#include "casl2.h"
#include "exec.h"
+/* 実行のエラー定義 */
+CERRARRAY cerr_exec[] = {
+ { 202, "SVC input - out of Input memory" },
+ { 203, "SVC output - out of COMET II memory" },
+ { 204, "Program Register (PR) - out of COMET II memory" },
+ { 205, "Stack Pointer (SP) - cannot allocate stack buffer" },
+ { 206, "Address - out of COMET II memory" },
+ { 207, "Stack Pointer (SP) - out of COMET II memory" },
+};
+
+bool addcerrlist_exec()
+{
+ return addcerrlist(ARRAYSIZE(cerr_exec), cerr_exec);
+}
+
+/* 実行モード: trace, logical, dump */
+EXECMODE execmode = {false, false, false};
+
/* 標準入力から文字データを読込(SVC 1) */
void svcin()
{
char *buffer = malloc(INSIZE + 1);
if(fgets(buffer, INSIZE, stdin) == NULL) {
- memory[GR[1]] = 0x0;
- memory[GR[2]] = 0x0;
+ memory[GR[1]] = memory[GR[2]] = 0x0;
return;
}
- for(i = 0; i < GR[1] && i < INSIZE; i++) {
+ for(i = 0; i < INSIZE; i++) {
if(*(buffer + i) == '\0' || *(buffer + i) == '\n') {
--i;
break;
setcerr(203, NULL); /* SVC output - out of Comet II memory */
return;
}
- if((w = memory[GR[1]+i]) == '\0') {
- break;
- }
/* 「文字の組」の符号表に記載された文字と、改行(CR)/タブを表示 */
/* それ以外の文字は、「.」で表す */
- if((w >= 0x20 && w <= 0x7E) || w == 0xA || w == '\t') {
+ if(((w = memory[GR[1]+i]) >= 0x20 && w <= 0x7E) || w == 0xA || w == '\t') {
putchar((char)w);
} else {
putchar('.');
/* 算術演算なので、第15ビットは送り出されない */
WORD sla(WORD val0, WORD val1)
{
- WORD sign, res, last;
+ WORD sign, res, last = 0x0;
int i;
FR = 0x0;
last = res & 0x4000;
res <<= 1;
}
- res = sign | res;
+ res = sign | (res & 0x7FFF);
/* OFに、レジスタから最後に送り出されたビットの値を設定 */
if(last > 0x0) {
FR += OF;
/* 空いたビット位置には符号と同じものが入る */
WORD sra(WORD val0, WORD val1)
{
- WORD sign, res, last;
+ WORD sign, res, last = 0x0;
int i;
FR = 0x0;
/* 論理左シフト。フラグを設定して値を返す */
WORD sll(WORD val0, WORD val1)
{
- WORD res = val0, last;
+ WORD res = val0, last = 0x0;
int i;
FR = 0x0;
/* 論理右シフト。フラグを設定して値を返す */
WORD srl(WORD val0, WORD val1)
{
- WORD res = val0, last;
+ WORD res = val0, last = 0x0;
int i;
FR = 0x0;
return res;
}
-/* COMET II仮想マシンのリセット */
-void reset()
-{
- int i;
- for(i = 0; i < REGSIZE; i++) {
- GR[i] = 0x0;
- }
- SP = PR = FR = 0x0;
- memory = malloc(memsize);
- for(i = 0; i < memsize; i++) {
- memory[i] = 0x0;
- }
-}
-
-/* コードの実行 */
+/* 仮想マシンCOMET IIでの実行 */
void exec()
{
WORD op, r_r1, x_r2, val;
CMDTYPE cmdtype;
- char *errpr = malloc(8);
+ char *errpr = malloc(CERRSTRSIZE + 1);
clock_t clock_begin, clock_end;
- if((&execmode)->tracemode) {
+ addcerrlist_exec();
+ if(execmode.trace) {
fprintf(stdout, "\nExecuting machine codes\n");
}
/* フラグレジスタの初期値設定 */
sprintf(errpr, "PR:#%04X", PR);
setcerr(205, errpr); /* Stack Pointer (SP) - cannot allocate stack buffer */
}
+ /* 命令の取り出し */
op = memory[PR] & 0xFF00;
+ /* 命令の解読 */
cmdtype = getcmdtype(op);
r_r1 = (memory[PR] >> 4) & 0xF;
x_r2 = memory[PR] & 0xF;
if(cerrno > 0) {
goto execerr;
}
- if((&execmode)->tracemode){
+ /* traceオプション指定時、レジスタを出力 */
+ if(execmode.trace){
fprintf(stdout, "#%04X: Register::::\n", PR);
dspregister();
}
- if((&execmode)->dumpmode){
+ /* dumpオプション指定時、メモリを出力 */
+ if(execmode.dump){
fprintf(stdout, "#%04X: Memory::::\n", PR);
dumpmemory();
}
- if((&execmode)->dumpmode || (&execmode)->tracemode) {
+ /* どちらかのオプション指定時、改行を出力 */
+ if(execmode.dump || execmode.trace) {
