%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1995
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
%************************************************************************
%* *
%************************************************************************
\begin{code}
-#include "HsVersions.h"
-
module PprAbsC (
-#ifdef __GLASGOW_HASKELL__
writeRealC,
-#endif
dumpRealC,
-#if defined(DEBUG) || defined(DPH)
- pprAmode, -- otherwise, not exported
-#endif
-#ifdef DPH
- pprAbsC,
- pprMagicId,
-#endif
-
- -- and for interface self-sufficiency...
- AbstractC, CAddrMode, MagicId,
- PprStyle, CSeq
+ pprAmode,
+ pprMagicId
) where
-IMPORT_Trace -- ToDo: rm (debugging only)
+#include "HsVersions.h"
+
+import IO ( Handle )
import AbsCSyn
+import ClosureInfo
+import AbsCUtils ( getAmodeRep, nonemptyAbsC,
+ mixedPtrLocn, mixedTypeLocn
+ )
+
+import Constants ( mIN_UPD_SIZE )
+import CallConv ( CallConv, callConvAttribute, cCallConv )
+import CLabel ( externallyVisibleCLabel, mkErrorStdEntryLabel,
+ isReadOnly, needsCDecl, pprCLabel,
+ mkReturnInfoLabel, mkReturnPtLabel,
+ CLabel, CLabelType(..), labelType
+ )
-import AbsPrel ( pprPrimOp, primOpNeedsWrapper, PrimOp(..)
- IF_ATTACK_PRAGMAS(COMMA tagOf_PrimOp)
+import CmdLineOpts ( opt_SccProfilingOn, opt_EmitCExternDecls, opt_GranMacros )
+import CostCentre ( pprCostCentreDecl, pprCostCentreStackDecl )
+
+import Costs ( costs, addrModeCosts, CostRes(..), Side(..) )
+import CStrings ( stringToC )
+import FiniteMap ( addToFM, emptyFM, lookupFM, FiniteMap )
+import Const ( Literal(..) )
+import Maybes ( maybeToBool, catMaybes )
+import PrimOp ( primOpNeedsWrapper, pprPrimOp, PrimOp(..) )
+import PrimRep ( isFloatingRep, PrimRep(..), getPrimRepSize, showPrimRep )
+import SMRep ( pprSMRep )
+import Unique ( pprUnique, Unique{-instance NamedThing-} )
+import UniqSet ( emptyUniqSet, elementOfUniqSet,
+ addOneToUniqSet, UniqSet
)
-import BasicLit ( kindOfBasicLit, showBasicLit )
-import CLabelInfo -- lots of things
-import CgCompInfo ( spARelToInt, spBRelToInt, mIN_UPD_SIZE )
-import CgRetConv ( noLiveRegsMask )
-import ClosureInfo -- quite a few things
-import CmdLineOpts ( GlobalSwitch(..) )
-import Costs -- for GrAnSim; cost counting function -- HWL
-import CostCentre
-import FiniteMap
-import Maybes ( catMaybes, maybeToBool, Maybe(..) )
+import StgSyn ( SRT(..) )
+import BitSet ( intBS )
import Outputable
-import Pretty ( codeStyle, prettyToUn )
-import PrimKind ( showPrimKind, isFloatingKind, PrimKind(..) )
-import SplitUniq
-import StgSyn
-import UniqFM
-import Unique -- UniqueSupply monadery used in flattening
-import Unpretty -- ********** NOTE **********
-import Util
+import Util ( nOfThem )
+import Addr ( Addr )
+
+import ST
+import MutableArray
infixr 9 `thenTE`
\end{code}
@pprAbsC@ has a new ``costs'' argument. %% HWL
\begin{code}
-#ifdef __GLASGOW_HASKELL__
-# if __GLASGOW_HASKELL__ < 23
-# define _FILE _Addr
-# endif
-writeRealC :: (GlobalSwitch -> Bool) -> _FILE -> AbstractC -> PrimIO ()
-
-writeRealC sw_chker file absC
- = uppAppendFile file 80 (
- uppAbove (pprAbsC (PprForC sw_chker) absC (costs absC)) (uppChar '\n')
- )
-#endif
+{-
+writeRealC :: Handle -> AbstractC -> IO ()
+writeRealC handle absC
+ -- avoid holding on to the whole of absC in the !Gransim case.
+ if opt_GranMacros
+ then printForCFast fp (pprAbsC absC (costs absC))
+ else printForCFast fp (pprAbsC absC (panic "costs"))
+ --printForC handle (pprAbsC absC (panic "costs"))
+dumpRealC :: AbstractC -> SDoc
+dumpRealC absC = pprAbsC absC (costs absC)
+-}
-dumpRealC :: (GlobalSwitch -> Bool) -> AbstractC -> String
+writeRealC :: Handle -> AbstractC -> IO ()
+--writeRealC handle absC =
+-- _scc_ "writeRealC"
+-- printDoc LeftMode handle (pprAbsC absC (costs absC))
+
+writeRealC handle absC
+ | opt_GranMacros = _scc_ "writeRealC" printForC handle $
+ pprCode CStyle (pprAbsC absC (costs absC))
+ | otherwise = _scc_ "writeRealC" printForC handle $
+ pprCode CStyle (pprAbsC absC (panic "costs"))
+
+dumpRealC :: AbstractC -> SDoc
+dumpRealC absC
+ | opt_GranMacros = pprCode CStyle (pprAbsC absC (costs absC))
+ | otherwise = pprCode CStyle (pprAbsC absC (panic "costs"))
-dumpRealC sw_chker absC
- = uppShow 80 (
- uppAbove (pprAbsC (PprForC sw_chker) absC (costs absC)) (uppChar '\n')
- )
\end{code}
This emits the macro, which is used in GrAnSim to compute the total costs
from a cost 5 tuple. %% HWL
\begin{code}
-emitMacro :: CostRes -> Unpretty
-
-#ifndef GRAN
-emitMacro _ = uppNil
-#else
-emitMacro (Cost (i,b,l,s,f))
- = uppBesides [ uppStr "GRAN_EXEC(",
- uppInt i, uppComma, uppInt b, uppComma, uppInt l, uppComma,
- uppInt s, uppComma, uppInt f, pp_paren_semi ]
-#endif {-GRAN-}
-\end{code}
+emitMacro :: CostRes -> SDoc
-\begin{code}
-pp_paren_semi = uppStr ");"
+emitMacro _ | not opt_GranMacros = empty
--- ---------------------------------------------------------------------------
--- New type: Now pprAbsC also takes the costs for evaluating the Abstract C
--- code as an argument (that's needed when spitting out the GRAN_EXEC macro
--- which must be done before the return i.e. inside absC code) HWL
--- ---------------------------------------------------------------------------
+emitMacro (Cost (i,b,l,s,f))
+ = hcat [ ptext SLIT("GRAN_EXEC"), char '(',
+ int i, comma, int b, comma, int l, comma,
+ int s, comma, int f, pp_paren_semi ]
-pprAbsC :: PprStyle -> AbstractC -> CostRes -> Unpretty
+pp_paren_semi = text ");"
+\end{code}
-pprAbsC sty AbsCNop _ = uppNil
-pprAbsC sty (AbsCStmts s1 s2) c = uppAbove (pprAbsC sty s1 c) (pprAbsC sty s2 c)
+New type: Now pprAbsC also takes the costs for evaluating the Abstract C
+code as an argument (that's needed when spitting out the GRAN_EXEC macro
+which must be done before the return i.e. inside absC code) HWL
-pprAbsC sty (CClosureUpdInfo info) c
- = pprAbsC sty info c
+\begin{code}
+pprAbsC :: AbstractC -> CostRes -> SDoc
+pprAbsC AbsCNop _ = empty
+pprAbsC (AbsCStmts s1 s2) c = ($$) (pprAbsC s1 c) (pprAbsC s2 c)
-pprAbsC sty (CAssign dest src) _ = pprAssign sty (getAmodeKind dest) dest src
+pprAbsC (CAssign dest src) _ = pprAssign (getAmodeRep dest) dest src
-pprAbsC sty (CJump target) c
- = uppAbove (uppBesides [emitMacro c {-WDP:, uppStr "/* <--++ CJump */"-} ])
- (uppBesides [ uppStr "JMP_(", pprAmode sty target, pp_paren_semi ])
+pprAbsC (CJump target) c
+ = ($$) (hcat [emitMacro c {-WDP:, text "/* <--++ CJump */"-} ])
+ (hcat [ text jmp_lit, pprAmode target, pp_paren_semi ])
-pprAbsC sty (CFallThrough target) c
- = uppAbove (uppBesides [emitMacro c {-WDP:, uppStr "/* <--++ CFallThrough */"-} ])
- (uppBesides [ uppStr "JMP_(", pprAmode sty target, pp_paren_semi ])
+pprAbsC (CFallThrough target) c
+ = ($$) (hcat [emitMacro c {-WDP:, text "/* <--++ CFallThrough */"-} ])
+ (hcat [ text jmp_lit, pprAmode target, pp_paren_semi ])
-- --------------------------------------------------------------------------
--- Spit out GRAN_EXEC macro immediately before the return HWL
+-- Spit out GRAN_EXEC macro immediately before the return HWL
-pprAbsC sty (CReturn am return_info) c
- = uppAbove (uppBesides [emitMacro c {-WDP:, uppStr "/* <---- CReturn */"-} ])
- (uppBesides [uppStr "JMP_(", target, pp_paren_semi ])
+pprAbsC (CReturn am return_info) c
+ = ($$) (hcat [emitMacro c {-WDP:, text "/* <---- CReturn */"-} ])
+ (hcat [text jmp_lit, target, pp_paren_semi ])
where
target = case return_info of
- DirectReturn -> uppBesides [uppStr "DIRECT(", pprAmode sty am, uppRparen]
- DynamicVectoredReturn am' -> mk_vector (pprAmode sty am')
- StaticVectoredReturn n -> mk_vector (uppInt n) -- Always positive
- mk_vector x = uppBesides [uppLparen, pprAmode sty am, uppStr ")[RVREL(", x, uppStr ")]"]
-
-{-UNUSED:
-pprAbsC sty (CComment s) _
- = uppNil -- ifPprShowAll sty (uppCat [uppStr "/*", uppStr s, uppStr "*/"])
--}
+ DirectReturn -> hcat [char '(', pprAmode am, rparen]
+ DynamicVectoredReturn am' -> mk_vector (pprAmode am')
+ StaticVectoredReturn n -> mk_vector (int n) -- Always positive
+ mk_vector x = hcat [text "RET_VEC", char '(', pprAmode am, comma,
+ x, rparen ]
-pprAbsC sty (CSplitMarker) _ = uppPStr SLIT("/* SPLIT */")
+pprAbsC (CSplitMarker) _ = ptext SLIT("/* SPLIT */")
-- we optimise various degenerate cases of CSwitches.
-- costs function yields nullCosts for whole switch
-- ==> inherited costs c are those of basic block up to switch
-- ==> inherit c + costs for the corresponding branch
--- HWL
+-- HWL
-- --------------------------------------------------------------------------
-pprAbsC sty (CSwitch discrim [] deflt) c
- = pprAbsC sty deflt (c + costs deflt)
+pprAbsC (CSwitch discrim [] deflt) c
+ = pprAbsC deflt (c + costs deflt)
-- Empty alternative list => no costs for discrim as nothing cond. here HWL
-pprAbsC sty (CSwitch discrim [(tag,alt_code)] deflt) c -- only one alt
+pprAbsC (CSwitch discrim [(tag,alt_code)] deflt) c -- only one alt
= case (nonemptyAbsC deflt) of
Nothing -> -- one alt and no default
- pprAbsC sty alt_code (c + costs alt_code)
+ pprAbsC alt_code (c + costs alt_code)
-- Nothing conditional in here either HWL
Just dc -> -- make it an "if"
- do_if_stmt sty discrim tag alt_code dc c
+ do_if_stmt discrim tag alt_code dc c
-pprAbsC sty (CSwitch discrim [(tag1@(MachInt i1 _), alt_code1),
+-- What problem is the re-ordering trying to solve ?
