Skip to content
Snippets Groups Projects
Normal view Permalink
assembly_gen.c 13.4 KiB
Newer Older
krf41037's avatar
Asm_gen first try  
krf41037 committed
1 
#include <stdio.h>
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
2
krf41037's avatar
Asm_gen first try  
krf41037 committed
3 4 5 6 7 8 9 10 11 12 13 14 15 

#include "mcc/tac.h"
#include "mcc/tac_print.h"
#include "mcc/symbol_table.h"


char *mcc_asm_gen(FILE *out, struct mcc_tac *tac)
{

    for(int i = 0; i < tac->tac_entries->size; i++)
    {
        struct mcc_tac_entry *entry = tac->tac_entries->arr[i];
        char *arg1 = entry->arg1;
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
16 
        //TODO calculate offset and save temp offset
krf41037's avatar
Asm_gen first try  
krf41037 committed
17 18 19 20 21 22 23 24 25 
        
        switch (entry->tac_op)
        {
        case MCC_TAC_FUNCTION_START:
            fprintf(out, "\t.globl %s\n", arg1);
			fprintf(out, "\t.type %s, @function\n", arg1);
			fprintf(out, "%s:\n", arg1);
			fprintf(out, "\tpushl\t%%ebp\n");
			fprintf(out, "\tmovl\t%%esp, %%ebp\n");
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
26 
            break;
krf41037's avatar
Asm_gen first try  
krf41037 committed
27 28 29 
        case MCC_TAC_CALL:
            fprintf(out, "\tcall\t%s\n", arg1);
            break;
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
30 31 32 33 34 35 36 37 38 

        // unary 
        case MCC_TAC_MINUS_INT_UN:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", offset);
	        fprintf(out, "\tnegl\t%%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", offset);
            break;
        case MCC_TAC_MINUS_FLOAT_UN:
            break;
krf41037's avatar
Asm_gen first try  
krf41037 committed
39 
        case MCC_TAC_NOT:
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
40 41 42 
            break;

        // binary
krf41037's avatar
Asm_gen first try  
krf41037 committed
43 
        case MCC_TAC_PLUS_INT:
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
44 45 46 
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\taddl\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
krf41037's avatar
Asm_gen first try  
krf41037 committed
47 48 
            break;
        case MCC_TAC_MINUS_INT_BIN:
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
49 50 51 
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tsubl\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
krf41037's avatar
Asm_gen first try  
krf41037 committed
52 53 
		    break;
        case MCC_TAC_MUL_INT:
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
54 55 56 57 58 59 60 61 62 63 
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\timull\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_DIV_INT:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tcltd\n");
		    fprintf(out, "\tidivl\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
krf41037's avatar
Asm_gen first try  
krf41037 committed
64 
        case MCC_TAC_PLUS_FLOAT:
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tfadds\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tfstps\t%d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_MINUS_FLOAT_BIN:
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tfsubs\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tfstps\t%d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_MUL_FLOAT:
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tfmuls\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tfstps\t%d(%%ebp)\n", result->offset);
		    break;
        case MCC_TAC_DIV_FLOAT:
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tfdivs\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tfstps\t%d(%%ebp)\n", result->offset);
		    break;
        case MCC_TAC_NOT_BOOL:
            fprintf(out, "\txorl\t$1, %%edx\n");
            break;
        case MCC_TAC_AND:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tandl\t%d(%%ebp), %%edx\n", arg2->offset);
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
		    break;
        case MCC_TAC_OR:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\torl\t%d(%%ebp), %%edx\n", arg2->offset);
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
		    break;
        case MCC_TAC_EQ:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tcmpl\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tsete\t%%al\n");
            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_NEQ:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tcmpl\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tsetne\t%%al\n");
            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_GT:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tcmpl\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tsetg\t%%al\n");
            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_LT:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tcmpl\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tsetl\t%%al\n");
            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_LTEQ:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tcmpl\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tsetle\t%%al\n");
            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_GTEQ:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tcmpl\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tsetge\t%%al\n");
            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_LT_FLOAT:
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tfcomip\t%%st(1), %%st\n");
            fprintf(out, "\tfstp\t%%st(0)\n");

            fprintf(out, "\tsetb\t%%al\n");

