| 1 | |
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| 2 | (** This file defines some common structures of several languages. *) |
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| 3 | |
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| 4 | (** Types and Signatures *) |
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| 5 | |
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| 6 | type signedness = Signed | Unsigned |
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| 7 | |
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| 8 | type size = int (* in bytes *) |
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| 9 | |
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| 10 | type sig_type = |
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| 11 | | Sig_int of size * signedness |
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| 12 | | Sig_float of size * signedness |
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| 13 | | Sig_offset |
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| 14 | | Sig_ptr |
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| 15 | |
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| 16 | type type_return = Type_ret of sig_type | Type_void |
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| 17 | |
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| 18 | type signature = { args: sig_type list ; res: type_return } |
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| 19 | |
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| 20 | |
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| 21 | type ident = string (* identifiers for variable and function names *) |
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| 22 | |
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| 23 | type immediate = int (* immediate values for assembler constants and offsets *) |
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| 24 | |
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| 25 | |
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| 26 | (** Memory quantities is the size of what can fit in memory. *) |
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| 27 | |
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| 28 | type quantity = |
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| 29 | | QInt of size (* concrete size in bytes *) |
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| 30 | | QOffset (* size of an offset *) |
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| 31 | | QPtr (* size of a pointer *) |
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| 32 | |
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| 33 | type abstract_size = |
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| 34 | | SQ of quantity |
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| 35 | | SProd of abstract_size list |
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| 36 | | SSum of abstract_size list |
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| 37 | | SArray of int * abstract_size |
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| 38 | |
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| 39 | type abstract_offset = abstract_size * int (* nth in size *) |
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| 40 | |
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| 41 | |
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| 42 | (** Comparison between integers or floats *) |
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| 43 | |
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| 44 | type cmp = Cmp_eq | Cmp_ne | Cmp_gt | Cmp_ge | Cmp_lt | Cmp_le |
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| 45 | |
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| 46 | (** Constants in high level languages *) |
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| 47 | |
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| 48 | type cst = |
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| 49 | | Cst_int of int (* integer constant *) |
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| 50 | | Cst_float of float (* float constant *) |
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| 51 | | Cst_addrsymbol of ident (* address of a global symbol *) |
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| 52 | | Cst_stack (* address of the stack *) |
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| 53 | | Cst_offset of abstract_offset (* offset *) |
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| 54 | | Cst_sizeof of abstract_size (* size of a type *) |
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| 55 | |
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| 56 | (** Unary operations *) |
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| 57 | |
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| 58 | type op1 = |
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| 59 | | Op_cast of (size * signedness) * size |
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| 60 | | Op_negint (**r integer opposite *) |
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| 61 | | Op_notbool (**r boolean negation *) |
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| 62 | | Op_notint (**r bitwise complement *) |
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| 63 | | Op_id (**r identity *) |
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| 64 | | Op_ptrofint (**r int to pointer *) |
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| 65 | | Op_intofptr (**r pointer to int *) |
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| 66 | |
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| 67 | (** Binary operations *) |
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| 68 | |
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| 69 | type op2 = |
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| 70 | | Op_add (**r integer addition *) |
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| 71 | | Op_sub (**r integer subtraction *) |
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| 72 | | Op_mul (**r integer multiplication *) |
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| 73 | | Op_div (**r integer division *) |
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| 74 | | Op_divu (**r integer unsigned division *) |
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| 75 | | Op_mod (**r integer modulus *) |
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| 76 | | Op_modu (**r integer unsigned modulus *) |
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| 77 | | Op_and (**r bitwise ``and'' *) |
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| 78 | | Op_or (**r bitwise ``or'' *) |
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| 79 | | Op_xor (**r bitwise ``xor'' *) |
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| 80 | | Op_shl (**r left shift *) |
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| 81 | | Op_shr (**r right shift *) |
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| 82 | | Op_shru (**r unsigned right shift *) |
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| 83 | | Op_cmp of cmp (**r integer comparison *) |
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| 84 | | Op_cmpu of cmp (**r unsigned integer comparison *) |
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| 85 | | Op_addp (**r addition for a pointer and an integer *) |
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| 86 | | Op_subp (**r substraction for a pointer and a integer *) |
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| 87 | | Op_subpp (**r substraction for two pointers *) |
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| 88 | | Op_cmpp of cmp (**r pointer comparaison *) |
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| 89 | |
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| 90 | (* Datas are used to initialize the value of variables *) |
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| 91 | |
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| 92 | type data = |
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| 93 | (* (* Disabled: needed abstraction. *) |
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| 94 | | Data_reserve of int (* only reserve some space *) |
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| 95 | *) |
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| 96 | | Data_int8 of int |
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| 97 | | Data_int16 of int |
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| 98 | | Data_int32 of int |
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| 99 | | Data_float32 of float |
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| 100 | | Data_float64 of float |
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| 101 | |
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| 102 | type data_size = Byte | HalfWord | Word |
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| 103 | |
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| 104 | (* External functions. *) |
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| 105 | |
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| 106 | type external_function = { ef_tag: ident ; ef_sig: signature } |
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| 107 | |
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| 108 | (* Traces returned by interpreters: result and cost labels are observed. The |
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| 109 | result is interpreted as an 8 bits integer for coherence between |
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| 110 | languages. *) |
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| 111 | |
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| 112 | type trace = IntValue.int32 * CostLabel.t list |
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