CgParallel.hs 2.77 KB
 simonmar committed Aug 13, 2004 1 2 3 4 5 6 7 8 9 10 11 12 13 14 -- Code generation relaed to GpH -- (a) parallel -- (b) GranSim module CgParallel( staticGranHdr,staticParHdr, granFetchAndReschedule, granYield, doGranAllocate ) where import CgMonad import CgCallConv ( mkRegLiveness ) import Id ( Id ) import Cmm ( CmmLit, GlobalReg(..), node, CmmExpr )  simonmar committed Mar 18, 2005 15 import StaticFlags ( opt_GranMacros )  simonmar committed Aug 13, 2004 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 import Outputable staticParHdr :: [CmmLit] -- Parallel header words in a static closure staticParHdr = [] -------------------------------------------------------- -- GranSim stuff -------------------------------------------------------- staticGranHdr :: [CmmLit] -- Gransim header words in a static closure staticGranHdr = [] doGranAllocate :: CmmExpr -> Code -- macro DO_GRAN_ALLOCATE doGranAllocate hp | not opt_GranMacros = nopC | otherwise = panic "doGranAllocate" ------------------------- granFetchAndReschedule :: [(Id,GlobalReg)] -- Live registers -> Bool -- Node reqd? -> Code -- Emit code for simulating a fetch and then reschedule. granFetchAndReschedule regs node_reqd | opt_GranMacros && (node elem map snd regs || node_reqd) = do { fetch ; reschedule liveness node_reqd } | otherwise = nopC where liveness = mkRegLiveness regs 0 0 fetch = panic "granFetch" -- Was: absC (CMacroStmt GRAN_FETCH []) --HWL: generate GRAN_FETCH macro for GrAnSim -- currently GRAN_FETCH and GRAN_FETCH_AND_RESCHEDULE are miai reschedule liveness node_reqd = panic "granReschedule" -- Was: absC (CMacroStmt GRAN_RESCHEDULE [ -- mkIntCLit (I# (word2Int# liveness_mask)), -- mkIntCLit (if node_reqd then 1 else 0)]) ------------------------- -- The @GRAN_YIELD@ macro is taken from JSM's code for Concurrent Haskell. It -- allows to context-switch at places where @node@ is not alive (it uses the -- @Continue@ rather than the @EnterNodeCode@ function in the RTS). We emit -- this kind of macro at the beginning of the following kinds of basic bocks: -- \begin{itemize} -- \item Slow entry code where node is not alive (see @CgClosure.lhs@). Normally -- we use @fetchAndReschedule@ at a slow entry code. -- \item Fast entry code (see @CgClosure.lhs@). -- \item Alternatives in case expressions (@CLabelledCode@ structures), provided -- that they are not inlined (see @CgCases.lhs@). These alternatives will -- be turned into separate functions. granYield :: [(Id,GlobalReg)] -- Live registers -> Bool -- Node reqd? -> Code granYield regs node_reqd | opt_GranMacros && node_reqd = yield liveness | otherwise = nopC where liveness = mkRegLiveness regs 0 0 yield liveness = panic "granYield" -- Was : absC (CMacroStmt GRAN_YIELD -- [mkIntCLit (I# (word2Int# liveness_mask))])