1 | include "Status.ma". |
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2 | include "Fetch.ma". |
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3 | |
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4 | ndefinition sign_extension: Byte → Word ≝ |
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5 | λb. |
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6 | zero eight @@ b. |
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7 | |
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8 | naxiom daemon: False. |
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9 | |
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10 | ndefinition execute_1: Status → Status ≝ |
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11 | λs. |
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12 | let 〈 instr_pc, ticks 〉 ≝ fetch (code_memory s) (program_counter s) in |
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13 | let 〈 instr, pc 〉 ≝ 〈 first … instr_pc, second … instr_pc 〉 in |
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14 | let s ≝ set_clock s (clock s + ticks) in |
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15 | let s ≝ set_program_counter s pc in |
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16 | let s ≝ |
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17 | match instr with |
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18 | [ ADD addr1 addr2 ⇒ |
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19 | let 〈result, flags〉 ≝ add_8_with_carry (get_arg_8 s false addr1) |
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20 | (get_arg_8 s false addr2) false in |
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21 | let cy_flag ≝ get_index_v … flags Z ? in |
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22 | let ac_flag ≝ get_index_v … flags one ? in |
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23 | let ov_flag ≝ get_index_v … flags two ? in |
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24 | let s ≝ set_arg_8 s ACC_A result in |
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25 | set_flags s cy_flag (Just Bit ac_flag) ov_flag |
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26 | | ADDC addr1 addr2 ⇒ |
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27 | let old_cy_flag ≝ get_cy_flag s in |
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28 | let 〈result, flags〉 ≝ add_8_with_carry (get_arg_8 s false addr1) |
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29 | (get_arg_8 s false addr2) old_cy_flag in |
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30 | let cy_flag ≝ get_index_v … flags Z ? in |
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31 | let ac_flag ≝ get_index_v … flags one ? in |
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32 | let ov_flag ≝ get_index_v … flags two ? in |
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33 | let s ≝ set_arg_8 s ACC_A result in |
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34 | set_flags s cy_flag (Just Bit ac_flag) ov_flag |
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35 | | SUBB addr1 addr2 ⇒ |
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36 | let old_cy_flag ≝ get_cy_flag s in |
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37 | let 〈result, flags〉 ≝ sub_8_with_carry (get_arg_8 s false addr1) |
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38 | (get_arg_8 s false addr2) old_cy_flag in |
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39 | let cy_flag ≝ get_index_v … flags Z ? in |
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40 | let ac_flag ≝ get_index_v … flags one ? in |
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41 | let ov_flag ≝ get_index_v … flags two ? in |
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42 | let s ≝ set_arg_8 s ACC_A result in |
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43 | set_flags s cy_flag (Just Bit ac_flag) ov_flag |
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44 | | ANL addr ⇒ |
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45 | match addr with |
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46 | [ Left l ⇒ |
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47 | match l with |
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48 | [ Left l' ⇒ |
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49 | let 〈addr1, addr2〉 ≝ l' in |
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50 | let and_val ≝ conjunction_bv ? (get_arg_8 s true addr1) (get_arg_8 s true addr2) in |
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51 | set_arg_8 s addr1 and_val |
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52 | | Right r ⇒ |
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53 | let 〈addr1, addr2〉 ≝ r in |
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54 | let and_val ≝ conjunction_bv ? (get_arg_8 s true addr1) (get_arg_8 s true addr2) in |
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55 | set_arg_8 s addr1 and_val |
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56 | ] |
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57 | | Right r ⇒ |
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58 | let 〈addr1, addr2〉 ≝ r in |
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59 | let and_val ≝ conjunction (get_cy_flag s) (get_arg_1 s addr2 true) in |
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60 | set_flags s and_val (Nothing ?) (get_ov_flag s) |
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61 | ] |
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62 | | ORL addr ⇒ |
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63 | match addr with |
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64 | [ Left l ⇒ |
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65 | match l with |
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66 | [ Left l' ⇒ |
