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annotate lwasm/insn_bitbit.c @ 359:f318407d2469
Fix some signedness mismatches
Use size_t instead of int for stuff that's going to be compared with the
strlen() return value. While not technically wrong to use int, it does seem
to attract warnings from some compilers. Technically, since it's also the
return value from strtol(), there should be one variable that is long and
another that is size_t but that's just getting crazy.
Thanks to Erik G <erik@6809.org> for pointing these ones out.
author | William Astle <lost@l-w.ca> |
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date | Tue, 26 May 2015 17:49:26 -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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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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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 } |