ST1Q
Contiguous store of quadwords from 128-bit element ZA tile slice
The slice number in the tile is selected by the slice index register, modulo the number of 128-bit elements in a Streaming SVE vector. The memory address is generated by scalar base and optional scalar offset which is multiplied by 16 and added to the base address. Inactive elements are not written to memory.
Green
True
SM_1_only
1
1
1
0
0
0
0
1
1
1
1
0
ST1Q { <ZAt><HV>.Q[<Ws>, <offs>] }, <Pg>, [<Xn|SP>{, <Xm>, LSL #4}]
if !HaveSME() then UNDEFINED;
integer n = UInt(Rn);
integer m = UInt(Rm);
integer g = UInt('0':Pg);
integer s = UInt('011':Rs);
integer t = UInt(ZAt);
integer offset = 0;
constant integer esize = 128;
boolean vertical = V == '1';
<ZAt>
Is the name of the ZA tile ZA0-ZA15 to be accessed, encoded in the "ZAt" field.
<HV>
Is the horizontal or vertical slice indicator,
<Ws>
Is the 32-bit name of the slice index register W12-W15, encoded in the "Rs" field.
<offs>
Is the slice index offset 0.
<Pg>
Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" field.
<Xn|SP>
Is the 64-bit name of the general-purpose base register or stack pointer, encoded in the "Rn" field.
<Xm>
Is the optional 64-bit name of the general-purpose offset register, defaulting to XZR, encoded in the "Rm" field.
CheckStreamingSVEAndZAEnabled();
constant integer VL = CurrentVL;
constant integer PL = VL DIV 8;
constant integer dim = VL DIV esize;
bits(64) base;
bits(64) addr;
bits(PL) mask = P[g, PL];
bits(64) moffs = X[m, 64];
bits(32) index = X[s, 32];
integer slice = (UInt(index) + offset) MOD dim;
bits(VL) src;
constant integer mbytes = esize DIV 8;
boolean contiguous = TRUE;
boolean nontemporal = FALSE;
boolean tagchecked = TRUE;
AccessDescriptor accdesc = CreateAccDescSME(MemOp_STORE, nontemporal, contiguous, tagchecked);
if n == 31 then
if AnyActiveElement(mask, esize) ||
ConstrainUnpredictableBool(Unpredictable_CHECKSPNONEACTIVE) then
CheckSPAlignment();
base = SP[];
else
base = X[n, 64];
src = ZAslice[t, esize, vertical, slice, VL];
for e = 0 to dim-1
addr = base + UInt(moffs) * mbytes;
if ActivePredicateElement(mask, e, esize) then
Mem[addr, mbytes, accdesc] = Elem[src, e, esize];
moffs = moffs + 1;