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

Instruction Details
A8.6.269 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.
Encoding T1 / A1 Advanced SIMD (F = 1 UNDEFINED in integer-only variants)
VABS. ,
VABS. ,
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1 1 1 1 1 1 1 1 1 D 1 1 size 0 1 Vd 0 F 1 1 0 Q M 0 Vm
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1 1 1 1 0 0 1 1 1 D 1 1 size 0 1 Vd 0 F 1 1 0 Q M 0 Vm
if size == ‘11’ || (F == ‘1’ && size != ‘10’) then UNDEFINED;
if Q == ‘1’ && (Vd == ‘1’ || Vm == ‘1’) then UNDEFINED;
advsimd = TRUE; floating_point = (F == ‘1’);
esize = 8