annotate lwasm/insn_indexed.c @ 371:9c24d9d485b9

Much bugfixing
author lost@starbug
date Wed, 21 Apr 2010 23:29:18 -0600
parents 7d91ab7ac7d6
children 8f9d72cfb897
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1 /*
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2 insn_indexed.c
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3 Copyright © 2009 William Astle
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4
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5 This file is part of LWASM.
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6
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7 LWASM is free software: you can redistribute it and/or modify it under the
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8 terms of the GNU General Public License as published by the Free Software
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9 Foundation, either version 3 of the License, or (at your option) any later
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10 version.
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11
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12 This program is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 You should have received a copy of the GNU General Public License along with
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18 this program. If not, see <http://www.gnu.org/licenses/>.
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19 */
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20
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21 /*
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22 for handling indexed mode instructions
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23 */
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24
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25 #include <config.h>
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26
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27 #include <ctype.h>
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28 #include <string.h>
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29
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30 #include <lw_expr.h>
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31
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32 #include "lwasm.h"
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33 #include "instab.h"
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34
359
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35 /*
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36 l -> lint: size of operand (0, 1, 2, -1 if not determined)
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37 l -> pb: actual post byte (from "resolve" stage) or info passed
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38 forward to the resolve stage (if l -> line is -1); 0x80 is indir
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39 bits 0-2 are register number
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40 */
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41 void insn_parse_indexed_aux(asmstate_t *as, line_t *l, char **p)
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42 {
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43 struct opvals { char *opstr; int pb; };
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44
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45 static const char *regs = "X Y U S W PCRPC ";
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46 static const struct opvals simpleindex[] =
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47 {
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48 {",x", 0x84}, {",y", 0xa4}, {",u", 0xc4}, {",s", 0xe4},
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49 {",x+", 0x80}, {",y+", 0xa0}, {",u+", 0xc0}, {",s+", 0xe0},
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50 {",x++", 0x81}, {",y++", 0xa1}, {",u++", 0xc1}, {",s++", 0xe1},
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51 {",-x", 0x82}, {",-y", 0xa2}, {",-u", 0xc2}, {",-s", 0xe2},
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52 {",--x", 0x83}, {",--y", 0xa3}, {",--u", 0xc3}, {",--s", 0xe3},
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53 {"a,x", 0x86}, {"a,y", 0xa6}, {"a,u", 0xc6}, {"a,s", 0xe6},
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54 {"b,x", 0x85}, {"b,y", 0xa5}, {"b,u", 0xc5}, {"b,s", 0xe5},
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55 {"e,x", 0x87}, {"e,y", 0xa7}, {"e,u", 0xc7}, {"e,s", 0xe7},
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56 {"f,x", 0x8a}, {"f,y", 0xaa}, {"f,u", 0xca}, {"f,s", 0xea},
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57 {"d,x", 0x8b}, {"d,y", 0xab}, {"d,u", 0xcb}, {"d,s", 0xed},
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58 {"w,x", 0x8e}, {"w,y", 0xae}, {"w,u", 0xce}, {"w,s", 0xee},
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59 {",w", 0x8f}, {",w++", 0xcf}, {",--w", 0xef},
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60
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61 {"[,x]", 0x94}, {"[,y]", 0xb4}, {"[,u", 0xd4}, {"[,s]", 0xf4},
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62 {"[,x++]", 0x91}, {"[,y++]", 0xb1}, {"[,u++]", 0xd1}, {"[,s++]", 0xf1},
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63 {"[,--x]", 0x93}, {"[,--y]", 0xb3}, {"[,--u]", 0xd3}, {"[,--s]", 0xf3},
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64 {"[a,x]", 0x96}, {"[a,y]", 0xb6}, {"[a,u]", 0xd6}, {"[a,s]", 0xf6},
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65 {"[b,x]", 0x95}, {"[b,y]", 0xb5}, {"[b,u]", 0xd5}, {"[b,s]", 0xf5},
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66 {"[e,x]", 0x97}, {"[e,y]", 0xb7}, {"[e,u]", 0xd7}, {"[e,s]", 0xf7},
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67 {"[f,x]", 0x9a}, {"[f,y]", 0xba}, {"[f,u]", 0xda}, {"[f,s]", 0xfa},
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68 {"[d,x]", 0x9b}, {"[d,y]", 0xbb}, {"[d,u]", 0xdb}, {"[d,s]", 0xfd},
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69 {"[w,x]", 0x9e}, {"[w,y]", 0xbe}, {"[w,u]", 0xde}, {"[w,s]", 0xfe},
