| Copying data |
|
src is an address, register, or literal |
|
|
dst is an address or register |
movb |
src, dst |
1 byte |
movl |
src, dst |
up to 4 bytes |
movsbl |
src, dst |
src is 1 signed byte, dst is 4 bytes |
movzbl |
src, dst |
src is 1 unsigned byte, dst is 4 bytes |
movq |
src, dst |
8 bytes |
|
|
|
| Binary operators |
|
a is an address, register, or literal |
|
|
b is a register |
|
|
c is a literal |
addl |
a, b |
b = b + a, up to 4 bytes |
addq |
a, b |
b = b + a, 8 bytes |
subl |
a, b |
b = b - a, up to 4 bytes |
subq |
a, b |
b = b - a, 8 bytes |
imull |
a, b |
b = b ×
a, up to 4 bytes |
imull |
c, a, b |
b = a ×
c, up to 4 bytes |
imulq |
a, b |
b = b ×
a, 8 bytes |
imulq |
c, a, b |
b = a ×
c, 8 bytes |
xorl |
a, b |
b = b ^ a |
|
|
|
| Bit shifting |
|
a is an address, register, or literal |
|
|
b is a register |
shll |
a, b |
b = b << a |
sarl |
a, b |
b = b >> a |
|
|
|
| Compare and Branch |
|
x and y are addresses, registers, or literals |
|
|
z is an address or label |
cmpb |
x, y |
eax = 1 if x == y, 0 otherwise, 1 byte |
cmpl |
x, y |
eax = 1 if x == y, 0 otherwise, up to 4 bytes |
cmpq |
x, y |
eax = 1 if x == y, 0 otherwise, 8 bytes |
je |
z |
rip = z if eax == 0 |
jne |
z |
rip = z if eax != 0 |
jmp |
z |
rip = z |
|
|
|
| Calling functions |
|
a is an address or label |
|
|
b is an 8 byte register |
|
|
z is an address or label |
leaq |
a, b |
b = address of a |
callq |
z |
rip = z, new frame created |