| 1 | (**************************************************************************) |
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| 2 | (* ___ *) |
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| 3 | (* ||M|| *) |
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| 4 | (* ||A|| A project by Andrea Asperti *) |
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| 5 | (* ||T|| *) |
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| 6 | (* ||I|| Developers: *) |
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| 7 | (* ||T|| The HELM team. *) |
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| 8 | (* ||A|| http://helm.cs.unibo.it *) |
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| 9 | (* \ / *) |
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| 10 | (* \ / This file is distributed under the terms of the *) |
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| 11 | (* v GNU General Public License Version 2 *) |
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| 12 | (* *) |
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| 13 | (**************************************************************************) |
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| 14 | |
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| 15 | include "Vm.ma". |
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| 16 | include "stack.ma". |
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| 17 | include "mono_stack.ma". |
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| 18 | |
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| 19 | (*status flag for conditionals*) |
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| 20 | definition asm_store_t ≝ mono_stack_store_t × bool. |
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| 21 | |
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| 22 | inductive asm_seq_i : Type[0] ≝ |
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| 23 | | asm_seq : stack_seq → asm_seq_i |
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| 24 | | pop_cond : asm_seq_i |
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| 25 | | asm_pop_frame : asm_seq_i |
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| 26 | | asm_push_frame : asm_seq_i |
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| 27 | | asm_alloc_frame : ℕ → asm_seq_i. |
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| 28 | |
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| 29 | definition asm_eval_seq : asm_seq_i → asm_store_t → option asm_store_t ≝ |
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| 30 | λi,s.match i with |
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| 31 | [ asm_seq x ⇒ ! y ← mono_stack_eval_seq x (\fst s); |
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| 32 | return 〈y,(\snd s)〉 |
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| 33 | | pop_cond ⇒ !〈val,y〉 ← mono_pop (\fst s); |
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| 34 | return 〈y,eqb val 1〉 |
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| 35 | | asm_pop_frame ⇒ ! y ← mono_stack_return_call (\fst s); |
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| 36 | return 〈y,(\snd s)〉 |
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| 37 | | asm_push_frame ⇒ !〈exp_val,st1〉 ← mono_pop (\fst s); |
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| 38 | let new_fp ≝ (|(\fst st1)|) in |
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| 39 | let st2 ≝ mono_push st1 (\fst (\snd (\fst s))) in |
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| 40 | let st3 ≝ mono_push st2 O in |
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| 41 | let st4 ≝ mono_push st3 exp_val in |
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| 42 | return 〈 〈(\fst st4),〈new_fp,(\snd(\snd st4))〉〉,(\snd s)〉 |
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| 43 | | asm_alloc_frame n ⇒ let new_frame ≝ list_n … O (pred (to_shift + n)) in |
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| 44 | return 〈〈new_frame @ (\fst (\fst s)),(\snd (\fst s))〉,(\snd s)〉 |
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| 45 | ]. |
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| 46 | |
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| 47 | definition asm_eval_cond : asm_store_t → option bool ≝ |
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| 48 | λs.return (\snd s). |
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| 49 | |
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| 50 | definition asm_assembler_params ≝ mk_assembler_params |
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| 51 | asm_seq_i unit False. |
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| 52 | |
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| 53 | definition asm_sem_params ≝ mk_sem_params asm_assembler_params asm_store_t asm_eval_seq |
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| 54 | (λ_.asm_eval_cond) ?. |
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| 55 | * qed. |
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| 56 | |
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| 57 | definition asm_instructions ≝ AssemblerInstr asm_assembler_params flat_labels. |
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| 58 | |
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| 59 | definition asm_program ≝ AssemblerProgram asm_assembler_params flat_labels. |
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| 60 | |
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| 61 | definition asm_state ≝ vm_state asm_assembler_params asm_sem_params. |
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