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70 {"[,w]", 0x90}, {"[,w++]", 0xd0}, {"[,--w]", 0xf0},
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71
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72 { "", -1 }
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73 };
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74
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75 static const char *regs9 = "X Y U S PCRPC ";
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76 static const struct opvals simpleindex9[] =
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77 {
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78 {",x", 0x84}, {",y", 0xa4}, {",u", 0xc4}, {",s", 0xe4},
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79 {",x+", 0x80}, {",y+", 0xa0}, {",u+", 0xc0}, {",s+", 0xe0},
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80 {",x++", 0x81}, {",y++", 0xa1}, {",u++", 0xc1}, {",s++", 0xe1},
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81 {",-x", 0x82}, {",-y", 0xa2}, {",-u", 0xc2}, {",-s", 0xe2},
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82 {",--x", 0x83}, {",--y", 0xa3}, {",--u", 0xc3}, {",--s", 0xe3},
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83 {"a,x", 0x86}, {"a,y", 0xa6}, {"a,u", 0xc6}, {"a,s", 0xe6},
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84 {"b,x", 0x85}, {"b,y", 0xa5}, {"b,u", 0xc5}, {"b,s", 0xe5},
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85 {"d,x", 0x8b}, {"d,y", 0xab}, {"d,u", 0xcb}, {"d,s", 0xed},
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86
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87 {"[,x]", 0x94}, {"[,y]", 0xb4}, {"[,u", 0xd4}, {"[,s]", 0xf4},
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88 {"[,x++]", 0x91}, {"[,y++]", 0xb1}, {"[,u++]", 0xd1}, {"[,s++]", 0xf1},
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89 {"[,--x]", 0x93}, {"[,--y]", 0xb3}, {"[,--u]", 0xd3}, {"[,--s]", 0xf3},
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90 {"[a,x]", 0x96}, {"[a,y]", 0xb6}, {"[a,u]", 0xd6}, {"[a,s]", 0xf6},
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91 {"[b,x]", 0x95}, {"[b,y]", 0xb5}, {"[b,u]", 0xd5}, {"[b,s]", 0xf5},
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92 {"[d,x]", 0x9b}, {"[d,y]", 0xbb}, {"[d,u]", 0xdb}, {"[d,s]", 0xfd},
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93
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94 { "", -1 }
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95 };
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96 char stbuf[25];
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97 int i, j, rn;
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98 int indir = 0;
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99 int f0 = 1;
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100 const struct opvals *simples;
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101 const char *reglist;
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102 lw_expr_t e;
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103
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104 if (as -> target == TARGET_6809)
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105 {
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106 simples = simpleindex9;
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107 reglist = regs9;
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108 }
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109 else
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110 {
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111 simples = simpleindex;
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112 reglist = regs;
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113 }
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114
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115 // fetch out operand for lookup
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116 for (i = 0; i < 24; i++)
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117 {
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118 if (*((*p) + i) && !isspace(*((*p) + i)))
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119 stbuf[i] = *((*p) + i);
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120 else
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121 break;
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122 }
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123 stbuf[i] = '\0';
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124
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125 // now look up operand in "simple" table
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126 if (!*((*p) + i) || isspace(*((*p) + i)))
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127 {
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128 // do simple lookup
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129 for (j = 0; simples[j].opstr[0]; j++)
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130 {
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131 if (!strcasecmp(stbuf, simples[j].opstr))
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132 break;
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133 }
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134 if (simples[j].opstr[0])
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135 {
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136 l -> pb = simples[j].pb;
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137 l -> lint = 0;
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138 (*p) += i;
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139 return;
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140 }
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141 }
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142
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143 // now do the "hard" ones
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144
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145 // is it indirect?
