Arm® A64 Instruction Set Architecture: Armv8, for Armv8-A architecture profile

UZP1, UZP2 (predicates)

Concatenate even or odd elements from two predicates.

Concatenate adjacent even or odd-numbered elements from the first and second source predicates and place in elements of the destination predicate. This instruction is unpredicated.

It has encodings from 2 classes: Even and Odd

Even

if !HaveSVE() then UNDEFINED;
integer esize = 8 << UInt(size);
integer n = UInt(Pn);
integer m = UInt(Pm);
integer d = UInt(Pd);
integer part = 0;

Odd

if !HaveSVE() then UNDEFINED;
integer esize = 8 << UInt(size);
integer n = UInt(Pn);
integer m = UInt(Pm);
integer d = UInt(Pd);
integer part = 1;

Assembler Symbols

CheckSVEEnabled();
integer elements = VL DIV esize;
bits(PL) operand1 = P[n];
bits(PL) operand2 = P[m];
bits(PL) result;

bits(PL*2) zipped = operand2:operand1;
for e = 0 to elements-1
    Elem[result, e, esize DIV 8] = Elem[zipped, 2*e+part, esize DIV 8];

P[d] = result;