+pprAbsC (CSwitch discrim [(tag1@(MachInt i1 _), alt_code1),
(tag2@(MachInt i2 _), alt_code2)] deflt) c
| empty_deflt && ((i1 == 0 && i2 == 1) || (i1 == 1 && i2 == 0))
= if (i1 == 0) then
- do_if_stmt sty discrim tag1 alt_code1 alt_code2 c
+ do_if_stmt discrim tag1 alt_code1 alt_code2 c
else
- do_if_stmt sty discrim tag2 alt_code2 alt_code1 c
+ do_if_stmt discrim tag2 alt_code2 alt_code1 c
where
empty_deflt = not (maybeToBool (nonemptyAbsC deflt))
-pprAbsC sty (CSwitch discrim alts deflt) c -- general case
- | isFloatingKind (getAmodeKind discrim)
- = pprAbsC sty (foldr ( \ a -> CSwitch discrim [a]) deflt alts) c
+pprAbsC (CSwitch discrim alts deflt) c -- general case
+ | isFloatingRep (getAmodeRep discrim)
+ = pprAbsC (foldr ( \ a -> CSwitch discrim [a]) deflt alts) c
| otherwise
- = uppAboves [
- uppBesides [uppStr "switch (", pp_discrim, uppStr ") {"],
- uppNest 2 (uppAboves (map (ppr_alt sty) alts)),
+ = vcat [
+ hcat [text "switch (", pp_discrim, text ") {"],
+ nest 2 (vcat (map ppr_alt alts)),
(case (nonemptyAbsC deflt) of
- Nothing -> uppNil
+ Nothing -> empty
Just dc ->
- uppNest 2 (uppAboves [uppPStr SLIT("default:"),
- pprAbsC sty dc (c + switch_head_cost
- + costs dc),
- uppPStr SLIT("break;")])),
- uppChar '}' ]
+ nest 2 (vcat [ptext SLIT("default:"),
+ pprAbsC dc (c + switch_head_cost
+ + costs dc),
+ ptext SLIT("break;")])),
+ char '}' ]
where
pp_discrim
- = pprAmode sty discrim
+ = pprAmode discrim
- ppr_alt sty (lit, absC)
- = uppAboves [ uppBesides [uppPStr SLIT("case "), pprBasicLit sty lit, uppChar ':'],
- uppNest 2 (uppAbove (pprAbsC sty absC (c + switch_head_cost + costs absC))
- (uppPStr SLIT("break;"))) ]
+ ppr_alt (lit, absC)
+ = vcat [ hcat [ptext SLIT("case "), pprBasicLit lit, char ':'],
+ nest 2 (($$) (pprAbsC absC (c + switch_head_cost + costs absC))
+ (ptext SLIT("break;"))) ]
-- Costs for addressing header of switch and cond. branching -- HWL
switch_head_cost = addrModeCosts discrim Rhs + (Cost (0, 1, 0, 0, 0))
-pprAbsC sty stmt@(COpStmt results op@(CCallOp _ _ _ _ _) args liveness_mask vol_regs) _
- = pprCCall sty op args results liveness_mask vol_regs
+pprAbsC stmt@(COpStmt results op@(CCallOp _ _ _ _) args vol_regs) _
+ = pprCCall op args results vol_regs
-pprAbsC sty stmt@(COpStmt results op args liveness_mask vol_regs) _
+pprAbsC stmt@(COpStmt results op args vol_regs) _
= let
non_void_args = grab_non_void_amodes args
- non_void_results = grab_non_void_amodes results
+ non_void_results = grab_non_void_amodes results
-- if just one result, we print in the obvious "assignment" style;
-- if 0 or many results, we emit a macro call, w/ the results
-- followed by the arguments. The macro presumably knows which
the_op = ppr_op_call non_void_results non_void_args
-- liveness mask is *in* the non_void_args
in
- BIND (ppr_vol_regs sty vol_regs) _TO_ (pp_saves, pp_restores) ->
+ case (ppr_vol_regs vol_regs) of { (pp_saves, pp_restores) ->
if primOpNeedsWrapper op then
- uppAboves [ pp_saves,
- the_op,
- pp_restores
- ]
+ vcat [ pp_saves,
+ the_op,
+ pp_restores
+ ]
else
the_op
- BEND
+ }
where
ppr_op_call results args
- = uppBesides [ prettyToUn (pprPrimOp sty op), uppLparen,
- uppIntersperse uppComma (map ppr_op_result results),
- if null results || null args then uppNil else uppComma,
- uppIntersperse uppComma (map (pprAmode sty) args),
+ = hcat [ pprPrimOp op, lparen,
+ hcat (punctuate comma (map ppr_op_result results)),
+ if null results || null args then empty else comma,
+ hcat (punctuate comma (map pprAmode args)),
pp_paren_semi ]
- ppr_op_result r = ppr_amode sty r
+ ppr_op_result r = ppr_amode r
-- primop macros do their own casting of result;
-- hence we can toss the provided cast...
-pprAbsC sty (CSimultaneous abs_c) c
- = uppBesides [uppStr "{{", pprAbsC sty abs_c c, uppStr "}}"]
-
-pprAbsC sty stmt@(CMacroStmt macro as) _
- = uppBesides [uppStr (show macro), uppLparen,
- uppIntersperse uppComma (map (ppr_amode sty) as),pp_paren_semi] -- no casting
-pprAbsC sty stmt@(CCallProfCtrMacro op as) _
- = uppBesides [uppPStr op, uppLparen,
- uppIntersperse uppComma (map (ppr_amode sty) as),pp_paren_semi]
-pprAbsC sty stmt@(CCallProfCCMacro op as) _
- = uppBesides [uppPStr op, uppLparen,
- uppIntersperse uppComma (map (ppr_amode sty) as),pp_paren_semi]
-
-pprAbsC sty (CCodeBlock label abs_C) _
- = ASSERT( maybeToBool(nonemptyAbsC abs_C) )
- BIND (pprTempAndExternDecls abs_C) _TO_ (pp_temps, pp_exts) ->
- uppAboves [
- uppBesides [uppStr (if (externallyVisibleCLabel label)
+pprAbsC stmt@(CSRT lbl closures) c
+ = case (pprTempAndExternDecls stmt) of { (_, pp_exts) ->
+ pp_exts
+ $$ ptext SLIT("SRT") <> lparen <> pprCLabel lbl <> rparen
+ $$ nest 2 (hcat (punctuate comma (map pp_closure_lbl closures)))
+ <> ptext SLIT("};")
+ }
+ where pp_closure_lbl lbl = char '&' <> pprCLabel lbl
+
+pprAbsC stmt@(CBitmap lbl mask) c
+ = vcat [
+ hcat [ ptext SLIT("BITMAP"), lparen,
+ pprCLabel lbl, comma,
+ int (length mask),
+ rparen ],
+ hcat (punctuate comma (map (int.intBS) mask)),
+ ptext SLIT("}};")
+ ]
+
+pprAbsC (CSimultaneous abs_c) c
+ = hcat [ptext SLIT("{{"), pprAbsC abs_c c, ptext SLIT("}}")]
+
+pprAbsC (CCheck macro as code) c
+ = hcat [text (show macro), lparen,
+ hcat (punctuate comma (map ppr_amode as)), comma,
+ pprAbsC code c, pp_paren_semi
+ ]
+pprAbsC (CMacroStmt macro as) _
+ = hcat [text (show macro), lparen,
+ hcat (punctuate comma (map ppr_amode as)),pp_paren_semi] -- no casting
+pprAbsC (CCallProfCtrMacro op as) _
+ = hcat [ptext op, lparen,
+ hcat (punctuate comma (map ppr_amode as)),pp_paren_semi]
+pprAbsC (CCallProfCCMacro op as) _
+ = hcat [ptext op, lparen,
+ hcat (punctuate comma (map ppr_amode as)),pp_paren_semi]
+pprAbsC stmt@(CCallTypedef op@(CCallOp op_str is_asm may_gc cconv) results args) _
+ = hsep [ ptext SLIT("typedef")
+ , ccall_res_ty
+ , fun_nm
+ , parens (hsep (punctuate comma ccall_decl_ty_args))
+ ] <> semi
+ where
+ fun_nm = parens (text (callConvAttribute cconv) <+> char '*' <> ccall_fun_ty)
+
+ ccall_fun_ty =
+ case op_str of
+ Right u -> ptext SLIT("_ccall_fun_ty") <> ppr u
+
+ ccall_res_ty =
+ case non_void_results of
+ [] -> ptext SLIT("void")
+ [amode] -> text (showPrimRep (getAmodeRep amode))
+ _ -> panic "pprAbsC{CCallTypedef}: ccall_res_ty"
+
+ ccall_decl_ty_args = tail ccall_arg_tys
+ ccall_arg_tys = map (text.showPrimRep.getAmodeRep) non_void_args
+
+ -- the first argument will be the "I/O world" token (a VoidRep)
+ -- all others should be non-void
+ non_void_args =
+ let nvas = tail args
+ in ASSERT (all non_void nvas) nvas
+
+ -- there will usually be two results: a (void) state which we
+ -- should ignore and a (possibly void) result.
+ non_void_results =
+ let nvrs = grab_non_void_amodes results
+ in ASSERT (length nvrs <= 1) nvrs
+
+pprAbsC (CCodeBlock label abs_C) _
+ = if not (maybeToBool(nonemptyAbsC abs_C)) then
+ pprTrace "pprAbsC: curious empty code block for" (pprCLabel label) empty
+ else
+ case (pprTempAndExternDecls abs_C) of { (pp_temps, pp_exts) ->
+ vcat [
+ hcat [text (if (externallyVisibleCLabel label)
then "FN_(" -- abbreviations to save on output
else "IFN_("),
- pprCLabel sty label, uppStr ") {"],
- case sty of
- PprForC _ -> uppAbove pp_exts pp_temps
- _ -> uppNil,
- uppNest 8 (uppPStr SLIT("FB_")),
- uppNest 8 (pprAbsC sty abs_C (costs abs_C)),
- uppNest 8 (uppPStr SLIT("FE_")),
- uppChar '}' ]
- BEND
-
-pprAbsC sty (CInitHdr cl_info reg_rel cost_centre inplace_upd) _
- = uppBesides [ pp_init_hdr, uppStr "_HDR(",
- ppr_amode sty (CAddr reg_rel), uppComma,
- pprCLabel sty info_lbl, uppComma,
- if_profiling sty (pprAmode sty cost_centre), uppComma,
- pprHeapOffset sty size, uppComma, uppInt ptr_wds, pp_paren_semi ]
+ pprCLabel label, text ") {"],
+
+ pp_exts, pp_temps,
+
+ nest 8 (ptext SLIT("FB_")),
+ nest 8 (pprAbsC abs_C (costs abs_C)),
+ nest 8 (ptext SLIT("FE_")),
+ char '}' ]
+ }
+
+
+pprAbsC (CInitHdr cl_info reg_rel cost_centre) _
+ = hcat [ ptext SLIT("SET_HDR_"), char '(',
+ ppr_amode (CAddr reg_rel), comma,
+ pprCLabelAddr info_lbl, comma,
+ if_profiling (pprAmode cost_centre),
+ pp_paren_semi ]
where
info_lbl = infoTableLabelFromCI cl_info
- sm_rep = closureSMRep cl_info
- size = closureSizeWithoutFixedHdr cl_info
- ptr_wds = closurePtrsSize cl_info
-
- pp_init_hdr = uppStr (if inplace_upd then
- getSMUpdInplaceHdrStr sm_rep
- else
- getSMInitHdrStr sm_rep)
-
-pprAbsC sty stmt@(CStaticClosure closure_lbl cl_info cost_centre amodes) _
- = BIND (pprTempAndExternDecls stmt) _TO_ (_, pp_exts) ->
- uppAboves [
- case sty of
- PprForC _ -> pp_exts
- _ -> uppNil,
- uppBesides [
- uppStr "SET_STATIC_HDR(",
- pprCLabel sty closure_lbl, uppComma,
- pprCLabel sty info_lbl, uppComma,
- if_profiling sty (pprAmode sty cost_centre), uppComma,
- ppLocalness closure_lbl, uppComma,
- ppLocalnessMacro False{-for data-} info_lbl,
- uppChar ')'
+
+pprAbsC stmt@(CStaticClosure closure_lbl cl_info cost_centre amodes) _
+ = case (pprTempAndExternDecls stmt) of { (_, pp_exts) ->
+ vcat [
+ pp_exts,
+ hcat [
+ ptext SLIT("SET_STATIC_HDR"), char '(',
+ pprCLabel closure_lbl, comma,
+ pprCLabel info_lbl, comma,
+ if_profiling (pprAmode cost_centre), comma,
+ ppLocalness closure_lbl, comma,
+ ppLocalnessMacro info_lbl,
+ char ')'
],
- uppNest 2 (uppBesides (map (ppr_item sty) amodes)),
- uppNest 2 (uppBesides (map (ppr_item sty) padding_wds)),
- uppStr "};" ]
- BEND
+ nest 2 (ppr_payload (amodes ++ padding_wds)),
+ ptext SLIT("};") ]
+ }
where
info_lbl = infoTableLabelFromCI cl_info
- ppr_item sty item
- = if getAmodeKind item == VoidKind
- then uppStr ", (W_) 0" -- might not even need this...