            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_LTEQ_FLOAT:
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tfcomip\t%%st(1), %%st\n");
            fprintf(out, "\tfstp\t%%st(0)\n");

            fprintf(out, "\tsetbe\t%%al\n");

            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_GT_FLOAT:
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tfcomip\t%%st(1), %%st\n");
            fprintf(out, "\tfstp\t%%st(0)\n");

            fprintf(out, "\tseta\t%%al\n");

            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_GTEQ_FLOAT:
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tfcomip\t%%st(1), %%st\n");
            fprintf(out, "\tfstp\t%%st(0)\n");

            fprintf(out, "\tsetae\t%%al\n");

            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
krf41037's avatar
Asm_gen first try  
krf41037 committed
182 
            break;
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 
        case MCC_TAC_EQ_FLOAT:
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tfcomip\t%%st(1), %%st\n");
            fprintf(out, "\tfstp\t%%st(0)\n");

            fprintf(out, "\tsete\t%%al\n");

            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_EQ_BOOL:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tcmpl\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tsete\t%%al\n");
            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_NEQ_FLOAT:
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg2->offset);
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tfcomip\t%%st(1), %%st\n");
            fprintf(out, "\tfstp\t%%st(0)\n");

            fprintf(out, "\tsetne\t%%al\n");

            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;
        case MCC_TAC_NEQ_BOOL:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tcmpl\t%d(%%ebp), %%eax\n", arg2->offset);
            fprintf(out, "\tsetne\t%%al\n");
            fprintf(out, "\tmovzbl\t%%al, %%eax\n");
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            break;

        // literal
krf41037's avatar
Asm_gen first try  
krf41037 committed
221 
        case MCC_TAC_BOOL_LITERAL:
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
222 223 224 
        //TODO parse arg1 to 0 or 1??
            int bool_value = (strcmp(arg1, "true") == 0) ? 1 : 0;
            fprintf(out, "\tmovl\t$%s, %d(%%ebp)\n",arg1, result->offset);
krf41037's avatar
Asm_gen first try  
krf41037 committed
225 226 
            break;
        case MCC_TAC_INT_LITERAL:
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
227 
            fprintf(out, "\tmovl\t$%s, %d(%%ebp)\n",arg1, result->offset);
krf41037's avatar
Asm_gen first try  
krf41037 committed
228 229 
            break;
        case MCC_TAC_STRING_LITERAL:
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
230 
            fprintf(out, "\tmovl\t$.LCONST%d, %d(%%ebp)\n", const_count,result->offset);
krf41037's avatar
Asm_gen first try  
krf41037 committed
231 232 
            break;
        case MCC_TAC_FLOAT_LITERAL:
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 
        //TODO create new constant
            fprintf(out, "\tflds\t.LCONST%d\n", const_count);
            fprintf(out, "\tfstps\t%d(%%ebp)\n", result->offset);
            break;
         
        // copy 
        case MCC_TAC_BOOL:
            break;
        case MCC_TAC_INT:
            break;
        case MCC_TAC_STRING:
            break;
        case MCC_TAC_FLOAT:
            break;

        // push 
        case MCC_TAC_PARAM_BOOL:
        case MCC_TAC_PARAM_INT:
        case MCC_TAC_PARAM_FLOAT:
        case MCC_TAC_PARAM_STRING:
            fprintf(out, "\tpushl\t%d(%%ebp)\n", arg1->offset);
            break;
        case MCC_TAC_PARAM_BOOL_ARR:
        case MCC_TAC_PARAM_INT_ARR:
        case MCC_TAC_PARAM_FLOAT_ARR:
        case MCC_TAC_PARAM_STRING_ARR:
            fprintf(out, "\tleal\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tpushl\t%%eax\n");
            break;

