SQRSHRU (two registers)
Multi-vector signed saturating rounding shift right unsigned narrow by immediate
Shift right by an immediate value, the signed integer value in each element of the two source vectors and place the rounded results in the half-width destination elements. Each result element is saturated to the half-width N-bit element's unsigned integer range 0 to (2N)-1. The immediate shift amount is an unsigned value in the range 1 to 16.
This instruction is unpredicated.
Green
False
SM_1_only
1
1
0
0
0
0
0
1
1
1
1
1
1
1
0
1
0
1
0
SQRSHRU <Zd>.H, { <Zn1>.S-<Zn2>.S }, #<const>
if !HaveSME2() then UNDEFINED;
constant integer esize = 16;
integer n = UInt(Zn:'0');
integer d = UInt(Zd);
integer shift = esize - UInt(imm4);
<Zd>
Is the name of the destination scalable vector register, encoded in the "Zd" field.
<Zn1>
Is the name of the first scalable vector register of a multi-vector sequence, encoded as "Zn" times 2.
<Zn2>
Is the name of the second scalable vector register of a multi-vector sequence, encoded as "Zn" times 2 plus 1.
<const>
Is the immediate shift amount, in the range 1 to 16, encoded in the "imm4" field.
CheckStreamingSVEEnabled();
constant integer VL = CurrentVL;
constant integer elements = VL DIV (2 * esize);
bits(VL) result;
integer round_const = 1 << (shift-1);
for r = 0 to 1
bits(VL) operand = Z[n+r, VL];
for e = 0 to elements-1
bits(2 * esize) element = Elem[operand, e, 2 * esize];
integer res = (SInt(element) + round_const) >> shift;
Elem[result, r*elements + e, esize] = UnsignedSat(res, esize);
Z[d, VL] = result;