1 files changed, 152 insertions, 0 deletions
diff --git a/Sjit/Compile.icl b/Sjit/Compile.icl
new file mode 100644
index 0000000..31b6523
--- /dev/null
+++ b/Sjit/Compile.icl
@@ -0,0 +1,152 @@
+implementation module Sjit.Compile
+
+import StdEnv
+import StdGeneric
+import StdMaybe
+import StdOverloadedList
+
+from Data.Func import mapSt, $
+from Data.Map import :: Map(..), get, put, newMap, fromList
+
+import Sjit.Syntax
+
+import code from "sjit_c."
+
+appendProgram :: !Bool !Program !JITState -> JITState
+appendProgram is_main prog jitst
+# new_code_ptr = append
+	jitst.code_start jitst.code_len jitst.code_ptr
+	jitst.mapping
+	jitst.n_instr
+	(encode prog)
+	is_main
+=
+	{ jitst
+	& code_ptr = new_code_ptr
+	, n_instr  = jitst.n_instr + size prog
+	}
+where
+	append :: !Int !Int !Int !Int !Int !{#Int} !Bool -> Int
+	append _ _ _ _ _ _ _ = code {
+		ccall jit_append "pIppIAI:p"
+	}
+
+bootstrap :: (!Program, !CompileState)
+bootstrap
+# (len_bs, bs_funs) = bootstrap_funs
+# is = {i \\ i <- flatten [is \\ (_,is) <- header]}
+=
+	( is,
+	{ vars   = newMap
+	, funs   = fromList bs_funs
+	, sp     = 0
+	, pc     = len_bs
+	, blocks = [!is!]
+	, jitst  = appendProgram False is (initJITState 1000)
+	})
+where
+	bootstrap_funs :: (!Int, ![(String, Int)])
+	bootstrap_funs = iter 0 header
+	where
+		iter :: !Int ![(String, [Instr])] -> (!Int, ![(String, Int)])
+		iter pc [] = (pc, [])
+		iter pc [(name,is):rest]
+		# fun = (name,pc)
+		# (pc,funs) = iter (pc+length is) rest
+		= (pc,[fun:funs])
+
+	header :: [(!String, ![Instr])]
+	header =
+		[ ("_", [PushI 0,Call 0 /* main address */,Halt])
+		, ("+", [IAddRet])
+		, ("*", [IMulRet])
+		, ("-", [ISubRet])
+		, ("/", [IDivRet])
+		]
+
+	initJITState :: !Int -> JITState
+	initJITState maxlen
+	# (code_start,mapping) = init maxlen (maxlen*10)
+	=
+		{ n_instr    = 0
+		, code_start = code_start
+		, code_len   = maxlen*10
+		, code_ptr   = code_start
+		, mapping    = mapping
+		}
+	where
+		init :: !Int !Int -> (!Int, !Int)
+		init _ _ = code {
+			ccall init_jit "II:Vpp"
+		}
+
+compile :: !Function !CompileState -> CompileState
+compile f cs
+# cs & funs = put f.fun_name cs.pc cs.funs
+# vars = cs.vars
+# cs & vars = foldr (uncurry put) cs.vars [(v,sp) \\ v <- f.fun_args & sp <- [cs.sp+1..]]
+# (is,cs) = expr f.fun_expr cs
+# is = {i \\ i <- reverse [Ret:Put (max 1 (length f.fun_args)+1):is]}
+=
+	{ cs
+	& vars   = vars
+	, pc     = cs.pc+2
+	, blocks = cs.blocks ++| [!is!]
+	, jitst  = appendProgram (f.fun_name == "main") is cs.jitst
+	}
+where
+	expr :: !Expr !CompileState -> (![Instr], !CompileState)
+	expr (Int i) cs = ([PushI i], {cs & sp=cs.sp+1, pc=cs.pc+1})
+	expr (Var v) cs = case get v cs.vars of
+		Just i  -> ([PushRef (i-cs.sp)], {cs & sp=cs.sp+1, pc=cs.pc+1})
+		Nothing -> abort "undefined variable\n"
+	expr (App f args) cs
+	# args = if (args=:[]) [Int 0] args
+	# (iss,cs) = mapSt expr args {cs & sp=cs.sp+1}
+	= case get f cs.funs of
+		Just f  -> ([Pop (length args-1):Call f:flatten iss], {cs & sp=cs.sp+2-length args, pc=cs.pc+2})
+		Nothing -> abort "undefined function\n"
+
+compile_all :: !(Maybe CompileState) ![Function] -> CompileState
+compile_all mcs funs
+# cs = case mcs of
+	Just cs -> cs
+	Nothing -> snd bootstrap
+= foldl (flip compile) cs funs
+
+generic gEncodedSize a :: !a -> Int
+gEncodedSize{|Int|} _ = 1
+gEncodedSize{|{!}|} fx xs = 1 + sum [fx x \\ x <-: xs]
+gEncodedSize{|UNIT|} _ = 0
+gEncodedSize{|PAIR|} fx fy (PAIR x y) = fx x + fy y
+gEncodedSize{|EITHER|} fl _ (LEFT l)  = fl l
+gEncodedSize{|EITHER|} _ fr (RIGHT r) = fr r
+gEncodedSize{|CONS|} fx (CONS x) = fx x + 1
+gEncodedSize{|OBJECT|} fx (OBJECT x) = fx x
+
+generic gEncode a :: !a !Int !*{#Int} -> (!Int, !*{#Int})
+gEncode{|Int|} n i arr = (i+1, {arr & [i]=n})
+gEncode{|{!}|} fx xs i arr = walk 0 (i+1) {arr & [i]=sz}
+where
+	sz = size xs
+
+	walk ai i arr
+	| ai >= sz = (i,arr)
+	# (i,arr) = fx xs.[ai] i arr
+	= walk (ai+1) i arr
+gEncode{|UNIT|} _ i arr = (i,arr)
+gEncode{|PAIR|} fx fy (PAIR x y) i arr
+	# (i,arr) = fx x i arr
+	= fy y i arr
+gEncode{|EITHER|} fl _ (LEFT l)  i arr = fl l i arr
+gEncode{|EITHER|} _ fr (RIGHT r) i arr = fr r i arr
+gEncode{|CONS of {gcd_index}|} fx (CONS x) i arr = fx x (i+1) {arr & [i]=gcd_index}
+gEncode{|OBJECT|} fx (OBJECT x) i arr = fx x i arr
+
+derive gEncodedSize Instr
+derive gEncode Instr
+
+encode :: !a -> *{#Int} | gEncodedSize{|*|}, gEncode{|*|} a
+encode x
+# (_,arr) = gEncode{|*|} x 0 (createArray (gEncodedSize{|*|} x) -1)
+= arr