SLI
Shift left and insert (immediate)
Shift each source vector element left by an immediate value, and insert the result into the corresponding vector element in the destination vector register, merging the shifted bits from each source element with existing bits in each destination vector element. The immediate shift amount is an unsigned value in the range 0 to number of bits per element minus 1. This instruction is unpredicated.
Green
False
True
0
1
0
0
0
1
0
1
0
1
1
1
1
0
1
SLI <Zd>.<T>, <Zn>.<T>, #<const>
if !IsFeatureImplemented(FEAT_SVE2) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED;
constant bits(4) tsize = tszh:tszl;
if tsize == '0000' then UNDEFINED;
constant integer esize = 8 << HighestSetBit(tsize);
constant integer n = UInt(Zn);
constant integer d = UInt(Zd);
constant integer shift = UInt(tsize:imm3) - esize;
<Zd>
Is the name of the destination scalable vector register, encoded in the "Zd" field.
<T>
Is the size specifier,
tszh
tszl
<T>
00
00
RESERVED
00
01
B
00
1x
H
01
xx
S
1x
xx
D
<Zn>
Is the name of the source scalable vector register, encoded in the "Zn" field.
<const>
Is the immediate shift amount, in the range 0 to number of bits per element minus 1, encoded in "tszh:tszl:imm3".
CheckSVEEnabled();
constant integer VL = CurrentVL;
constant integer PL = VL DIV 8;
constant integer elements = VL DIV esize;
constant bits(VL) operand = Z[n, VL];
bits(VL) result = Z[d, VL];
for e = 0 to elements-1
constant bits(esize) element1 = Elem[result, e, esize];
constant bits(esize) element2 = Elem[operand, e, esize];
constant bits(esize) mask = LSL(Ones(esize), shift);
constant bits(esize) shiftedval = LSL(element2, shift);
Elem[result, e, esize] = (element1 AND (NOT mask)) OR shiftedval;
Z[d, VL] = result;