-{-# OPTIONS -w #-}
-----------------------------------------------------------------------------
--
-- Generating machine code (instruction selection)
module SPARC.CodeGen (
cmmTopCodeGen,
+ generateJumpTableForInstr,
InstrBlock
)
#include "HsVersions.h"
#include "nativeGen/NCG.h"
-#include "MachDeps.h"
+#include "../includes/MachDeps.h"
-- NCG stuff:
+import SPARC.CodeGen.Sanity
+import SPARC.CodeGen.Amode
+import SPARC.CodeGen.CondCode
+import SPARC.CodeGen.Gen64
+import SPARC.CodeGen.Gen32
+import SPARC.CodeGen.CCall
+import SPARC.CodeGen.Base
+import SPARC.Ppr ()
import SPARC.Instr
-import SPARC.Stack
-import SPARC.Cond
import SPARC.Imm
import SPARC.AddrMode
import SPARC.Regs
-import SPARC.Base
import Instruction
import Size
-import Reg
-import PIC
import NCGMonad
-- Our intermediate code:
import BlockId
-import Cmm
+import OldCmm
import CLabel
-- The rest:
-import BasicTypes
import StaticFlags ( opt_PIC )
import OrdList
-import qualified Outputable as O
import Outputable
-import FastString
+import Unique
import Control.Monad ( mapAndUnzipM )
-import Data.Int
-import DynFlags
-- | Top level code generation
cmmTopCodeGen
- :: DynFlags
- -> RawCmmTop
+ :: RawCmmTop
-> NatM [NatCmmTop Instr]
-cmmTopCodeGen _
- (CmmProc info lab params (ListGraph blocks))
+cmmTopCodeGen
+ (CmmProc info lab (ListGraph blocks))
= do
(nat_blocks,statics) <- mapAndUnzipM basicBlockCodeGen blocks
--- picBaseMb <- getPicBaseMaybeNat
- let proc = CmmProc info lab params (ListGraph $ concat nat_blocks)
+ let proc = CmmProc info lab (ListGraph $ concat nat_blocks)
let tops = proc : concat statics
--- case picBaseMb of
--- Just picBase -> initializePicBase picBase tops
--- Nothing -> return tops
-
return tops
-
-cmmTopCodeGen _ (CmmData sec dat) = do
+cmmTopCodeGen (CmmData sec dat) = do
return [CmmData sec dat] -- no translation, we just use CmmStatic
-
+-- | Do code generation on a single block of CMM code.
+-- code generation may introduce new basic block boundaries, which
+-- are indicated by the NEWBLOCK instruction. We must split up the
+-- instruction stream into basic blocks again. Also, we extract
+-- LDATAs here too.
basicBlockCodeGen
:: CmmBasicBlock
-> NatM ( [NatBasicBlock Instr]
, [NatCmmTop Instr])
-basicBlockCodeGen (BasicBlock id stmts) = do
+basicBlockCodeGen cmm@(BasicBlock id stmts) = do
instrs <- stmtsToInstrs stmts
- -- code generation may introduce new basic block boundaries, which
- -- are indicated by the NEWBLOCK instruction. We must split up the
- -- instruction stream into basic blocks again. Also, we extract
- -- LDATAs here too.
let
- (top,other_blocks,statics) = foldrOL mkBlocks ([],[],[]) instrs
+ (top,other_blocks,statics)
+ = foldrOL mkBlocks ([],[],[]) instrs
mkBlocks (NEWBLOCK id) (instrs,blocks,statics)
= ([], BasicBlock id instrs : blocks, statics)
+
mkBlocks (LDATA sec dat) (instrs,blocks,statics)
= (instrs, blocks, CmmData sec dat:statics)
+
mkBlocks instr (instrs,blocks,statics)
= (instr:instrs, blocks, statics)
- -- in
- return (BasicBlock id top : other_blocks, statics)
+ -- do intra-block sanity checking
+ blocksChecked
+ = map (checkBlock cmm)
+ $ BasicBlock id top : other_blocks
+
+ return (blocksChecked, statics)
+
+-- | Convert some Cmm statements to SPARC instructions.
stmtsToInstrs :: [CmmStmt] -> NatM InstrBlock
stmtsToInstrs stmts
= do instrss <- mapM stmtToInstrs stmts
-> panic "stmtToInstrs: return statement should have been cps'd away"
---------------------------------------------------------------------------------
--- | 'InstrBlock's are the insn sequences generated by the insn selectors.
--- They are really trees of insns to facilitate fast appending, where a
--- left-to-right traversal yields the insns in the correct order.
---
-type InstrBlock
- = OrdList Instr
-
-
--- | Condition codes passed up the tree.
---
-data CondCode
- = CondCode Bool Cond InstrBlock
-
-
--- | a.k.a "Register64"
--- Reg is the lower 32-bit temporary which contains the result.
--- Use getHiVRegFromLo to find the other VRegUnique.
---
--- Rules of this simplified insn selection game are therefore that
--- the returned Reg may be modified
---
-data ChildCode64
- = ChildCode64
- InstrBlock
- Reg
-
-
--- | Register's passed up the tree. If the stix code forces the register
--- to live in a pre-decided machine register, it comes out as @Fixed@;
--- otherwise, it comes out as @Any@, and the parent can decide which
--- register to put it in.
---
-data Register
- = Fixed Size Reg InstrBlock
- | Any Size (Reg -> InstrBlock)
-
-
-swizzleRegisterRep :: Register -> Size -> Register
-swizzleRegisterRep (Fixed _ reg code) size = Fixed size reg code
-swizzleRegisterRep (Any _ codefn) size = Any size codefn
-
-
--- | Grab the Reg for a CmmReg
-getRegisterReg :: CmmReg -> Reg
-
-getRegisterReg (CmmLocal (LocalReg u pk))
- = mkVReg u (cmmTypeSize pk)
-
-getRegisterReg (CmmGlobal mid)
- = case get_GlobalReg_reg_or_addr mid of
- Left (RealReg rrno) -> RealReg rrno
- _other -> pprPanic "getRegisterReg-memory" (ppr $ CmmGlobal mid)
- -- By this stage, the only MagicIds remaining should be the
- -- ones which map to a real machine register on this
- -- platform. Hence ...
