annotate lwcc/cc-gencode.c @ 558:7fb2047ccdee

Flag version number to indicate ongoing development
author William Astle <lost@l-w.ca>
date Fri, 08 Sep 2023 00:35:43 -0600
parents 59b8c8b15bd4
children
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1 /*
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2 lwcc/cc-gencode.c
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3
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4 Copyright © 2019 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
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22 #include <stdio.h>
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23 #include <stdlib.h>
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24 #include <string.h>
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25
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26 #include <lw_alloc.h>
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27 #include <lw_string.h>
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28
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29 #include "tree.h"
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30
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31 char *generate_nextlabel(void)
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32 {
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33 static int labelnum = 0;
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34 char buf[16];
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35
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36 sprintf(buf, "L%d", labelnum++);
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37 return lw_strdup(buf);
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38 }
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39
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40 void generate_code(node_t *n, FILE *output);
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41
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42 void generate_code_shift(node_t *n, FILE *output, int dir)
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43 {
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44 generate_code(n -> children, output);
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45 if (n -> children -> next_child -> type == NODE_CONST_INT)
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46 {
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47 long ival;
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48 int i;
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49 ival = strtol(n -> children -> next_child -> strval, NULL, 0);
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50 if (ival <= 0)
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51 return;
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52 if (ival >= 16)
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53 {
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54 fprintf(output, "\tldd #%d\n", dir == 1 ? 0 : -1);
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55 return;
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56 }
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57 if (ival >= 8)
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58 {
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59 if (dir == 1)
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60 {
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61 fprintf(output, "\ttfr b,a\n\tclrb\n");
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62 for (i = ival - 8; i > 0; i--)
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63 {
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64 fprintf(output, "\tlsla\n");
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65 }
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66 }
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67 else
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68 {
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69 fprintf(output, "\ttfr a,b\n\tsex\n");
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70 for (i = ival - 8; i > 0; i--)
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71 {
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72 fprintf(output, "\tasrb\n");
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73 }
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74 }
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75 return;
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76 }
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77 for (i = ival; i > 0; i--)
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78 {
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79 if (dir == 1)
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80 {
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81 fprintf(output, "\taslb\n\trola\n");
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82 }
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83 else
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84 {
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85 fprintf(output, "\tasra\n\trorb\n");
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86 }
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87 }
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88 return;
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89 }
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90 else
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91 {
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92 fprintf(output, "\tpshs d\n");
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93 generate_code(n -> children -> next_child, output);
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94 fprintf(output, "\tjsr ___%ssh16\n\tpuls d\n", dir == 1 ? "l" : "r");
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95 }
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96 }
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97
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98
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99 void generate_code(node_t *n, FILE *output)
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100 {
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101 node_t *nn;
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102 char *label1, *label2;
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103
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104 switch (n -> type)
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105 {
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106 // function definition - output prologue, then statements, then epilogue
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107 case NODE_FUNDEF:
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108 fprintf(output, "\tsection .text\n\texport _%s\n_%s\n", n->children->next_child->strval, n->children->next_child->strval);
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109 generate_code(n->children->next_child->next_child->next_child, output);
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110 fprintf(output, "\trts\n");
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111 break;
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112
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113 case NODE_CONST_INT:
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114 fprintf(output, "\tldd #%s\n", n->strval);
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115 break;
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116
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117 case NODE_OPER_PLUS:
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118 generate_code(n->children, output);
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119 fprintf(output, "\tpshs d\n");
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120 generate_code(n->children->next_child, output);
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121 fprintf(output, "\taddd ,s++\n");
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122 break;
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123
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124 case NODE_OPER_MINUS:
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125 generate_code(n->children, output);
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126 fprintf(output, "\tpshs d,x\n");
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127 generate_code(n->children->next_child, output);
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128 fprintf(output, "\tstd 2,s\n\tpuls d\n\tsubd ,s++\n");
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129 break;
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130
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131 case NODE_OPER_TIMES:
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132 generate_code(n -> children, output);
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133 fprintf(output, "\tpshs d\n");
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134 generate_code(n->children->next_child, output);
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135 fprintf(output, "\tjsr ___mul16i\n\tpuls d\n");
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136 break;
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137
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138 case NODE_OPER_DIVIDE:
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139 generate_code(n -> children, output);
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140 fprintf(output, "\tpshs d\n");
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141 generate_code(n->children->next_child, output);
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142 fprintf(output, "\tjsr ___div16i\n\tpuls d\n");
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143 break;
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144
