
-argRegs 6 = freeMappedRegs [16, 17, 18, 19, 20, 21, fReg 16, fReg 17, fReg 18, fReg 19, fReg 20, fReg 21]
-argRegs _ = panic "MachRegs.argRegs(alpha): don't know about >6 arguments!"
-#endif /* alpha_TARGET_ARCH */
-
-#if sparc_TARGET_ARCH
-argRegs 0 = []
-argRegs 1 = map (RealReg . oReg) [0]
-argRegs 2 = map (RealReg . oReg) [0,1]
-argRegs 3 = map (RealReg . oReg) [0,1,2]
-argRegs 4 = map (RealReg . oReg) [0,1,2,3]
-argRegs 5 = map (RealReg . oReg) [0,1,2,3,4]
-argRegs 6 = map (RealReg . oReg) [0,1,2,3,4,5]
-argRegs _ = panic "MachRegs.argRegs(sparc): don't know about >6 arguments!"
-#endif /* sparc_TARGET_ARCH */
-
-#if powerpc_TARGET_ARCH
-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 _ = panic "MachRegs.argRegs(powerpc): don't know about >8 arguments!"
-#endif /* powerpc_TARGET_ARCH */
-
-
--- all of the arg regs ??
-#if alpha_TARGET_ARCH
-allArgRegs :: [(Reg, Reg)]
-allArgRegs = [(realReg i, realReg (fReg i)) | i <- [16..21]]
-#endif /* alpha_TARGET_ARCH */
-
-#if sparc_TARGET_ARCH
-allArgRegs :: [Reg]
-allArgRegs = map RealReg [oReg i | i <- [0..5]]
-#endif /* sparc_TARGET_ARCH */
-
-#if i386_TARGET_ARCH
-allArgRegs :: [Reg]
-allArgRegs = panic "MachRegs.allArgRegs(x86): should not be used!"
-#endif
-
-#if x86_64_TARGET_ARCH
-allArgRegs :: [Reg]
-allArgRegs = map RealReg [rdi,rsi,rdx,rcx,r8,r9]
-allFPArgRegs :: [Reg]
-allFPArgRegs = map RealReg [xmm0 .. xmm7]
-#endif
-
-#if powerpc_TARGET_ARCH
-allArgRegs :: [Reg]
-allArgRegs = map RealReg [3..10]
-allFPArgRegs :: [Reg]
-#if darwin_TARGET_OS
-allFPArgRegs = map (RealReg . fReg) [1..13]
-#elif linux_TARGET_OS
-allFPArgRegs = map (RealReg . fReg) [1..8]
-#endif
-#endif /* powerpc_TARGET_ARCH */
-\end{code}
-
-\begin{code}
-freeReg :: RegNo -> FastBool
-
-#if alpha_TARGET_ARCH
-freeReg 26 = fastBool False -- return address (ra)
-freeReg 28 = fastBool False -- reserved for the assembler (at)
-freeReg 29 = fastBool False -- global pointer (gp)
-freeReg 30 = fastBool False -- stack pointer (sp)
-freeReg 31 = fastBool False -- always zero (zeroh)
-freeReg 63 = fastBool False -- always zero (f31)
-#endif
-
-#if i386_TARGET_ARCH
-freeReg esp = fastBool False -- %esp is the C stack pointer
-#endif
-
-#if x86_64_TARGET_ARCH
-freeReg rsp = fastBool False -- %rsp is the C stack pointer
-#endif
-
-#if sparc_TARGET_ARCH
-freeReg g0 = fastBool False -- %g0 is always 0.
-
-freeReg g5 = fastBool False -- %g5 is reserved (ABI).
-freeReg g6 = fastBool False -- %g6 is reserved (ABI).
-freeReg g7 = fastBool False -- %g7 is reserved (ABI).
-freeReg i6 = fastBool False -- %i6 is our frame pointer.
-freeReg i7 = fastBool False -- %i7 tends to have ret-addr-ish things
-freeReg o6 = fastBool False -- %o6 is our stack pointer.
-freeReg o7 = fastBool False -- %o7 holds ret addrs (???)
-freeReg f0 = fastBool False -- %f0/%f1 are the C fp return registers.
-freeReg f1 = fastBool False
-
--- TODO: Not sure about these BL 2009/01/10
--- Used for NCG spill tmps? what is this?