-
-
--- | Memory addressing modes passed up the tree.
-data Amode
- = Amode AddrMode InstrBlock
-
{-
Now, given a tree (the argument to an CmmLoad) that references memory,
produce a suitable addressing mode.
-}
--- | Check whether an integer will fit in 32 bits.
--- A CmmInt is intended to be truncated to the appropriate
--- number of bits, so here we truncate it to Int64. This is
--- important because e.g. -1 as a CmmInt might be either
--- -1 or 18446744073709551615.
---
-is32BitInteger :: Integer -> Bool
-is32BitInteger i = i64 <= 0x7fffffff && i64 >= -0x80000000
- where i64 = fromIntegral i :: Int64
-
-- | Convert a BlockId to some CmmStatic data
jumpTableEntry :: Maybe BlockId -> CmmStatic
jumpTableEntry Nothing = CmmStaticLit (CmmInt 0 wordWidth)
-jumpTableEntry (Just (BlockId id)) = CmmStaticLit (CmmLabel blockLabel)
- where blockLabel = mkAsmTempLabel id
-
-
-
-
--- -----------------------------------------------------------------------------
--- General things for putting together code sequences
-
--- Expand CmmRegOff. ToDo: should we do it this way around, or convert
--- CmmExprs into CmmRegOff?
-mangleIndexTree :: CmmExpr -> CmmExpr
-mangleIndexTree (CmmRegOff reg off)
- = CmmMachOp (MO_Add width) [CmmReg reg, CmmLit (CmmInt (fromIntegral off) width)]
- where width = typeWidth (cmmRegType reg)
-
-
-assignMem_I64Code :: CmmExpr -> CmmExpr -> NatM InstrBlock
-assignMem_I64Code addrTree valueTree = do
- Amode _ addr_code <- getAmode addrTree
- ChildCode64 vcode rlo <- iselExpr64 valueTree
-
- (src, code) <- getSomeReg addrTree
- let
- rhi = getHiVRegFromLo rlo
- -- Big-endian store
- mov_hi = ST II32 rhi (AddrRegImm src (ImmInt 0))
- mov_lo = ST II32 rlo (AddrRegImm src (ImmInt 4))
-
- return (vcode `appOL` code `snocOL` mov_hi `snocOL` mov_lo)
-
-
-assignReg_I64Code :: CmmReg -> CmmExpr -> NatM InstrBlock
-assignReg_I64Code (CmmLocal (LocalReg u_dst pk)) valueTree = do
- ChildCode64 vcode r_src_lo <- iselExpr64 valueTree
- let
- r_dst_lo = mkVReg u_dst (cmmTypeSize pk)
- r_dst_hi = getHiVRegFromLo r_dst_lo
- r_src_hi = getHiVRegFromLo r_src_lo
- mov_lo = mkMOV r_src_lo r_dst_lo
- mov_hi = mkMOV r_src_hi r_dst_hi
- mkMOV sreg dreg = OR False g0 (RIReg sreg) dreg
- return (vcode `snocOL` mov_hi `snocOL` mov_lo)
-assignReg_I64Code lvalue valueTree
- = panic "assignReg_I64Code(sparc): invalid lvalue"
-
-
--- Load a 64 bit word
-iselExpr64 (CmmLoad addrTree ty)
- | isWord64 ty
- = do Amode amode addr_code <- getAmode addrTree
- let result
-
- | AddrRegReg r1 r2 <- amode
- = do rlo <- getNewRegNat II32
- tmp <- getNewRegNat II32
- let rhi = getHiVRegFromLo rlo
-
- return $ ChildCode64
- ( addr_code
- `appOL` toOL
- [ ADD False False r1 (RIReg r2) tmp
- , LD II32 (AddrRegImm tmp (ImmInt 0)) rhi
- , LD II32 (AddrRegImm tmp (ImmInt 4)) rlo ])
- rlo
-
- | AddrRegImm r1 (ImmInt i) <- amode
- = do rlo <- getNewRegNat II32
- let rhi = getHiVRegFromLo rlo
-
- return $ ChildCode64
- ( addr_code
- `appOL` toOL
- [ LD II32 (AddrRegImm r1 (ImmInt $ 0 + i)) rhi
- , LD II32 (AddrRegImm r1 (ImmInt $ 4 + i)) rlo ])
- rlo
-
- result
-
-
--- Add a literal to a 64 bit integer
-iselExpr64 (CmmMachOp (MO_Add _) [e1, CmmLit (CmmInt i _)])
- = do ChildCode64 code1 r1_lo <- iselExpr64 e1
- let r1_hi = getHiVRegFromLo r1_lo
-
- r_dst_lo <- getNewRegNat II32
- let r_dst_hi = getHiVRegFromLo r_dst_lo
-
- return $ ChildCode64
- ( toOL
- [ ADD False False r1_lo (RIImm (ImmInteger i)) r_dst_lo
- , ADD True False r1_hi (RIReg g0) r_dst_hi ])
- r_dst_lo
-
-
--- Addition of II64
-iselExpr64 (CmmMachOp (MO_Add width) [e1, e2])
- = do ChildCode64 code1 r1_lo <- iselExpr64 e1
- let r1_hi = getHiVRegFromLo r1_lo
-
- ChildCode64 code2 r2_lo <- iselExpr64 e2
- let r2_hi = getHiVRegFromLo r2_lo
-
- r_dst_lo <- getNewRegNat II32
- let r_dst_hi = getHiVRegFromLo r_dst_lo
-
- let code = code1
- `appOL` code2
- `appOL` toOL
- [ ADD False False r1_lo (RIReg r2_lo) r_dst_lo
- , ADD True False r1_hi (RIReg r2_hi) r_dst_hi ]
-
- return $ ChildCode64 code r_dst_lo
-
-
-iselExpr64 (CmmReg (CmmLocal (LocalReg uq ty))) | isWord64 ty = do
- r_dst_lo <- getNewRegNat II32
- let r_dst_hi = getHiVRegFromLo r_dst_lo
- r_src_lo = mkVReg uq II32
- r_src_hi = getHiVRegFromLo r_src_lo
- mov_lo = mkMOV r_src_lo r_dst_lo
- mov_hi = mkMOV r_src_hi r_dst_hi
- mkMOV sreg dreg = OR False g0 (RIReg sreg) dreg
- return (
- ChildCode64 (toOL [mov_hi, mov_lo]) r_dst_lo
- )
-
--- Convert something into II64
-iselExpr64 (CmmMachOp (MO_UU_Conv _ W64) [expr])
- = do
- r_dst_lo <- getNewRegNat II32
- let r_dst_hi = getHiVRegFromLo r_dst_lo
-
- -- compute expr and load it into r_dst_lo
- (a_reg, a_code) <- getSomeReg expr
-
- let code = a_code
- `appOL` toOL
- [ mkRegRegMoveInstr g0 r_dst_hi -- clear high 32 bits
- , mkRegRegMoveInstr a_reg r_dst_lo ]
-
- return $ ChildCode64 code r_dst_lo
-
-
-iselExpr64 expr
- = pprPanic "iselExpr64(sparc)" (ppr expr)
-
-
--- | The dual to getAnyReg: compute an expression into a register, but
--- we don't mind which one it is.
