Computer Architecture Lab/Winter2006/HoeftPirkWeirHuang/InstructionSetII

Instruction Set

edit
Instruction Fixed Opcode Variable Opcode Semantics Affected flags
3 operands 0 instructions unused
Add 0000 ddddrrrraaaa D = R + A CZON
Adc 0001 ddddrrrraaaa D = R + A + c CZON
Sub 0010 ddddrrrraaaa D = R - A CZON
Sbc 0011 ddddrrrraaaa D = R - A - c CZON
CMPI 0100 rrrriiiiiiii R - I CZON
And 0101 ddddrrrraaaa D = R & A
Or 0110 ddddrrrraaaa D = R or A
Xor 0111 ddddrrrraaaa D = R ^ A
LDB0 1000 rrrriiiiiiii R[0] = I; R[1] = 0; R[2] = 0; R[3] = 0;
LDB1 1001 rrrriiiiiiii R[1] = I; R[2] = 0; R[3] = 0;
LDB2 1010 rrrriiiiiiii R[2] = I; R[3] = 0;
LDB3 1011 rrrriiiiiiii R[3] = I;
RJMP 1100 iiiiiiiiiiii PC = I
BRNE 11010 iiiiiiiiiii
BREQ 11011 iiiiiiiiiii
BRCC 11100 iiiiiiiiiii
BRCS 11101 iiiiiiiiiii
2 operands 0 instructions unused
ADDI 11110000 rrrriiii R = R + I CZON
ADCI 11110001 rrrriiii R = R + I + c CZON
SUBI 11110010 rrrriiii R = R - I CZON
SBCI 11110011 rrrriiii R = R - I - c CZON
CMP 11110100 rrrrcccc R - C CZON
LSR 11110101 rrrrssss R >>= S C
LSL 11110110 rrrrssss R <<= S C
ASR 11110111 rrrrssss R >>>= S
ROR 11111000 rrrrssss R = R ROR S C
ROL 11111001 rrrrssss R = R ROL S
MOV 11111010 ddddssss D = S
LD 11111011 ddddaaaa D = [A]
ST 11111100 ddddaaaa [A] = D
LSRI 11111101 rrrriiii R = R >> i
LSLI 11111110 rrrriiii R = R << i
1 operand 9 instructions unused
JMP 111111110000 rrrr PC = R
CALL 111111110001 rrrr PC => [SP]; SP--; PC = R
PUSH 111111110010 rrrr R => [SP]; SP--
POP 111111110011 rrrr SP++; [SP] => R;
NEG 111111110100 rrrr R = -R
COM 111111110101 rrrr R = ¬R
PAR 111111110110 rrrr C = 1s in R
0 operands 3 instructions unused
RET 1111111111110000 SP++; [SP] => PC
RETI 1111111111110001
CLI 1111111111110010 Interrupt flag = 0
SEI 1111111111110011 Interrupt flag = 1
SKIPCC 1111111111110100
SKIPCS 1111111111110101
SKIPNE 1111111111110110
SKIPEQ 1111111111110111
SKIPNO 1111111111111000
SKIPOV 1111111111111001
SKIPNOTNEG 1111111111111010
SKIPNEG 1111111111111011
1111111111111100
1111111111111101
1111111111111110
NOP 1111111111111111