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67 | let 〈addr1, addr2〉 ≝ l' in |
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68 | let or_val ≝ inclusive_disjunction_bv ? (get_arg_8 s true addr1) (get_arg_8 s true addr2) in |
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69 | set_arg_8 s addr1 or_val |
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70 | | Right r ⇒ |
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71 | let 〈addr1, addr2〉 ≝ r in |
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72 | let or_val ≝ inclusive_disjunction_bv ? (get_arg_8 s true addr1) (get_arg_8 s true addr2) in |
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73 | set_arg_8 s addr1 or_val |
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74 | ] |
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75 | | Right r ⇒ |
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76 | let 〈addr1, addr2〉 ≝ r in |
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77 | let or_val ≝ inclusive_disjunction (get_cy_flag s) (get_arg_1 s addr2 true) in |
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78 | set_flags s or_val (Nothing ?) (get_ov_flag s) |
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79 | ] |
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80 | | XRL addr ⇒ |
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81 | match addr with |
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82 | [ Left l' ⇒ |
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83 | let 〈addr1, addr2〉 ≝ l' in |
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84 | let xor_val ≝ exclusive_disjunction_bv ? (get_arg_8 s true addr1) (get_arg_8 s true addr2) in |
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85 | set_arg_8 s addr1 xor_val |
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86 | | Right r ⇒ |
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87 | let 〈addr1, addr2〉 ≝ r in |
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88 | let xor_val ≝ exclusive_disjunction_bv ? (get_arg_8 s true addr1) (get_arg_8 s true addr2) in |
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89 | set_arg_8 s addr1 xor_val |
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90 | ] |
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91 | | INC addr ⇒ |
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92 | match addr return λx. bool_to_Prop (is_in … [[ acc_a; |
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93 | register; |
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94 | direct; |
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95 | indirect; |
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96 | dptr ]] x) → ? with |
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97 | [ ACC_A ⇒ λacc_a: True. |
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98 | let 〈 carry, result 〉 ≝ half_add ? (get_arg_8 s true ACC_A) (bitvector_of_nat eight one) in |
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99 | set_arg_8 s ACC_A result |
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100 | | REGISTER r ⇒ λregister: True. |
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101 | let 〈 carry, result 〉 ≝ half_add ? (get_arg_8 s true (REGISTER r)) (bitvector_of_nat eight one) in |
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102 | set_arg_8 s (REGISTER r) result |
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103 | | DIRECT d ⇒ λdirect: True. |
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104 | let 〈 carry, result 〉 ≝ half_add ? (get_arg_8 s true (DIRECT d)) (bitvector_of_nat eight one) in |
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105 | set_arg_8 s (DIRECT d) result |
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106 | | INDIRECT i ⇒ λindirect: True. |
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107 | let 〈 carry, result 〉 ≝ half_add ? (get_arg_8 s true (INDIRECT i)) (bitvector_of_nat eight one) in |
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108 | set_arg_8 s (INDIRECT i) result |
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109 | | DPTR ⇒ λdptr: True. |
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110 | let 〈 carry, bl 〉 ≝ half_add ? (get_8051_sfr s SFR_DPL) (bitvector_of_nat eight one) in |
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111 | let 〈 carry, bu 〉 ≝ full_add ? (get_8051_sfr s SFR_DPH) (zero eight) carry in |
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112 | let s ≝ set_8051_sfr s SFR_DPL bl in |
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113 | set_8051_sfr s SFR_DPH bu |
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114 | | _ ⇒ λother: False. ⊥ |
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115 | ] (subaddressing_modein … addr) |
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116 | | DEC addr ⇒ |
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117 | let 〈 result, flags 〉 ≝ sub_8_with_carry (get_arg_8 s true addr) (bitvector_of_nat eight one) false in |
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118 | set_arg_8 s addr result |
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119 | | MUL addr1 addr2 ⇒ |
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120 | let acc_a_nat ≝ nat_of_bitvector eight (get_8051_sfr s SFR_ACC_A) in |
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121 | let acc_b_nat ≝ nat_of_bitvector eight (get_8051_sfr s SFR_ACC_B) in |
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122 | let product ≝ acc_a_nat * acc_b_nat in |
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123 | let ov_flag ≝ product ≥ two_hundred_and_fifty_six in |
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124 | let low ≝ bitvector_of_nat eight (product mod two_hundred_and_fifty_six) in |
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125 | let high ≝ bitvector_of_nat eight (product ÷ two_hundred_and_fifty_six) in |
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126 | let s ≝ set_8051_sfr s SFR_ACC_A low in |