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145 case NODE_OPER_MOD:
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146 generate_code(n -> children, output);
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parents: 501
diff changeset
147 fprintf(output, "\tpshs d\n");
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
148 generate_code(n -> children -> next_child, output);
505
59b8c8b15bd4 Add integer shifts and fix code template errors for mul/div/mod
William Astle <lost@l-w.ca>
parents: 502
diff changeset
149 fprintf(output, "\tjsr ___mod16i\n\tpuls d\n");
59b8c8b15bd4 Add integer shifts and fix code template errors for mul/div/mod
William Astle <lost@l-w.ca>
parents: 502
diff changeset
150 break;
59b8c8b15bd4 Add integer shifts and fix code template errors for mul/div/mod
William Astle <lost@l-w.ca>
parents: 502
diff changeset
151
59b8c8b15bd4 Add integer shifts and fix code template errors for mul/div/mod
William Astle <lost@l-w.ca>
parents: 502
diff changeset
152 case NODE_OPER_LSH:
59b8c8b15bd4 Add integer shifts and fix code template errors for mul/div/mod
William Astle <lost@l-w.ca>
parents: 502
diff changeset
153 generate_code_shift(n, output, 1);
59b8c8b15bd4 Add integer shifts and fix code template errors for mul/div/mod
William Astle <lost@l-w.ca>
parents: 502
diff changeset
154 break;
59b8c8b15bd4 Add integer shifts and fix code template errors for mul/div/mod
William Astle <lost@l-w.ca>
parents: 502
diff changeset
155
59b8c8b15bd4 Add integer shifts and fix code template errors for mul/div/mod
William Astle <lost@l-w.ca>
parents: 502
diff changeset
156 case NODE_OPER_RSH:
59b8c8b15bd4 Add integer shifts and fix code template errors for mul/div/mod
William Astle <lost@l-w.ca>
parents: 502
diff changeset
157 generate_code_shift(n, output, 0);
502
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
158 break;
501
f3e9732973f1 Add basic integer operations to lwcc
William Astle <lost@l-w.ca>
parents: 499
diff changeset
159
502
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
160 case NODE_OPER_COND:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
161 label1 = generate_nextlabel();
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
162 label2 = generate_nextlabel();
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
163 generate_code(n -> children, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
164 fprintf(output, "\tsubd #0\n\tbeq %s\n", label1);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
165 generate_code(n -> children -> next_child, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
166 fprintf(output, "\tbra %s\n%s\n", label2, label1);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
167 generate_code(n -> children -> next_child -> next_child, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
168 fprintf(output, "%s\n", label2);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
169 lw_free(label1);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
170 lw_free(label2);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
171 break;
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
172
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
173 case NODE_OPER_COMMA:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
174 generate_code(n -> children, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
175 generate_code(n -> children -> next_child, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
176 break;
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
177
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
178 case NODE_OPER_BWAND:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
179 generate_code(n -> children, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
180 fprintf(output, "\tpshs d\n");
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
181 generate_code(n -> children -> next_child, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
182 fprintf(output, "\tandb 1,s\n\tanda ,s++\n");
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
183 break;
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
184
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
185 case NODE_OPER_BWOR:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
186 generate_code(n -> children, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
187 fprintf(output, "\tpshs d\n");
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
188 generate_code(n -> children -> next_child, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
189 fprintf(output, "\torb 1,s\n\tora ,s++\n");
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
190 break;
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
191
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
192 case NODE_OPER_BWXOR:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
193 generate_code(n -> children, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
194 fprintf(output, "\tpshs d\n");
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
195 generate_code(n -> children -> next_child, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
196 fprintf(output, "\teorb 1,s\n\teora ,s++\n");
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
197 break;
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
198
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
199 case NODE_OPER_BAND:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
200 label1 = generate_nextlabel();
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
201 generate_code(n -> children, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
202 fprintf(output, "\tsubd #0\n\tbeq %s\n", label1);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
203 generate_code(n -> children -> next_child, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
204 fprintf(output, "\tsubd #0\n\tbeq %s\n\tldd #1\n%s\n", label1, label1);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
205 lw_free(label1);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
206 break;
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
207
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
208 case NODE_OPER_BOR:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
209 label1 = generate_nextlabel();
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
210 label2 = generate_nextlabel();
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
211 generate_code(n -> children, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
212 fprintf(output, "\tsubd #0\n\tbne %s\n", label1);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
213 generate_code(n -> children -> next_child, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
214 fprintf(output, "\tsubd #0\n\tbeq %s\n%s\tldd #1\n%s\n", label2, label1, label2);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
215 lw_free(label1);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
216 lw_free(label2);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
217 break;
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
218
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
219 case NODE_OPER_NE:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
220 case NODE_OPER_EQ:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
221 case NODE_OPER_LT:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
222 case NODE_OPER_GT:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
223 case NODE_OPER_LE:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
224 case NODE_OPER_GE:
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
225 generate_code(n -> children, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
226 fprintf(output, "\tpshs d\n");
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
227 generate_code(n -> children -> next_child, output);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
228 fprintf(output, "\tsubd ,s++\n");
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
229 label1 = generate_nextlabel();
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
230 label2 = generate_nextlabel();
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
231 fprintf(output, "\t%s %s\n", (
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
232 (n -> type == NODE_OPER_NE ? "bne" :
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
233 (n -> type == NODE_OPER_EQ ? "beq" :
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
234 (n -> type == NODE_OPER_LT ? "bge" :
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
235 (n -> type == NODE_OPER_GT ? "ble" :
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
236 (n -> type == NODE_OPER_LE ? "bgt" :
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
237 (n -> type == NODE_OPER_GE ? "blt" :
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
238 "foobar"))))))
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
239 ), label1);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
240 fprintf(output, "\tldd #0\n\tbra %s\n%s\tldd #1\n%s\n", label2, label1, label2);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
241 lw_free(label1);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
242 lw_free(label2);
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
243 break;
14a40f8bb4eb Add various operators to lwcc
William Astle <lost@l-w.ca>
parents: 501
diff changeset
244
499
c3099c5d9d3e Add very simple code generator
William Astle <lost@l-w.ca>
parents:
diff changeset
245 default:
c3099c5d9d3e Add very simple code generator
William Astle <lost@l-w.ca>
parents:
diff changeset
246 for (nn = n -> children; nn; nn = nn -> next_child)
c3099c5d9d3e Add very simple code generator
William Astle <lost@l-w.ca>
parents:
diff changeset
247 generate_code(nn, output);
c3099c5d9d3e Add very simple code generator
William Astle <lost@l-w.ca>
parents:
diff changeset
248 break;
c3099c5d9d3e Add very simple code generator
William Astle <lost@l-w.ca>
parents:
diff changeset
249 }
c3099c5d9d3e Add very simple code generator
William Astle <lost@l-w.ca>
parents:
diff changeset
250 }