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UMAX (immediate)

Unsigned maximum with immediate (unpredicated).

Determine the unsigned maximum of an immediate and each element of the source vector, and destructively place the results in the corresponding elements of the source vector. The immediate is an unsigned 8-bit value in the range 0 to 255, inclusive. This instruction is unpredicated.



UMAX <Zdn>.<T>, <Zdn>.<T>, #<imm>

if !HaveSVE() then UNDEFINED;
integer esize = 8 << UInt(size);
integer dn = UInt(Zdn);
boolean unsigned = TRUE;
integer imm = Int(imm8, unsigned);

Assembler Symbols


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

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

Is the unsigned immediate operand, in the range 0 to 255, encoded in the "imm8" field.


integer elements = VL DIV esize;
bits(VL) operand1 = Z[dn];
bits(VL) result;

for e = 0 to elements-1
    integer element1 = Int(Elem[operand1, e, esize], unsigned);
    Elem[result, e, esize] = Max(element1, imm)<esize-1:0>;

Z[dn] = result;