- else uppBeside (uppStr ", (W_)") (ppr_amode sty item)
-
+ ppr_payload [] = empty
+ ppr_payload ls = comma <+>
+ braces (hsep (punctuate comma (map ((text "(L_)" <>).ppr_item) ls)))
+
+ ppr_item item
+ | rep == VoidRep = text "0" -- might not even need this...
+ | rep == FloatRep = ppr_amode (floatToWord item)
+ | rep == DoubleRep = hcat (punctuate (text ", (L_)")
+ (map ppr_amode (doubleToWords item)))
+ | otherwise = ppr_amode item
+ where
+ rep = getAmodeRep item
+
+ -- always at least one padding word: this is the static link field for
+ -- the garbage collector.
padding_wds =
if not (closureUpdReqd cl_info) then
- []
+ [mkIntCLit 0]
else
- BIND (max 0 (mIN_UPD_SIZE - length amodes)) _TO_ still_needed ->
- nOfThem still_needed (mkIntCLit 0) -- a bunch of 0s
- BEND
-
-{-
- STATIC_INIT_HDR(c,i,localness) blows into:
- localness W_ c_closure [] = { i_info, extra_fixed_wd<1..n>
-
- then *NO VarHdr STUFF FOR STATIC*...
-
- then the amodes are dropped in...
- ,a1 ,a2 ... ,aN
- then a close brace:
- };
--}
-
-pprAbsC sty stmt@(CClosureInfoAndCode cl_info slow maybe_fast upd cl_descr) _
- = uppAboves [
- uppBesides [
- pp_info_rep,
- uppStr "_ITBL(",
- pprCLabel sty info_lbl, uppComma,
-
- -- CONST_ITBL needs an extra label for
- -- the static version of the object.
- if isConstantRep sm_rep
- then uppBeside (pprCLabel sty (closureLabelFromCI cl_info)) uppComma
- else uppNil,
-
- pprCLabel sty slow_lbl, uppComma,
- pprAmode sty upd, uppComma,
- uppInt (dataConLiveness cl_info), uppComma,
-
- pp_tag, uppComma,
- pp_size, uppComma,
- pp_ptr_wds, uppComma,
-
- ppLocalness info_lbl, uppComma,
- ppLocalnessMacro True{-function-} slow_lbl, uppComma,
-
- if is_selector
- then uppBeside (uppInt select_word_i) uppComma
- else uppNil,
-
- if_profiling sty pp_kind, uppComma,
- if_profiling sty pp_descr, uppComma,
- if_profiling sty pp_type,
- uppStr ");"
- ],
- pp_slow,
+ case 1 + (max 0 (mIN_UPD_SIZE - length amodes)) of { still_needed ->
+ nOfThem still_needed (mkIntCLit 0) } -- a bunch of 0s
+
+pprAbsC stmt@(CClosureInfoAndCode cl_info slow maybe_fast srt cl_descr) _
+ = vcat [
+ hcat [
+ ptext SLIT("INFO_TABLE"),
+ ( if is_selector then
+ ptext SLIT("_SELECTOR")
+ else if is_constr then
+ ptext SLIT("_CONSTR")
+ else if needs_srt then
+ ptext SLIT("_SRT")
+ else empty ), char '(',
+
+ pprCLabel info_lbl, comma,
+ pprCLabel slow_lbl, comma,
+ pp_rest, {- ptrs,nptrs,[srt,]type,-} comma,
+
+ ppLocalness info_lbl, comma,
+ ppLocalnessMacro slow_lbl, comma,
+
+ if_profiling pp_descr, comma,
+ if_profiling pp_type,
+ text ");"
+ ],
+ pp_slow,
case maybe_fast of
- Nothing -> uppNil
- Just fast -> let stuff = CCodeBlock fast_lbl fast in
- pprAbsC sty stuff (costs stuff)
+ Nothing -> empty
+ Just fast -> let stuff = CCodeBlock fast_lbl fast in
+ pprAbsC stuff (costs stuff)
]
where
info_lbl = infoTableLabelFromCI cl_info
fast_lbl = fastLabelFromCI cl_info
- sm_rep = closureSMRep cl_info
(slow_lbl, pp_slow)
= case (nonemptyAbsC slow) of
- Nothing -> (mkErrorStdEntryLabel, uppNil)
+ Nothing -> (mkErrorStdEntryLabel, empty)
Just xx -> (entryLabelFromCI cl_info,
let stuff = CCodeBlock slow_lbl xx in
- pprAbsC sty stuff (costs stuff))
+ pprAbsC stuff (costs stuff))
maybe_selector = maybeSelectorInfo cl_info
is_selector = maybeToBool maybe_selector
- (Just (_, select_word_i)) = maybe_selector
-
- pp_info_rep -- special stuff if it's a selector; otherwise, just the SMrep
- = uppStr (if is_selector then "SELECT" else (getSMInfoStr sm_rep))
-
- pp_tag = uppInt (closureSemiTag cl_info)
-
- is_phantom = isPhantomRep sm_rep
-
- pp_size = if isSpecRep sm_rep then -- exploiting: SPEC_VHS == 0 (always)
- uppInt (closureNonHdrSize cl_info)
-
- else if is_phantom then -- do not have sizes for these
- uppNil
- else
- pprHeapOffset sty (closureSizeWithoutFixedHdr cl_info)
-
- pp_ptr_wds = if is_phantom then
- uppNil
- else
- uppInt (closurePtrsSize cl_info)
-
- pp_kind = uppStr (closureKind cl_info)
- pp_descr = uppBesides [uppChar '"', uppStr (stringToC cl_descr), uppChar '"']
- pp_type = uppBesides [uppChar '"', uppStr (stringToC (closureTypeDescr cl_info)), uppChar '"']
-
-pprAbsC sty (CRetVector lbl maybes deflt) c
- = uppAboves [ uppStr "{ // CRetVector (lbl????)",
- uppNest 8 (uppSep (map (ppr_maybe_amode sty) maybes)),
- uppStr "} /*default=*/ {", pprAbsC sty deflt c,
- uppStr "}"]
+ (Just select_word_i) = maybe_selector
+
+ maybe_tag = closureSemiTag cl_info
+ is_constr = maybeToBool maybe_tag
+ (Just tag) = maybe_tag
+
+ needs_srt = has_srt srt && needsSRT cl_info
+
+ size = closureNonHdrSize cl_info
+
+ ptrs = closurePtrsSize cl_info
+ nptrs = size - ptrs
+
+ pp_rest | is_selector = int select_word_i
+ | otherwise = hcat [
+ int ptrs, comma,
+ int nptrs, comma,
+ if is_constr then
+ hcat [ int tag, comma ]
+ else if needs_srt then
+ pp_srt_info srt
+ else empty,
+ type_str ]
+
+ type_str = pprSMRep (closureSMRep cl_info)
+
+ pp_descr = hcat [char '"', text (stringToC cl_descr), char '"']
+ pp_type = hcat [char '"', text (stringToC (closureTypeDescr cl_info)), char '"']
+
+pprAbsC stmt@(CRetDirect uniq code srt liveness) _
+ = vcat [
+ hcat [
+ ptext SLIT("INFO_TABLE_SRT_BITMAP"), lparen,
+ pprCLabel info_lbl, comma,
+ pprCLabel entry_lbl, comma,
+ pp_liveness liveness, comma, -- bitmap
+ pp_srt_info srt, -- SRT
+ ptext type_str, comma, -- closure type
+ ppLocalness info_lbl, comma, -- info table storage class
+ ppLocalnessMacro entry_lbl, comma, -- entry pt storage class
+ int 0, comma,
+ int 0, text ");"
+ ],
+ pp_code
+ ]
where
- ppr_maybe_amode sty Nothing = uppPStr SLIT("/*default*/")
- ppr_maybe_amode sty (Just a) = pprAmode sty a
+ info_lbl = mkReturnInfoLabel uniq
+ entry_lbl = mkReturnPtLabel uniq
+
+ pp_code = let stuff = CCodeBlock entry_lbl code in
+ pprAbsC stuff (costs stuff)
+
+ type_str = case liveness of
+ LvSmall _ -> SLIT("RET_SMALL")
+ LvLarge _ -> SLIT("RET_BIG")
+
+pprAbsC stmt@(CRetVector label amodes srt liveness) _
+ = vcat [
+ pp_vector,
+ hcat [
+ ptext SLIT(" }"), comma, ptext SLIT("\n VEC_INFO_TABLE"),
+ lparen,
+ pp_liveness liveness, comma, -- bitmap liveness mask
+ pp_srt_info srt, -- SRT
+ ptext type_str, -- or big, depending on the size
+ -- of the liveness mask.
+ rparen
+ ],
+ text "};"
+ ]
-pprAbsC sty stmt@(CRetUnVector label amode) _
- = uppBesides [uppStr "UNVECTBL(", pp_static, uppComma, pprCLabel sty label, uppComma,
- pprAmode sty amode, uppRparen]
- where
- pp_static = if externallyVisibleCLabel label then uppNil else uppPStr SLIT("static")
-
-pprAbsC sty stmt@(CFlatRetVector label amodes) _
- = BIND (pprTempAndExternDecls stmt) _TO_ (_, pp_exts) ->
- uppAboves [
- case sty of
- PprForC _ -> pp_exts
- _ -> uppNil,
- uppBesides [ppLocalness label, uppPStr SLIT(" W_ "),
- pprCLabel sty label, uppStr "[] = {"],
- uppNest 2 (uppInterleave uppComma (map (ppr_item sty) amodes)),
- uppStr "};" ]
- BEND
where
- ppr_item sty item = uppBeside (uppStr "(W_) ") (ppr_amode sty item)
-
-pprAbsC sty (CCostCentreDecl is_local cc) _ = uppCostCentreDecl sty is_local cc
-
-#ifdef DPH
--- Only used for debugging (i.e output abstractC instead of APAL)
-pprAbsC sty (CNativeInfoTableAndCode _ _ absC)
- = uppAboves [uppStr "CNativeInfoTableAndCode (DPH)",
- pprAbsC sty absC]
-#endif {- Data Parallel Haskell -}
+ pp_vector =
+ case (pprTempAndExternDecls stmt) of { (_, pp_exts) ->
+ vcat [
+ pp_exts,
+ hcat [ppLocalness label,
+ ptext SLIT(" vec_info_"), int size, space,
+ pprCLabel label, text "= { {"
+ ],
+ nest 2 (sep (punctuate comma (map ppr_item (reverse amodes))))
+ ] }
+
+ ppr_item item = (<>) (text "(F_) ") (ppr_amode item)
+ size = length amodes
+
+ type_str = case liveness of
+ LvSmall _ -> SLIT("RET_VEC_SMALL")
+ LvLarge _ -> SLIT("RET_VEC_BIG")
+
+
+pprAbsC (CCostCentreDecl is_local cc) _ = pprCostCentreDecl is_local cc
+pprAbsC (CCostCentreStackDecl ccs) _ = pprCostCentreStackDecl ccs
\end{code}
\begin{code}
ppLocalness label
- = uppBeside static const
+ = (<>) static const
where
- static = if (externallyVisibleCLabel label) then uppNil else uppPStr SLIT("static ")
- const = if not (isReadOnly label) then uppNil else uppPStr SLIT("const")
-
-ppLocalnessMacro for_fun{-vs data-} clabel
- = BIND (if externallyVisibleCLabel clabel then "E" else "I") _TO_ prefix ->
- BIND (if isReadOnly clabel then "RO_" else "") _TO_ suffix ->
- if for_fun
- then uppStr (prefix ++ "F_")
- else uppStr (prefix ++ "D_" ++ suffix)
- BEND BEND
+ static = if (externallyVisibleCLabel label)
+ then empty
+ else ptext SLIT("static ")
+ const = if not (isReadOnly label)
+ then empty
+ else ptext SLIT("const")
+
+-- Horrible macros for declaring the types and locality of labels (see
+-- StgMacros.h).
