Mercurial > hg > index.cgi
annotate lwasm/insn_bitbit.c @ 47:1d6a31a2586b
Fixed multiple symbol error with nested structs
author | lost@l-w.ca |
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date | Mon, 04 Apr 2011 22:15:33 -0600 |
parents | 7317fbe024af |
children | 8764142b3192 |
rev | line source |
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0
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1 /* |
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2 insn_bitbit.c |
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3 Copyright © 2009 William Astle |
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4 |
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5 This file is part of LWASM. |
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6 |
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7 LWASM is free software: you can redistribute it and/or modify it under the |
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8 terms of the GNU General Public License as published by the Free Software |
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9 Foundation, either version 3 of the License, or (at your option) any later |
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10 version. |
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11 |
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12 This program is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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15 more details. |
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16 |
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17 You should have received a copy of the GNU General Public License along with |
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18 this program. If not, see <http://www.gnu.org/licenses/>. |
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19 */ |
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20 |
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21 #include <stdlib.h> |
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22 #include <ctype.h> |
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23 |
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24 #include <lw_expr.h> |
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25 |
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26 #include "lwasm.h" |
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27 #include "instab.h" |
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28 |
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29 // these instructions cannot tolerate external references |
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30 PARSEFUNC(insn_parse_bitbit) |
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31 { |
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32 int r; |
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33 lw_expr_t e; |
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34 // int v1; |
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35 // int tv; |
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36 |
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37 r = toupper(*(*p)++); |
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38 if (r == 'A') |
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39 r = 1; |
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40 else if (r == 'B') |
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41 r = 2; |
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42 else if (r == 'C' && toupper(**p) == 'C') |
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43 { |
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44 r = 0; |
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45 (*p)++; |
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46 } |
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47 else |
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48 { |
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49 lwasm_register_error(as, l, "Bad register"); |
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50 return; |
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51 } |
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52 |
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53 if (*(*p)++ != ',') |
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54 { |
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55 lwasm_register_error(as, l, "Bad operand"); |
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56 return; |
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57 } |
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58 e = lwasm_parse_expr(as, p); |
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59 if (!e) |
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60 { |
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61 lwasm_register_error(as, l, "Bad operand"); |
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62 return; |
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63 } |
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64 lwasm_save_expr(l, 0, e); |
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65 if (*(*p)++ != ',') |
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66 { |
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67 lwasm_register_error(as, l, "Bad operand"); |
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68 return; |
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69 } |
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70 |
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71 e = lwasm_parse_expr(as, p); |
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72 if (!e) |
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73 { |
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74 lwasm_register_error(as, l, "Bad operand"); |
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75 return; |
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76 } |
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77 lwasm_save_expr(l, 1, e); |
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78 |
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79 if (*(*p)++ != ',') |
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80 { |
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81 lwasm_register_error(as, l, "Bad operand"); |
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82 return; |
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83 } |
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84 |
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85 // ignore base page address modifier |
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86 if (**p == '<') |
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87 (*p)++; |
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88 |
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89 e = lwasm_parse_expr(as, p); |
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90 if (!e) |
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91 { |
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92 lwasm_register_error(as, l, "Bad operand"); |
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93 return; |
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94 } |
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95 lwasm_save_expr(l, 2, e); |
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96 |
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97 l -> lint = r; |
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98 l -> len = OPLEN(instab[l -> insn].ops[0]) + 2; |
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99 } |
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100 |
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101 EMITFUNC(insn_emit_bitbit) |
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102 { |
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103 int v1, v2; |
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104 lw_expr_t e; |
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105 |
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106 e = lwasm_fetch_expr(l, 0); |
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107 if (!lw_expr_istype(e, lw_expr_type_int)) |
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108 { |
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109 lwasm_register_error(as, l, "Bit number must be fully resolved"); |
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110 return; |
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111 } |
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112 v1 = lw_expr_intval(e); |
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113 if (v1 < 0 || v1 > 7) |
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114 { |
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115 lwasm_register_error(as, l, "Invalid bit number"); |
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116 v1 = 0; |
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117 } |
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118 |
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119 e = lwasm_fetch_expr(l, 1); |
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120 if (!lw_expr_istype(e, lw_expr_type_int)) |
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121 { |
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122 lwasm_register_error(as, l, "Bit number must be fully resolved"); |
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123 return; |
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124 } |
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125 v2 = lw_expr_intval(e); |
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126 if (v2 < 0 || v2 > 7) |
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127 { |
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128 lwasm_register_error(as, l, "Invalid bit number"); |
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129 v2 = 0; |
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130 } |
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131 l -> pb = (l -> lint << 6) | (v1 << 3) | v2; |
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132 |
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133 e = lwasm_fetch_expr(l, 2); |
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134 if (lw_expr_istype(e, lw_expr_type_int)) |
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135 { |
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136 v1 = lw_expr_intval(e) & 0xFFFF; |
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137 v2 = v1 - ((l -> dpval) << 8); |
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138 if (v2 > 0xFF || v2 < 0) |
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139 { |
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140 lwasm_register_error(as, l, "Byte overflow"); |
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141 return; |
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142 } |
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143 } |
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144 lwasm_emitop(l, instab[l -> insn].ops[0]); |
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145 lwasm_emit(l, l -> pb); |
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146 lwasm_emitexpr(l, e, 1); |
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147 } |