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move /src/as to /as and /src to /vm

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Henrik Hautakoski 2018-12-18 13:29:18 +01:00
parent 8ef4c7edcd
commit d73e2ab710
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GPG key ID: 839F3A7EAFAEAFAA
25 changed files with 6 additions and 6 deletions
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as/codegen.c Normal file
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/* codegen.c
*
* Copyright (C) 2018 Henrik Hautakoski <henrik@fiktivkod.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include "codegen.h"
void codegen_emit(struct ast_instr* instr, symtab_t* symbols, uint8_t* out) {
out[0] = instr->opcode << 4;
if (instr->n_operands < 1)
// No operands, return
return;
// J-Type
if (instr->operands[0].type == DATATYPE_STRING) {
uint16_t addr;
if (symtab_get(symbols, instr->operands[0].s, &addr) >= 0) {
out[0] |= (addr >> 8);
out[1] = addr;
}
}
// R/RI or I
else if (instr->operands[0].type == DATATYPE_REGISTER) {
out[0] |= instr->operands[0].r & 0xF;
// I
if (instr->operands[1].type == DATATYPE_NUMBER) {
out[1] = instr->operands[1].n;
}
// R/RI-Type
else if (instr->operands[1].type == DATATYPE_REGISTER &&
(instr->operands[2].type == DATATYPE_REGISTER || instr->operands[2].type == DATATYPE_NUMBER)) {
out[1] = (instr->operands[1].r << 4) | (instr->operands[2].r & 0xF);
}
}
}