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127 | set_8051_sfr s SFR_ACC_B high |
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128 | | DIV addr1 addr2 ⇒ |
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129 | let acc_a_nat ≝ nat_of_bitvector eight (get_8051_sfr s SFR_ACC_A) in |
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130 | let acc_b_nat ≝ nat_of_bitvector eight (get_8051_sfr s SFR_ACC_B) in |
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131 | match acc_b_nat with |
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132 | [ Z ⇒ set_flags s false (Nothing Bit) true |
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133 | | S o ⇒ |
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134 | let q ≝ bitvector_of_nat eight (acc_a_nat ÷ (S o)) in |
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135 | let r ≝ bitvector_of_nat eight (acc_a_nat mod two_hundred_and_fifty_six) in |
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136 | let s ≝ set_8051_sfr s SFR_ACC_A q in |
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137 | let s ≝ set_8051_sfr s SFR_ACC_B r in |
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138 | set_flags s false (Nothing Bit) false |
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139 | ] |
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140 | | DA addr ⇒ |
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141 | let 〈 acc_nu, acc_nl 〉 ≝ split ? four four (get_8051_sfr s SFR_ACC_A) in |
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142 | if inclusive_disjunction (greater_than_b (nat_of_bitvector ? acc_nl) nine) (get_ac_flag s) then |
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143 | let 〈result, flags〉 ≝ add_8_with_carry (get_8051_sfr s SFR_ACC_A) (bitvector_of_nat eight six) false in |
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144 | let cy_flag ≝ get_index_v … flags Z ? in |
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145 | let 〈acc_nu', acc_nl'〉 ≝ split ? four four result in |
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146 | if (greater_than_b (nat_of_bitvector ? acc_nu') nine) ∨ cy_flag then |
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147 | let 〈 carry, nu 〉 ≝ half_add ? acc_nu' (bitvector_of_nat four six) in |
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148 | let new_acc ≝ nu @@ acc_nl' in |
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149 | let s ≝ set_8051_sfr s SFR_ACC_A new_acc in |
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150 | set_flags s cy_flag (Just ? (get_ac_flag s)) (get_ov_flag s) |
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151 | else |
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152 | s |
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153 | else |
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154 | s |
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155 | | CLR addr ⇒ |
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156 | match addr return λx. bool_to_Prop (is_in … [[ acc_a; carry; bit_addr ]] x) → ? with |
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157 | [ ACC_A ⇒ λacc_a: True. set_arg_8 s ACC_A (zero eight) |
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158 | | CARRY ⇒ λcarry: True. set_arg_1 s CARRY false |
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159 | | BIT_ADDR b ⇒ λbit_addr: True. set_arg_1 s (BIT_ADDR b) false |
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160 | | _ ⇒ λother: False. ⊥ |
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161 | ] (subaddressing_modein … addr) |
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162 | | CPL addr ⇒ |
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163 | match addr return λx. bool_to_Prop (is_in … [[ acc_a; carry; bit_addr ]] x) → ? with |
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164 | [ ACC_A ⇒ λacc_a: True. |
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165 | let old_acc ≝ get_8051_sfr s SFR_ACC_A in |
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166 | let new_acc ≝ negation_bv ? old_acc in |
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167 | set_8051_sfr s SFR_ACC_A new_acc |
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168 | | CARRY ⇒ λcarry: True. |
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169 | let old_cy_flag ≝ get_arg_1 s CARRY true in |
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170 | let new_cy_flag ≝ negation old_cy_flag in |
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171 | set_arg_1 s CARRY new_cy_flag |
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172 | | BIT_ADDR b ⇒ λbit_addr: True. |
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173 | let old_bit ≝ get_arg_1 s (BIT_ADDR b) true in |
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174 | let new_bit ≝ negation old_bit in |
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175 | set_arg_1 s (BIT_ADDR b) new_bit |
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176 | | _ ⇒ λother: False. ? |
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177 | ] (subaddressing_modein … addr) |
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178 | | SETB b ⇒ set_arg_1 s b false |
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179 | | RL _ ⇒ (* DPM: always ACC_A *) |
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180 | let old_acc ≝ get_8051_sfr s SFR_ACC_A in |
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181 | let new_acc ≝ rotate_left … one old_acc in |
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182 | set_8051_sfr s SFR_ACC_A new_acc |
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183 | | RR _ ⇒ (* DPM: always ACC_A *) |
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184 | let old_acc ≝ get_8051_sfr s SFR_ACC_A in |
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185 | let new_acc ≝ rotate_right … one old_acc in |
