VQDMULL, VQDMLAL, and VQDMLSL (by vector or by scalar)

Vector Saturating Doubling Multiply instructions multiply their operands and double the results. VQDMULL places the results in the destination register. VQDMLAL adds the results to the values in the destination register. VQDMLSL subtracts the results from the values in the destination register.

If any of the results overflow, they are saturated. The sticky QC flag (FPSCR bit[27]) is set if saturation occurs.

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VQDopL{cond}.datatype Qd, Dn, Dm
VQDopL{cond}.datatype Qd, Dn, Dm[x]

where:

op

must be one of:

MUL

Multiply

MLA

Multiply Accumulate

MLS

Multiply Subtract.

cond

is an optional condition code.

datatype

must be either S16 or S32.

Qd, Dn

are the destination vector and the first operand vector.

Dm

is the vector holding the second operand, for a by vector operation.

Dm[x]

is the scalar holding the second operand, for a by scalar operation.

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Reference
Copyright © 2010-2011 ARM. All rights reserved.ARM DUI 0489F
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