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146 if (**p == '[')
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147 {
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148 indir = 1;
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149 (*p)++;
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150 }
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151
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152 // look for a "," - all indexed modes have a "," except extended indir
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153 rn = 0;
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154 for (i = 0; (*p)[i] && !isspace((*p)[i]); i++)
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155 {
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156 if ((*p)[i] == ',')
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157 {
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158 rn = 1;
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159 break;
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160 }
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161 }
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162
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163 // if no "," and indirect, do extended indir
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164 if (!rn && indir)
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165 {
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166 // extended indir
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167 l -> pb = 0x9f;
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168 e = lwasm_parse_expr(as, p);
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169 if (!e || **p != ']')
339
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170 {
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171 lwasm_register_error(as, l, "Bad operand");
339
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172 return;
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173 }
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174
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175 (*p)++;
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176 l -> lint = 2;
339
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177 return;
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178 }
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179
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180 if (**p == '<')
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181 {
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182 l -> lint = 1;
339
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183 (*p)++;
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184 }
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185 else if (**p == '>')
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186 {
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187 l -> lint = 2;
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
188 (*p)++;
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
189 }
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
190
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
191 if (**p == '0' && *(*p+1) == ',')
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
192 {
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
193 f0 = 1;
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
194 }
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
195
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
196 // now we have to evaluate the expression
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
197 e = lwasm_parse_expr(as, p);
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
198 if (!e)
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
199 {
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
200 lwasm_register_error(as, l, "Bad operand");
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
201 return;
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
202 }
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
203 lwasm_save_expr(l, 0, e);
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
204
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
205 // now look for a comma; if not present, explode
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
206 if (*(*p)++ != ',')
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
207 {
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
208 lwasm_register_error(as, l, "Bad operand");
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
209 return;
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
210 }
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
211
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
212 // now get the register
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
213 rn = lwasm_lookupreg3(reglist, p);
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
214 if (rn < 0)
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
215 {
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
216 lwasm_register_error(as, l, "Bad register");
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
217 return;
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
218 }
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
219
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
220 if (indir)
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
221 {
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
222 if (**p != ']')
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
223 {
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
224 lwasm_register_error(as, l, "Bad operand");
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
225 return;
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
226 }
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
227 else
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
228 (*p)++;
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
229 }
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
230
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
231 // nnnn,W is only 16 bit (or 0 bit)
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
232 if (rn == 4)
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
233 {
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
234 if (l -> lint == 1)
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
235 {
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
236 lwasm_register_error(as, l, "n,W cannot be 8 bit");
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
237 return;
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
238 }
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
239
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
240 if (l -> lint == 2)
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
241 {
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
242 l -> pb = indir ? 0xb0 : 0xcf;
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
243 l -> lint = 2;
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
244 return;
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
245 }
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
246
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
247 l -> pb = (0x80 * indir) | rn;
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
248
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
249 /* [,w] and ,w
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
250 if (indir)
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
251 *b1 = 0x90;
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
252 else
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
253 *b1 = 0x8f;
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
254 */
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
255 return;
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
256 }
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
257
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
258 // PCR? then we have PC relative addressing (like B??, LB??)
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
259 if (rn == 5)
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
260 {
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
261 lw_expr_t e1, e2;
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
262 // external references are handled exactly the same as for
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
263 // relative addressing modes
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
264 // on pass 1, adjust the expression for a subtraction of the
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
265 // current address
371
9c24d9d485b9 Much bugfixing
lost@starbug
parents: 360
diff changeset
266 // e - (addr + linelen) => e - addr - linelen
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
267
371
9c24d9d485b9 Much bugfixing
lost@starbug
parents: 360
diff changeset
268 e2 = lw_expr_build(lw_expr_type_special, lwasm_expr_linelen, l);
9c24d9d485b9 Much bugfixing
lost@starbug
parents: 360
diff changeset
269 e1 = lw_expr_build(lw_expr_type_oper, lw_expr_oper_minus, e, e2);
9c24d9d485b9 Much bugfixing
lost@starbug
parents: 360
diff changeset
270 lw_expr_destroy(e2);
9c24d9d485b9 Much bugfixing
lost@starbug
parents: 360
diff changeset
271 e2 = lw_expr_build(lw_expr_type_oper, lw_expr_oper_minus, e1, l -> addr);
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
272 lw_expr_destroy(e1);
371
9c24d9d485b9 Much bugfixing
lost@starbug
parents: 360
diff changeset
273 lwasm_save_expr(l, 0, e2);
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
274 }
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
275
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
276 l -> pb = (indir * 0x80) | rn | (f0 * 0x40);
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
277 }
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
278
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
279 PARSEFUNC(insn_parse_indexed)
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
280 {
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
281 l -> lint = -1;
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
282 insn_parse_indexed_aux(as, l, p);
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
283
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
284 if (l -> lint != -1)
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
285 {
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