+
+ppLocalnessMacro clabel =
+ hcat [
+ char (if externallyVisibleCLabel clabel then 'E' else 'I'),
+ case labelType clabel of
+ InfoTblType -> ptext SLIT("I_")
+ ClosureType -> ptext SLIT("C_")
+ CodeType -> ptext SLIT("F_")
+ DataType -> ptext SLIT("D_") <>
+ if isReadOnly clabel
+ then ptext SLIT("RO_")
+ else empty
+ ]
\end{code}
\begin{code}
+jmp_lit = "JMP_("
+
grab_non_void_amodes amodes
= filter non_void amodes
non_void amode
- = case (getAmodeKind amode) of
- VoidKind -> False
+ = case (getAmodeRep amode) of
+ VoidRep -> False
k -> True
\end{code}
\begin{code}
-ppr_vol_regs :: PprStyle -> [MagicId] -> (Unpretty, Unpretty)
+ppr_vol_regs :: [MagicId] -> (SDoc, SDoc)
-ppr_vol_regs sty [] = (uppNil, uppNil)
-ppr_vol_regs sty (VoidReg:rs) = ppr_vol_regs sty rs
-ppr_vol_regs sty (r:rs)
+ppr_vol_regs [] = (empty, empty)
+ppr_vol_regs (VoidReg:rs) = ppr_vol_regs rs
+ppr_vol_regs (r:rs)
= let pp_reg = case r of
VanillaReg pk n -> pprVanillaReg n
- _ -> pprMagicId sty r
- (more_saves, more_restores) = ppr_vol_regs sty rs
+ _ -> pprMagicId r
+ (more_saves, more_restores) = ppr_vol_regs rs
in
- (uppAbove (uppBeside (uppPStr SLIT("CALLER_SAVE_")) pp_reg) more_saves,
- uppAbove (uppBeside (uppPStr SLIT("CALLER_RESTORE_")) pp_reg) more_restores)
+ (($$) ((<>) (ptext SLIT("CALLER_SAVE_")) pp_reg) more_saves,
+ ($$) ((<>) (ptext SLIT("CALLER_RESTORE_")) pp_reg) more_restores)
-- pp_basic_{saves,restores}: The BaseReg, SpA, SuA, SpB, SuB, Hp and
-- HpLim (see StgRegs.lh) may need to be saved/restored around CCalls,
-- depending on the platform. (The "volatile regs" stuff handles all
-- other registers.) Just be *sure* BaseReg is OK before trying to do
--- anything else.
+-- anything else. The correct sequence of saves&restores are
+-- encoded by the CALLER_*_SYSTEM macros.
pp_basic_saves
- = uppAboves [
- uppPStr SLIT("CALLER_SAVE_Base"),
- uppPStr SLIT("CALLER_SAVE_SpA"),
- uppPStr SLIT("CALLER_SAVE_SuA"),
- uppPStr SLIT("CALLER_SAVE_SpB"),
- uppPStr SLIT("CALLER_SAVE_SuB"),
- uppPStr SLIT("CALLER_SAVE_Ret"),
- uppPStr SLIT("CALLER_SAVE_Activity"),
- uppPStr SLIT("CALLER_SAVE_Hp"),
- uppPStr SLIT("CALLER_SAVE_HpLim") ]
-
-pp_basic_restores
- = uppAboves [
- uppPStr SLIT("CALLER_RESTORE_Base"), -- must be first!
- uppPStr SLIT("CALLER_RESTORE_SpA"),
- uppPStr SLIT("CALLER_RESTORE_SuA"),
- uppPStr SLIT("CALLER_RESTORE_SpB"),
- uppPStr SLIT("CALLER_RESTORE_SuB"),
- uppPStr SLIT("CALLER_RESTORE_Ret"),
- uppPStr SLIT("CALLER_RESTORE_Activity"),
- uppPStr SLIT("CALLER_RESTORE_Hp"),
- uppPStr SLIT("CALLER_RESTORE_HpLim"),
- uppPStr SLIT("CALLER_RESTORE_StdUpdRetVec"),
- uppPStr SLIT("CALLER_RESTORE_StkStub") ]
+ = vcat
+ [ ptext SLIT("CALLER_SAVE_Base")
+ , ptext SLIT("CALLER_SAVE_SYSTEM")
+ ]
+
+pp_basic_restores = ptext SLIT("CALLER_RESTORE_SYSTEM")
\end{code}
\begin{code}
-if_profiling sty pretty
- = case sty of
- PprForC sw_chker -> if sw_chker SccProfilingOn
- then pretty
- else uppChar '0' -- leave it out!
-
- _ -> {-print it anyway-} pretty
+has_srt (_, NoSRT) = False
+has_srt _ = True
+
+pp_srt_info srt =
+ case srt of
+ (lbl, NoSRT) ->
+ hcat [ int 0, comma,
+ int 0, comma,
+ int 0, comma ]
+ (lbl, SRT off len) ->
+ hcat [ pprCLabel lbl, comma,
+ int off, comma,
+ int len, comma ]
+\end{code}
+\begin{code}
+if_profiling pretty
+ = if opt_SccProfilingOn
+ then pretty
+ else char '0' -- leave it out!
-- ---------------------------------------------------------------------------
-- Changes for GrAnSim:
-- draw costs for computation in head of if into both branches;
--- as no abstractC data structure is given for the head, one is constructed
--- guessing unknown values and fed into the costs function
+-- as no abstractC data structure is given for the head, one is constructed
+-- guessing unknown values and fed into the costs function
-- ---------------------------------------------------------------------------
-do_if_stmt sty discrim tag alt_code deflt c
+do_if_stmt discrim tag alt_code deflt c
= case tag of
-- This special case happens when testing the result of a comparison.
-- We can just avoid some redundant clutter in the output.
- MachInt n _ | n==0 -> ppr_if_stmt sty (pprAmode sty discrim)
+ MachInt n _ | n==0 -> ppr_if_stmt (pprAmode discrim)
deflt alt_code
- (addrModeCosts discrim Rhs) c
+ (addrModeCosts discrim Rhs) c
other -> let
- cond = uppBesides [ pprAmode sty discrim,
- uppPStr SLIT(" == "),
- pprAmode sty (CLit tag) ]
+ cond = hcat [ pprAmode discrim
+ , ptext SLIT(" == ")
+ , tcast
+ , pprAmode (CLit tag)
+ ]
+ -- to be absolutely sure that none of the
+ -- conversion rules hit, e.g.,
+ --
+ -- minInt is different to (int)minInt
+ --
+ -- in C (when minInt is a number not a constant
+ -- expression which evaluates to it.)
+ --
+ tcast =
+ case other of
+ MachInt _ signed | signed -> ptext SLIT("(I_)")
+ _ -> empty
in
- ppr_if_stmt sty cond
+ ppr_if_stmt cond
alt_code deflt
(addrModeCosts discrim Rhs) c
-ppr_if_stmt sty pp_pred then_part else_part discrim_costs c
- = uppAboves [
- uppBesides [uppStr "if (", pp_pred, uppStr ") {"],
- uppNest 8 (pprAbsC sty then_part (c + discrim_costs +
- (Cost (0, 2, 0, 0, 0)) +
+ppr_if_stmt pp_pred then_part else_part discrim_costs c
+ = vcat [
+ hcat [text "if (", pp_pred, text ") {"],
+ nest 8 (pprAbsC then_part (c + discrim_costs +
+ (Cost (0, 2, 0, 0, 0)) +
costs then_part)),
- (case nonemptyAbsC else_part of Nothing -> uppNil; Just _ -> uppStr "} else {"),
- uppNest 8 (pprAbsC sty else_part (c + discrim_costs +
- (Cost (0, 1, 0, 0, 0)) +
+ (case nonemptyAbsC else_part of Nothing -> empty; Just _ -> text "} else {"),
+ nest 8 (pprAbsC else_part (c + discrim_costs +
+ (Cost (0, 1, 0, 0, 0)) +
costs else_part)),
- uppChar '}' ]
+ char '}' ]
{- Total costs = inherited costs (before if) + costs for accessing discrim
- + costs for cond branch ( = (0, 1, 0, 0, 0) )
+ + costs for cond branch ( = (0, 1, 0, 0, 0) )
+ costs for that alternative
-}
\end{code}
Some rough notes on generating code for @CCallOp@:
1) Evaluate all arguments and stuff them into registers. (done elsewhere)
-2) Save any essential registers (heap, stack, etc).
+2) Save any essential registers (heap, stack, etc).
ToDo: If stable pointers are in use, these must be saved in a place
where the runtime system can get at them so that the Stg world can
be restarted during the call.
3) Save any temporary registers that are currently in use.
-4) Do the call putting result into a local variable
+4) Do the call, putting result into a local variable
5) Restore essential registers
6) Restore temporaries
(This happens after restoration of essential registers because we
might need the @Base@ register to access all the others correctly.)
-7) If returning Malloc Pointer, build a closure containing the
- appropriate value.
-
Otherwise, copy local variable into result register.
8) If ccall (not casm), declare the function being called as extern so
basic_restores;
restores;
- #if MallocPtr
- constructMallocPtr(liveness, return_reg, _ccall_result);
- #else
- return_reg = _ccall_result;
- #end
+ return_reg = _ccall_result;
}
\end{pseudocode}
* make sure we save all our registers away where the garbage collector
can get at them.
* be sure that there are no live registers or we're in trouble.
- (This can cause problems if you try something foolish like passing
- an array or mallocptr to a _ccall_GC_ thing.)
+ (This can cause problems if you try something foolish like passing
+ an array or a foreign obj to a _ccall_GC_ thing.)
* increment/decrement the @inCCallGC@ counter before/after the call so
that the runtime check that PerformGC is being used sensibly will work.
\begin{code}
-pprCCall sty op@(CCallOp op_str is_asm may_gc _ _) args results liveness_mask vol_regs
- = if (may_gc && liveness_mask /= noLiveRegsMask)
- then panic ("Live register in _casm_GC_ \"" ++ casm_str ++ "\" " ++ (uppShow 80 (uppCat pp_non_void_args)) ++ "\n")
- else
--- trace ("casm \"" ++ casm_str ++ "\" " ++ (uppShow 80 (uppCat localVars)) ++ (uppShow 80 (uppCat pp_non_void_args)))
- uppAboves [
- uppChar '{',
+pprCCall op@(CCallOp op_str is_asm may_gc cconv) args results vol_regs
+ = vcat [
+ char '{',
declare_local_vars, -- local var for *result*
- uppAboves local_arg_decls,
- -- if is_asm then uppNil else declareExtern,
+ vcat local_arg_decls,
pp_save_context,
- process_casm local_vars pp_non_void_args casm_str,
+ declare_fun_extern, -- declare expected function type.
+ process_casm local_vars pp_non_void_args casm_str,
pp_restore_context,
assign_results,
- uppChar '}'
+ char '}'
]
where
- (pp_saves, pp_restores) = ppr_vol_regs sty vol_regs
- (pp_save_context, pp_restore_context) =
- if may_gc
- then ( uppStr "extern StgInt inCCallGC; SaveAllStgRegs(); inCCallGC++;",
- uppStr "inCCallGC--; RestoreAllStgRegs();")
- else ( pp_basic_saves `uppAbove` pp_saves,
- pp_basic_restores `uppAbove` pp_restores)
-
- non_void_args =
- let nvas = tail args
+ (pp_saves, pp_restores) = ppr_vol_regs vol_regs
+ (pp_save_context, pp_restore_context)
+ | may_gc = ( text "do { SaveThreadState();"
+ , text "LoadThreadState();} while(0);"
+ )
+ | otherwise = ( pp_basic_saves $$ pp_saves,
+ pp_basic_restores $$ pp_restores)
+
+ non_void_args =
+ let nvas = tail args
in ASSERT (all non_void nvas) nvas
- -- the first argument will be the "I/O world" token (a VoidKind)
+ -- the first argument will be the "I/O world" token (a VoidRep)
-- all others should be non-void
- non_void_results =
- let nvrs = grab_non_void_amodes results
+ non_void_results =
+ let nvrs = grab_non_void_amodes results
in ASSERT (length nvrs <= 1) nvrs
-- there will usually be two results: a (void) state which we
-- should ignore and a (possibly void) result.
(local_arg_decls, pp_non_void_args)
- = unzip [ ppr_casm_arg sty a i | (a,i) <- non_void_args `zip` [1..] ]
+ = unzip [ ppr_casm_arg a i | (a,i) <- non_void_args `zip` [1..] ]
+
+
+ {-
+ In the non-casm case, to ensure that we're entering the given external
+ entry point using the correct calling convention, we have to do the following:
+
+ - When entering via a function pointer (the `dynamic' case) using the specified
+ calling convention, we emit a typedefn declaration attributed with the
+ calling convention to use together with the result and parameter types we're
+ assuming. Coerce the function pointer to this type and go.
- pp_liveness = pprAmode sty (mkIntCLit liveness_mask)
+ - to enter the function at a given code label, we emit an extern declaration
+ for the label here, stating the calling convention together with result and
+ argument types we're assuming.
+
+ The C compiler will hopefully use this extern declaration to good effect,
+ reporting any discrepancies between our extern decl and any other that
+ may be in scope.