-
-{-
-freeReg g1 = fastBool False -- %g1 is used for NCG spill tmp
-freeReg g2 = fastBool False
-freeReg f6 = fastBool False
-freeReg f8 = fastBool False
-freeReg f26 = fastBool False
-freeReg f27 = fastBool False
--}
-
-#endif
-
-#if powerpc_TARGET_ARCH
-freeReg 0 = fastBool False -- Hack: r0 can't be used in all insns, but it's actually free
-freeReg 1 = fastBool False -- The Stack Pointer
-#if !darwin_TARGET_OS
- -- most non-darwin powerpc OSes use r2 as a TOC pointer or something like that
-freeReg 2 = fastBool False
-#endif
-#endif
-
-#ifdef REG_Base
-freeReg REG_Base = fastBool False
-#endif
-#ifdef REG_R1
-freeReg REG_R1 = fastBool False
-#endif
-#ifdef REG_R2
-freeReg REG_R2 = fastBool False
-#endif
-#ifdef REG_R3
-freeReg REG_R3 = fastBool False
-#endif
-#ifdef REG_R4
-freeReg REG_R4 = fastBool False
-#endif
-#ifdef REG_R5
-freeReg REG_R5 = fastBool False
-#endif
-#ifdef REG_R6
-freeReg REG_R6 = fastBool False
-#endif
-#ifdef REG_R7
-freeReg REG_R7 = fastBool False
-#endif
-#ifdef REG_R8
-freeReg REG_R8 = fastBool False
-#endif
-#ifdef REG_F1
-freeReg REG_F1 = fastBool False
-#endif
-#ifdef REG_F2
-freeReg REG_F2 = fastBool False
-#endif
-#ifdef REG_F3
-freeReg REG_F3 = fastBool False
-#endif
-#ifdef REG_F4
-freeReg REG_F4 = fastBool False
-#endif
-#ifdef REG_D1
-freeReg REG_D1 = fastBool False
-#endif
-#ifdef REG_D2
-freeReg REG_D2 = fastBool False
-#endif
-#ifdef REG_Sp
-freeReg REG_Sp = fastBool False
-#endif
-#ifdef REG_Su
-freeReg REG_Su = fastBool False
-#endif
-#ifdef REG_SpLim
-freeReg REG_SpLim = fastBool False
-#endif
-#ifdef REG_Hp
-freeReg REG_Hp = fastBool False
-#endif
-#ifdef REG_HpLim
-freeReg REG_HpLim = fastBool False
-#endif
-freeReg n = fastBool True
-
-
--- | Returns 'Nothing' if this global register is not stored
--- in a real machine register, otherwise returns @'Just' reg@, where
--- reg is the machine register it is stored in.
-
-globalRegMaybe :: GlobalReg -> Maybe Reg
-
-#ifdef REG_Base
-globalRegMaybe BaseReg = Just (RealReg REG_Base)
-#endif
-#ifdef REG_R1
-globalRegMaybe (VanillaReg 1 _) = Just (RealReg REG_R1)
-#endif
-#ifdef REG_R2
-globalRegMaybe (VanillaReg 2 _) = Just (RealReg REG_R2)
-#endif
-#ifdef REG_R3
-globalRegMaybe (VanillaReg 3 _) = Just (RealReg REG_R3)
-#endif
-#ifdef REG_R4
-globalRegMaybe (VanillaReg 4 _) = Just (RealReg REG_R4)
-#endif
-#ifdef REG_R5
-globalRegMaybe (VanillaReg 5 _) = Just (RealReg REG_R5)
-#endif
-#ifdef REG_R6
-globalRegMaybe (VanillaReg 6 _) = Just (RealReg REG_R6)
-#endif
-#ifdef REG_R7
-globalRegMaybe (VanillaReg 7 _) = Just (RealReg REG_R7)
-#endif
-#ifdef REG_R8
-globalRegMaybe (VanillaReg 8 _) = Just (RealReg REG_R8)
-#endif
-#ifdef REG_R9
-globalRegMaybe (VanillaReg 9 _) = Just (RealReg REG_R9)
-#endif
-#ifdef REG_R10
-globalRegMaybe (VanillaReg 10 _) = Just (RealReg REG_R10)
-#endif
-#ifdef REG_F1
-globalRegMaybe (FloatReg 1) = Just (RealReg REG_F1)
-#endif
-#ifdef REG_F2
-globalRegMaybe (FloatReg 2) = Just (RealReg REG_F2)
-#endif
-#ifdef REG_F3
-globalRegMaybe (FloatReg 3) = Just (RealReg REG_F3)
-#endif
-#ifdef REG_F4
-globalRegMaybe (FloatReg 4) = Just (RealReg REG_F4)
-#endif
-#ifdef REG_D1
-globalRegMaybe (DoubleReg 1) = Just (RealReg REG_D1)
-#endif
-#ifdef REG_D2
-globalRegMaybe (DoubleReg 2) = Just (RealReg REG_D2)
-#endif
-#ifdef REG_Sp
-globalRegMaybe Sp = Just (RealReg REG_Sp)
-#endif
-#ifdef REG_Lng1
-globalRegMaybe (LongReg 1) = Just (RealReg REG_Lng1)
-#endif
-#ifdef REG_Lng2
-globalRegMaybe (LongReg 2) = Just (RealReg REG_Lng2)
-#endif
-#ifdef REG_SpLim
-globalRegMaybe SpLim = Just (RealReg REG_SpLim)
-#endif
-#ifdef REG_Hp
-globalRegMaybe Hp = Just (RealReg REG_Hp)
-#endif
-#ifdef REG_HpLim
-globalRegMaybe HpLim = Just (RealReg REG_HpLim)
-#endif
-#ifdef REG_CurrentTSO
-globalRegMaybe CurrentTSO = Just (RealReg REG_CurrentTSO)
-#endif
-#ifdef REG_CurrentNursery
-globalRegMaybe CurrentNursery = Just (RealReg REG_CurrentNursery)
-#endif
-globalRegMaybe _ = Nothing
-
-
-\end{code}
projects / ghc-hetmet.git / blobdiff