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annotate lwasm/lwasm.c @ 351:4dba8c7e242c

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conditional pseudo ops added
author lost@starbug
date Sat, 27 Mar 2010 23:37:30 -0600
parents 11a95c6414b4
children 60568b123281
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 lwasm.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
344
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22 #define ___lwasm_c_seen___
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23
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24 #include <config.h>
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25
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26 #include <stdio.h>
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27 #include <stdarg.h>
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28 #include <string.h>
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29
337
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30 #include <lw_expr.h>
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31 #include <lw_alloc.h>
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32 #include <lw_string.h>
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33
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34 #include "lwasm.h"
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35
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36 lw_expr_t lwasm_evaluate_var(char *var, void *priv)
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37 {
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38 return NULL;
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39 }
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40
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41 lw_expr_t lwasm_evaluate_special(int t, void *ptr, void *priv)
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42 {
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43 switch (t)
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44 {
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45 case lwasm_expr_linelen:
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46 {
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47 line_t *cl = ptr;
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48 if (cl -> len == -1)
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49 return NULL;
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50 return lw_expr_build(lw_expr_type_int, cl -> len);
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51 }
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52 break;
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53
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54 case lwasm_expr_lineaddr:
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55 {
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56 line_t *cl = ptr;
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57 if (cl -> addr)
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58 return lw_expr_copy(cl -> addr);
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59 else
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60 return NULL;
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61 }
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62 }
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63 return NULL;
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64 }
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65
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66 void lwasm_register_error(asmstate_t *as, line_t *l, const char *msg, ...)
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67 {
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68 lwasm_error_t *e;
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69 va_list args;
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70 char errbuff[1024];
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71 int r;
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72
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73 if (!l)
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74 return;
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75
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76 va_start(args, msg);
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77
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78 e = lw_alloc(sizeof(lwasm_error_t));
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79
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80 e -> next = l -> err;
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81 l -> err = e;
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82
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83 as -> errorcount++;
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84
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85 r = vsnprintf(errbuff, 1024, msg, args);
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86 e -> mess = lw_strdup(errbuff);
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87
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88 va_end(args);
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89 }
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90
351
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91 void lwasm_register_warning(asmstate_t *as, line_t *l, const char *msg, ...)
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92 {
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93 lwasm_error_t *e;
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94 va_list args;
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95 char errbuff[1024];
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96 int r;
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97
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98 if (!l)
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99 return;
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100
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101 va_start(args, msg);
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102
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103 e = lw_alloc(sizeof(lwasm_error_t));
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104
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105 e -> next = l -> err;
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106 l -> err = e;
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107
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108 as -> errorcount++;
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109
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110 r = vsnprintf(errbuff, 1024, msg, args);
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111 e -> mess = lw_strdup(errbuff);
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112
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113 va_end(args);
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114 }
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115
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116 int lwasm_next_context(asmstate_t *as)
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117 {
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118 int r;
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119 r = as -> nextcontext;
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120 as -> nextcontext++;
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121 return r;
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122 }
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123
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124 void lwasm_emit(line_t *cl, int byte)
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125 {
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126 if (cl -> outputl == cl -> outputbl)
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127 {
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128 cl -> output = lw_realloc(cl -> output, cl -> outputbl + 8);
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129 cl -> outputbl += 8;
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130 }
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131 cl -> output[cl -> outputl++] = byte & 0xff;
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132 }
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133
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134 void lwasm_emitop(line_t *cl, int opc)
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135 {
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136 if (opc > 0x100)
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137 lwasm_emit(cl, opc >> 8);
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138 lwasm_emit(cl, opc);
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139 }
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140
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141 lw_expr_t lwasm_parse_term(char **p, void *priv)
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142 {
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143 asmstate_t *as = priv;
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144 int val;
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145
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146 if (!**p)
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147 return NULL;
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148
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149 if (**p == '*' || (
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150 **p == '.'
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151 && !((*p)[1] >= 'A' && (*p)[1] <= 'Z')
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152 && !((*p)[1] >= 'a' && (*p)[1] <= 'z')
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153 && !((*p)[1] >= '0' && (*p)[1] <= '9')
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154 ))
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155 {
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156 // special "symbol" for current line addr (*, .)