+
+ Re: calling convention, notice that gcc (2.8.1 and egcs-1.0.2) will for
+ the external function `foo' use the calling convention of the first `foo'
+ prototype it encounters (nor does it complain about conflicting attribute
+ declarations). The consequence of this is that you cannot override the
+ calling convention of `foo' using an extern declaration (you'd have to use
+ a typedef), but why you would want to do such a thing in the first place
+ is totally beyond me.
+
+ ToDo: petition the gcc folks to add code to warn about conflicting attribute
+ declarations.
+
+ -}
+ declare_fun_extern
+ | is_dynamic || is_asm || not opt_EmitCExternDecls = empty
+ | otherwise =
+ hsep [ typedef_or_extern
+ , ccall_res_ty
+ , fun_nm
+ , parens (hsep (punctuate comma ccall_decl_ty_args))
+ ] <> semi
+ where
+ typedef_or_extern
+ | is_dynamic = ptext SLIT("typedef")
+ | otherwise = ptext SLIT("extern")
+
+ fun_nm
+ | is_dynamic = parens (text (callConvAttribute cconv) <+> char '*' <> ccall_fun_ty)
+ | otherwise = text (callConvAttribute cconv) <+> ptext asm_str
+
+ -- leave out function pointer
+ ccall_decl_ty_args
+ | is_dynamic = tail ccall_arg_tys
+ | otherwise = ccall_arg_tys
+
+ ccall_arg_tys = map (text.showPrimRep.getAmodeRep) non_void_args
+
+ ccall_res_ty =
+ case non_void_results of
+ [] -> ptext SLIT("void")
+ [amode] -> text (showPrimRep (getAmodeRep amode))
+ _ -> panic "pprCCall: ccall_res_ty"
+
+ ccall_fun_ty =
+ ptext SLIT("_ccall_fun_ty") <>
+ case op_str of
+ Right u -> ppr u
+ _ -> empty
(declare_local_vars, local_vars, assign_results)
- = ppr_casm_results sty non_void_results pp_liveness
+ = ppr_casm_results non_void_results
- casm_str = if is_asm then _UNPK_ op_str else ccall_str
+ (Left asm_str) = op_str
+ is_dynamic =
+ case op_str of
+ Left _ -> False
+ _ -> True
+
+ casm_str = if is_asm then _UNPK_ asm_str else ccall_str
-- Remainder only used for ccall
- ccall_str = uppShow 80
- (uppBesides [
- if null non_void_results
- then uppNil
- else uppPStr SLIT("%r = "),
- uppLparen, uppPStr op_str, uppLparen,
- uppIntersperse uppComma ccall_args,
- uppStr "));"
+ fun_name
+ | is_dynamic = parens (parens (ccall_fun_ty) <> text "%0")
+ | otherwise = ptext asm_str
+
+ ccall_str = showSDoc
+ (hcat [
+ if null non_void_results
+ then empty
+ else text "%r = ",
+ lparen, fun_name, lparen,
+ hcat (punctuate comma ccall_fun_args),
+ text "));"
])
- num_args = length non_void_args
- ccall_args = take num_args [ uppBeside (uppChar '%') (uppInt i) | i <- [0..] ]
+
+ ccall_fun_args
+ | is_dynamic = tail ccall_args
+ | otherwise = ccall_args
+
+ ccall_args = zipWith (\ _ i -> char '%' <> int i) non_void_args [0..]
+
\end{code}
If the argument is a heap object, we need to reach inside and pull out
the bit the C world wants to see. The only heap objects which can be
-passed are @Array@s, @ByteArray@s and @MallocPtr@s.
+passed are @Array@s and @ByteArray@s.
\begin{code}
-ppr_casm_arg :: PprStyle -> CAddrMode -> Int -> (Unpretty, Unpretty)
+ppr_casm_arg :: CAddrMode -> Int -> (SDoc, SDoc)
-- (a) decl and assignment, (b) local var to be used later
-ppr_casm_arg sty amode a_num
+ppr_casm_arg amode a_num
= let
- a_kind = getAmodeKind amode
- pp_amode = pprAmode sty amode
- pp_kind = pprPrimKind sty a_kind
+ a_kind = getAmodeRep amode
+ pp_amode = pprAmode amode
+ pp_kind = pprPrimKind a_kind
- local_var = uppBeside (uppPStr SLIT("_ccall_arg")) (uppInt a_num)
+ local_var = (<>) (ptext SLIT("_ccall_arg")) (int a_num)
(arg_type, pp_amode2)
= case a_kind of
-- for array arguments, pass a pointer to the body of the array
-- (PTRS_ARR_CTS skips over all the header nonsense)
- ArrayKind -> (pp_kind,
- uppBesides [uppStr "PTRS_ARR_CTS(", pp_amode, uppRparen])
- ByteArrayKind -> (pp_kind,
- uppBesides [uppStr "BYTE_ARR_CTS(", pp_amode, uppRparen])
-
- -- for Malloc Pointers, use MALLOC_PTR_DATA to fish out the contents.
- MallocPtrKind -> (uppPStr SLIT("StgMallocPtr"),
- uppBesides [uppStr "MallocPtr_CLOSURE_DATA(", pp_amode, uppStr")"])
+ ArrayRep -> (pp_kind,
+ hcat [ptext SLIT("PTRS_ARR_CTS"),char '(', pp_amode, rparen])
+ ByteArrayRep -> (pp_kind,
+ hcat [ptext SLIT("BYTE_ARR_CTS"),char '(', pp_amode, rparen])
+
+ -- for ForeignObj, use FOREIGN_OBJ_DATA to fish out the contents.
+ ForeignObjRep -> (pp_kind,
+ hcat [ptext SLIT("ForeignObj_CLOSURE_DATA"),
+ char '(', pp_amode, char ')'])
+
other -> (pp_kind, pp_amode)
declare_local_var
- = uppBesides [ arg_type, uppSP, local_var, uppEquals, pp_amode2, uppSemi ]
+ = hcat [ arg_type, space, local_var, equals, pp_amode2, semi ]
in
(declare_local_var, local_var)
\end{code}
We only allow zero or one results.
-2) Is the result is a mallocptr?
+\begin{code}
+ppr_casm_results
+ :: [CAddrMode] -- list of results (length <= 1)
+ ->
+ ( SDoc, -- declaration of any local vars
+ [SDoc], -- list of result vars (same length as results)
+ SDoc ) -- assignment (if any) of results in local var to registers
- The mallocptr must be encapsulated immediately in a heap object.
+ppr_casm_results []
+ = (empty, [], empty) -- no results
-\begin{code}
-ppr_casm_results ::
- PprStyle -- style
- -> [CAddrMode] -- list of results (length <= 1)
- -> Unpretty -- liveness mask
- ->
- ( Unpretty, -- declaration of any local vars
- [Unpretty], -- list of result vars (same length as results)
- Unpretty ) -- assignment (if any) of results in local var to registers
-
-ppr_casm_results sty [] liveness
- = (uppNil, [], uppNil) -- no results
-
-ppr_casm_results sty [r] liveness
+ppr_casm_results [r]
= let
- result_reg = ppr_amode sty r
- r_kind = getAmodeKind r
+ result_reg = ppr_amode r
+ r_kind = getAmodeRep r
- local_var = uppPStr SLIT("_ccall_result")
+ local_var = ptext SLIT("_ccall_result")
(result_type, assign_result)
- = case r_kind of
- MallocPtrKind ->
- (uppPStr SLIT("StgMallocPtr"),
- uppBesides [ uppStr "constructMallocPtr(",
- liveness, uppComma,
- result_reg, uppComma,
- local_var,
- pp_paren_semi ])
- _ ->
- (pprPrimKind sty r_kind,
- uppBesides [ result_reg, uppEquals, local_var, uppSemi ])
-
- declare_local_var = uppBesides [ result_type, uppSP, local_var, uppSemi ]
- in
+ = (pprPrimKind r_kind,
+ hcat [ result_reg, equals, local_var, semi ])
+
+ declare_local_var = hcat [ result_type, space, local_var, semi ]
+ in
(declare_local_var, [local_var], assign_result)
-ppr_casm_results sty rs liveness
+ppr_casm_results rs
= panic "ppr_casm_results: ccall/casm with many results"
\end{code}
Note the sneaky way _the_ result is represented by a list so that we
can complain if it's used twice.
-ToDo: Any chance of giving line numbers when process-casm fails?
+ToDo: Any chance of giving line numbers when process-casm fails?
Or maybe we should do a check _much earlier_ in compiler. ADR
\begin{code}
-process_casm ::
- [Unpretty] -- results (length <= 1)
- -> [Unpretty] -- arguments
- -> String -- format string (with embedded %'s)
- ->
- Unpretty -- code being generated
+process_casm :: [SDoc] -- results (length <= 1)
+ -> [SDoc] -- arguments
+ -> String -- format string (with embedded %'s)
+ -> SDoc -- code being generated
process_casm results args string = process results args string
where
- process [] _ "" = uppNil
- process (_:_) _ "" = error ("process_casm: non-void result not assigned while processing _casm_ \"" ++ string ++ "\"\n(Try changing result type to PrimIO ()\n")
+ process [] _ "" = empty
+ process (_:_) _ "" = error ("process_casm: non-void result not assigned while processing _casm_ \"" ++
+ string ++
+ "\"\n(Try changing result type to PrimIO ()\n")
process ress args ('%':cs)
= case cs of
- [] ->
+ [] ->
error ("process_casm: lonely % while processing _casm_ \"" ++ string ++ "\".\n")
- ('%':css) ->
- uppBeside (uppChar '%') (process ress args css)
+ ('%':css) ->
+ char '%' <> process ress args css
- ('r':css) ->
+ ('r':css) ->
case ress of
[] -> error ("process_casm: no result to match %r while processing _casm_ \"" ++ string ++ "\".\nTry deleting %r or changing result type from PrimIO ()\n")
- [r] -> uppBeside r (process [] args css)
+ [r] -> r <> (process [] args css)
_ -> panic ("process_casm: casm with many results while processing _casm_ \"" ++ string ++ "\".\n")
other ->
- case readDec other of
- [(num,css)] ->
+ let
+ read_int :: ReadS Int
+ read_int = reads
+ in
+ case (read_int other) of
+ [(num,css)] ->
if 0 <= num && num < length args
- then uppBesides [uppLparen, args !! num, uppRparen,
- process ress args css]
- else error ("process_casm: no such arg #:"++(show num)++" while processing \"" ++ string ++ "\".\n")
+ then parens (args !! num) <> process ress args css
+ else error ("process_casm: no such arg #:"++(show num)++" while processing \"" ++ string ++ "\".\n")
_ -> error ("process_casm: not %<num> while processing _casm_ \"" ++ string ++ "\".\n")
process ress args (other_c:cs)
- = uppBeside (uppChar other_c) (process ress args cs)
+ = char other_c <> process ress args cs
\end{code}
%************************************************************************
First of all, the kind of the thing being assigned can be gotten from
the destination addressing mode. (It should be the same as the kind
of the source addressing mode.) If the kind of the assignment is of
-@VoidKind@, then don't generate any code at all.
+@VoidRep@, then don't generate any code at all.
\begin{code}
-pprAssign :: PprStyle -> PrimKind -> CAddrMode -> CAddrMode -> Unpretty
+pprAssign :: PrimRep -> CAddrMode -> CAddrMode -> SDoc
-pprAssign sty VoidKind dest src = uppNil
-
-#if 0
-pprAssign sty kind dest src
- | (kind /= getAmodeKind dest) || (kind /= getAmodeKind src)
- = uppCat [uppStr "Bad kind:", pprPrimKind sty kind,
- pprPrimKind sty (getAmodeKind dest), pprAmode sty dest,
- pprPrimKind sty (getAmodeKind src), pprAmode sty src]
-#endif
+pprAssign VoidRep dest src = empty
\end{code}
Special treatment for floats and doubles, to avoid unwanted conversions.
\begin{code}
-pprAssign sty FloatKind dest@(CVal reg_rel _) src
- = uppBesides [ uppStr "ASSIGN_FLT(", ppr_amode sty (CAddr reg_rel), uppComma, pprAmode sty src, pp_paren_semi ]
+pprAssign FloatRep dest@(CVal reg_rel _) src
+ = hcat [ ptext SLIT("ASSIGN_FLT"),char '(', ppr_amode (CAddr reg_rel), comma, pprAmode src, pp_paren_semi ]
+
+pprAssign DoubleRep dest@(CVal reg_rel _) src
+ = hcat [ ptext SLIT("ASSIGN_DBL"),char '(', ppr_amode (CAddr reg_rel), comma, pprAmode src, pp_paren_semi ]
-pprAssign sty DoubleKind dest@(CVal reg_rel _) src
- = uppBesides [ uppStr "ASSIGN_DBL(", ppr_amode sty (CAddr reg_rel), uppComma, pprAmode sty src, pp_paren_semi ]
+pprAssign Int64Rep dest@(CVal reg_rel _) src
+ = hcat [ ptext SLIT("ASSIGN_Int64"),char '(', ppr_amode (CAddr reg_rel), comma, pprAmode src, pp_paren_semi ]
+pprAssign Word64Rep dest@(CVal reg_rel _) src
+ = hcat [ ptext SLIT("ASSIGN_Word64"),char '(', ppr_amode (CAddr reg_rel), comma, pprAmode src, pp_paren_semi ]
\end{code}
Lastly, the question is: will the C compiler think the types of the
-two sides of the assignment match?