-getSomeReg :: CmmExpr -> NatM (Reg, InstrBlock)
-getSomeReg expr = do
- r <- getRegister expr
- case r of
- Any rep code -> do
- tmp <- getNewRegNat rep
- return (tmp, code tmp)
- Fixed _ reg code ->
- return (reg, code)
-
-
---
-getRegister :: CmmExpr -> NatM Register
-
-getRegister (CmmReg reg)
- = return (Fixed (cmmTypeSize (cmmRegType reg))
- (getRegisterReg reg) nilOL)
-
-getRegister tree@(CmmRegOff _ _)
- = getRegister (mangleIndexTree tree)
-
-getRegister (CmmMachOp (MO_UU_Conv W64 W32)
- [CmmMachOp (MO_U_Shr W64) [x,CmmLit (CmmInt 32 _)]]) = do
- ChildCode64 code rlo <- iselExpr64 x
- return $ Fixed II32 (getHiVRegFromLo rlo) code
-
-getRegister (CmmMachOp (MO_SS_Conv W64 W32)
- [CmmMachOp (MO_U_Shr W64) [x,CmmLit (CmmInt 32 _)]]) = do
- ChildCode64 code rlo <- iselExpr64 x
- return $ Fixed II32 (getHiVRegFromLo rlo) code
-
-getRegister (CmmMachOp (MO_UU_Conv W64 W32) [x]) = do
- ChildCode64 code rlo <- iselExpr64 x
- return $ Fixed II32 rlo code
-
-getRegister (CmmMachOp (MO_SS_Conv W64 W32) [x]) = do
- ChildCode64 code rlo <- iselExpr64 x
- return $ Fixed II32 rlo code
-
-
-
--- Load a literal float into a float register.
--- The actual literal is stored in a new data area, and we load it
--- at runtime.
-getRegister (CmmLit (CmmFloat f W32)) = do
-
- -- a label for the new data area
- lbl <- getNewLabelNat
- tmp <- getNewRegNat II32
-
- let code dst = toOL [
- -- the data area
- LDATA ReadOnlyData
- [CmmDataLabel lbl,
- CmmStaticLit (CmmFloat f W32)],
-
- -- load the literal
- SETHI (HI (ImmCLbl lbl)) tmp,
- LD II32 (AddrRegImm tmp (LO (ImmCLbl lbl))) dst]
-
- return (Any FF32 code)
-
-getRegister (CmmLit (CmmFloat d W64)) = do
- lbl <- getNewLabelNat
- tmp <- getNewRegNat II32
- let code dst = toOL [
- LDATA ReadOnlyData
- [CmmDataLabel lbl,
- CmmStaticLit (CmmFloat d W64)],
- SETHI (HI (ImmCLbl lbl)) tmp,
- LD II64 (AddrRegImm tmp (LO (ImmCLbl lbl))) dst]
- return (Any FF64 code)
-
-getRegister (CmmMachOp mop [x]) -- unary MachOps
- = case mop of
- MO_F_Neg W32 -> trivialUFCode FF32 (FNEG FF32) x
- MO_F_Neg W64 -> trivialUFCode FF64 (FNEG FF64) x
-
- MO_S_Neg rep -> trivialUCode (intSize rep) (SUB False False g0) x
- MO_Not rep -> trivialUCode (intSize rep) (XNOR False g0) x
-
- MO_FF_Conv W64 W32-> coerceDbl2Flt x
- MO_FF_Conv W32 W64-> coerceFlt2Dbl x
-
- MO_FS_Conv from to -> coerceFP2Int from to x
- MO_SF_Conv from to -> coerceInt2FP from to x
-
- -- Conversions which are a nop on sparc
- MO_UU_Conv from to
- | from == to -> conversionNop (intSize to) x
- MO_UU_Conv W32 W8 -> trivialCode W8 (AND False) x (CmmLit (CmmInt 255 W8))
- MO_UU_Conv W32 to -> conversionNop (intSize to) x
- MO_SS_Conv W32 to -> conversionNop (intSize to) x
-
- MO_UU_Conv W8 to@W32 -> conversionNop (intSize to) x
- MO_UU_Conv W16 to@W32 -> conversionNop (intSize to) x
- MO_UU_Conv W8 to@W16 -> conversionNop (intSize to) x
-
- -- sign extension
- MO_SS_Conv W8 W32 -> integerExtend W8 W32 x
- MO_SS_Conv W16 W32 -> integerExtend W16 W32 x
- MO_SS_Conv W8 W16 -> integerExtend W8 W16 x
-
- other_op -> panic ("Unknown unary mach op: " ++ show mop)
- where
-
- -- | sign extend and widen
- integerExtend
- :: Width -- ^ width of source expression
- -> Width -- ^ width of result
- -> CmmExpr -- ^ source expression
- -> NatM Register
-
- integerExtend from to expr
- = do -- load the expr into some register
- (reg, e_code) <- getSomeReg expr
- tmp <- getNewRegNat II32
- let bitCount
- = case (from, to) of
- (W8, W32) -> 24
- (W16, W32) -> 16
- (W8, W16) -> 24
- let code dst
- = e_code
-
- -- local shift word left to load the sign bit
- `snocOL` SLL reg (RIImm (ImmInt bitCount)) tmp
-
- -- arithmetic shift right to sign extend
- `snocOL` SRA tmp (RIImm (ImmInt bitCount)) dst
-
- return (Any (intSize to) code)
-
-
- conversionNop new_rep expr
- = do e_code <- getRegister expr
- return (swizzleRegisterRep e_code new_rep)
-
-getRegister (CmmMachOp mop [x, y]) -- dyadic PrimOps
- = case mop of
- MO_Eq rep -> condIntReg EQQ x y