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157 (*p)++;
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158 return lw_expr_build(lw_expr_type_special, lwasm_expr_lineaddr, as -> cl);
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159 }
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160
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161 // branch points
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162 if (**p == '<')
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163 {
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164 (*p)++;
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165 return lw_expr_build(lw_expr_type_special, lwasm_expr_prevbp, as -> cl);
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166 }
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167 if (**p == '>')
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168 {
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169 (*p)++;
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170 return lw_expr_build(lw_expr_type_special, lwasm_expr_nextbp, as -> cl);
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171 }
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172
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173 // double ascii constant
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174 if (**p == '"')
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175 {
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176 int v;
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177 (*p)++;
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178 if (!**p)
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179 return NULL;
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180 if (!*((*p)+1))
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181 return NULL;
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182 v = (unsigned char)**p << 8 | (unsigned char)*((*p)+1);
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183 (*p) += 2;
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184 return lw_expr_build(lw_expr_type_int, v);
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185 }
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186
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187 if (**p == '\'')
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188 {
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189 int v;
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190
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191 (*p)++;
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192 if (!**p)
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193 return NULL;
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194
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195 v = (unsigned char)**p;
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196 (*p)++;
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197 return lw_expr_build(lw_expr_type_int, v);
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198 }
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199
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200 if (**p == '&')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
201 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
202 // decimal constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
203 int v = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
204 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
205
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
206 if (!strchr("0123456789", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
207 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
208
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
209 while (**p && strchr("0123456789", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
210 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
211 val = val * 10 + (**p - '0');
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
212 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
213 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
214 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
215 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
216
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
217 if (**p == '%')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
218 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
219 // binary constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
220 int v = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
221 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
222
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
223 if (**p != '0' && **p != '1')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
224 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
225
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
226 while (**p && (**p == '0' || **p == '1'))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
227 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
228 val = val * 2 + (**p - '0');
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
229 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
230 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
231 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
232 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
233
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
234 if (**p == '$')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
235 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
236 // hexadecimal constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
237 int v = 0, v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
238 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
239
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
240 if (!strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
241 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
242
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
243 while (**p && strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
244 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
245 v2 = toupper(**p) - '0';
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
246 if (v2 > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
247 v2 -= 7;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
248 val = val * 16 + v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
249 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
250 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
251 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
252 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
253
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
254 if (**p == '0' && (*((*p)+1) == 'x' || *((*p)+1) == 'X'))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
255 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
256 // hexadecimal constant, C style
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
257 int v = 0, v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
258 (*p)+=2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
259
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
260 if (!strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
261 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
262
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
263 while (**p && strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
264 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
265 v2 = toupper(**p) - '0';
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
266 if (v2 > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
267 v2 -= 7;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
268 val = val * 16 + v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
269 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
270 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
271 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
272 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
273
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
274 if (**p == '@' && (*((*p)+1) >= '0' && *((*p)+1) <= '7'))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
275 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
276 // octal constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
277 int v = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
278 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
279
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
280 if (!strchr("01234567", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
281 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
282
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
283 while (**p && strchr("01234567", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
284 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
285 val = val * 8 + (**p - '0');
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
286 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
287 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
288 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
289 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
290
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
291
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
292 // symbol or bare decimal or suffix constant here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
293 do
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
294 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
295 int havedol = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
296 int l = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
297
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
298 while ((*p)[l] && strchr(SYMCHARS, (*p)[l]))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
299 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
300 if ((*p)[l] == '$')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
301 havedol = 1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
302 l++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
303 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
304 if (l == 0)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
305 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
306
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
307 if (havedol || **p < '0' || **p > '9')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
308 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
309 // have a symbol here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
310 char *sym;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
311 lw_expr_t term;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
312
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
313 sym = lw_strndup(*p, l);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
314 (*p) += l;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
315 term = lw_expr_build(lw_expr_type_var, sym);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
316 lw_free(sym);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
317 return term;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
318 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
319 } while (0);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
320
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
321 if (!**p)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
322 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
323
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
324 // we have a numeric constant here, either decimal or postfix base notation
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
325 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
326 int decval = 0, binval = 0, hexval = 0, octval = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
327 int valtype = 15; // 1 = bin, 2 = oct, 4 = dec, 8 = hex
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
328 int bindone = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
329 int val;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
330 int dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
331
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
332 while (1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
333 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
334 if (!**p || !strchr("0123456789ABCDEFabcdefqhoQHO", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
335 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
336 // we can legally be bin or decimal here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
337 if (bindone)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
338 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
339 // just finished a binary value
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
340 val = binval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
341 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
342 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
343 else if (valtype & 4)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
344 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