+two sides of the assignment match?
We assume that the types will match
if neither side is a @CVal@ addressing mode for any register
which can point into the heap or B stack.
Why? Because the heap and B stack are used to store miscellaneous things,
-whereas the A stack, temporaries, registers, etc., are only used for things
+whereas the A stack, temporaries, registers, etc., are only used for things
of fixed type.
\begin{code}
-pprAssign sty kind (CReg (VanillaReg _ dest)) (CReg (VanillaReg _ src))
- = uppBesides [ pprVanillaReg dest, uppEquals,
- pprVanillaReg src, uppSemi ]
+pprAssign kind (CReg (VanillaReg _ dest)) (CReg (VanillaReg _ src))
+ = hcat [ pprVanillaReg dest, equals,
+ pprVanillaReg src, semi ]
-pprAssign sty kind dest src
+pprAssign kind dest src
| mixedTypeLocn dest
-- Add in a cast to StgWord (a.k.a. W_) iff the destination is mixed
- = uppBesides [ ppr_amode sty dest, uppEquals,
- uppStr "(W_)(", -- Here is the cast
- ppr_amode sty src, pp_paren_semi ]
+ = hcat [ ppr_amode dest, equals,
+ text "(W_)(", -- Here is the cast
+ ppr_amode src, pp_paren_semi ]
-pprAssign sty kind dest src
- | mixedPtrLocn dest && getAmodeKind src /= PtrKind
+pprAssign kind dest src
+ | mixedPtrLocn dest && getAmodeRep src /= PtrRep
-- Add in a cast to StgPtr (a.k.a. P_) iff the destination is mixed
- = uppBesides [ ppr_amode sty dest, uppEquals,
- uppStr "(P_)(", -- Here is the cast
- ppr_amode sty src, pp_paren_semi ]
+ = hcat [ ppr_amode dest, equals,
+ text "(P_)(", -- Here is the cast
+ ppr_amode src, pp_paren_semi ]
-pprAssign sty ByteArrayKind dest src
+pprAssign ByteArrayRep dest src
| mixedPtrLocn src
- -- Add in a cast to StgPtr (a.k.a. B_) iff the source is mixed
- = uppBesides [ ppr_amode sty dest, uppEquals,
- uppStr "(B_)(", -- Here is the cast
- ppr_amode sty src, pp_paren_semi ]
-
-pprAssign sty kind other_dest src
- = uppBesides [ ppr_amode sty other_dest, uppEquals,
- pprAmode sty src, uppSemi ]
+ -- Add in a cast iff the source is mixed
+ = hcat [ ppr_amode dest, equals,
+ text "(StgByteArray)(", -- Here is the cast
+ ppr_amode src, pp_paren_semi ]
+
+pprAssign kind other_dest src
+ = hcat [ ppr_amode other_dest, equals,
+ pprAmode src, semi ]
\end{code}
@pprAmode@.
\begin{code}
-pprAmode, ppr_amode :: PprStyle -> CAddrMode -> Unpretty
+pprAmode, ppr_amode :: CAddrMode -> SDoc
\end{code}
For reasons discussed above under assignments, @CVal@ modes need
question.)
\begin{code}
-pprAmode sty (CVal reg_rel FloatKind)
- = uppBesides [ uppStr "PK_FLT(", ppr_amode sty (CAddr reg_rel), uppRparen ]
-pprAmode sty (CVal reg_rel DoubleKind)
- = uppBesides [ uppStr "PK_DBL(", ppr_amode sty (CAddr reg_rel), uppRparen ]
+pprAmode (CVal reg_rel FloatRep)
+ = hcat [ text "PK_FLT(", ppr_amode (CAddr reg_rel), rparen ]
+pprAmode (CVal reg_rel DoubleRep)
+ = hcat [ text "PK_DBL(", ppr_amode (CAddr reg_rel), rparen ]
+pprAmode (CVal reg_rel Int64Rep)
+ = hcat [ text "PK_Int64(", ppr_amode (CAddr reg_rel), rparen ]
+pprAmode (CVal reg_rel Word64Rep)
+ = hcat [ text "PK_Word64(", ppr_amode (CAddr reg_rel), rparen ]
\end{code}
-Next comes the case where there is some other cast need, and the
+Next comes the case where there is some other cast need, and the
no-cast case:
\begin{code}
-pprAmode sty amode
+pprAmode amode
| mixedTypeLocn amode
- = uppBesides [ uppLparen, pprPrimKind sty (getAmodeKind amode), uppStr ")(",
- ppr_amode sty amode, uppRparen]
+ = parens (hcat [ pprPrimKind (getAmodeRep amode), ptext SLIT(")("),
+ ppr_amode amode ])
| otherwise -- No cast needed
- = ppr_amode sty amode
+ = ppr_amode amode
\end{code}
Now the rest of the cases for ``workhorse'' @ppr_amode@:
\begin{code}
-ppr_amode sty (CVal reg_rel _)
- = case (pprRegRelative sty False{-no sign wanted-} reg_rel) of
- (pp_reg, Nothing) -> uppBeside (uppChar '*') pp_reg
- (pp_reg, Just offset) -> uppBesides [ pp_reg, uppLbrack, offset, uppRbrack ]
+ppr_amode (CVal reg_rel _)
+ = case (pprRegRelative False{-no sign wanted-} reg_rel) of
+ (pp_reg, Nothing) -> (<>) (char '*') pp_reg
+ (pp_reg, Just offset) -> hcat [ pp_reg, brackets offset ]
-ppr_amode sty (CAddr reg_rel)
- = case (pprRegRelative sty True{-sign wanted-} reg_rel) of
+ppr_amode (CAddr reg_rel)
+ = case (pprRegRelative True{-sign wanted-} reg_rel) of
(pp_reg, Nothing) -> pp_reg
- (pp_reg, Just offset) -> uppBeside pp_reg offset
-
-ppr_amode sty (CReg magic_id) = pprMagicId sty magic_id
+ (pp_reg, Just offset) -> (<>) pp_reg offset
-ppr_amode sty (CTemp uniq kind) = prettyToUn (pprUnique uniq)
+ppr_amode (CReg magic_id) = pprMagicId magic_id
-ppr_amode sty (CLbl label kind) = pprCLabel sty label
+ppr_amode (CTemp uniq kind) = char '_' <> pprUnique uniq <> char '_'
-ppr_amode sty (CUnVecLbl direct vectored)
- = uppBesides [uppStr "(StgRetAddr) UNVEC(", pprCLabel sty direct, uppComma,
- pprCLabel sty vectored, uppRparen]
+ppr_amode (CLbl label kind) = pprCLabelAddr label
-ppr_amode sty (CCharLike char)
- = uppBesides [uppStr "CHARLIKE_CLOSURE(", pprAmode sty char, uppRparen ]
-ppr_amode sty (CIntLike int)
- = uppBesides [uppStr "INTLIKE_CLOSURE(", pprAmode sty int, uppRparen ]
+ppr_amode (CCharLike ch)
+ = hcat [ptext SLIT("CHARLIKE_CLOSURE"), char '(', pprAmode ch, rparen ]
+ppr_amode (CIntLike int)
+ = hcat [ptext SLIT("INTLIKE_CLOSURE"), char '(', pprAmode int, rparen ]
-ppr_amode sty (CString str) = uppBesides [uppChar '"', uppStr (stringToC (_UNPK_ str)), uppChar '"']
+ppr_amode (CString str) = hcat [char '"', text (stringToC (_UNPK_ str)), char '"']
-- ToDo: are these *used* for anything?
-ppr_amode sty (CLit lit) = pprBasicLit sty lit
-
-ppr_amode sty (CLitLit str _) = uppPStr str
-
-ppr_amode sty (COffset off) = pprHeapOffset sty off
+ppr_amode (CLit lit) = pprBasicLit lit
-ppr_amode sty (CCode abs_C)
- = uppAboves [ uppStr "{ -- CCode", uppNest 8 (pprAbsC sty abs_C (costs abs_C)), uppChar '}' ]
+ppr_amode (CLitLit str _) = ptext str
-ppr_amode sty (CLabelledCode label abs_C)
- = uppAboves [ uppBesides [pprCLabel sty label, uppStr " = { -- CLabelledCode"],
- uppNest 8 (pprAbsC sty abs_C (costs abs_C)), uppChar '}' ]
-
-ppr_amode sty (CJoinPoint _ _)
+ppr_amode (CJoinPoint _)
= panic "ppr_amode: CJoinPoint"
-ppr_amode sty (CTableEntry base index kind)
- = uppBesides [uppStr "((", pprPrimKind sty kind, uppStr " *)(",
- ppr_amode sty base, uppStr "))[(I_)(", ppr_amode sty index,
- uppStr ")]"]
+ppr_amode (CTableEntry base index kind)
+ = hcat [text "((", pprPrimKind kind, text " *)(",
+ ppr_amode base, text "))[(I_)(", ppr_amode index,
+ ptext SLIT(")]")]
+
+ppr_amode (CMacroExpr pk macro as)
+ = parens (pprPrimKind pk) <+>
+ parens (text (show macro) <>
+ parens (hcat (punctuate comma (map pprAmode as))))
+\end{code}
-ppr_amode sty (CMacroExpr pk macro as)
- = uppBesides [uppLparen, pprPrimKind sty pk, uppStr ")(", uppStr (show macro), uppLparen,
- uppIntersperse uppComma (map (pprAmode sty) as), uppStr "))"]
+%************************************************************************
+%* *
+\subsection[ppr-liveness-masks]{Liveness Masks}
+%* *
+%************************************************************************
-ppr_amode sty (CCostCentre cc print_as_string)
- = uppCostCentre sty print_as_string cc
+\begin{code}
+pp_liveness :: Liveness -> SDoc
+pp_liveness lv =
+ case lv of
+ LvSmall mask -> int (intBS mask)
+ LvLarge lbl -> char '&' <> pprCLabel lbl
\end{code}
%************************************************************************
%* *
%************************************************************************
-@pprRegRelative@ returns a pair of the @Unpretty@ for the register
-(some casting may be required), and a @Maybe Unpretty@ for the offset
+@pprRegRelative@ returns a pair of the @Doc@ for the register
+(some casting may be required), and a @Maybe Doc@ for the offset
(zero offset gives a @Nothing@).
\begin{code}
-addPlusSign :: Bool -> Unpretty -> Unpretty
+addPlusSign :: Bool -> SDoc -> SDoc
addPlusSign False p = p
-addPlusSign True p = uppBeside (uppChar '+') p
+addPlusSign True p = (<>) (char '+') p
-pprSignedInt :: Bool -> Int -> Maybe Unpretty -- Nothing => 0
+pprSignedInt :: Bool -> Int -> Maybe SDoc -- Nothing => 0
pprSignedInt sign_wanted n
- = if n == 0 then Nothing else
- if n > 0 then Just (addPlusSign sign_wanted (uppInt n))
- else Just (uppInt n)
+ = if n == 0 then Nothing else
+ if n > 0 then Just (addPlusSign sign_wanted (int n))
+ else Just (int n)
-pprRegRelative :: PprStyle
- -> Bool -- True <=> Print leading plus sign (if +ve)
- -> RegRelative
- -> (Unpretty, Maybe Unpretty)
+pprRegRelative :: Bool -- True <=> Print leading plus sign (if +ve)
+ -> RegRelative
+ -> (SDoc, Maybe SDoc)
-pprRegRelative sty sign_wanted r@(SpARel spA off)
- = (pprMagicId sty SpA, pprSignedInt sign_wanted (spARelToInt r))
+pprRegRelative sign_wanted (SpRel off)
+ = (pprMagicId Sp, pprSignedInt sign_wanted (I# off))
-pprRegRelative sty sign_wanted r@(SpBRel spB off)
- = (pprMagicId sty SpB, pprSignedInt sign_wanted (spBRelToInt r))
-
-pprRegRelative sty sign_wanted r@(HpRel hp off)
- = let to_print = hp `subOff` off
- pp_Hp = pprMagicId sty Hp
+pprRegRelative sign_wanted r@(HpRel o)
+ = let pp_Hp = pprMagicId Hp; off = I# o
in
- if isZeroOff to_print then
+ if off == 0 then
(pp_Hp, Nothing)
else
- (pp_Hp, Just (uppBeside (uppChar '-') (pprHeapOffset sty to_print)))
- -- No parens needed because pprHeapOffset
- -- does them when necessary
+ (pp_Hp, Just ((<>) (char '-') (int off)))
-pprRegRelative sty sign_wanted (NodeRel off)
- = let pp_Node = pprMagicId sty node
+pprRegRelative sign_wanted (NodeRel o)
+ = let pp_Node = pprMagicId node; off = I# o
in
- if isZeroOff off then
+ if off == 0 then
(pp_Node, Nothing)
else
- (pp_Node, Just (addPlusSign sign_wanted (pprHeapOffset sty off)))
+ (pp_Node, Just (addPlusSign sign_wanted (int off)))
\end{code}
@pprMagicId@ just prints the register name. @VanillaReg@ registers are
-represented by a discriminated union (@StgUnion@), so we use the @PrimKind@
+represented by a discriminated union (@StgUnion@), so we use the @PrimRep@
to select the union tag.
