Arm® A64 Instruction Set Architecture: Future Architecture Technologies in the A architecture profile

SQABS

Signed saturating absolute value.

Compute the absolute value of the signed integer in each active element of the source vector, and place the results in the corresponding elements of the destination vector. Each result element is saturated to the N-bit element's signed integer range -2^(N-1) to (2^(N-1) )-1. Inactive elements in the destination vector register remain unmodified.

if !HaveSVE2() then UNDEFINED;
integer esize = 8 << UInt(size);
integer g = UInt(Pg);
integer n = UInt(Zn);
integer d = UInt(Zd);

Assembler Symbols

CheckSVEEnabled();
integer elements = VL DIV esize;
bits(PL) mask = P[g];
bits(VL) operand  = Z[n];
bits(VL) result = Z[d];

for e = 0 to elements-1
    integer element = SInt(Elem[operand, e, esize]);
    if ElemP[mask, e, esize] == '1' then
        element = Abs(element);
        Elem[result, e, esize] = SignedSat(element, esize);

Z[d] = result;