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95 lines
1.6 KiB
C
95 lines
1.6 KiB
C
#include <stdio.h>
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#include <stdint.h>
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int check_registers(int a, int b, int max_reg);
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int main() {
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int max_reg = 4;
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int zf = 0, to_exec = 1;
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#ifdef REGISTERS
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max_reg = REGISTERS;
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#endif
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/* A, B, C, D. Indice - 5 */
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uint8_t reg[4] = {0, 0, 0, 0};
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int i;
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uint8_t a, b;
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uint8_t x;
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while (1) {;
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scanf("%hhu", &x);
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#ifdef _DEBUG
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printf("x:%hhu\n", x);
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#endif
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if ((x & (1 << 7)) && !zf) {
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to_exec = 0;
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//zf = 0;
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}
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x &= 0x7F;
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#ifdef _DEBUG
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printf("zf:%d, to_exec:%d\n", zf, to_exec);
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#endif
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if (to_exec == 0) {
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if ((x >= 1) && (x <= 3))
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scanf("%hhu %hhu\n", &a, &b);
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to_exec = 1;
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zf = 0;
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continue;
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}
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switch (x) {
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case 0:
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return 0;
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break;
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case 1:
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scanf("%hhu %hhu\n", &a, &b);
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if (check_registers(a, b, max_reg)) {
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printf("-1\n");
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return 0;
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}
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reg[a-5] += reg[b-5];
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if (reg[a-5] == 0)
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zf = 1;
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else
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zf = 0;
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break;
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case 2:
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scanf("%hhu %hhu\n", &a, &b);
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if(check_registers(a, b, max_reg)) {
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printf("-1\n");
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return 0;
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}
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reg[a-5] -= reg[b-5];
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if (reg[a-5] == 0)
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zf = 1;
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else
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zf = 0;
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break;
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case 3:
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scanf("%hhu %hhu\n", &a, &b);
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if(check_registers(a, 0, max_reg)) {
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printf("-1\n");
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return 0;
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}
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reg[a-5] = b;
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if (reg[a-5] == 0)
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zf = 1;
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else
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zf = 0;
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break;
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case 4:
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for (i = 0; i < max_reg; ++i)
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printf("%hhu ", reg[i]);
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putchar('\n');
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break;
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}
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to_exec = 1;
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}
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}
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int check_registers(int a, int b, int max_reg) {
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a -= 5;
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b -= 5;
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if ((a >= max_reg) || (b >= max_reg))
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return 1;
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return 0;
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}
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