\begin{code}
-pprMagicId :: PprStyle -> MagicId -> Unpretty
-
-pprMagicId sty BaseReg = uppPStr SLIT("BaseReg")
-pprMagicId sty StkOReg = uppPStr SLIT("StkOReg")
-pprMagicId sty (VanillaReg pk n)
- = uppBesides [ pprVanillaReg n, uppChar '.',
- pprUnionTag pk ]
-pprMagicId sty (FloatReg n) = uppBeside (uppPStr SLIT("FltReg")) (uppInt IBOX(n))
-pprMagicId sty (DoubleReg n) = uppBeside (uppPStr SLIT("DblReg")) (uppInt IBOX(n))
-pprMagicId sty TagReg = uppPStr SLIT("TagReg")
-pprMagicId sty RetReg = uppPStr SLIT("RetReg")
-pprMagicId sty SpA = uppPStr SLIT("SpA")
-pprMagicId sty SuA = uppPStr SLIT("SuA")
-pprMagicId sty SpB = uppPStr SLIT("SpB")
-pprMagicId sty SuB = uppPStr SLIT("SuB")
-pprMagicId sty Hp = uppPStr SLIT("Hp")
-pprMagicId sty HpLim = uppPStr SLIT("HpLim")
-pprMagicId sty LivenessReg = uppPStr SLIT("LivenessReg")
-pprMagicId sty ActivityReg = uppPStr SLIT("ActivityReg")
-pprMagicId sty StdUpdRetVecReg = uppPStr SLIT("StdUpdRetVecReg")
-pprMagicId sty StkStubReg = uppPStr SLIT("StkStubReg")
-pprMagicId sty CurCostCentre = uppPStr SLIT("CCC")
-pprMagicId sty VoidReg = {-uppStr "RetVoid!"-} panic "pprMagicId:VoidReg!"
-#ifdef DPH
-pprMagicId sty (DataReg _ n) = uppBeside (uppPStr SLIT("RD")) (uppInt n)
-#endif {- Data Parallel Haskell -}
-
-pprVanillaReg :: FAST_INT -> Unpretty
-
-pprVanillaReg n = uppBeside (uppChar 'R') (uppInt IBOX(n))
-
-pprUnionTag :: PrimKind -> Unpretty
-
-pprUnionTag PtrKind = uppChar 'p'
-pprUnionTag CodePtrKind = uppPStr SLIT("fp")
-pprUnionTag DataPtrKind = uppChar 'd'
-pprUnionTag RetKind = uppChar 'r'
-pprUnionTag InfoPtrKind = uppChar 'd'
-pprUnionTag CostCentreKind = panic "pprUnionTag:CostCentre?"
-
-pprUnionTag CharKind = uppChar 'c'
-pprUnionTag IntKind = uppChar 'i'
-pprUnionTag WordKind = uppChar 'w'
-pprUnionTag AddrKind = uppChar 'v'
-pprUnionTag FloatKind = uppChar 'f'
-pprUnionTag DoubleKind = panic "pprUnionTag:Double?"
-
-pprUnionTag StablePtrKind = uppChar 'i'
-pprUnionTag MallocPtrKind = uppChar 'p'
-
-pprUnionTag ArrayKind = uppChar 'p'
-pprUnionTag ByteArrayKind = uppChar 'b'
+pprMagicId :: MagicId -> SDoc
+
+pprMagicId BaseReg = ptext SLIT("BaseReg")
+pprMagicId (VanillaReg pk n)
+ = hcat [ pprVanillaReg n, char '.',
+ pprUnionTag pk ]
+pprMagicId (FloatReg n) = (<>) (ptext SLIT("F")) (int IBOX(n))
+pprMagicId (DoubleReg n) = (<>) (ptext SLIT("D")) (int IBOX(n))
+pprMagicId (LongReg _ n) = (<>) (ptext SLIT("L")) (int IBOX(n))
+pprMagicId Sp = ptext SLIT("Sp")
+pprMagicId Su = ptext SLIT("Su")
+pprMagicId SpLim = ptext SLIT("SpLim")
+pprMagicId Hp = ptext SLIT("Hp")
+pprMagicId HpLim = ptext SLIT("HpLim")
+pprMagicId CurCostCentre = ptext SLIT("CCCS")
+pprMagicId VoidReg = panic "pprMagicId:VoidReg!"
+
+pprVanillaReg :: FAST_INT -> SDoc
+pprVanillaReg n = (<>) (char 'R') (int IBOX(n))
+
+pprUnionTag :: PrimRep -> SDoc
+
+pprUnionTag PtrRep = char 'p'
+pprUnionTag CodePtrRep = ptext SLIT("fp")
+pprUnionTag DataPtrRep = char 'd'
+pprUnionTag RetRep = char 'p'
+pprUnionTag CostCentreRep = panic "pprUnionTag:CostCentre?"
+
+pprUnionTag CharRep = char 'c'
+pprUnionTag IntRep = char 'i'
+pprUnionTag WordRep = char 'w'
+pprUnionTag AddrRep = char 'a'
+pprUnionTag FloatRep = char 'f'
+pprUnionTag DoubleRep = panic "pprUnionTag:Double?"
+
+pprUnionTag StablePtrRep = char 'i'
+pprUnionTag StableNameRep = char 'p'
+pprUnionTag WeakPtrRep = char 'p'
+pprUnionTag ForeignObjRep = char 'p'
+
+pprUnionTag ThreadIdRep = char 't'
+
+pprUnionTag ArrayRep = char 'p'
+pprUnionTag ByteArrayRep = char 'b'
pprUnionTag _ = panic "pprUnionTag:Odd kind"
-
\end{code}
Find and print local and external declarations for a list of
Abstract~C statements.
\begin{code}
-pprTempAndExternDecls :: AbstractC -> (Unpretty{-temps-}, Unpretty{-externs-})
-pprTempAndExternDecls AbsCNop = (uppNil, uppNil)
+pprTempAndExternDecls :: AbstractC -> (SDoc{-temps-}, SDoc{-externs-})
+pprTempAndExternDecls AbsCNop = (empty, empty)
pprTempAndExternDecls (AbsCStmts stmt1 stmt2)
= initTE (ppr_decls_AbsC stmt1 `thenTE` \ (t_p1, e_p1) ->
ppr_decls_AbsC stmt2 `thenTE` \ (t_p2, e_p2) ->
- BIND (catMaybes [t_p1, t_p2]) _TO_ real_temps ->
- BIND (catMaybes [e_p1, e_p2]) _TO_ real_exts ->
- returnTE (uppAboves real_temps, uppAboves real_exts)
- BEND BEND
+ case (catMaybes [t_p1, t_p2]) of { real_temps ->
+ case (catMaybes [e_p1, e_p2]) of { real_exts ->
+ returnTE (vcat real_temps, vcat real_exts) }}
)
pprTempAndExternDecls other_stmt
= initTE (ppr_decls_AbsC other_stmt `thenTE` \ (maybe_t, maybe_e) ->
returnTE (
case maybe_t of
- Nothing -> uppNil
+ Nothing -> empty
Just pp -> pp,
case maybe_e of
- Nothing -> uppNil
+ Nothing -> empty
Just pp -> pp )
)
-pprBasicLit :: PprStyle -> BasicLit -> Unpretty
-pprPrimKind :: PprStyle -> PrimKind -> Unpretty
+pprBasicLit :: Literal -> SDoc
+pprPrimKind :: PrimRep -> SDoc
-pprBasicLit sty lit = uppStr (showBasicLit sty lit)
-pprPrimKind sty k = uppStr (showPrimKind k)
+pprBasicLit lit = ppr lit
+pprPrimKind k = ppr k
\end{code}
emptyCLabelSet = emptyFM
x `elementOfCLabelSet` labs
= case (lookupFM labs x) of { Just _ -> True; Nothing -> False }
-addToCLabelSet set x = addToFM set x ()
-type UniqueSet = UniqFM ()
-emptyUniqueSet = emptyUFM
-x `elementOfUniqueSet` us
- = case (lookupDirectlyUFM us x) of { Just _ -> True; Nothing -> False }
-addToUniqueSet set x = set `plusUFM` singletonDirectlyUFM x ()
+addToCLabelSet set x = addToFM set x ()
-type TEenv = (UniqueSet, CLabelSet)
+type TEenv = (UniqSet Unique, CLabelSet)
type TeM result = TEenv -> (TEenv, result)
initTE :: TeM a -> a
initTE sa
- = case sa (emptyUniqueSet, emptyCLabelSet) of { (_, result) ->
+ = case sa (emptyUniqSet, emptyCLabelSet) of { (_, result) ->
result }
-#ifdef __GLASGOW_HASKELL__
{-# INLINE thenTE #-}
{-# INLINE returnTE #-}
-#endif
thenTE :: TeM a -> (a -> TeM b) -> TeM b
thenTE a b u
tempSeenTE :: Unique -> TeM Bool
tempSeenTE uniq env@(seen_uniqs, seen_labels)
- = if (uniq `elementOfUniqueSet` seen_uniqs)
+ = if (uniq `elementOfUniqSet` seen_uniqs)
then (env, True)
- else ((addToUniqueSet seen_uniqs uniq,
+ else ((addOneToUniqSet seen_uniqs uniq,
seen_labels),
False)
\end{code}
\begin{code}
-pprTempDecl :: Unique -> PrimKind -> Unpretty
+pprTempDecl :: Unique -> PrimRep -> SDoc
pprTempDecl uniq kind
- = uppBesides [ pprPrimKind PprDebug kind, uppSP, prettyToUn (pprUnique uniq), uppSemi ]
+ = hcat [ pprPrimKind kind, space, char '_', pprUnique uniq, ptext SLIT("_;") ]
-ppr_for_C = PprForC ( \ x -> False ) -- pretend no special cmd-line flags
-
-pprExternDecl :: CLabel -> PrimKind -> Unpretty
+pprExternDecl :: CLabel -> PrimRep -> SDoc
pprExternDecl clabel kind
= if not (needsCDecl clabel) then
- uppNil -- do not print anything for "known external" things (e.g., < PreludeCore)
- else
- BIND (
- case kind of
- CodePtrKind -> ppLocalnessMacro True{-function-} clabel
- _ -> ppLocalnessMacro False{-data-} clabel
- ) _TO_ pp_macro_str ->
-
- uppBesides [ pp_macro_str, uppLparen, pprCLabel ppr_for_C clabel, pp_paren_semi ]
- BEND
+ empty -- do not print anything for "known external" things
+ else
+ hcat [ ppLocalnessMacro clabel,
+ lparen, pprCLabel clabel, pp_paren_semi ]
\end{code}
\begin{code}
-ppr_decls_AbsC :: AbstractC -> TeM (Maybe Unpretty{-temps-}, Maybe Unpretty{-externs-})
+ppr_decls_AbsC :: AbstractC -> TeM (Maybe SDoc{-temps-}, Maybe SDoc{-externs-})
ppr_decls_AbsC AbsCNop = returnTE (Nothing, Nothing)
ppr_decls_AbsC (AbsCStmts stmts_1 stmts_2)
= ppr_decls_AbsC stmts_1 `thenTE` \ p1 ->
ppr_decls_AbsC stmts_2 `thenTE` \ p2 ->
- returnTE (maybe_uppAboves [p1, p2])
-
-ppr_decls_AbsC (CClosureUpdInfo info)
- = ppr_decls_AbsC info
-
---UNUSED: ppr_decls_AbsC (CComment comment) = returnTE (Nothing, Nothing)
+ returnTE (maybe_vcat [p1, p2])
ppr_decls_AbsC (CSplitMarker) = returnTE (Nothing, Nothing)
ppr_decls_AbsC (CAssign dest source)
= ppr_decls_Amode dest `thenTE` \ p1 ->
ppr_decls_Amode source `thenTE` \ p2 ->
- returnTE (maybe_uppAboves [p1, p2])
+ returnTE (maybe_vcat [p1, p2])
ppr_decls_AbsC (CJump target) = ppr_decls_Amode target
= ppr_decls_Amode discrim `thenTE` \ pdisc ->
mapTE ppr_alt_stuff alts `thenTE` \ palts ->
ppr_decls_AbsC deflt `thenTE` \ pdeflt ->
- returnTE (maybe_uppAboves (pdisc:pdeflt:palts))
+ returnTE (maybe_vcat (pdisc:pdeflt:palts))
where
ppr_alt_stuff (_, absC) = ppr_decls_AbsC absC
ppr_decls_AbsC (CCodeBlock label absC)
= ppr_decls_AbsC absC
-ppr_decls_AbsC (CInitHdr cl_info reg_rel cost_centre inplace_upd)
+ppr_decls_AbsC (CInitHdr cl_info reg_rel cost_centre)
-- ToDo: strictly speaking, should chk "cost_centre" amode
= labelSeenTE info_lbl `thenTE` \ label_seen ->
returnTE (Nothing,
if label_seen then
Nothing
else
- Just (pprExternDecl info_lbl PtrKind))
+ Just (pprExternDecl info_lbl PtrRep))
where
info_lbl = infoTableLabelFromCI cl_info
-ppr_decls_AbsC (COpStmt results _ args _ _) = ppr_decls_Amodes (results ++ args)
+ppr_decls_AbsC (COpStmt results _ args _) = ppr_decls_Amodes (results ++ args)
ppr_decls_AbsC (CSimultaneous abc) = ppr_decls_AbsC abc
+ppr_decls_AbsC (CCheck _ amodes code) =
+ ppr_decls_Amodes amodes `thenTE` \p1 ->
+ ppr_decls_AbsC code `thenTE` \p2 ->
+ returnTE (maybe_vcat [p1,p2])
+
ppr_decls_AbsC (CMacroStmt _ amodes) = ppr_decls_Amodes amodes
ppr_decls_AbsC (CCallProfCtrMacro _ amodes) = ppr_decls_Amodes [] -- *****!!!