286 l -> len = OPLEN(instab[l -> insn].ops[0]) + l -> lint + 1;
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
287 }
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
288 }
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
289
360
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
290 void insn_resolve_indexed_aux(asmstate_t *as, line_t *l, int force)
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
291 {
360
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
292 // here, we have an expression which needs to be
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
293 // resolved; the post byte is determined here as well
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
294 lw_expr_t e;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
295
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
296 e = lwasm_fetch_expr(l, 0);
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
297 if (lw_expr_istype(e, lw_expr_type_int))
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
298 {
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
299 // we know how big it is
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
300 int v;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
301 v = lw_expr_intval(e);
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
302 if (v < -128 || v > 127)
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
303 {
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
304 l -> lint = 2;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
305 switch (l -> pb & 0x07)
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
306 {
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
307 case 0:
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
308 case 1:
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
309 case 2:
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
310 case 3:
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
311 v = 0x89 | (l -> pb & 0x03) | (0x10 * (l -> pb & 0x80));
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
312 break;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
313
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
314 case 4: // W
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
315 v = (l -> pb & 0x80) ? 0xD0 : 0xCF;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
316 break;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
317
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
318 case 5: // PCR
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
319 case 6: // PC
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
320 v = (l -> pb & 0x80) ? 0x9D : 0x8D;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
321 break;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
322 }
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
323
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
324 return;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
325 }
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
326 else if ((l -> pb & 0x80) || ((l -> pb & 0x07) > 3) || v < -16 || v > 15)
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
327 {
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
328 // if not a 5 bit value, is indirect, or is not X,Y,U,S
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
329 l -> lint = 1;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
330 switch (l -> pb & 0x07)
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
331 {
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
332 case 0:
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
333 case 1:
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
334 case 2:
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
335 case 3:
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
336 v = 0x88 | (l -> pb & 0x03) | (0x10 * (l -> pb & 0x80));
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
337 break;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
338
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
339 case 4: // W
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
340 // use 16 bit because W doesn't have 8 bit, unless 0
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
341 if (v == 0 && !(CURPRAGMA(l, PRAGMA_NOINDEX0TONONE) || l -> pb & 0x40))
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
342 {
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
343 v = (l -> pb & 0x80) ? 0x90 : 0x8F;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
344 l -> lint = 0;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
345 }
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
346 else
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
347 {
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
348 v = (l -> pb & 0x80) ? 0xD0 : 0xCF;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
349 l -> lint = 2;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
350 }
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
351 break;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
352
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
353 case 5: // PCR
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
354 case 6: // PC
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
355 v = (l -> pb & 0x80) ? 0x9C : 0x8C;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
356 break;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
357 }
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
358
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
359 return;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
360 }
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
361 else
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
362 {
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
363 // we have X,Y,U,S and a possible 15 bit here
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
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parents: 359
diff changeset
364 l -> lint = 0;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
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parents: 359
diff changeset
365
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
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parents: 359
diff changeset
366 if (v == 0 && !(CURPRAGMA(l, PRAGMA_NOINDEX0TONONE) || l -> pb & 0x40))
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parents: 359
diff changeset
367 {
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
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parents: 359
diff changeset
368 v = (l -> pb & 0x03) << 5 | v & 0x1F;
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parents: 359
diff changeset
369 }
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
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parents: 359
diff changeset
370 else
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
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parents: 359
diff changeset
371 v = (l -> pb & 0x03) << 5 | 0x84;
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parents: 359
diff changeset
372 return;
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parents: 359
diff changeset
373 }
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
374 }
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
375 else
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
376 {
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
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parents: 359
diff changeset
377 // we don't know how big it is
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parents: 359
diff changeset
378 if (!force)
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
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parents: 359
diff changeset
379 return;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
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parents: 359
diff changeset
380 // force 16 bit if we don't know
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parents: 359
diff changeset
381 l -> lint = 2;
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
382 }
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
383 }
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
384
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
385 RESOLVEFUNC(insn_resolve_indexed)
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
386 {
360
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
387 if (l -> lint == -1)
7d91ab7ac7d6 Indexed stage 2; set line structure to track pragmas in effect for that line
lost@starbug
parents: 359
diff changeset
388 insn_resolve_indexed_aux(as, l, force);
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
389
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
390 if (l -> lint != -1 && l -> pb != -1)
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
391 {
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
392 l -> len = OPLEN(instab[l -> insn].ops[0]) + l -> lint + 1;
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
393 }
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
394 }
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
395
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
396 void insn_emit_indexed_aux(asmstate_t *as, line_t *l)
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
397 {
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
398 lw_expr_t e;
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
399
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
400 lwasm_emitop(l, instab[l -> insn].ops[0]);
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
401 lwasm_emitop(l, l -> pb);
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
402 if (l -> lint > 0)
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
403 {
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
404 e = lwasm_fetch_expr(l, 0);
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
405 lwasm_emitexpr(l, e, l -> lint);
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
406 }
339
eb230fa7d28e Prepare for migration to hg
lost
parents:
diff changeset
407 }
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
408
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
409 EMITFUNC(insn_emit_indexed)
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
410 {
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
411 insn_emit_indexed_aux(as, l);
f50a54d0293a Indexed part 1
lost@starbug
parents: 339
diff changeset
412 }