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186 | set_8051_sfr s SFR_ACC_A new_acc |
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187 | | RLC _ ⇒ (* DPM: always ACC_A *) |
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188 | let old_cy_flag ≝ get_cy_flag s in |
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189 | let old_acc ≝ get_8051_sfr s SFR_ACC_A in |
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190 | let new_cy_flag ≝ get_index_v … old_acc Z ? in |
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191 | let new_acc ≝ shift_left … eight one old_acc old_cy_flag in |
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192 | let s ≝ set_arg_1 s CARRY new_cy_flag in |
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193 | set_8051_sfr s SFR_ACC_A new_acc |
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194 | | RRC _ ⇒ (* DPM: always ACC_A *) |
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195 | let old_cy_flag ≝ get_cy_flag s in |
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196 | let old_acc ≝ get_8051_sfr s SFR_ACC_A in |
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197 | let new_cy_flag ≝ get_index_v … old_acc seven ? in |
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198 | let new_acc ≝ shift_right … eight one old_acc old_cy_flag in |
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199 | let s ≝ set_arg_1 s CARRY new_cy_flag in |
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200 | set_8051_sfr s SFR_ACC_A new_acc |
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201 | | SWAP _ ⇒ (* DPM: always ACC_A *) |
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202 | let old_acc ≝ get_8051_sfr s SFR_ACC_A in |
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203 | let 〈nu,nl〉 ≝ split ? four four old_acc in |
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204 | let new_acc ≝ nl @@ nu in |
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205 | set_8051_sfr s SFR_ACC_A new_acc |
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206 | | PUSH addr ⇒ |
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207 | match addr return λx. bool_to_Prop (is_in … [[ direct ]] x) → ? with |
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208 | [ DIRECT d ⇒ λdirect: True. |
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209 | let 〈carry, new_sp〉 ≝ half_add ? (get_8051_sfr s SFR_SP) (bitvector_of_nat eight one) in |
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210 | let s ≝ set_8051_sfr s SFR_SP new_sp in |
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211 | write_at_stack_pointer s d |
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212 | | _ ⇒ λother: False. ⊥ |
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213 | ] (subaddressing_modein … addr) |
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214 | | POP addr ⇒ |
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215 | let contents ≝ read_at_stack_pointer s in |
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216 | let 〈new_sp, flags〉 ≝ sub_8_with_carry (get_8051_sfr s SFR_SP) (bitvector_of_nat eight one) false in |
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217 | let s ≝ set_8051_sfr s SFR_SP new_sp in |
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218 | set_arg_8 s addr contents |
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219 | | XCH addr1 addr2 ⇒ |
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220 | let old_addr ≝ get_arg_8 s false addr2 in |
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221 | let old_acc ≝ get_8051_sfr s SFR_ACC_A in |
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222 | let s ≝ set_8051_sfr s SFR_ACC_A old_addr in |
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223 | set_arg_8 s addr2 old_acc |
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224 | | XCHD addr1 addr2 ⇒ |
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225 | let 〈acc_nu, acc_nl〉 ≝ split … four four (get_8051_sfr s SFR_ACC_A) in |
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226 | let 〈arg_nu, arg_nl〉 ≝ split … four four (get_arg_8 s false addr2) in |
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227 | let new_acc ≝ acc_nu @@ arg_nl in |
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228 | let new_arg ≝ arg_nu @@ acc_nl in |
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229 | let s ≝ set_8051_sfr s SFR_ACC_A new_acc in |
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230 | set_arg_8 s addr2 new_arg |
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231 | | RET ⇒ |
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232 | let high_bits ≝ read_at_stack_pointer s in |
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233 | let 〈new_sp, flags〉 ≝ sub_8_with_carry (get_8051_sfr s SFR_SP) (bitvector_of_nat eight one) false in |
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234 | let s ≝ set_8051_sfr s SFR_SP new_sp in |
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235 | let low_bits ≝ read_at_stack_pointer s in |
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236 | let 〈new_sp, flags〉 ≝ sub_8_with_carry (get_8051_sfr s SFR_SP) (bitvector_of_nat eight one) false in |
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237 | let s ≝ set_8051_sfr s SFR_SP new_sp in |
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238 | let new_pc ≝ high_bits @@ low_bits in |
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239 | set_program_counter s new_pc |
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240 | | RETI ⇒ |
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241 | let high_bits ≝ read_at_stack_pointer s in |
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242 | let 〈new_sp, flags〉 ≝ sub_8_with_carry (get_8051_sfr s SFR_SP) (bitvector_of_nat eight one) false in |
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243 | let s ≝ set_8051_sfr s SFR_SP new_sp in |
