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SABA

Signed absolute difference and accumulate.

Compute the absolute difference between signed integer values in elements of the second source vector and corresponding elements of the first source vector, and add the difference to the corresponding elements of the destination vector. This instruction is unpredicated.

313029282726252423222120191817161514131211109876543210
01000101size0Zm111110ZnZda

SVE2

SABA <Zda>.<T>, <Zn>.<T>, <Zm>.<T>

if !HaveSVE2() then UNDEFINED;
integer esize = 8 << UInt(size);
integer n = UInt(Zn);
integer m = UInt(Zm);
integer da = UInt(Zda);
boolean unsigned = FALSE;

Assembler Symbols

<Zda>

Is the name of the third source and destination scalable vector register, encoded in the "Zda" field.

<T> Is the size specifier, encoded in size:
size <T>
00 B
01 H
10 S
11 D
<Zn>

Is the name of the first source scalable vector register, encoded in the "Zn" field.

<Zm>

Is the name of the second source scalable vector register, encoded in the "Zm" field.

Operation

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

for e = 0 to elements-1
    integer element1 = Int(Elem[operand1, e, esize], unsigned);
    integer element2 = Int(Elem[operand2, e, esize], unsigned);
    integer element3 = Int(Elem[result, e, esize], unsigned);
    integer res = element3 + Abs(element1 - element2);
    Elem[result, e, esize] = res<esize-1:0>;

Z[da] = result;