FMINNM (multiple vectors)
Multi-vector floating-point minimum number
Determine the minimum number value of floating-point elements of the two or four second source vectors and the corresponding floating-point elements of the two or four first source vectors and destructively place the results in the corresponding elements of the two or four first source vectors. If one element value is numeric and the other is a quiet NaN, then the result is the numeric value.
This instruction follows SME2 floating-point numerical behaviors corresponding to instructions that place their results in one or more SVE Z vectors.
This instruction is unpredicated.
Green
False
SM_1_only
It has encodings from 2 classes:
Two registers
and
Four registers
1
1
0
0
0
0
0
1
!= 00
1
0
1
0
1
1
0
0
0
1
0
0
1
1
FMINNM { <Zdn1>.<T>-<Zdn2>.<T> }, { <Zdn1>.<T>-<Zdn2>.<T> }, { <Zm1>.<T>-<Zm2>.<T> }
if !HaveSME2() then UNDEFINED;
constant integer esize = 8 << UInt(size);
integer dn = UInt(Zdn:'0');
integer m = UInt(Zm:'0');
constant integer nreg = 2;
1
1
0
0
0
0
0
1
!= 00
1
0
0
1
0
1
1
1
0
0
1
0
0
1
0
1
FMINNM { <Zdn1>.<T>-<Zdn4>.<T> }, { <Zdn1>.<T>-<Zdn4>.<T> }, { <Zm1>.<T>-<Zm4>.<T> }
if !HaveSME2() then UNDEFINED;
constant integer esize = 8 << UInt(size);
integer dn = UInt(Zdn:'00');
integer m = UInt(Zm:'00');
constant integer nreg = 4;
<Zdn1>
For the two registers variant: is the name of the first scalable vector register of a multi-vector sequence, encoded as "Zdn" times 2.
<Zdn1>
For the four registers variant: is the name of the first scalable vector register of a multi-vector sequence, encoded as "Zdn" times 4.
<T>
Is the size specifier,
<Zdn4>
Is the name of the fourth scalable vector register of a multi-vector sequence, encoded as "Zdn" times 4 plus 3.
<Zdn2>
Is the name of the second scalable vector register of a multi-vector sequence, encoded as "Zdn" times 2 plus 1.
<Zm1>
For the two registers variant: is the name of the first scalable vector register of a multi-vector sequence, encoded as "Zm" times 2.
<Zm1>
For the four registers variant: is the name of the first scalable vector register of a multi-vector sequence, encoded as "Zm" times 4.
<Zm4>
Is the name of the fourth scalable vector register of a multi-vector sequence, encoded as "Zm" times 4 plus 3.
<Zm2>
Is the name of the second scalable vector register of a multi-vector sequence, encoded as "Zm" times 2 plus 1.
CheckStreamingSVEEnabled();
constant integer VL = CurrentVL;
constant integer elements = VL DIV esize;
array [0..3] of bits(VL) results;
for r = 0 to nreg-1
bits(VL) operand1 = Z[dn+r, VL];
bits(VL) operand2 = Z[m+r, VL];
for e = 0 to elements-1
bits(esize) element1 = Elem[operand1, e, esize];
bits(esize) element2 = Elem[operand2, e, esize];
Elem[results[r], e, esize] = FPMinNum(element1, element2, FPCR[]);
for r = 0 to nreg-1
Z[dn+r, VL] = results[r];