-- ToDo: strictly speaking, should chk "cost_centre" amode
= ppr_decls_Amodes amodes
-ppr_decls_AbsC (CClosureInfoAndCode cl_info slow maybe_fast upd_lbl closure_descr)
- = ppr_decls_Amodes [entry_lbl, upd_lbl] `thenTE` \ p1 ->
+ppr_decls_AbsC (CClosureInfoAndCode cl_info slow maybe_fast _ _)
+ = ppr_decls_Amodes [entry_lbl] `thenTE` \ p1 ->
ppr_decls_AbsC slow `thenTE` \ p2 ->
(case maybe_fast of
- Nothing -> returnTE (Nothing, Nothing)
- Just fast -> ppr_decls_AbsC fast) `thenTE` \ p3 ->
- returnTE (maybe_uppAboves [p1, p2, p3])
+ Nothing -> returnTE (Nothing, Nothing)
+ Just fast -> ppr_decls_AbsC fast) `thenTE` \ p3 ->
+ returnTE (maybe_vcat [p1, p2, p3])
where
- entry_lbl = CLbl slow_lbl CodePtrKind
+ entry_lbl = CLbl slow_lbl CodePtrRep
slow_lbl = case (nonemptyAbsC slow) of
Nothing -> mkErrorStdEntryLabel
Just _ -> entryLabelFromCI cl_info
-ppr_decls_AbsC (CRetVector label maybe_amodes absC)
- = ppr_decls_Amodes (catMaybes maybe_amodes) `thenTE` \ p1 ->
- ppr_decls_AbsC absC `thenTE` \ p2 ->
- returnTE (maybe_uppAboves [p1, p2])
-
-ppr_decls_AbsC (CRetUnVector label amode)
- = ppr_decls_Amode amode
-
-ppr_decls_AbsC (CFlatRetVector label amodes)
- = ppr_decls_Amodes amodes
+ppr_decls_AbsC (CSRT lbl closure_lbls)
+ = mapTE labelSeenTE closure_lbls `thenTE` \ seen ->
+ returnTE (Nothing,
+ if and seen then Nothing
+ else Just (vcat [ pprExternDecl l PtrRep
+ | (l,False) <- zip closure_lbls seen ]))
-#ifdef DPH
-ppr_decls_AbsC (CNativeInfoTableAndCode _ _ absC)
- = ppr_decls_AbsC absC
-#endif {- Data Parallel Haskell -}
+ppr_decls_AbsC (CRetDirect _ code _ _) = ppr_decls_AbsC code
+ppr_decls_AbsC (CRetVector _ amodes _ _) = ppr_decls_Amodes amodes
\end{code}
\begin{code}
-ppr_decls_Amode :: CAddrMode -> TeM (Maybe Unpretty, Maybe Unpretty)
+ppr_decls_Amode :: CAddrMode -> TeM (Maybe SDoc, Maybe SDoc)
ppr_decls_Amode (CVal _ _) = returnTE (Nothing, Nothing)
ppr_decls_Amode (CAddr _) = returnTE (Nothing, Nothing)
ppr_decls_Amode (CReg _) = returnTE (Nothing, Nothing)
ppr_decls_Amode (CString _) = returnTE (Nothing, Nothing)
ppr_decls_Amode (CLit _) = returnTE (Nothing, Nothing)
ppr_decls_Amode (CLitLit _ _) = returnTE (Nothing, Nothing)
-ppr_decls_Amode (COffset _) = returnTE (Nothing, Nothing)
-- CIntLike must be a literal -- no decls
ppr_decls_Amode (CIntLike int) = returnTE (Nothing, Nothing)
-- now, the only place where we actually print temps/externs...
ppr_decls_Amode (CTemp uniq kind)
= case kind of
- VoidKind -> returnTE (Nothing, Nothing)
+ VoidRep -> returnTE (Nothing, Nothing)
other ->
tempSeenTE uniq `thenTE` \ temp_seen ->
returnTE
(if temp_seen then Nothing else Just (pprTempDecl uniq kind), Nothing)
-ppr_decls_Amode (CLbl label VoidKind)
+ppr_decls_Amode (CLbl label VoidRep)
= returnTE (Nothing, Nothing)
ppr_decls_Amode (CLbl label kind)
returnTE (Nothing,
if label_seen then Nothing else Just (pprExternDecl label kind))
-{- WRONG:
-ppr_decls_Amode (CUnVecLbl direct vectored)
- = labelSeenTE direct `thenTE` \ dlbl_seen ->
- labelSeenTE vectored `thenTE` \ vlbl_seen ->
- let
- ddcl = if dlbl_seen then uppNil else pprExternDecl direct CodePtrKind
- vdcl = if vlbl_seen then uppNil else pprExternDecl vectored DataPtrKind
- in
- returnTE (Nothing,
- if (dlbl_seen || not (needsCDecl direct)) &&
- (vlbl_seen || not (needsCDecl vectored)) then Nothing
- else Just (uppBesides [uppStr "UNVEC(", ddcl, uppComma, vdcl, uppRparen]))
--}
-
-ppr_decls_Amode (CUnVecLbl direct vectored)
- = -- We don't mark either label as "seen", because
- -- we don't know which one will be used and which one tossed
- -- by the C macro...
- --labelSeenTE direct `thenTE` \ dlbl_seen ->
- --labelSeenTE vectored `thenTE` \ vlbl_seen ->
- let
- ddcl = {-if dlbl_seen then uppNil else-} pprExternDecl direct CodePtrKind
- vdcl = {-if vlbl_seen then uppNil else-} pprExternDecl vectored DataPtrKind
- in
- returnTE (Nothing,
- if ({-dlbl_seen ||-} not (needsCDecl direct)) &&
- ({-vlbl_seen ||-} not (needsCDecl vectored)) then Nothing
- else Just (uppBesides [uppStr "UNVEC(", ddcl, uppComma, vdcl, uppRparen]))
-
ppr_decls_Amode (CTableEntry base index _)
= ppr_decls_Amode base `thenTE` \ p1 ->
ppr_decls_Amode index `thenTE` \ p2 ->
- returnTE (maybe_uppAboves [p1, p2])
+ returnTE (maybe_vcat [p1, p2])
ppr_decls_Amode (CMacroExpr _ _ amodes)
= ppr_decls_Amodes amodes
ppr_decls_Amode other = returnTE (Nothing, Nothing)
-maybe_uppAboves :: [(Maybe Unpretty, Maybe Unpretty)] -> (Maybe Unpretty, Maybe Unpretty)
-maybe_uppAboves ps
- = BIND (unzip ps) _TO_ (ts, es) ->
- BIND (catMaybes ts) _TO_ real_ts ->
- BIND (catMaybes es) _TO_ real_es ->
- (if (null real_ts) then Nothing else Just (uppAboves real_ts),
- if (null real_es) then Nothing else Just (uppAboves real_es))
- BEND BEND BEND
+maybe_vcat :: [(Maybe SDoc, Maybe SDoc)] -> (Maybe SDoc, Maybe SDoc)
+maybe_vcat ps
+ = case (unzip ps) of { (ts, es) ->
+ case (catMaybes ts) of { real_ts ->
+ case (catMaybes es) of { real_es ->
+ (if (null real_ts) then Nothing else Just (vcat real_ts),
+ if (null real_es) then Nothing else Just (vcat real_es))
+ } } }
\end{code}
\begin{code}
-ppr_decls_Amodes :: [CAddrMode] -> TeM (Maybe Unpretty, Maybe Unpretty)
+ppr_decls_Amodes :: [CAddrMode] -> TeM (Maybe SDoc, Maybe SDoc)
ppr_decls_Amodes amodes
= mapTE ppr_decls_Amode amodes `thenTE` \ ps ->
- returnTE ( maybe_uppAboves ps )
+ returnTE ( maybe_vcat ps )
+\end{code}
+
+Print out a C Label where you want the *address* of the label, not the
+object it refers to. The distinction is important when the label may
+refer to a C structure (info tables and closures, for instance).
+
+When just generating a declaration for the label, use pprCLabel.
+
+\begin{code}
+pprCLabelAddr :: CLabel -> SDoc
+pprCLabelAddr clabel =
+ case labelType clabel of
+ InfoTblType -> addr_of_label
+ ClosureType -> addr_of_label
+ VecTblType -> addr_of_label
+ _ -> pp_label
+ where
+ addr_of_label = ptext SLIT("(P_)&") <> pp_label
+ pp_label = pprCLabel clabel
+\end{code}
+
+-----------------------------------------------------------------------------
+Initialising static objects with floating-point numbers. We can't
+just emit the floating point number, because C will cast it to an int
+by rounding it. We want the actual bit-representation of the float.
+
+This is a hack to turn the floating point numbers into ints that we
+can safely initialise to static locations.
+
+\begin{code}
+big_doubles = (getPrimRepSize DoubleRep) /= 1
+
+-- floatss are always 1 word
+floatToWord :: CAddrMode -> CAddrMode
+floatToWord (CLit (MachFloat r))
+ = runST (do
+ arr <- newFloatArray ((0::Int),0)
+ writeFloatArray arr 0 (fromRational r)
+ i <- readIntArray arr 0
+ return (CLit (MachInt (toInteger i) True))
+ )
+
+doubleToWords :: CAddrMode -> [CAddrMode]
+doubleToWords (CLit (MachDouble r))
+ | big_doubles -- doubles are 2 words
+ = runST (do
+ arr <- newDoubleArray ((0::Int),1)
+ writeDoubleArray arr 0 (fromRational r)
+ i1 <- readIntArray arr 0
+ i2 <- readIntArray arr 1
+ return [ CLit (MachInt (toInteger i1) True)
+ , CLit (MachInt (toInteger i2) True)
+ ]
+ )
+ | otherwise -- doubles are 1 word
+ = runST (do
+ arr <- newDoubleArray ((0::Int),0)
+ writeDoubleArray arr 0 (fromRational r)
+ i <- readIntArray arr 0
+ return [ CLit (MachInt (toInteger i) True) ]
+ )
\end{code}
projects / ghc-hetmet.git / blobdiff