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-rw-r--r--Program.icl30
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+implementation module ABC.Program
+
+import StdEnv
+
+import ABC.Machine
+import ABC.Misc
+
+pc_init :: InstrId
+pc_init = 0
+
+pc_next :: InstrId -> InstrId
+pc_next i = i + 1
+
+pc_halt :: InstrId -> InstrId
+pc_halt _ = -1
+
+pc_end :: InstrId -> Bool
+pc_end i = i < 0
+
+:: Location = I Instruction
+:: ProgramStore :== [Location]
+
+ps_get :: InstrId ProgramStore -> Instruction
+ps_get 0 [I p:_] = p
+ps_get _ [] = abortn "ps_get: index too large"
+ps_get i [_:ps] = ps_get (i-1) ps
+
+ps_init :: [Instruction] -> ProgramStore
+ps_init [] = []
+ps_init [i:is] = [I i:ps_init is]