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244 | let low_bits ≝ read_at_stack_pointer s in |
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245 | let 〈new_sp, flags〉 ≝ sub_8_with_carry (get_8051_sfr s SFR_SP) (bitvector_of_nat eight one) false in |
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246 | let s ≝ set_8051_sfr s SFR_SP new_sp in |
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247 | let new_pc ≝ high_bits @@ low_bits in |
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248 | set_program_counter s new_pc |
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249 | | Jump j ⇒ |
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250 | match j with |
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251 | [ JC addr ⇒ |
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252 | match addr return λx. bool_to_Prop (is_in … [[ relative ]] x) → ? with |
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253 | [ RELATIVE r ⇒ λrel: True. |
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254 | if get_cy_flag s then |
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255 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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256 | set_program_counter s new_pc |
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257 | else |
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258 | s |
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259 | | _ ⇒ λother: False. ⊥ |
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260 | ] (subaddressing_modein … addr) |
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261 | | JNC addr ⇒ |
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262 | match addr return λx. bool_to_Prop (is_in … [[ relative ]] x) → ? with |
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263 | [ RELATIVE r ⇒ λrel: True. |
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264 | if negation (get_cy_flag s) then |
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265 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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266 | set_program_counter s new_pc |
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267 | else |
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268 | s |
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269 | | _ ⇒ λother: False. ⊥ |
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270 | ] (subaddressing_modein … addr) |
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271 | | JB addr1 addr2 ⇒ |
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272 | match addr2 return λx. bool_to_Prop (is_in … [[ relative ]] x) → ? with |
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273 | [ RELATIVE r ⇒ λrel: True. |
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274 | if get_arg_1 s addr1 false then |
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275 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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276 | set_program_counter s new_pc |
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277 | else |
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278 | s |
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279 | | _ ⇒ λother: False. ⊥ |
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280 | ] (subaddressing_modein … addr2) |
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281 | | JNB addr1 addr2 ⇒ |
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282 | match addr2 return λx. bool_to_Prop (is_in … [[ relative ]] x) → ? with |
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283 | [ RELATIVE r ⇒ λrel: True. |
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284 | if negation (get_arg_1 s addr1 false) then |
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285 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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286 | set_program_counter s new_pc |
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287 | else |
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288 | s |
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289 | | _ ⇒ λother: False. ⊥ |
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290 | ] (subaddressing_modein … addr2) |
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291 | | JBC addr1 addr2 ⇒ |
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292 | match addr2 return λx. bool_to_Prop (is_in … [[ relative ]] x) → ? with |
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293 | [ RELATIVE r ⇒ λrel: True. |
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294 | let s ≝ set_arg_1 s addr1 false in |
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295 | if get_arg_1 s addr1 false then |
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296 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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297 | set_program_counter s new_pc |
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298 | else |
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299 | s |
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300 | | _ ⇒ λother: False. ⊥ |
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301 | ] (subaddressing_modein … addr2) |
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302 | | JZ addr ⇒ |
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303 | match addr return λx. bool_to_Prop (is_in … [[ relative ]] x) → ? with |
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304 | [ RELATIVE r ⇒ λrel: True. |
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305 | if eq_bv ? (get_8051_sfr s SFR_ACC_A) (zero eight) then |
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306 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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307 | set_program_counter s new_pc |
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308 | else |
