Multi-vector convert from half-precision to deinterleaved single-precision
This instruction converts each element of the source vector from half-precision to single-precision floating-point, and places the two-way deinterleaved 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 | 1 | |||||||
| L | |||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SME_F16F16) then EndOfDecode(Decode_UNDEF); constant integer n = UInt(Zn); constant integer d = 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(); constant integer VL = CurrentVL; constant integer pairs = VL DIV 32; constant bits(VL) operand = Z[n, VL]; bits(VL) result0; bits(VL) result1; for p = 0 to pairs-1 constant bits(16) element1 = Elem[operand, 2*p+0, 16]; constant bits(16) element2 = Elem[operand, 2*p+1, 16]; constant bits(32) res1 = FPConvertSVE(element1, FPCR, 32); constant bits(32) res2 = FPConvertSVE(element2, FPCR, 32); Elem[result0, p, 32] = res1; Elem[result1, p, 32] = res2; Z[d+0, VL] = result0; Z[d+1, VL] = result1;