345 val = decval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
346 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
347 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
348 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
349 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
350 // bad value
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
351 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
352 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
353 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
354
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
355 dval = toupper(**p);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
356 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
357
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
358 if (bindone)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
359 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
360 // any characters past "B" means it is not binary
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
361 bindone = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
362 valtype &= 14;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
363 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
364
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
365 switch (dval)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
366 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
367 case 'Q':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
368 case 'O':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
369 if (valtype & 2)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
370 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
371 val = octval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
372 valtype = -1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
373 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
374 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
375 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
376 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
377 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
378 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
379 /* can't get here */
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
380
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
381 case 'H':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
382 if (valtype & 8)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
383 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
384 val = hexval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
385 valtype = -1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
386 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
387 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
388 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
389 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
390 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
391 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
392 /* can't get here */
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
393
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
394 case 'B':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
395 // this is a bit of a sticky one since B may be a
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
396 // hex number instead of the end of a binary number
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
397 // so it falls through to the digit case
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
398 if (valtype & 1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
399 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
400 // could still be binary of hex
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
401 bindone = 1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
402 valtype = 9;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
403 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
404 /* fall through intented */
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
405
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
406 default:
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
407 // digit
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
408 dval -= '0';
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
409 if (dval > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
410 dval -= 7;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
411 if (valtype & 8)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
412 hexval = hexval * 16 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
413 if (valtype & 4)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
414 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
415 if (dval > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
416 valtype &= 11;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
417 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
418 decval = decval * 10 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
419 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
420 if (valtype & 2)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
421 {
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
422 if (dval > 7)
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
423 valtype &= 13;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
424 else
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
425 octval = octval * 8 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
426 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
427 if (valtype & 1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
428 {
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
429 if (dval > 1)
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
430 valtype &= 14;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
431 else
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
432 binval = binval * 2 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
433 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
434 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
435 if (valtype == -1)
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
436 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
437
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
438 // return if no more valid types
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
439 if (valtype == 0)
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
440 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
441
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
442 val = decval; // in case we fall through
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
443 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
444
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
445 // get here if we have a value
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
446 return lw_expr_build(lw_expr_type_int, val);
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
447 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
448 // can't get here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
449 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
450
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
451 lw_expr_t lwasm_parse_expr(asmstate_t *as, char **p)
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
452 {
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
453 lw_expr_t e;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
454
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
455 e = lw_expr_parse(p, as);
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
456
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
457 return e;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
458 }
347
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
459
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
460 void lwasm_save_expr(line_t *cl, int id, lw_expr_t expr)
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
461 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
462 struct line_expr_s *e;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
463
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
464 for (e = cl -> exprs; e; e = e -> next)
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
465 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
466 if (e -> id == id)
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
467 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
468 lw_expr_destroy(e -> expr);
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
469 e -> expr = expr;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
470 return;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
471 }
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
472 }
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
473
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
474 e = lw_alloc(sizeof(struct line_expr_s));
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
475 e -> expr = expr;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
476 e -> id = id;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
477 e -> next = cl -> exprs;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
478 cl -> exprs = e;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
479 }
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
480
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
481 lw_expr_t lwasm_fetch_expr(line_t *cl, int id)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
482 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
483 struct line_expr_s *e;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
484
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
485 for (e = cl -> exprs; e; e = e -> next)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
486 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
487 if (e -> id == id)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
488 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
489 return e -> expr;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
490 }
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
491 }
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
492 return NULL;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
493 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
494
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
495 void skip_operand(char **p)
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
496 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
497 for (; **p && !isspace(**p); (*p)++)
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
498 /* do nothing */ ;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
499 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
500
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
501 int lwasm_emitexpr(line_t *l, lw_expr_t expr, int size)
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
502 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
503 int v;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
504
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
505 if (lw_expr_istype(expr, lw_expr_type_int))
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
506 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
507 v = lw_expr_intval(expr);
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
508 }
348
11a95c6414b4 Added third func to instab to split resolve and emit logic
lost@starbug
parents: 347
diff changeset
509 // handle external/cross-section/incomplete references here
347
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
510 else
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
511 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
512 lwasm_register_error(l -> as, l, "Expression not fully resolved");
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
513 return -1;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
514 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
515
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
516 switch (size)
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
517 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
518 case 4:
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
519 lwasm_emit(l, v >> 24);
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
520 lwasm_emit(l, v >> 16);
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
521 /* fallthrough intended */
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
522
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
523 case 2:
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
524 lwasm_emit(l, v >> 8);
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
525 /* fallthrough intended */
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
526
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
527 case 1:
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
528 lwasm_emit(l, v);
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
529 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
530
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
531 return 0;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
532 }