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SMAX (vectors)
Signed maximum vectors (predicated).
Determine the signed maximum of active elements of the second source vector and corresponding elements of the first source vector and destructively place the results in the corresponding elements of the first source vector. Inactive elements in the destination vector register remain unmodified.
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 |
0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | size | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | Pg | Zm | Zdn |
if !HaveSVE() then UNDEFINED; integer esize = 8 << UInt(size); integer g = UInt(Pg); integer dn = UInt(Zdn); integer m = UInt(Zm); boolean unsigned = FALSE;
Assembler Symbols
<Zdn> |
Is the name of the first source and destination scalable vector register, encoded in the "Zdn" field. |
<T> |
Is the size specifier,
encoded in
size:
|
<Pg> |
Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" 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(PL) mask = P[g]; bits(VL) operand1 = Z[dn]; bits(VL) operand2 = Z[m]; bits(VL) result; for e = 0 to elements-1 integer element1 = Int(Elem[operand1, e, esize], unsigned); integer element2 = Int(Elem[operand2, e, esize], unsigned); if ElemP[mask, e, esize] == '1' then integer maximum = Max(element1, element2); Elem[result, e, esize] = maximum<esize-1:0>; else Elem[result, e, esize] = Elem[operand1, e, esize]; Z[dn] = result;