-#include <stdio.h>
-#include <assert.h>
-#include <time.h>
-
#include "exec.h"
-#include "cerr.h"
/**
* @brief プログラムレジスタ(PR)を表すWORD値を文字列に変換
*/
WORD get_val_adr_x(WORD adr, WORD oprx);
+/**
+ * @brief 汎用レジスタの番号からレジスタを表す文字列を返す
+ *
+ * @return 汎用レジスタを表す文字列。「GR0」「GR1」・・・「GR7」のいずれか
+ *
+ * @param word レジスタ番号[0-7]を表すWORD値
+ */
+char *grstr(WORD word);
+
+
/**
* @brief 実行エラーの定義
*/
};
/**
- * @brief 実行モード: trace, logical, dump
+ * @brief 実行モード: trace, logical, dump, step
*/
-EXECMODE execmode = {false, false, false};
+EXECMODE execmode = {false, false, false, false};
char *pr2str(WORD pr)
{
void svcin()
{
int i;
- char *buffer = malloc_chk(INSIZE + 1, "svcin.buffer");
+ char *buf = malloc_chk(INSIZE + 1, "svcin.buf");
- if(fgets(buffer, INSIZE, stdin) == NULL) {
+ if(fgets(buf, INSIZE, stdin) == NULL) {
sys->memory[sys->cpu->gr[1]] = sys->memory[sys->cpu->gr[2]] = 0x0;
return;
}
for(i = 0; i < INSIZE; i++) {
- if(*(buffer + i) == '\0' || *(buffer + i) == '\n') {
+ if(*(buf + i) == '\0' || *(buf + i) == '\n') {
--i;
break;
}
setcerr(208, ""); /* SVC input - memory overflow */
break;
}
- sys->memory[sys->cpu->gr[1]+i] = *(buffer + i);
+ sys->memory[sys->cpu->gr[1]+i] = *(buf + i);
}
sys->memory[sys->cpu->gr[2]] = i + 1;
- FREE(buffer);
+ FREE(buf);
}
void svcout()
sys->cpu->pr += 1;
}
-void addl_subl_flagset(long val)
+void addl_gr(WORD r, WORD val, bool add)
{
- sys->cpu->fr = 0x0;
+ unsigned long o, s;
- if(val > 65535) {
- sys->cpu->fr += OF;
- }
- if(((WORD)(val) & 0x8000) == 0x8000) {
- sys->cpu->fr += SF;
- } else if(val == 0x0) {
- sys->cpu->fr += ZF;
- }
-}
+ o = sys->cpu->gr[r];
+ sys->cpu->fr = 0x0; /* flag initialize */
-void addl(WORD r, WORD val)
-{
- long s;
-
- s = sys->cpu->gr[r] + val;
+ if(add == true) {
+ s = o + val;
+ if(s > 0xFFFF) {
+ sys->cpu->fr += OF;
+ }
+ } else {
+ if(o < val) {
+ sys->cpu->fr += OF;
+ }
+ s = o + (~val + 1);
+ if(s > 0xFFFF) {
+ s &= 0xFFFF;
+ }
+ }
sys->cpu->gr[r] = (WORD)s;
- addl_subl_flagset(s);
-}
-void subl(WORD r, WORD val)
-{
- long s;
-
- if((s = sys->cpu->gr[r] + (~val + 1)) > 0x10000) {
- s -= 0x10000;
+ if((s & 0x8000) == 0x8000) {
+ sys->cpu->fr += SF;
}
- sys->cpu->gr[r] = (WORD)s;
- addl_subl_flagset(s);
- if(r < val) {
- sys->cpu->fr += OF;
+ else if(s == 0x0) {
+ sys->cpu->fr += ZF;
}
}
WORD w[2];
w[0] = sys->memory[sys->cpu->pr];
w[1] = sys->memory[sys->cpu->pr + 1];
- addl(get_r_r1(w[0]), get_val_adr_x(w[1], w[0]));
+ addl_gr(get_r_r1(w[0]), get_val_adr_x(w[1], w[0]), true);
sys->cpu->pr += 2;
}
{
WORD w[1];
w[0] = sys->memory[sys->cpu->pr];
- addl(get_r_r1(w[0]), sys->cpu->gr[get_x_r2(w[0])]);
+ addl_gr(get_r_r1(w[0]), sys->cpu->gr[get_x_r2(w[0])], true);
sys->cpu->pr += 1;
}
WORD w[2];
w[0] = sys->memory[sys->cpu->pr];
w[1] = sys->memory[sys->cpu->pr + 1];