- MO_Ne rep -> condIntReg NE x y
-
- MO_S_Gt rep -> condIntReg GTT x y
- MO_S_Ge rep -> condIntReg GE x y
- MO_S_Lt rep -> condIntReg LTT x y
- MO_S_Le rep -> condIntReg LE x y
-
- MO_U_Gt W32 -> condIntReg GTT x y
- MO_U_Ge W32 -> condIntReg GE x y
- MO_U_Lt W32 -> condIntReg LTT x y
- MO_U_Le W32 -> condIntReg LE x y
-
- MO_U_Gt W16 -> condIntReg GU x y
- MO_U_Ge W16 -> condIntReg GEU x y
- MO_U_Lt W16 -> condIntReg LU x y
- MO_U_Le W16 -> condIntReg LEU x y
-
- MO_Add W32 -> trivialCode W32 (ADD False False) x y
- MO_Sub W32 -> trivialCode W32 (SUB False False) x y
-
- MO_S_MulMayOflo rep -> imulMayOflo rep x y
-
- MO_S_Quot W32 -> idiv True False x y
- MO_U_Quot W32 -> idiv False False x y
-
- MO_S_Rem W32 -> irem True x y
- MO_U_Rem W32 -> irem False x y
-
- MO_F_Eq w -> condFltReg EQQ x y
- MO_F_Ne w -> condFltReg NE x y
-
- MO_F_Gt w -> condFltReg GTT x y
- MO_F_Ge w -> condFltReg GE x y
- MO_F_Lt w -> condFltReg LTT x y
- MO_F_Le w -> condFltReg LE x y
-
- MO_F_Add w -> trivialFCode w FADD x y
- MO_F_Sub w -> trivialFCode w FSUB x y
- MO_F_Mul w -> trivialFCode w FMUL x y
- MO_F_Quot w -> trivialFCode w FDIV x y
-
- MO_And rep -> trivialCode rep (AND False) x y
- MO_Or rep -> trivialCode rep (OR False) x y
- MO_Xor rep -> trivialCode rep (XOR False) x y
-
- MO_Mul rep -> trivialCode rep (SMUL False) x y
-
- MO_Shl rep -> trivialCode rep SLL x y
- MO_U_Shr rep -> trivialCode rep SRL x y
- MO_S_Shr rep -> trivialCode rep SRA x y
-
-{-
- MO_F32_Pwr -> getRegister (StCall (Left (fsLit "pow")) CCallConv FF64
- [promote x, promote y])
- where promote x = CmmMachOp MO_F32_to_Dbl [x]
- MO_F64_Pwr -> getRegister (StCall (Left (fsLit "pow")) CCallConv FF64
- [x, y])
--}
- other -> pprPanic "getRegister(sparc) - binary CmmMachOp (1)" (pprMachOp mop)
- where
- -- idiv fn x y = getRegister (StCall (Left fn) CCallConv II32 [x, y])
-
-
- -- | Generate an integer division instruction.
- idiv :: Bool -> Bool -> CmmExpr -> CmmExpr -> NatM Register
-
- -- For unsigned division with a 32 bit numerator,
- -- we can just clear the Y register.
- idiv False cc x y = do
- (a_reg, a_code) <- getSomeReg x
- (b_reg, b_code) <- getSomeReg y
-
- let code dst
- = a_code
- `appOL` b_code
- `appOL` toOL
- [ WRY g0 g0
- , UDIV cc a_reg (RIReg b_reg) dst]
-
- return (Any II32 code)
-
-
- -- For _signed_ division with a 32 bit numerator,
- -- we have to sign extend the numerator into the Y register.
- idiv True cc x y = do
- (a_reg, a_code) <- getSomeReg x
- (b_reg, b_code) <- getSomeReg y
-
- tmp <- getNewRegNat II32
-
- let code dst
- = a_code
- `appOL` b_code
- `appOL` toOL
- [ SRA a_reg (RIImm (ImmInt 16)) tmp -- sign extend
- , SRA tmp (RIImm (ImmInt 16)) tmp
-
- , WRY tmp g0
- , SDIV cc a_reg (RIReg b_reg) dst]
-
- return (Any II32 code)
-
-
- -- | Do an integer remainder.
- --
- -- NOTE: The SPARC v8 architecture manual says that integer division
- -- instructions _may_ generate a remainder, depending on the implementation.
- -- If so it is _recommended_ that the remainder is placed in the Y register.
- --
- -- The UltraSparc 2007 manual says Y is _undefined_ after division.
- --
- -- The SPARC T2 doesn't store the remainder, not sure about the others.
- -- It's probably best not to worry about it, and just generate our own
- -- remainders.
- --
- irem :: Bool -> CmmExpr -> CmmExpr -> NatM Register
-
- -- For unsigned operands:
- -- Division is between a 64 bit numerator and a 32 bit denominator,
- -- so we still have to clear the Y register.
- irem False x y = do
- (a_reg, a_code) <- getSomeReg x
- (b_reg, b_code) <- getSomeReg y
-
- tmp_reg <- getNewRegNat II32
-
- let code dst
- = a_code
- `appOL` b_code
- `appOL` toOL
- [ WRY g0 g0
- , UDIV False a_reg (RIReg b_reg) tmp_reg
- , UMUL False tmp_reg (RIReg b_reg) tmp_reg
- , SUB False False a_reg (RIReg tmp_reg) dst]
-
- return (Any II32 code)
-
-
- -- For signed operands:
- -- Make sure to sign extend into the Y register, or the remainder
- -- will have the wrong sign when the numerator is negative.
