CPY (scalar)
Copy general-purpose register to vector elements (predicated)
Copy the general-purpose scalar source register to each active element in the destination vector. Inactive elements in the destination vector register remain unmodified.
Green
True
True
True
True
This instruction is used by the alias
MOV (scalar, predicated)
Unconditionally
The alias is always the preferred disassembly.
0
0
0
0
0
1
0
1
1
0
1
0
0
0
1
0
1
CPY <Zd>.<T>, <Pg>/M, <R><n|SP>
if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED;
constant integer esize = 8 << UInt(size);
constant integer g = UInt(Pg);
constant integer n = UInt(Rn);
constant integer d = UInt(Zd);
<Zd>
Is the name of the destination scalable vector register, encoded in the "Zd" field.
<T>
Is the size specifier,
size
<T>
00
B
01
H
10
S
11
D
<Pg>
Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" field.
<R>
Is a width specifier,
<n|SP>
Is the number [0-30] of the general-purpose source register or the name SP (31), encoded in the "Rn" field.
CheckSVEEnabled();
constant integer VL = CurrentVL;
constant integer PL = VL DIV 8;
constant integer elements = VL DIV esize;
constant bits(PL) mask = P[g, PL];
bits(VL) result = Z[d, VL];
if AnyActiveElement(mask, esize) then
bits(64) operand1;
if n == 31 then
operand1 = SP[];
else
operand1 = X[n, 64];
for e = 0 to elements-1
if ActivePredicateElement(mask, e, esize) then
Elem[result, e, esize] = operand1<esize-1:0>;
Z[d, VL] = result;