V{Q}ABS and V{Q}NEG

VABS (Vector Absolute) takes the absolute value of each element in a vector, and places the results in a second vector. (The floating-point version only clears the sign bit.)

VNEG (Vector Negate) negates each element in a vector, and places the results in a second vector. (The floating-point version only inverts the sign bit.)

Saturating versions of both instructions are available. The sticky QC flag (FPSCR bit[27]) is set if saturation occurs.

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V{Q}op{cond}.datatype Qd, Qm
V{Q}op{cond}.datatype Dd, Dm

where:

Q

if present, indicates that If any of the results overflow, they are saturated.

op

must be either ABS or NEG.

cond

is an optional condition code.

datatype

must be one of:

S8, S16, S32

for VABS, VNEG, VQABS, or VQNEG

F32

for VABS and VNEG only.

Qd, Qm

are the destination vector and the operand vector, for a quadword operation.

Dd, Dm

are the destination vector and the operand vector, for a doubleword operation.

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