ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition

Assembler syntax
SMLALD{X} , , ,
where:
X If X is present, the multiplications are bottom × top and top × bottom.
If the X is omitted, the multiplications are bottom × bottom and top × top.
See Standard assembler syntax fields on page A8-7.
Instruction Details
Supplies the lower 32 bits of the accumulate value, and is the destination register for the
lower 32 bits of the result.
Supplies the upper 32 bits of the accumulate value, and is the destination register for the
upper 32 bits of the result.
The first operand register.
The second operand register.
Operation
if ConditionPassed() then
EncodingSpecificOperations();
operand2 = if m_swap then ROR(R[m],16) else R[m];
product1 = SInt(R[n]) * SInt(operand2);
product2 = SInt(R[n]) * SInt(operand2);
result = product1 + product2 + SInt(R[dHi]:R[dLo]);
R[dHi] = result;
R[dLo] = result;
Exceptions
None.
ARM DDI 0406B Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. A8-339