BufferOffset Assembler::Logical(const Register& rd, const Register& rn,
const Operand& operand, LogicalOp op)
{
VIXL_ASSERT(rd.size() == rn.size());
if (operand.IsImmediate()) {
int64_t immediate = operand.immediate();
unsigned reg_size = rd.size();
VIXL_ASSERT(immediate != 0);
VIXL_ASSERT(immediate != -1);
VIXL_ASSERT(rd.Is64Bits() || is_uint32(immediate));
// If the operation is NOT, invert the operation and immediate.
if ((op & NOT) == NOT) {
op = static_cast<LogicalOp>(op & ~NOT);
immediate = rd.Is64Bits() ? ~immediate : (~immediate & kWRegMask);
}
unsigned n, imm_s, imm_r;
if (IsImmLogical(immediate, reg_size, &n, &imm_s, &imm_r)) {
// Immediate can be encoded in the instruction.
return LogicalImmediate(rd, rn, n, imm_s, imm_r, op);
} else {
// This case is handled in the macro assembler.
VIXL_UNREACHABLE();
}
} else {
VIXL_ASSERT(operand.IsShiftedRegister());
VIXL_ASSERT(operand.reg().size() == rd.size());
Instr dp_op = static_cast<Instr>(op | LogicalShiftedFixed);
return DataProcShiftedRegister(rd, rn, operand, LeaveFlags, dp_op);
}
}
BufferOffset Assembler::DataProcShiftedRegister(const Register& rd, const Register& rn,
const Operand& operand, FlagsUpdate S, Instr op)
{
VIXL_ASSERT(operand.IsShiftedRegister());
VIXL_ASSERT(rn.Is64Bits() || (rn.Is32Bits() && is_uint5(operand.shift_amount())));
return Emit(SF(rd) | op | Flags(S) |
ShiftDP(operand.shift()) | ImmDPShift(operand.shift_amount()) |
Rm(operand.reg()) | Rn(rn) | Rd(rd));
}
void Assembler::adr(const Register& rd, int imm21) {
VIXL_ASSERT(rd.Is64Bits());
EmitBranch(ADR | ImmPCRelAddress(imm21) | Rd(rd));
}
void Assembler::adrp(Instruction* at, const Register& rd, int imm21) {
VIXL_ASSERT(rd.Is64Bits());
EmitBranch(at, ADRP | ImmPCRelAddress(imm21) | Rd(rd));
}
void Assembler::tbnz(Instruction* at, const Register& rt, unsigned bit_pos, int imm14) {
VIXL_ASSERT(rt.Is64Bits() || (rt.Is32Bits() && (bit_pos < kWRegSize)));
EmitBranch(at, TBNZ | ImmTestBranchBit(bit_pos) | ImmTestBranch(imm14) | Rt(rt));
}