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309 | s |
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310 | | _ ⇒ λother: False. ⊥ |
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311 | ] (subaddressing_modein … addr) |
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312 | | JNZ addr ⇒ |
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313 | match addr return λx. bool_to_Prop (is_in … [[ relative ]] x) → ? with |
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314 | [ RELATIVE r ⇒ λrel: True. |
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315 | if negation (eq_bv ? (get_8051_sfr s SFR_ACC_A) (zero eight)) then |
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316 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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317 | set_program_counter s new_pc |
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318 | else |
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319 | s |
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320 | | _ ⇒ λother: False. ⊥ |
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321 | ] (subaddressing_modein … addr) |
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322 | | CJNE addr1 addr2 ⇒ |
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323 | match addr2 return λx. bool_to_Prop (is_in … [[ relative ]] x) → ? with |
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324 | [ RELATIVE r ⇒ λrelative: True. |
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325 | match addr1 with |
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326 | [ Left l ⇒ |
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327 | let 〈addr1, addr2〉 ≝ l in |
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328 | let new_cy ≝ less_than_b (nat_of_bitvector ? (get_arg_8 s false addr1)) |
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329 | (nat_of_bitvector ? (get_arg_8 s false addr2)) in |
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330 | if negation (eq_bv ? (get_arg_8 s false addr1) (get_arg_8 s false addr2)) then |
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331 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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332 | let s ≝ set_program_counter s new_pc in |
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333 | set_flags s new_cy (Nothing ?) (get_ov_flag s) |
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334 | else |
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335 | (set_flags s new_cy (Nothing ?) (get_ov_flag s)) |
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336 | | Right r' ⇒ |
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337 | let 〈addr1, addr2〉 ≝ r' in |
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338 | let new_cy ≝ less_than_b (nat_of_bitvector ? (get_arg_8 s false addr1)) |
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339 | (nat_of_bitvector ? (get_arg_8 s false addr2)) in |
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340 | if negation (eq_bv ? (get_arg_8 s false addr1) (get_arg_8 s false addr2)) then |
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341 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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342 | let s ≝ set_program_counter s new_pc in |
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343 | set_flags s new_cy (Nothing ?) (get_ov_flag s) |
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344 | else |
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345 | (set_flags s new_cy (Nothing ?) (get_ov_flag s)) |
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346 | ] |
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347 | | _ ⇒ λother: False. ⊥ |
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348 | ] (subaddressing_modein … addr2) |
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349 | | DJNZ addr1 addr2 ⇒ |
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350 | match addr2 return λx. bool_to_Prop (is_in … [[ relative ]] x) → ? with |
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351 | [ RELATIVE r ⇒ λrel: True. |
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352 | let 〈result, flags〉 ≝ sub_8_with_carry (get_arg_8 s true addr1) (bitvector_of_nat eight one) false in |
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353 | let s ≝ set_arg_8 s addr1 result in |
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354 | if negation (eq_bv ? result (zero eight)) then |
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355 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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356 | set_program_counter s new_pc |
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357 | else |
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358 | s |
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359 | | _ ⇒ λother: False. ⊥ |
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360 | ] (subaddressing_modein … addr2) |
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361 | ] |
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362 | | JMP _ ⇒ (* DPM: always indirect_dptr *) |
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363 | let dptr ≝ (get_8051_sfr s SFR_DPH) @@ (get_8051_sfr s SFR_DPL) in |
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364 | let big_acc ≝ (zero eight) @@ (get_8051_sfr s SFR_ACC_A) in |
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365 | let 〈carry, jmp_addr〉 ≝ half_add ? big_acc dptr in |
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366 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) jmp_addr in |
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367 | set_program_counter s new_pc |
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368 | | LJMP addr ⇒ |
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369 | match addr return λx. bool_to_Prop (is_in … [[ addr16 ]] x) → ? with |
