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

Instruction Details
A8.6.284 VCGT (register)
VCGT (Vector Compare Greater Than) takes each element in a vector, and compares it with the corresponding
element of a second vector. If the first is greater than the second, the corresponding element in the
destination vector is set to all ones. Otherwise, it is set to all zeros.
The operand vector elements can be any one of:
8-bit, 16-bit, or 32-bit signed integers
8-bit, 16-bit, or 32-bit unsigned integers
32-bit floating-point numbers.
The result vector elements are bitfields the same size as the operand vector elements.
Encoding T1 / A1 Advanced SIMD
VCGT. , , an integer type
VCGT. , , an integer type
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 U 1 1 1 1 0 D size Vn Vd 0 0 1 1 N 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 U 0 D size Vn Vd 0 0 1 1 N Q M 0 Vm
if Q == ‘1’ && (Vd == ‘1’ || Vn == ‘1’ || Vm == ‘1’) then UNDEFINED;
if size == ‘11’ then UNDEFINED;
type = if U == ‘1’ then VCGTtype_unsigned else VCGTtype_signed;
esize = 8