FDUP
Broadcast 8-bit floating-point immediate to vector elements (unpredicated)
Unconditionally broadcast the floating-point immediate into each element of the destination vector. This instruction is unpredicated.
Green
False
This instruction is used by the alias
FMOV (immediate, unpredicated)
Unconditionally
The alias is always the preferred disassembly.
0
0
1
0
0
1
0
1
1
1
1
0
0
1
1
1
0
FDUP <Zd>.<T>, #<const>
if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED;
if size == '00' then UNDEFINED;
constant integer esize = 8 << UInt(size);
constant integer d = UInt(Zd);
constant bits(esize) imm = VFPExpandImm(imm8, esize);
<Zd>
Is the name of the destination scalable vector register, encoded in the "Zd" field.
<T>
Is the size specifier,
size
<T>
00
RESERVED
01
H
10
S
11
D
<const>
Is a floating-point immediate value expressible as ±n÷16×2^r, where n and r are integers such that 16 ≤ n ≤ 31 and -3 ≤ r ≤ 4, i.e. a normalized binary floating-point encoding with 1 sign bit, 3-bit exponent, and 4-bit fractional part, encoded in the "imm8" field.
CheckSVEEnabled();
constant integer VL = CurrentVL;
constant integer elements = VL DIV esize;
bits(VL) result;
for e = 0 to elements-1
Elem[result, e, esize] = imm;
Z[d, VL] = result;