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annotate lwasm/lwasm.c @ 356:7166254491ed

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Finished pseudo ops
author lost@starbug
date Wed, 31 Mar 2010 18:46:32 -0600
parents 60568b123281
children 0cf4948d53b4
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 if (cl -> inmod)
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134 {
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135 asmstate_t *as = cl -> as;
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136 // update module CRC
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137 // this is a direct transliteration from the nitros9 asm source
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138 // to C; it can, no doubt, be optimized for 32 bit processing
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139 byte &= 0xff;
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140
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141 byte ^= (as -> crc)[0];
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142 (as -> crc)[0] = (as -> crc)[1];
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143 (as -> crc)[1] = (as -> crc)[2];
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144 (as -> crc)[1] ^= (byte >> 7);
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145 (as -> crc)[2] = (byte << 1);
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146 (as -> crc)[1] ^= (byte >> 2);
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147 (as -> crc)[2] ^= (byte << 6);
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148 byte ^= (byte << 1);
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149 byte ^= (byte << 2);
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150 byte ^= (byte << 4);
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151 if (byte & 0x80)
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152 {
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153 (as -> crc)[0] ^= 0x80;
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154 (as -> crc)[2] ^= 0x21;
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155 }
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156 }
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157 }
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158
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159 void lwasm_emitop(line_t *cl, int opc)
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160 {
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161 if (opc > 0x100)
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162 lwasm_emit(cl, opc >> 8);
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163 lwasm_emit(cl, opc);
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164 }
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165
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166 lw_expr_t lwasm_parse_term(char **p, void *priv)
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167 {
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168 asmstate_t *as = priv;
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169 int val;
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170
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171 if (!**p)
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172 return NULL;
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173
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174 if (**p == '*' || (
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175 **p == '.'
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176 && !((*p)[1] >= 'A' && (*p)[1] <= 'Z')
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177 && !((*p)[1] >= 'a' && (*p)[1] <= 'z')
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178 && !((*p)[1] >= '0' && (*p)[1] <= '9')
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179 ))
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180 {
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181 // special "symbol" for current line addr (*, .)
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182 (*p)++;
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183 return lw_expr_build(lw_expr_type_special, lwasm_expr_lineaddr, as -> cl);
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184 }
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185
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186 // branch points
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187 if (**p == '<')
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188 {
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189 (*p)++;
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190 return lw_expr_build(lw_expr_type_special, lwasm_expr_prevbp, as -> cl);
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191 }
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192 if (**p == '>')
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193 {
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194 (*p)++;
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195 return lw_expr_build(lw_expr_type_special, lwasm_expr_nextbp, as -> cl);
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196 }
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197
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
198 // double ascii constant
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
199 if (**p == '"')
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
200 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
201 int v;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
202 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
203 if (!**p)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
204 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
205 if (!*((*p)+1))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
206 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
207 v = (unsigned char)**p << 8 | (unsigned char)*((*p)+1);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
208 (*p) += 2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
209 return lw_expr_build(lw_expr_type_int, v);
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
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
212 if (**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 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 (*p)++;
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 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
219
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
220 v = (unsigned char)**p;
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 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
223 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
224
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
225 if (**p == '&')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
226 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
227 // decimal constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
228 int v = 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 if (!strchr("0123456789", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
232 return NULL;
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 while (**p && strchr("0123456789", **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 val = val * 10 + (**p - '0');
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
237 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
238 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
239 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
240 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
241
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
242 if (**p == '%')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
243 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
244 // binary constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
245 int v = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
246 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
247
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
248 if (**p != '0' && **p != '1')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
249 return NULL;
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 while (**p && (**p == '0' || **p == '1'))
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 val = val * 2 + (**p - '0');
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
254 (*p)++;
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 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
257 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
258
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
259 if (**p == '$')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
260 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
261 // hexadecimal constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
262 int v = 0, v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
263 (*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 if (!strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
266 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
267
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
268 while (**p && strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
269 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
270 v2 = toupper(**p) - '0';
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
271 if (v2 > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
272 v2 -= 7;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
273 val = val * 16 + v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
274 (*p)++;
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 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
277 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
278
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
279 if (**p == '0' && (*((*p)+1) == 'x' || *((*p)+1) == 'X'))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
280 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
281 // hexadecimal constant, C style
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
282 int v = 0, v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
283 (*p)+=2;
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 if (!strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
286 return NULL;
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 while (**p && strchr("0123456789abcdefABCDEF", **p))
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 v2 = toupper(**p) - '0';
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
291 if (v2 > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
292 v2 -= 7;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
293 val = val * 16 + v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
294 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
295 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
296 return lw_expr_build(lw_expr_type_int, v);
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
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
299 if (**p == '@' && (*((*p)+1) >= '0' && *((*p)+1) <= '7'))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
300 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
301 // octal constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
302 int v = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
303 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
304
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
305 if (!strchr("01234567", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
306 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
307
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
308 while (**p && strchr("01234567", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
309 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
310 val = val * 8 + (**p - '0');
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
311 (*p)++;
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 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
314 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
315
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
316
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
317 // symbol or bare decimal or suffix constant here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
318 do
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
319 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
320 int havedol = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
321 int l = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
322
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
323 while ((*p)[l] && strchr(SYMCHARS, (*p)[l]))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
324 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
325 if ((*p)[l] == '$')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
326 havedol = 1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
327 l++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
328 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
329 if (l == 0)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
330 return NULL;
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 if (havedol || **p < '0' || **p > '9')
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 // have a symbol here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
335 char *sym;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
336 lw_expr_t term;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
337
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
338 sym = lw_strndup(*p, l);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
339 (*p) += l;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
340 term = lw_expr_build(lw_expr_type_var, sym);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
341 lw_free(sym);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
342 return term;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
343 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
344 } while (0);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
