Enum yaxpeax_lc87::Operand [−][src]
pub enum Operand {
Nothing,
BranchAbsU17 {
addr: u32,
},
BranchRelU12 {
rel: u16,
},
ImmU8 {
imm: u8,
},
ImmU16 {
imm: u16,
},
AbsU16 {
addr: u16,
},
BitIndex {
index: u8,
},
IndirectReg {
n: u8,
},
IndirectRegPlusC {
n: u8,
},
R0Offset {
off: i8,
},
}Expand description
an operand for an lc87 instruction.
Variants
no operand in this position.
reaching this as a user of yaxpeax_lc87 is almost certainly a bug. Instruction::operand
will return None rather than Operand::Nothing.
branch to the absolute address addr.
branch to the relative address rel (PC + inst.len() + rel).
an 8-bit immediate.
the meaning of this immediate is opcode-dependent, but usually a value used for a bitwise or arithmetic operation.
a 16-bit immediate.
this is only used for the wide mov that loads both A and B registers at once. A
gets the low byte, B gets the high byte.
a memory access to an absolute 16-bit address.
an address of a bit in some byte.
this is coupled with some memory operand which specifies the byte in question. the usage of the bit selected by address/bit varies by opcode.
a memory access to the address specified by indirect register Rn.
n may only be in the range [0, 63], inclusive. indirect registers are pairs of bytes n * 2 and n * 2 + 1 from zero. for example, indirect register 5 would select the address
formed by the word at memory 0x0a and 0x0b.
a memory access to the address specified by indirect register Rn plus signed displacement
from register C.
n may only be in the range [0, 63], inclusive. indirect registers are pairs of bytes n * 2 and n * 2 + 1 from zero. for example, indirect register 5 would select the address
formed by the word at memory 0x0a and 0x0b.
a memory access to the address specified by indirect register R0 plus the signed offset
off.
off may only be in the range [-64, 64], inclusive.