- subl(get_r_r1(w[0]), (get_val_adr_x(w[1], w[0])));
+ addl_gr(get_r_r1(w[0]), get_val_adr_x(w[1], w[0]), false);
sys->cpu->pr += 2;
}
{
WORD w[1];
w[0] = sys->memory[sys->cpu->pr];
- subl(get_r_r1(w[0]), (sys->cpu->gr[get_x_r2(w[0])]));
+ addl_gr(get_r_r1(w[0]), sys->cpu->gr[get_x_r2(w[0])], false);
sys->cpu->pr += 1;
}
sys->cpu->pr += 2;
}
+char *grstr(WORD word)
+{
+ assert(word <= 7);
+ char *str = malloc_chk(3 + 1, "grstr.str");
+ sprintf(str, "GR%d", word);
+ return str;
+}
+
void exec()
{
clock_t clock_begin, clock_end;
}
if(execmode.dump) { /* dumpオプション指定時、メモリを出力 */
fprintf(stdout, "#%04X: Memory::::\n", sys->cpu->pr);
- dumpmemory();
+ dumpmemory(0x0, 0xFFFF);
}
fprintf(stdout, "\n");
}
+ /* デバッガーモードの場合、デバッガーを起動 */
+ if(execmode.step == true || getbps(sys->cpu->pr) == true) {
+ monitor();
+ }
/* プログラムレジスタをチェック */
if(sys->cpu->pr >= sys->memsize) {
setcerr(201, s = pr2str(sys->cpu->pr)); /* Program Register (PR) - memory overflow */
} while(clock_end - clock_begin < CLOCKS_PER_SEC / sys->clocks);
}
execfin:
+ freebps();
free_code_cmdtype(); /* 命令のコードとタイプがキーのハッシュ表を解放 */
if(cerr->num > 0) {
fprintf(stderr, "Execute error - %d: %s\n", cerr->num, cerr->msg);
}
}
+
+bool disassemble_file(const char *file)
+{
+ bool stat = true;
+ FILE *fp;
+ WORD i = 0, w, cmd, x, adr;
+ CMDTYPE cmdtype = 0;
+ char *cmdname, *g, *g1, *g2;
+
+ assert(file != NULL);
+ if((fp = fopen(file, "rb")) == NULL) {
+ perror(file);
+ return false;
+ }
+
+ create_code_cmdtype(); /* 命令のコードとタイプがキーのハッシュ表を作成 */
+
+ fprintf(stdout, "MAIN\tSTART\n");
+ for(; ;) {
+ fread(&w, sizeof(WORD), 1, fp);
+ if(feof(fp)) {
+ break;
+ }
+ cmd = w & 0xFF00;
+ cmdname = getcmdname(cmd);
+ cmdtype = getcmdtype(cmd);
+ if(cmd == 0xFF00 || (w != 0 && cmd == 0x0000)) {
+ fprintf(stdout, "\tDC\t%d\t\t\t\t; #%04X: #%04X :: ", w, i++, w);
+ print_dumpword(w, true);
+ } else if(cmdtype == R_ADR_X || cmdtype == ADR_X) {
+ fread(&adr, sizeof(WORD), 1, fp);
+ fprintf(stdout, "\t%s\t", cmdname);
+ if(cmdtype == R_ADR_X) {
+ g = grstr((w & 0x00F0) >> 4);
+ fprintf(stdout, "%s,", g);
+ FREE(g);
+ }
+ fprintf(stdout, "#%04X", adr);
+ if((x = w & 0x000F) != 0) {
+ fprintf(stdout, ",%s", g = grstr(x));
+ FREE(g);
+ }
+ fprintf(stdout, "\t\t\t\t; #%04X: #%04X #%04X", i, w, adr);
+ i += 2;
+ } else {
+ fprintf(stdout, "\t%s", cmdname);
+ if(cmdtype == R1_R2) {
+ g1 = grstr((w & 0x00F0) >> 4);
+ g2 = grstr(w & 0x000F);
+ fprintf(stdout, "\t%s,%s", g1, g2);
+ FREE(g1);
+ FREE(g2);
+ } else if(cmdtype == R_) {
+ g = grstr((w & 0x00F0) >> 4);
+ fprintf(stdout, "\t%s", g);
+ FREE(g);
+ }
+ fprintf(stdout, "\t\t\t\t; #%04X: #%04X", i++, w);
+ }
+ fprintf(stdout, "\n");
+ }
+ fprintf(stdout, "\tEND\n");
+ free_code_cmdtype();
+ fclose(fp);
+ return stat;
+}