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370 | [ ADDR16 a ⇒ λaddr16: True. |
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371 | set_program_counter s a |
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372 | | _ ⇒ λother: False. ⊥ |
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373 | ] (subaddressing_modein … addr) |
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374 | | SJMP addr ⇒ |
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375 | match addr return λx. bool_to_Prop (is_in … [[ relative ]] x) → ? with |
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376 | [ RELATIVE r ⇒ λrelative: True. |
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377 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) (sign_extension r) in |
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378 | set_program_counter s new_pc |
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379 | | _ ⇒ λother: False. ⊥ |
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380 | ] (subaddressing_modein … addr) |
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381 | | AJMP addr ⇒ |
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382 | match addr return λx. bool_to_Prop (is_in … [[ addr11 ]] x) → ? with |
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383 | [ ADDR11 a ⇒ λaddr11: True. |
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384 | let 〈pc_bu, pc_bl〉 ≝ split ? eight eight (program_counter s) in |
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385 | let 〈nu, nl〉 ≝ split ? four four pc_bu in |
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386 | let bit ≝ get_index_v … nl Z ? in |
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387 | let 〈relevant1, relevant2〉 ≝ split ? three eight a in |
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388 | let new_addr ≝ (nu @@ (bit ::: relevant1)) @@ relevant2 in |
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389 | let 〈carry, new_pc〉 ≝ half_add ? (program_counter s) new_addr in |
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390 | set_program_counter s new_pc |
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391 | | _ ⇒ λother: False. ⊥ |
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392 | ] (subaddressing_modein … addr) |
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393 | | MOVC addr1 addr2 ⇒ |
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394 | match addr2 return λx. bool_to_Prop (is_in … [[ acc_dptr; acc_pc ]] x) → ? with |
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395 | [ ACC_DPTR ⇒ λacc_dptr: True. |
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396 | let big_acc ≝ (zero eight) @@ (get_8051_sfr s SFR_ACC_A) in |
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397 | let dptr ≝ (get_8051_sfr s SFR_DPH) @@ (get_8051_sfr s SFR_DPL) in |
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398 | let 〈carry, new_addr〉 ≝ half_add ? dptr big_acc in |
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399 | let result ≝ lookup ? ? new_addr (code_memory s) (zero ?) in |
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400 | set_8051_sfr s SFR_ACC_A result |
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401 | | ACC_PC ⇒ λacc_pc: True. |
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402 | let big_acc ≝ (zero eight) @@ (get_8051_sfr s SFR_ACC_A) in |
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403 | let 〈carry,inc_pc〉 ≝ half_add ? (program_counter s) (bitvector_of_nat sixteen one) in |
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404 | (* DPM: Under specified: does the carry from PC incrementation affect the *) |
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405 | (* addition of the PC with the DPTR? At the moment, no. *) |
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406 | let s ≝ set_program_counter s inc_pc in |
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407 | let 〈carry, new_addr〉 ≝ half_add ? inc_pc big_acc in |
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408 | let result ≝ lookup ? ? new_addr (code_memory s) (zero ?) in |
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409 | set_8051_sfr s SFR_ACC_A result |
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410 | | _ ⇒ λother: False. ⊥ |
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411 | ] (subaddressing_modein … addr2) |
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412 | | MOVX addr ⇒ |
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413 | (* DPM: only copies --- doesn't affect I/O *) |
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414 | match addr with |
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415 | [ Left l ⇒ |
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416 | let 〈addr1, addr2〉 ≝ l in |
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417 | set_arg_8 s addr1 (get_arg_8 s false addr2) |
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418 | | Right r ⇒ |
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419 | let 〈addr1, addr2〉 ≝ r in |
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420 | set_arg_8 s addr1 (get_arg_8 s false addr2) |
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421 | ] |
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422 | | MOV addr ⇒ |
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423 | match addr with |
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424 | [ Left l ⇒ |
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425 | match l with |
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426 | [ Left l' ⇒ |
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427 | match l' with |
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428 | [ Left l'' ⇒ |
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429 | match l'' with |
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430 | [ Left l''' ⇒ |
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431 | match l''' with |