fprintf(stdout, "\n");
}
PR++;
- /* å\87¦ç\90\86対象ã\81®å\80¤ã\82\92å\8f\96å¾\97 */
+ /* ã\82ªã\83\9aã\83©ã\83³ã\83\89ã\81®å\8f\96ã\82\8aå\87ºã\81\97 */
if(cmdtype == R1_R2) {
assert(x_r2 < REGSIZE);
val = GR[x_r2];
}
else if(cmdtype == R_ADR_X || cmdtype == R_ADR_X_ || cmdtype == ADR_X) {
+ assert(x_r2 < REGSIZE);
/* 実効アドレス(値または値が示す番地)を取得 */
val = memory[PR++];
/* 指標アドレスを加算 */
if(op >= 0x1000 && op <= 0x4FFF) {
op &= 0xFB00;
}
- /* å\91½ä»¤ã\81\94ã\81¨ã\81®å\87¦ç\90\86ã\82\92実行 */
+ /* å\91½ä»¤ã\81®実行 */
switch(op)
{
- case 0x0: /* NOP */
+ case 0x0: /* NOP */
break;
case 0x1000: /* LD */
setfr(GR[r_r1] = val);
case 0x1200: /* LAD */
GR[r_r1] = val;
break;
- case 0x2000: /* ADDA */
+ case 0x2000: /* ADDA */
GR[r_r1] = adda(GR[r_r1], val);
break;
- case 0x2100: /* SUBA */
+ case 0x2100: /* SUBA */
GR[r_r1] = suba(GR[r_r1], val);
break;
- case 0x2200: /* ADDL */
+ case 0x2200: /* ADDL */
GR[r_r1] = addl(GR[r_r1], val);
break;
- case 0x2300: /* SUBL */
+ case 0x2300: /* SUBL */
GR[r_r1] = subl(GR[r_r1], val);
break;
- case 0x3000: /* AND */
+ case 0x3000: /* AND */
setfr(GR[r_r1] &= val);
break;
- case 0x3100: /* OR */
+ case 0x3100: /* OR */
setfr(GR[r_r1] |= val);
break;
- case 0x3200: /* XOR */
+ case 0x3200: /* XOR */
setfr(GR[r_r1] ^= val);
break;
- case 0x4000: /* CPA */
+ case 0x4000: /* CPA */
cpa(GR[r_r1], val);
break;
- case 0x4100: /* CPL */
+ case 0x4100: /* CPL */
cpl(GR[r_r1], val);
break;
- case 0x5000: /* SLA */
+ case 0x5000: /* SLA */
GR[r_r1] = sla(GR[r_r1], val);
break;
- case 0x5100: /* SRA */
+ case 0x5100: /* SRA */
GR[r_r1] = sra(GR[r_r1], val);
break;
- case 0x5200: /* SLL */
+ case 0x5200: /* SLL */
GR[r_r1] = sll(GR[r_r1], val);
break;
- case 0x5300: /* SRL */
+ case 0x5300: /* SRL */
GR[r_r1] = srl(GR[r_r1], val);
break;
- case 0x6100: /* JMI */
+ case 0x6100: /* JMI */
if((FR & SF) > 0) {
PR = val;
}
break;
- case 0x6200: /* JNZ */
+ case 0x6200: /* JNZ */
if((FR & ZF) == 0) {
PR = val;
}
break;
- case 0x6300: /* JZE */
+ case 0x6300: /* JZE */
if((FR & ZF) > 0) {
PR = val;
}
break;
- case 0x6400: /* JUMP */
+ case 0x6400: /* JUMP */
PR = val;
break;
- case 0x6500: /* JPL */
+ case 0x6500: /* JPL */
if((FR & (SF | ZF)) == 0) {
PR = val;
}
break;
- case 0x6600: /* JOV */
+ case 0x6600: /* JOV */
if((FR & OF) > 0) {
PR = val;
}
break;
- case 0x7000: /* PUSH */
+ case 0x7000: /* PUSH */
assert(SP > endptr && SP <= memsize);
memory[--SP] = val;
break;
- case 0x7100: /* POP */
+ case 0x7100: /* POP */
assert(SP > endptr && SP <= memsize);
GR[r_r1] = memory[SP++];
break;
- case 0x8000: /* CALL */
+ case 0x8000: /* CALL */
assert(SP > endptr && SP <= memsize);
memory[--SP] = PR;
PR = val;
break;
- case 0x8100: /* RET */
+ case 0x8100: /* RET */
assert(SP > endptr && SP <= memsize);
if(SP == memsize) {
return;
PR = memory[SP++];
break;
}
- case 0xf000: /* SVC */
+ case 0xF000: /* SVC */
switch(val)
{
case 0x0: /* EXIT */
do {
clock_end = clock();
} while(clock_end - clock_begin < CLOCKS_PER_SEC / clocks);
-/* printf("PR:%04X; time: %f\n", PR, (double)((clock_end - clock_begin) * CLOCKS_PER_SEC)); */
+ #if 0
+ printf("PR:%04X; time: %f\n", PR, (double)((clock_end - clock_begin) * CLOCKS_PER_SEC));
+ #endif
}
execerr:
fprintf(stderr, "Execute error - %d: %s\n", cerrno, cerrmsg);