- --
- -- TODO: When sign extending, GCC only shifts the a_reg right by 17 bits,
- -- not the full 32. Not sure why this is, something to do with overflow?
- -- If anyone cares enough about the speed of signed remainder they
- -- can work it out themselves (then tell me). -- BL 2009/01/20
-
- irem True x y = do
- (a_reg, a_code) <- getSomeReg x
- (b_reg, b_code) <- getSomeReg y
-
- tmp1_reg <- getNewRegNat II32
- tmp2_reg <- getNewRegNat II32
-
- let code dst
- = a_code
- `appOL` b_code
- `appOL` toOL
- [ SRA a_reg (RIImm (ImmInt 16)) tmp1_reg -- sign extend
- , SRA tmp1_reg (RIImm (ImmInt 16)) tmp1_reg -- sign extend
- , WRY tmp1_reg g0
-
- , SDIV False a_reg (RIReg b_reg) tmp2_reg
- , SMUL False tmp2_reg (RIReg b_reg) tmp2_reg
- , SUB False False a_reg (RIReg tmp2_reg) dst]
-
- return (Any II32 code)
-
-
- imulMayOflo :: Width -> CmmExpr -> CmmExpr -> NatM Register
- imulMayOflo rep a b = do
- (a_reg, a_code) <- getSomeReg a
- (b_reg, b_code) <- getSomeReg b
- res_lo <- getNewRegNat II32
- res_hi <- getNewRegNat II32
- let
- shift_amt = case rep of
- W32 -> 31
- W64 -> 63
- _ -> panic "shift_amt"
- code dst = a_code `appOL` b_code `appOL`
- toOL [
- SMUL False a_reg (RIReg b_reg) res_lo,
- RDY res_hi,
- SRA res_lo (RIImm (ImmInt shift_amt)) res_lo,
- SUB False False res_lo (RIReg res_hi) dst
- ]
- return (Any II32 code)
-
-getRegister (CmmLoad mem pk) = do
- Amode src code <- getAmode mem
- let
- code__2 dst = code `snocOL` LD (cmmTypeSize pk) src dst
- return (Any (cmmTypeSize pk) code__2)
-
-getRegister (CmmLit (CmmInt i _))
- | fits13Bits i
- = let
- src = ImmInt (fromInteger i)
- code dst = unitOL (OR False g0 (RIImm src) dst)
- in
- return (Any II32 code)
-
-getRegister (CmmLit lit)
- = let rep = cmmLitType lit
- imm = litToImm lit
- code dst = toOL [
- SETHI (HI imm) dst,
- OR False dst (RIImm (LO imm)) dst]
- in return (Any II32 code)
-
-
-
-getAmode :: CmmExpr -> NatM Amode
-getAmode tree@(CmmRegOff _ _) = getAmode (mangleIndexTree tree)
-
-getAmode (CmmMachOp (MO_Sub rep) [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 rep) [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 rep) [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)
-
-
-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 rep -> condIntCode EQQ x y
- MO_Ne rep -> condIntCode NE x y
-
- MO_S_Gt rep -> condIntCode GTT x y
- MO_S_Ge rep -> condIntCode GE x y
- MO_S_Lt rep -> condIntCode LTT x y
- MO_S_Le rep -> condIntCode LE x y
-
- MO_U_Gt rep -> condIntCode GU x y
- MO_U_Ge rep -> condIntCode GEU x y
- MO_U_Lt rep -> condIntCode LU x y
- MO_U_Le rep -> condIntCode LEU x y
-
- other -> pprPanic "getCondCode(x86,x86_64,sparc)" (ppr (CmmMachOp mop [x,y]))
-
-getCondCode other = pprPanic "getCondCode(2)(x86,sparc)" (ppr 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 rep))
- | 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)
+jumpTableEntry (Just blockid) = CmmStaticLit (CmmLabel blockLabel)
+ where blockLabel = mkAsmTempLabel (getUnique blockid)
assignReg_IntCode :: Size -> CmmReg -> CmmExpr -> NatM InstrBlock
-assignReg_IntCode pk reg src = do
+assignReg_IntCode _ reg src = do
r <- getRegister src
return $ case r of
Any _ code -> code dst
-- -----------------------------------------------------------------------------
--- Generating C calls
-
--- Now the biggest nightmare---calls. Most of the nastiness is buried in
--- @get_arg@, which moves the arguments to the correct registers/stack
--- locations. Apart from that, the code is easy.
---
--- (If applicable) Do not fill the delay slots here; you will confuse the
--- register allocator.
-
-genCCall
- :: CmmCallTarget -- function to call
- -> HintedCmmFormals -- where to put the result
- -> HintedCmmActuals -- arguments (of mixed type)
- -> NatM InstrBlock
-
-
--- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-{-
- The SPARC calling convention is an absolute
- nightmare. The first 6x32 bits of arguments are mapped into
- %o0 through %o5, and the remaining arguments are dumped to the
- stack, beginning at [%sp+92]. (Note that %o6 == %sp.)
-
- If we have to put args on the stack, move %o6==%sp down by
- the number of words to go on the stack, to ensure there's enough space.
-
- According to Fraser and Hanson's lcc book, page 478, fig 17.2,
- 16 words above the stack pointer is a word for the address of
- a structure return value. I use this as a temporary location
- for moving values from float to int regs. Certainly it isn't
- safe to put anything in the 16 words starting at %sp, since
- this area can get trashed at any time due to window overflows
- caused by signal handlers.
-
- A final complication (if the above isn't enough) is that
- we can't blithely calculate the arguments one by one into
- %o0 .. %o5. Consider the following nested calls:
-
- fff a (fff b c)
-
- Naive code moves a into %o0, and (fff b c) into %o1. Unfortunately
- the inner call will itself use %o0, which trashes the value put there
- in preparation for the outer call. Upshot: we need to calculate the
- args into temporary regs, and move those to arg regs or onto the
- stack only immediately prior to the call proper. Sigh.
