module X86.Regs (
-
- -- sizes
- Size(..),
- intSize,
- floatSize,
- isFloatSize,
- wordSize,
- cmmTypeSize,
- sizeToWidth,
- mkVReg,
-
-- immediates
Imm(..),
strImmLit,
-- horror show
freeReg,
- globalRegMaybe
+ globalRegMaybe,
+
+ get_GlobalReg_reg_or_addr,
+ allocatableRegs
)
where
#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 Outputable ( panic )
import qualified Outputable
-import Unique
import FastBool
--- -----------------------------------------------------------------------------
--- 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
-
-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"
+#if defined(i386_TARGET_ARCH) || defined(x86_64_TARGET_ARCH)
+import Constants
+import Outputable (ppr, pprPanic)
+#endif
-- -----------------------------------------------------------------------------
---
-allArgRegs :: [Reg]
-
-#if i386_TARGET_ARCH
-allArgRegs = panic "X86.Regs.allArgRegs: should not be used!"
-
-#elif x86_64_TARGET_ARCH
-allArgRegs = map RealReg [rdi,rsi,rdx,rcx,r8,r9]
-
-#else
-allArgRegs = panic "X86.Regs.allArgRegs: not defined for this architecture"
-#endif
-
-
--- | these are the regs which we cannot assume stay alive over a C call.
-callClobberedRegs :: [Reg]
-
-#if i386_TARGET_ARCH
--- caller-saves registers
-callClobberedRegs
- = map RealReg [eax,ecx,edx,fake0,fake1,fake2,fake3,fake4,fake5]
-
-#elif x86_64_TARGET_ARCH
--- all xmm regs are caller-saves
--- caller-saves registers
-callClobberedRegs
- = map RealReg ([rax,rcx,rdx,rsi,rdi,r8,r9,r10,r11] ++ [16..31])
-
-#else
-callClobberedRegs
- = panic "X86.Regs.callClobberedRegs: not defined for this architecture"
-#endif
-- | The complete set of machine registers.
-- 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))
+regClass (VirtualRegI _) = RcInteger
+regClass (VirtualRegHi _) = RcInteger
+regClass (VirtualRegD _) = RcDouble
+regClass (VirtualRegF u) = pprPanic ("regClass(x86):VirtualRegF") (ppr u)
#elif x86_64_TARGET_ARCH
-- On x86, we might want to have an 8-bit RegClass, which would
-- 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))
+regClass (VirtualRegI _) = RcInteger
+regClass (VirtualRegHi _) = RcInteger
+regClass (VirtualRegD _) = RcDouble
+regClass (VirtualRegF u) = pprPanic "regClass(x86_64):VirtualRegF" (ppr u)
#else
regClass _ = panic "X86.Regs.regClass: not defined for this architecture"
then regNames !! n
else "%unknown_x86_real_reg_" ++ show n
+regNames :: [String]
regNames
= ["%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi", "%ebp", "%esp",
"%fake0", "%fake1", "%fake2", "%fake3", "%fake4", "%fake5", "%fake6"]
| n >= 8 = "%r" ++ show n
| otherwise = regNames !! n
+regNames :: [String]
regNames
= ["%rax", "%rbx", "%rcx", "%rdx", "%rsi", "%rdi", "%rbp", "%rsp" ]
-- horror show -----------------------------------------------------------------
-freeReg :: RegNo -> FastBool
-globalRegMaybe :: GlobalReg -> Maybe Reg
+freeReg :: RegNo -> FastBool
+globalRegMaybe :: GlobalReg -> Maybe Reg
+allArgRegs :: [Reg]
+callClobberedRegs :: [Reg]
#if defined(i386_TARGET_ARCH) || defined(x86_64_TARGET_ARCH)
#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
#endif
globalRegMaybe _ = Nothing
+--
+
+#if i386_TARGET_ARCH
+allArgRegs = panic "X86.Regs.allArgRegs: should not be used!"
+
+#elif x86_64_TARGET_ARCH
+allArgRegs = map RealReg [rdi,rsi,rdx,rcx,r8,r9]
+
+#else
+allArgRegs = panic "X86.Regs.allArgRegs: not defined for this architecture"
+#endif
+
+
+-- | these are the regs which we cannot assume stay alive over a C call.
+
+#if i386_TARGET_ARCH
+-- caller-saves registers
+callClobberedRegs
+ = map RealReg [eax,ecx,edx,fake0,fake1,fake2,fake3,fake4,fake5]
+
+#elif x86_64_TARGET_ARCH
+-- all xmm regs are caller-saves
+-- caller-saves registers
+callClobberedRegs
+ = map RealReg ([rax,rcx,rdx,rsi,rdi,r8,r9,r10,r11] ++ [16..31])
+
+#else
+callClobberedRegs
+ = panic "X86.Regs.callClobberedRegs: not defined for this architecture"
+#endif
+
#else /* i386_TARGET_ARCH || x86_64_TARGET_ARCH */
+
+
freeReg _ = 0#
globalRegMaybe _ = panic "X86.Regs.globalRegMaybe: not defined"
+allArgRegs = panic "X86.Regs.globalRegMaybe: not defined"
+callClobberedRegs = panic "X86.Regs.globalRegMaybe: not defined"
+
+
#endif
+
+-- 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
+
+
projects / ghc-hetmet.git / blobdiff