345
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
346 if (!**p)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
347 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
348
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
349 // 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
350 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
351 int decval = 0, binval = 0, hexval = 0, octval = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
352 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
353 int bindone = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
354 int val;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
355 int dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
356
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
357 while (1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
358 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
359 if (!**p || !strchr("0123456789ABCDEFabcdefqhoQHO", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
360 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
361 // we can legally be bin or decimal here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
362 if (bindone)
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 // just finished a binary value
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
365 val = binval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
366 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
367 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
368 else if (valtype & 4)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
369 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
370 val = decval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
371 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
372 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
373 else
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 // bad value
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
376 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
377 }
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
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
380 dval = toupper(**p);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
381 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
382
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
383 if (bindone)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
384 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
385 // any characters past "B" means it is not binary
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
386 bindone = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
387 valtype &= 14;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
388 }
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 switch (dval)
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 case 'Q':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
393 case 'O':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
394 if (valtype & 2)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
395 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
396 val = octval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
397 valtype = -1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
398 break;
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 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
401 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
402 return NULL;
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 /* can't get here */
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 case 'H':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
407 if (valtype & 8)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
408 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
409 val = hexval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
410 valtype = -1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
411 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
412 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
413 else
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 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
416 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
417 /* can't get here */
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
418
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
419 case 'B':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
420 // 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
421 // hex number instead of the end of a binary number
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
422 // so it falls through to the digit case
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
423 if (valtype & 1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
424 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
425 // could still be binary of hex
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
426 bindone = 1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
427 valtype = 9;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
428 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
429 /* fall through intented */
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
430
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
431 default:
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
432 // digit
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
433 dval -= '0';
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
434 if (dval > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
435 dval -= 7;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
436 if (valtype & 8)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
437 hexval = hexval * 16 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
438 if (valtype & 4)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
439 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
440 if (dval > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
441 valtype &= 11;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
442 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
443 decval = decval * 10 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
444 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
445 if (valtype & 2)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
446 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
447 if (dval > 7)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
448 valtype &= 13;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
449 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
450 octval = octval * 8 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
451 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
452 if (valtype & 1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
453 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
454 if (dval > 1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
455 valtype &= 14;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
456 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
457 binval = binval * 2 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
458 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
459 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
460 if (valtype == -1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
461 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
462
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
463 // return if no more valid types
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
464 if (valtype == 0)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
465 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
466
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
467 val = decval; // in case we fall through
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
468 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
469
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
470 // get here if we have a value
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
471 return lw_expr_build(lw_expr_type_int, val);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
472 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
473 // can't get here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
474 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
475
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
476 lw_expr_t lwasm_parse_expr(asmstate_t *as, char **p)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
477 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
478 lw_expr_t e;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
479
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
480 e = lw_expr_parse(p, as);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
481
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
482 return e;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
483 }
347
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
484
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
485 void lwasm_save_expr(line_t *cl, int id, lw_expr_t expr)
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 struct line_expr_s *e;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
488
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
489 for (e = cl -> exprs; e; e = e -> next)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
490 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
491 if (e -> id == id)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
492 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
493 lw_expr_destroy(e -> expr);
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
494 e -> expr = expr;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
495 return;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
496 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
497 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
498
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
499 e = lw_alloc(sizeof(struct line_expr_s));
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
500 e -> expr = expr;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
501 e -> id = id;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
502 e -> next = cl -> exprs;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
503 cl -> exprs = e;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
504 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
505
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
506 lw_expr_t lwasm_fetch_expr(line_t *cl, int id)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
507 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
508 struct line_expr_s *e;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
509
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
510 for (e = cl -> exprs; e; e = e -> next)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
511 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
512 if (e -> id == id)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
513 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
514 return e -> expr;
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 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
517 return NULL;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
518 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
519
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
520 void skip_operand(char **p)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
521 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
522 for (; **p && !isspace(**p); (*p)++)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
523 /* do nothing */ ;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
524 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
525
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
526 int lwasm_emitexpr(line_t *l, lw_expr_t expr, int size)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
527 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
528 int 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 if (lw_expr_istype(expr, lw_expr_type_int))
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
531 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
532 v = lw_expr_intval(expr);
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
533 }
348
11a95c6414b4 Added third func to instab to split resolve and emit logic
lost@starbug
parents: 347
diff changeset
534 // handle external/cross-section/incomplete references here
347
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
535 else
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
536 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
537 lwasm_register_error(l -> as, l, "Expression not fully resolved");
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
538 return -1;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
539 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
540
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
541 switch (size)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
542 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
543 case 4:
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
544 lwasm_emit(l, v >> 24);
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
545 lwasm_emit(l, v >> 16);
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
546 /* fallthrough intended */
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
547
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
548 case 2:
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
549 lwasm_emit(l, v >> 8);
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
550 /* fallthrough intended */
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
551
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
552 case 1:
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
553 lwasm_emit(l, v);
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
554 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
555
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
556 return 0;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
557 }