-
-genCCall
- :: CmmCallTarget -- function to call
- -> HintedCmmFormals -- where to put the result
- -> HintedCmmActuals -- arguments (of mixed type)
- -> NatM InstrBlock
-
--}
-
-
--- On SPARC under TSO (Total Store Ordering), writes earlier in the instruction stream
--- are guaranteed to take place before writes afterwards (unlike on PowerPC).
--- Ref: Section 8.4 of the SPARC V9 Architecture manual.
---
--- In the SPARC case we don't need a barrier.
---
-genCCall (CmmPrim (MO_WriteBarrier)) _ _
- = do return nilOL
-
-genCCall target dest_regs argsAndHints
- = do
- -- strip hints from the arg regs
- let args :: [CmmExpr]
- args = map hintlessCmm argsAndHints
-
-
- -- work out the arguments, and assign them to integer regs
- argcode_and_vregs <- mapM arg_to_int_vregs args
- let (argcodes, vregss) = unzip argcode_and_vregs
- let vregs = concat vregss
-
- let n_argRegs = length allArgRegs
- let n_argRegs_used = min (length vregs) n_argRegs
-
-
- -- deal with static vs dynamic call targets
- callinsns <- case target of
- CmmCallee (CmmLit (CmmLabel lbl)) conv ->
- return (unitOL (CALL (Left (litToImm (CmmLabel lbl))) n_argRegs_used False))
-
- CmmCallee expr conv
- -> do (dyn_c, [dyn_r]) <- arg_to_int_vregs expr
- return (dyn_c `snocOL` CALL (Right dyn_r) n_argRegs_used False)
-
- CmmPrim mop
- -> do res <- outOfLineFloatOp mop
- lblOrMopExpr <- case res of
- Left lbl -> do
- return (unitOL (CALL (Left (litToImm (CmmLabel lbl))) n_argRegs_used False))
-
- Right mopExpr -> do
- (dyn_c, [dyn_r]) <- arg_to_int_vregs mopExpr
- return (dyn_c `snocOL` CALL (Right dyn_r) n_argRegs_used False)
-
- return lblOrMopExpr
-
- let argcode = concatOL argcodes
-
- let (move_sp_down, move_sp_up)
- = let diff = length vregs - n_argRegs
- nn = if odd diff then diff + 1 else diff -- keep 8-byte alignment
- in if nn <= 0
- then (nilOL, nilOL)
- else (unitOL (moveSp (-1*nn)), unitOL (moveSp (1*nn)))
-
- let transfer_code
- = toOL (move_final vregs allArgRegs eXTRA_STK_ARGS_HERE)
-
- return
- $ argcode `appOL`
- move_sp_down `appOL`
- transfer_code `appOL`
- callinsns `appOL`
- unitOL NOP `appOL`
- move_sp_up `appOL`
- assign_code dest_regs
-
-
--- | Generate code to calculate an argument, and move it into one
--- or two integer vregs.
-arg_to_int_vregs :: CmmExpr -> NatM (OrdList Instr, [Reg])
-arg_to_int_vregs arg
-
- -- If the expr produces a 64 bit int, then we can just use iselExpr64
- | isWord64 (cmmExprType arg)
- = do (ChildCode64 code r_lo) <- iselExpr64 arg
- let r_hi = getHiVRegFromLo r_lo
- return (code, [r_hi, r_lo])
-
- | otherwise
- = do (src, code) <- getSomeReg arg
- tmp <- getNewRegNat (cmmTypeSize $ cmmExprType arg)
- let pk = cmmExprType arg
-
- case cmmTypeSize pk of
-
- -- Load a 64 bit float return value into two integer regs.
- FF64 -> do
- v1 <- getNewRegNat II32
- v2 <- getNewRegNat II32
-
- let Just f0_high = fPair f0
-
- let code2 =
- code `snocOL`
- FMOV FF64 src f0 `snocOL`
- ST FF32 f0 (spRel 16) `snocOL`
- LD II32 (spRel 16) v1 `snocOL`
- ST FF32 f0_high (spRel 16) `snocOL`
- LD II32 (spRel 16) v2
-
- return (code2, [v1,v2])
-
- -- Load a 32 bit float return value into an integer reg
- FF32 -> do
- v1 <- getNewRegNat II32
-
- let code2 =
- code `snocOL`
- ST FF32 src (spRel 16) `snocOL`
- LD II32 (spRel 16) v1
-
- return (code2, [v1])
-
- -- Move an integer return value into its destination reg.
- other -> do
- v1 <- getNewRegNat II32
-
- let code2 =
- code `snocOL`
- OR False g0 (RIReg src) v1
-
- return (code2, [v1])
-
-
--- | Move args from the integer vregs into which they have been
--- marshalled, into %o0 .. %o5, and the rest onto the stack.
---
-move_final :: [Reg] -> [Reg] -> Int -> [Instr]
-
--- all args done
-move_final [] _ offset
- = []
-
--- out of aregs; move to stack
-move_final (v:vs) [] offset
- = ST II32 v (spRel offset)
- : move_final vs [] (offset+1)
-
--- move into an arg (%o[0..5]) reg
-move_final (v:vs) (a:az) offset
- = OR False g0 (RIReg v) a
- : move_final vs az offset
-
-
--- | Assign results returned from the call into their
--- desination regs.
