FAMIN
Floating-point absolute minimum
This instruction determines the minimum absolute value from floating-point elements
of the first source vector and the corresponding floating-point elements
of the second source vector, and places the results in the corresponding elements
of the destination vector.
Regardless of the value of FPCR.AH, the behavior is as follows:
When FPCR.DN is 0, if either element is a NaN, the result
is a quiet NaN.
When FPCR.DN is 1, if either element is a NaN, the result
is the Default NaN, with the sign bit set to 0.
Denormalized inputs and results are never flushed to zero,
as if FPCR.{FZ, FZ16, FIZ} are all 0.
Denormalized inputs never generate an Input Denormal
floating-point exception.
It has encodings from 2 classes:
Half-precision
and
Single-precision and double-precision
0
1
0
1
1
1
0
1
1
0
0
0
0
1
1
1
FAMIN <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
if !IsFeatureImplemented(FEAT_AdvSIMD) || !IsFeatureImplemented(FEAT_FAMINMAX) then
EndOfDecode(Decode_UNDEF);
end;
let d : integer{} = UInt(Rd);
let n : integer{} = UInt(Rn);
let m : integer{} = UInt(Rm);
let esize : integer{} = 16;
let datasize : integer{} = if Q == '1' then 128 else 64;
let elements : integer = datasize DIV esize;
0
1
0
1
1
1
0
1
x
1
1
1
0
1
1
1
FAMIN <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
if !IsFeatureImplemented(FEAT_AdvSIMD) || !IsFeatureImplemented(FEAT_FAMINMAX) then
EndOfDecode(Decode_UNDEF);
end;
if Q == '0' && size == '11' then EndOfDecode(Decode_UNDEF); end;
let d : integer{} = UInt(Rd);
let n : integer{} = UInt(Rn);
let m : integer{} = UInt(Rm);
let esize : integer{} = 8 << UInt(size);
let datasize : integer{} = if Q == '1' then 128 else 64;
let elements : integer = datasize DIV esize;
<Vd>
Is the name of the SIMD&FP destination register, encoded in the "Rd" field.
<T>
For the "Half-precision" variant: is an arrangement specifier,
<T>
For the "Single-precision and double-precision" variant: is an arrangement specifier,
size[0]
Q
<T>
0
0
2S
0
1
4S
1
0
RESERVED
1
1
2D
<Vn>
Is the name of the first SIMD&FP source register, encoded in the "Rn" field.
<Vm>
Is the name of the second SIMD&FP source register, encoded in the "Rm" field.
AArch64_CheckFPAdvSIMDEnabled();
let operand1 : bits(datasize) = V{}(n);
let operand2 : bits(datasize) = V{}(m);
var result : bits(datasize);
for e = 0 to elements-1 do
let op1 : bits(esize) = operand1[e*:esize];
let op2 : bits(esize) = operand2[e*:esize];
result[e*:esize] = FPAbsMin{esize}(op1, op2, FPCR());
end;
V{datasize}(d) = result;
2026-03-26 20:27:25
2026-03_rel