Multi-vector half-precision convert to single-precision
This instruction converts each element of the source vector from half-precision to single-precision floating-point, and places the results in the double-width destination elements of the destination vectors.
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.
ID_AA64SMFR0_EL1.F16F16 indicates whether this instruction is implemented.
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | Zn | Zd | 0 | |||||||
| L | |||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SME_F16F16) then EndOfDecode(Decode_UNDEF); end; let n : integer = UInt(Zn); let d : integer = UInt(Zd::'0');
| <Zd1> |
Is the name of the first scalable vector register of the destination multi-vector group, encoded as "Zd" times 2. |
| <Zd2> |
Is the name of the second scalable vector register of the destination multi-vector group, encoded as "Zd" times 2 plus 1. |
| <Zn> |
Is the name of the source scalable vector register, encoded in the "Zn" field. |
CheckStreamingSVEEnabled(); let VL : integer{} = CurrentVL(); let elements : integer = VL DIV 16; let operand : bits(VL) = Z{}(n); var result : bits(2*VL); for e = 0 to elements-1 do let element : bits(16) = operand[e*:16]; let res : bits(32) = FPConvertSVE{32, 16}(element, FPCR()); result[e*:32] = res; end; Z{VL}(d+0) = result[VL-1:0]; Z{VL}(d+1) = result[2*VL-1:VL];
2025-09_diff_tag 2025-11-28 16:29:05
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