---
-assign_code :: [CmmHinted LocalReg] -> OrdList Instr
-assign_code [] = nilOL
-
-assign_code [CmmHinted dest _hint]
- = let rep = localRegType dest
- width = typeWidth rep
- r_dest = getRegisterReg (CmmLocal dest)
-
- result
- | isFloatType rep
- , W32 <- width
- = unitOL $ FMOV FF32 (RealReg $ fReg 0) r_dest
-
- | isFloatType rep
- , W64 <- width
- = unitOL $ FMOV FF64 (RealReg $ fReg 0) r_dest
-
- | not $ isFloatType rep
- , W32 <- width
- = unitOL $ mkRegRegMoveInstr (RealReg $ oReg 0) r_dest
-
- | not $ isFloatType rep
- , W64 <- width
- , r_dest_hi <- getHiVRegFromLo r_dest
- = toOL [ mkRegRegMoveInstr (RealReg $ oReg 0) r_dest_hi
- , mkRegRegMoveInstr (RealReg $ oReg 1) r_dest]
- in result
-
-
--- | Generate a call to implement an out-of-line floating point operation
-outOfLineFloatOp
- :: CallishMachOp
- -> NatM (Either CLabel CmmExpr)
-
-outOfLineFloatOp mop
- = do let functionName
- = outOfLineFloatOp_table mop
-
- dflags <- getDynFlagsNat
- mopExpr <- cmmMakeDynamicReference dflags addImportNat CallReference
- $ mkForeignLabel functionName Nothing True IsFunction
-
- let mopLabelOrExpr
- = case mopExpr of
- CmmLit (CmmLabel lbl) -> Left lbl
- _ -> Right mopExpr
-
- return mopLabelOrExpr
-
-
--- | Decide what C function to use to implement a CallishMachOp
---
-outOfLineFloatOp_table
- :: CallishMachOp
- -> FastString
-
-outOfLineFloatOp_table mop
- = case mop of
- MO_F32_Exp -> fsLit "expf"
- MO_F32_Log -> fsLit "logf"
- MO_F32_Sqrt -> fsLit "sqrtf"
- MO_F32_Pwr -> fsLit "powf"
-
- MO_F32_Sin -> fsLit "sinf"
- MO_F32_Cos -> fsLit "cosf"
- MO_F32_Tan -> fsLit "tanf"
-
- MO_F32_Asin -> fsLit "asinf"
- MO_F32_Acos -> fsLit "acosf"
- MO_F32_Atan -> fsLit "atanf"
-
- MO_F32_Sinh -> fsLit "sinhf"
- MO_F32_Cosh -> fsLit "coshf"
- MO_F32_Tanh -> fsLit "tanhf"
-
- MO_F64_Exp -> fsLit "exp"
- MO_F64_Log -> fsLit "log"
- MO_F64_Sqrt -> fsLit "sqrt"
- MO_F64_Pwr -> fsLit "pow"
-
- MO_F64_Sin -> fsLit "sin"
- MO_F64_Cos -> fsLit "cos"
- MO_F64_Tan -> fsLit "tan"
-
- MO_F64_Asin -> fsLit "asin"
- MO_F64_Acos -> fsLit "acos"
- MO_F64_Atan -> fsLit "atan"
-
- MO_F64_Sinh -> fsLit "sinh"
- MO_F64_Cosh -> fsLit "cosh"
- MO_F64_Tanh -> fsLit "tanh"
-
- other -> pprPanic "outOfLineFloatOp(sparc): Unknown callish mach op "
- (pprCallishMachOp mop)
-
-
--- -----------------------------------------------------------------------------
-- Generating a table-branch
genSwitch :: CmmExpr -> [Maybe BlockId] -> NatM InstrBlock
dst <- getNewRegNat II32
label <- getNewLabelNat
- let jumpTable = map jumpTableEntry ids
return $ e_code `appOL`
toOL
- -- the jump table
- [ LDATA ReadOnlyData (CmmDataLabel label : jumpTable)
-
- -- load base of jump table
- , SETHI (HI (ImmCLbl label)) base_reg
+ [ -- load base of jump table
+ SETHI (HI (ImmCLbl label)) base_reg
, OR False base_reg (RIImm $ LO $ ImmCLbl label) base_reg
-- the addrs in the table are 32 bits wide..
-- load and jump to the destination
, LD II32 (AddrRegReg base_reg offset_reg) dst
- , JMP_TBL (AddrRegImm dst (ImmInt 0)) [i | Just i <- ids]
+ , JMP_TBL (AddrRegImm dst (ImmInt 0)) ids label
, NOP ]
-
-
--- -----------------------------------------------------------------------------
--- 'condIntReg' and 'condFltReg': condition codes into registers
-
--- Turn those condition codes into integers now (when they appear on
--- the right hand side of an assignment).
---
--- (If applicable) Do not fill the delay slots here; you will confuse the
--- register allocator.
-
-condIntReg, condFltReg :: Cond -> CmmExpr -> CmmExpr -> NatM Register
-
-condIntReg EQQ x (CmmLit (CmmInt 0 d)) = do
- (src, code) <- getSomeReg x
- tmp <- getNewRegNat II32
- let
- code__2 dst = code `appOL` toOL [
- SUB False True g0 (RIReg src) g0,
- SUB True False g0 (RIImm (ImmInt (-1))) dst]
- return (Any II32 code__2)
-
-condIntReg EQQ x y = do
- (src1, code1) <- getSomeReg x
- (src2, code2) <- getSomeReg y
- tmp1 <- getNewRegNat II32
- tmp2 <- getNewRegNat II32
- let
- code__2 dst = code1 `appOL` code2 `appOL` toOL [
- XOR False src1 (RIReg src2) dst,
- SUB False True g0 (RIReg dst) g0,
- SUB True False g0 (RIImm (ImmInt (-1))) dst]
- return (Any II32 code__2)
-
-condIntReg NE x (CmmLit (CmmInt 0 d)) = do
- (src, code) <- getSomeReg x
- tmp <- getNewRegNat II32
- let
- code__2 dst = code `appOL` toOL [
- SUB False True g0 (RIReg src) g0,
- ADD True False g0 (RIImm (ImmInt 0)) dst]
- return (Any II32 code__2)
-
-condIntReg NE x y = do
- (src1, code1) <- getSomeReg x
- (src2, code2) <- getSomeReg y
- tmp1 <- getNewRegNat II32
- tmp2 <- getNewRegNat II32
- let
- code__2 dst = code1 `appOL` code2 `appOL` toOL [
- XOR False src1 (RIReg src2) dst,
- SUB False True g0 (RIReg dst) g0,
- ADD True False g0 (RIImm (ImmInt 0)) dst]
- return (Any II32 code__2)
-
-condIntReg cond x y = do
- bid1@(BlockId lbl1) <- getBlockIdNat
- bid2@(BlockId lbl2) <- getBlockIdNat
- CondCode _ cond cond_code <- condIntCode cond x y
- let
- code__2 dst = cond_code `appOL` toOL [
- BI cond False bid1, NOP,
- OR False g0 (RIImm (ImmInt 0)) dst,
- BI ALWAYS False bid2, NOP,
- NEWBLOCK bid1,
- OR False g0 (RIImm (ImmInt 1)) dst,
- NEWBLOCK bid2]
- return (Any II32 code__2)
-
-condFltReg cond x y = do
- bid1@(BlockId lbl1) <- getBlockIdNat
- bid2@(BlockId lbl2) <- getBlockIdNat
- CondCode _ cond cond_code <- condFltCode cond x y
- let
- code__2 dst = cond_code `appOL` toOL [
- NOP,
- BF cond False bid1, NOP,
- OR False g0 (RIImm (ImmInt 0)) dst,
- BI ALWAYS False bid2, NOP,
- NEWBLOCK bid1,
- OR False g0 (RIImm (ImmInt 1)) dst,
- NEWBLOCK bid2]
- return (Any II32 code__2)
-
-
-
--- -----------------------------------------------------------------------------
--- 'trivial*Code': deal with trivial instructions
-
--- Trivial (dyadic: 'trivialCode', floating-point: 'trivialFCode',
--- unary: 'trivialUCode', unary fl-pt:'trivialUFCode') instructions.
