X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fcmm%2FCmmCallConv.hs;h=a49fa65ab4a2d20d0da73083a5f0c5697bd9aa36;hp=5476eb8fa2c0ab660bf1198042489dd9525b8d0f;hb=703ca1542c8e0983cc9d8eebce6e9f3dd3fd71e2;hpb=176fa33f17dd78355cc572e006d2ab26898e2c69 diff --git a/compiler/cmm/CmmCallConv.hs b/compiler/cmm/CmmCallConv.hs index 5476eb8..a49fa65 100644 --- a/compiler/cmm/CmmCallConv.hs +++ b/compiler/cmm/CmmCallConv.hs @@ -1,10 +1,3 @@ -{-# 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/CodingStyle#Warnings --- for details - module CmmCallConv ( ParamLocation(..), ArgumentFormat, @@ -17,11 +10,11 @@ module CmmCallConv ( import Cmm import SMRep +import ZipCfgCmmRep (Convention(..)) import Constants import StaticFlags (opt_Unregisterised) import Outputable -import Panic -- Calculate the 'GlobalReg' or stack locations for function call -- parameters as used by the Cmm calling convention. @@ -30,36 +23,50 @@ data ParamLocation a = RegisterParam GlobalReg | StackParam a +instance (Outputable a) => Outputable (ParamLocation a) where + ppr (RegisterParam g) = ppr g + ppr (StackParam p) = ppr p + type ArgumentFormat a b = [(a, ParamLocation b)] -- Stack parameters are returned as word offsets. assignArguments :: (a -> CmmType) -> [a] -> ArgumentFormat a WordOff assignArguments f reps = assignments where + availRegs = getRegsWithNode (sizes, assignments) = unzip $ assignArguments' reps (negate (sum sizes)) availRegs - assignArguments' [] offset availRegs = [] + assignArguments' [] _ _ = [] assignArguments' (r:rs) offset availRegs = (size,(r,assignment)):assignArguments' rs new_offset remaining where (assignment, new_offset, size, remaining) = - assign_reg False assign_slot_up (f r) offset availRegs + assign_reg assign_slot_neg (f r) offset availRegs -- | JD: For the new stack story, I want arguments passed on the stack to manifest as -- positive offsets in a CallArea, not negative offsets from the stack pointer. -- Also, I want byte offsets, not word offsets. --- The first argument tells us whether we are assigning positions for call arguments --- or return results. The distinction matters because we reserve different --- global registers in each case. -assignArgumentsPos :: Bool -> (a -> CmmType) -> [a] -> ArgumentFormat a ByteOff -assignArgumentsPos isCall arg_ty reps = map cvt assignments - where - (sizes, assignments) = unzip $ assignArguments' reps 0 availRegs +assignArgumentsPos :: (Outputable a) => Convention -> (a -> CmmType) -> [a] -> + ArgumentFormat a ByteOff +assignArgumentsPos conv arg_ty reps = map cvt assignments + where -- The calling conventions (CgCallConv.hs) are complicated, to say the least + regs = case (reps, conv) of + (_, NativeNodeCall) -> getRegsWithNode + (_, NativeDirectCall) -> getRegsWithoutNode + ([_], NativeReturn) -> allRegs + (_, NativeReturn) -> getRegsWithNode + (_, GC) -> getRegsWithNode + (_, PrimOpCall) -> allRegs + ([_], PrimOpReturn) -> allRegs + (_, PrimOpReturn) -> getRegsWithNode + (_, Slow) -> noRegs + _ -> pprPanic "Unknown calling convention" (ppr conv) + (sizes, assignments) = unzip $ assignArguments' reps (sum sizes) regs assignArguments' [] _ _ = [] assignArguments' (r:rs) offset avails = - (size,(r,assignment)):assignArguments' rs new_offset remaining + (size, (r,assignment)):assignArguments' rs new_offset remaining where (assignment, new_offset, size, remaining) = - assign_reg isCall assign_slot_down (arg_ty r) offset avails + assign_reg assign_slot_pos (arg_ty r) offset avails cvt (l, RegisterParam r) = (l, RegisterParam r) cvt (l, StackParam off) = (l, StackParam $ off * wORD_SIZE) @@ -67,7 +74,7 @@ argumentsSize :: (a -> CmmType) -> [a] -> WordOff argumentsSize f reps = maximum (0 : map arg_top args) where args = assignArguments f reps - arg_top (a, StackParam offset) = -offset + arg_top (_, StackParam offset) = -offset arg_top (_, RegisterParam _) = 0 ----------------------------------------------------------------------------- @@ -85,25 +92,49 @@ type AvailRegs = ( [VGcPtr -> GlobalReg] -- available vanilla regs. -- We take these register supplies from the *real* registers, i.e. those -- that are guaranteed to map to machine registers. -useVanillaRegs | opt_Unregisterised = 0 - | otherwise = mAX_Real_Vanilla_REG -useFloatRegs | opt_Unregisterised = 0 - | otherwise = mAX_Real_Float_REG -useDoubleRegs | opt_Unregisterised = 0 - | otherwise = mAX_Real_Double_REG -useLongRegs | opt_Unregisterised = 0 - | otherwise = mAX_Real_Long_REG - -availRegs = (regList VanillaReg useVanillaRegs, - regList FloatReg useFloatRegs, - regList DoubleReg useDoubleRegs, - regList LongReg useLongRegs) - where - regList f max = map f [1 .. max] +vanillaRegNos, floatRegNos, doubleRegNos, longRegNos :: [Int] +vanillaRegNos | opt_Unregisterised = [] + | otherwise = regList mAX_Real_Vanilla_REG +floatRegNos | opt_Unregisterised = [] + | otherwise = regList mAX_Real_Float_REG +doubleRegNos | opt_Unregisterised = [] + | otherwise = regList mAX_Real_Double_REG +longRegNos | opt_Unregisterised = [] + | otherwise = regList mAX_Real_Long_REG + +-- +getRegsWithoutNode, getRegsWithNode :: AvailRegs +getRegsWithoutNode = + (filter (\r -> r VGcPtr /= node) intRegs, + map FloatReg floatRegNos, map DoubleReg doubleRegNos, map LongReg longRegNos) + where intRegs = map VanillaReg vanillaRegNos +getRegsWithNode = + (intRegs, map FloatReg floatRegNos, map DoubleReg doubleRegNos, map LongReg longRegNos) + where intRegs = map VanillaReg vanillaRegNos + +allVanillaRegNos, allFloatRegNos, allDoubleRegNos, allLongRegNos :: [Int] +allVanillaRegNos = regList mAX_Vanilla_REG +allFloatRegNos = regList mAX_Float_REG +allDoubleRegNos = regList mAX_Double_REG +allLongRegNos = regList mAX_Long_REG + +regList :: Int -> [Int] +regList n = [1 .. n] + +allRegs :: AvailRegs +allRegs = (map VanillaReg allVanillaRegNos, map FloatReg allFloatRegNos, + map DoubleReg allDoubleRegNos, map LongReg allLongRegNos) + +noRegs :: AvailRegs +noRegs = ([], [], [], []) -- Round the size of a local register up to the nearest word. +{- +UNUSED 2008-12-29 + slot_size :: LocalReg -> Int slot_size reg = slot_size' (typeWidth (localRegType reg)) +-} slot_size' :: Width -> Int slot_size' reg = ((widthInBytes reg - 1) `div` wORD_SIZE) + 1 @@ -111,39 +142,42 @@ slot_size' reg = ((widthInBytes reg - 1) `div` wORD_SIZE) + 1 type Assignment = (ParamLocation WordOff, WordOff, WordOff, AvailRegs) type SlotAssigner = Width -> Int -> AvailRegs -> Assignment -assign_reg :: Bool -> SlotAssigner -> CmmType -> WordOff -> AvailRegs -> Assignment -assign_reg isCall slot ty off avails - | isFloatType ty = assign_float_reg slot width off avails - | otherwise = assign_bits_reg isCall slot width off gcp avails +assign_reg :: SlotAssigner -> CmmType -> WordOff -> AvailRegs -> Assignment +assign_reg slot ty off avails + | isFloatType ty = assign_float_reg slot width off avails + | otherwise = assign_bits_reg slot width off gcp avails where width = typeWidth ty gcp | isGcPtrType ty = VGcPtr | otherwise = VNonGcPtr --- Assigning a slot on a stack that grows up: +-- Assigning a slot using negative offsets from the stack pointer. -- JD: I don't know why this convention stops using all the registers -- after running out of one class of registers. -assign_slot_up :: SlotAssigner -assign_slot_up width off regs = +assign_slot_neg :: SlotAssigner +assign_slot_neg width off _regs = (StackParam $ off, off + size, size, ([], [], [], [])) where size = slot_size' width --- Assigning a slot on a stack that grows down: -assign_slot_down :: SlotAssigner -assign_slot_down width off regs = - (StackParam $ off + size, off + size, size, ([], [], [], [])) +-- Assigning a slot using positive offsets into a CallArea. +assign_slot_pos :: SlotAssigner +assign_slot_pos width off _regs = + (StackParam $ off, off - size, size, ([], [], [], [])) where size = slot_size' width --- On calls, `node` is used to hold the closure that is entered, so we can't --- pass arguments in that register. -assign_bits_reg _ _ W128 _ _ _ = panic "I128 is not a supported register type" -assign_bits_reg isCall assign_slot w off gcp regs@(v:vs, fs, ds, ls) = - if isCall && v gcp == node then - assign_bits_reg isCall assign_slot w off gcp (vs, fs, ds, ls) - else if widthInBits w <= widthInBits wordWidth then - (RegisterParam (v gcp), off, 0, (vs, fs, ds, ls)) - else assign_slot w off regs - +-- On calls in the native convention, `node` is used to hold the environment +-- for the closure, so we can't pass arguments in that register. +assign_bits_reg :: SlotAssigner -> Width -> WordOff -> VGcPtr -> AvailRegs -> Assignment +assign_bits_reg _ W128 _ _ _ = panic "W128 is not a supported register type" +assign_bits_reg _ w off gcp (v:vs, fs, ds, ls) + | widthInBits w <= widthInBits wordWidth = + (RegisterParam (v gcp), off, 0, (vs, fs, ds, ls)) +assign_bits_reg _ w off _ (vs, fs, ds, l:ls) + | widthInBits w > widthInBits wordWidth = + (RegisterParam l, off, 0, (vs, fs, ds, ls)) +assign_bits_reg assign_slot w off _ regs@(_, _, _, _) = assign_slot w off regs + +assign_float_reg :: SlotAssigner -> Width -> WordOff -> AvailRegs -> Assignment assign_float_reg _ W32 off (vs, f:fs, ds, ls) = (RegisterParam $ f, off, 0, (vs, fs, ds, ls)) assign_float_reg _ W64 off (vs, fs, d:ds, ls) = (RegisterParam $ d, off, 0, (vs, fs, ds, ls)) -assign_float_reg _ W80 off _ = panic "F80 is not a supported register type" +assign_float_reg _ W80 _ _ = panic "F80 is not a supported register type" assign_float_reg assign_slot width off r = assign_slot width off r