        // pop
        case MCC_TAC_PARAM_POP_BOOL:
        case MCC_TAC_PARAM_POP_INT:
        case MCC_TAC_PARAM_POP_FLOAT:
        case MCC_TAC_PARAM_POP_STRING:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", param_offset);
            fprintf(out, "\tmovl\t%%eax, %d(%%ebp)\n", result->offset);
            //increase param offset
            break;
        case MCC_TAC_PARAM_POP_BOOL_ARR:
        case MCC_TAC_PARAM_POP_INT_ARR:
        case MCC_TAC_PARAM_POP_FLOAT_ARR:
        case MCC_TAC_PARAM_POP_STRING_ARR:

            //increase param offset
            break;

        // load 
        case MCC_TAC_LOAD_BOOL:
        case MCC_TAC_LOAD_INT:
        case MCC_TAC_LOAD_STRING:
            fprintf(out, "\tmovl\t%d(%%ebp), %%edx\n", arg1->offset);
            fprintf(out, "\tmovl\t%d(%%ebp), %%ecx\n", arg2->offset);
            fprintf(out, "\tmovl\t0(%%ecx, %%edx, %d), %%eax\n", 4);
            break;
        case MCC_TAC_LOAD_FLOAT:
            fprintf(out, "\tmovl\t%d(%%ebp), %%edx\n", arg1->offset);
            fprintf(out, "\tmovl\t%d(%%ebp), %%ecx\n", arg2->offset);
            fprintf(out, "\tflds\t%d(%%ebp, %%edx, %d)\n", arg1->offset, 4);
            break;

        // store
        case MCC_TAC_STORE_BOOL:
        case MCC_TAC_STORE_INT:
        case MCC_TAC_STORE_STRING:
            fprintf(out, "\tmovl\t%d(%%ebp), %%eax\n", arg1->offset);
            fprintf(out, "\tmovl\t%d(%%ebp), %%edx\n", arg2->offset);
            fprintf(out, "\tmovl\t%d(%%ebp), %%ecx\n", offset);
            fprintf(out, "\tmovl\t%%eax, 0(%%ecx, %%edx, %d)\n", 4);
            break;
        
        case MCC_TAC_STORE_FLOAT:
            fprintf(out, "\tflds\t%d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tmovl\t%d(%%ebp), %%edx\n", arg2->offset);
            fprintf(out, "\tmovl\t%d(%%ebp), %%ecx\n", offset);
            fprintf(out, "\tfstps\t0(%%ecx, %%edx, %d)\n", 4);
            break;

         // IR operations
        case MCC_TAC_JMP :
            fprintf(out, "\tjmp\t.%s\n", result + sizeof(char));
            break;
        case MCC_TAC_JMP_FALSE :
            fprintf(out, "\tcmpl\t$0, %d(%%ebp)\n", arg1->offset);
            fprintf(out, "\tje\t.%s\n", result + sizeof(char));
            break;
        case MCC_TAC_RETURN :
            fprintf(out, "\tleave\n");
	        fprintf(out, "\tret\n");
            break;
        case MCC_TAC_ARR_DECL :
            // set stack offset size of pointer * elements
            break;
        case MCC_TAC_LABEL :
            fprintf(out, ".%s:\n", result + sizeof(char));
            break;
        case MCC_TAC_FUNCTION_END :
            fprintf(out, "\tleave\n");
	        fprintf(out, "\tret\n");
krf41037's avatar
Asm_gen first try  
krf41037 committed
332 
            break;
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
333 334 
    
        case MCC_TAC_UNKNOWN:
krf41037's avatar
Asm_gen first try  
krf41037 committed
335 336 337 338 
            break;
        }
    }
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
339 
    fprintf(out, "\n");
krf41037's avatar
Asm_gen first try  
krf41037 committed
340
krf41037's avatar
Assembly generation parsing from tac  
krf41037 committed
341 342 
    //TODO add constants
    //fprintf(out, ".LCONST%d:\n", i);
krf41037's avatar
Asm_gen first try  
krf41037 committed
343 344 

}