--- Only look for constants on the right hand side, because that's
--- where the generic optimizer will have put them.
-
--- Similarly, for unary instructions, we don't have to worry about
--- matching an StInt as the argument, because genericOpt will already
--- have handled the constant-folding.
-
-trivialCode pk instr x (CmmLit (CmmInt y d))
- | fits13Bits y
- = do
- (src1, code) <- getSomeReg x
- tmp <- getNewRegNat II32
- let
- src2 = ImmInt (fromInteger y)
- code__2 dst = code `snocOL` instr src1 (RIImm src2) dst
- return (Any II32 code__2)
-
-trivialCode pk instr x y = do
- (src1, code1) <- getSomeReg x
- (src2, code2) <- getSomeReg y
- tmp1 <- getNewRegNat II32
- tmp2 <- getNewRegNat II32
- let
- code__2 dst = code1 `appOL` code2 `snocOL`
- instr src1 (RIReg src2) dst
- return (Any II32 code__2)
-
-------------
-trivialFCode pk instr x y = do
- (src1, code1) <- getSomeReg x
- (src2, code2) <- getSomeReg y
- tmp1 <- getNewRegNat (cmmTypeSize $ cmmExprType x)
- tmp2 <- getNewRegNat (cmmTypeSize $ cmmExprType y)
- tmp <- getNewRegNat FF64
- let
- promote x = FxTOy FF32 FF64 x tmp
-
- pk1 = cmmExprType x
- pk2 = cmmExprType y
-
- code__2 dst =
- if pk1 `cmmEqType` pk2 then
- code1 `appOL` code2 `snocOL`
- instr (floatSize pk) src1 src2 dst
- else if typeWidth pk1 == W32 then
- code1 `snocOL` promote src1 `appOL` code2 `snocOL`
- instr FF64 tmp src2 dst
- else
- code1 `appOL` code2 `snocOL` promote src2 `snocOL`
- instr FF64 src1 tmp dst
- return (Any (cmmTypeSize $ if pk1 `cmmEqType` pk2 then pk1 else cmmFloat W64)
- code__2)
-
-------------
-trivialUCode size instr x = do
- (src, code) <- getSomeReg x
- tmp <- getNewRegNat size
- let
- code__2 dst = code `snocOL` instr (RIReg src) dst
- return (Any size code__2)
-
--------------
-trivialUFCode pk instr x = do
- (src, code) <- getSomeReg x
- tmp <- getNewRegNat pk
- let
- code__2 dst = code `snocOL` instr src dst
- return (Any pk code__2)
-
-
-
-coerceDbl2Flt :: CmmExpr -> NatM Register
-coerceFlt2Dbl :: CmmExpr -> NatM Register
-
-
-coerceInt2FP width1 width2 x = do
- (src, code) <- getSomeReg x
- let
- code__2 dst = code `appOL` toOL [
- ST (intSize width1) src (spRel (-2)),
- LD (intSize width1) (spRel (-2)) dst,
- FxTOy (intSize width1) (floatSize width2) dst dst]
- return (Any (floatSize $ width2) code__2)
-
-
--- | Coerce a floating point value to integer
---
--- NOTE: On sparc v9 there are no instructions to move a value from an
--- FP register directly to an int register, so we have to use a load/store.
---
-coerceFP2Int width1 width2 x
- = do let fsize1 = floatSize width1
- fsize2 = floatSize width2
-
- isize2 = intSize width2
-
- (fsrc, code) <- getSomeReg x
- fdst <- getNewRegNat fsize2
-
- let code2 dst
- = code
- `appOL` toOL
- -- convert float to int format, leaving it in a float reg.
- [ FxTOy fsize1 isize2 fsrc fdst
-
- -- store the int into mem, then load it back to move
- -- it into an actual int reg.
- , ST fsize2 fdst (spRel (-2))
- , LD isize2 (spRel (-2)) dst]
-
- return (Any isize2 code2)
-
-------------
-coerceDbl2Flt x = do
- (src, code) <- getSomeReg x
- return (Any FF32 (\dst -> code `snocOL` FxTOy FF64 FF32 src dst))
-
-------------
-coerceFlt2Dbl x = do
- (src, code) <- getSomeReg x
- return (Any FF64 (\dst -> code `snocOL` FxTOy FF32 FF64 src dst))
-
-
-
--- eXTRA_STK_ARGS_HERE
-
--- We (allegedly) put the first six C-call arguments in registers;
--- where do we start putting the rest of them?
-
--- Moved from Instrs (SDM):
-
-eXTRA_STK_ARGS_HERE :: Int
-eXTRA_STK_ARGS_HERE
- = 23
+generateJumpTableForInstr :: Instr -> Maybe (NatCmmTop Instr)
+generateJumpTableForInstr (JMP_TBL _ ids label) =
+ let jumpTable = map jumpTableEntry ids
+ in Just (CmmData ReadOnlyData (CmmDataLabel label : jumpTable))
+generateJumpTableForInstr _ = Nothing
projects / ghc-hetmet.git / blobdiff