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432 | [ Left l'''' ⇒ |
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433 | let 〈addr1, addr2〉 ≝ l'''' in |
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434 | set_arg_8 s addr1 (get_arg_8 s false addr2) |
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435 | | Right r'''' ⇒ |
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436 | let 〈addr1, addr2〉 ≝ r'''' in |
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437 | set_arg_8 s addr1 (get_arg_8 s false addr2) |
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438 | ] |
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439 | | Right r''' ⇒ |
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440 | let 〈addr1, addr2〉 ≝ r''' in |
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441 | set_arg_8 s addr1 (get_arg_8 s false addr2) |
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442 | ] |
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443 | | Right r'' ⇒ |
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444 | let 〈addr1, addr2〉 ≝ r'' in |
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445 | set_arg_16 s (get_arg_16 s addr2) addr1 |
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446 | ] |
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447 | | Right r ⇒ |
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448 | let 〈addr1, addr2〉 ≝ r in |
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449 | set_arg_1 s addr1 (get_arg_1 s addr2 false) |
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450 | ] |
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451 | | Right r ⇒ |
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452 | let 〈addr1, addr2〉 ≝ r in |
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453 | set_arg_1 s addr1 (get_arg_1 s addr2 false) |
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454 | ] |
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455 | | LCALL addr ⇒ |
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456 | match addr return λx. bool_to_Prop (is_in … [[ addr16 ]] x) → ? with |
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457 | [ ADDR16 a ⇒ λaddr16: True. |
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458 | let 〈carry, new_sp〉 ≝ half_add ? (get_8051_sfr s SFR_SP) (bitvector_of_nat eight one) in |
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459 | let s ≝ set_8051_sfr s SFR_SP new_sp in |
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460 | let 〈pc_bu, pc_bl〉 ≝ split ? eight eight (program_counter s) in |
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461 | let s ≝ write_at_stack_pointer s pc_bl in |
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462 | let 〈carry, new_sp〉 ≝ half_add ? (get_8051_sfr s SFR_SP) (bitvector_of_nat eight one) in |
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463 | let s ≝ set_8051_sfr s SFR_SP new_sp in |
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464 | let s ≝ write_at_stack_pointer s pc_bu in |
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465 | set_program_counter s a |
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466 | | _ ⇒ λother: False. ⊥ |
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467 | ] (subaddressing_modein … addr) |
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468 | | ACALL addr ⇒ |
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469 | match addr return λx. bool_to_Prop (is_in … [[ addr11 ]] x) → ? with |
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470 | [ ADDR11 a ⇒ λaddr11: True. |
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471 | let 〈carry, new_sp〉 ≝ half_add ? (get_8051_sfr s SFR_SP) (bitvector_of_nat eight one) in |
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472 | let s ≝ set_8051_sfr s SFR_SP new_sp in |
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473 | let 〈pc_bu, pc_bl〉 ≝ split ? eight eight (program_counter s) in |
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474 | let s ≝ write_at_stack_pointer s pc_bl in |
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475 | let 〈carry, new_sp〉 ≝ half_add ? (get_8051_sfr s SFR_SP) (bitvector_of_nat eight one) in |
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476 | let s ≝ set_8051_sfr s SFR_SP new_sp in |
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477 | let s ≝ write_at_stack_pointer s pc_bu in |
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478 | let 〈thr, eig〉 ≝ split ? three eight a in |
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479 | let 〈fiv, thr'〉 ≝ split ? five three pc_bu in |
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480 | let new_addr ≝ (fiv @@ thr) @@ pc_bl in |
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481 | set_program_counter s new_addr |
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482 | | _ ⇒ λother: False. ⊥ |
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483 | ] (subaddressing_modein … addr) |
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484 | | NOP ⇒ s |
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485 | ] |
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486 | in |
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487 | s. |
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488 | ncases daemon; |
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489 | nqed. |
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490 | |
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491 | nlet rec execute (n: Nat) (s: Status) on n: Status ≝ |
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492 | match n with |
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493 | [ Z ⇒ s |
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494 | | S o ⇒ execute o (execute_1 s) |
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495 | ]. |
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