Mercurial > hg > index.cgi
annotate lwasm/insn_bitbit.c @ 374:8e25147c2aa8
Clean up various "externs"
Apparently some compilers seriously choke on the "extern" keyword in some
circumstances where GCC does not. Remove most instances of "extern" to guard
against that.
Thanks to Erik G <erik@6809.org> for the patch.
author | William Astle <lost@l-w.ca> |
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date | Mon, 13 Jul 2015 20:31:56 -0600 |
parents | 8764142b3192 |
children | b20f14edda5a |
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, E_REGISTER_BAD); |
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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, E_OPERAND_BAD); |
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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, E_OPERAND_BAD); |
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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, E_OPERAND_BAD); |
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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, E_OPERAND_BAD); |
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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, E_OPERAND_BAD); |
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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, E_OPERAND_BAD); |
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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, E_BITNUMBER_UNRESOLVED); |
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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, E_BITNUMBER_INVALID); |
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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 { |
370
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Convert internal error/warning handling framework to a new unified system
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122 lwasm_register_error(as, l, E_BITNUMBER_UNRESOLVED); |
0
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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123 return; |
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124 } |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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125 v2 = lw_expr_intval(e); |
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126 if (v2 < 0 || v2 > 7) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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127 { |
370
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128 lwasm_register_error(as, l, E_BITNUMBER_INVALID); |
0
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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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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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132 |
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133 e = lwasm_fetch_expr(l, 2); |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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134 if (lw_expr_istype(e, lw_expr_type_int)) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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135 { |
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136 v1 = lw_expr_intval(e) & 0xFFFF; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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137 v2 = v1 - ((l -> dpval) << 8); |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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138 if (v2 > 0xFF || v2 < 0) |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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139 { |
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140 lwasm_register_error(as, l, E_BYTE_OVERFLOW); |
0
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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141 return; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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142 } |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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143 } |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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144 lwasm_emitop(l, instab[l -> insn].ops[0]); |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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145 lwasm_emit(l, l -> pb); |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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146 lwasm_emitexpr(l, e, 1); |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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147 } |