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8374525: RISC-V: Several masked float16 vector operations are not supported

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Reviewed-by: fjiang, fyang
This commit is contained in:
Dingli Zhang 2026-01-06 12:49:16 +00:00
parent 532a0a65b1
commit df5b49e604
1 changed files with 17 additions and 2 deletions
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19
src/hotspot/cpu/riscv/riscv_v.ad
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@ -114,12 +114,12 @@ source %{
case Op_VectorCastHF2F:
case Op_VectorCastF2HF:
case Op_AddVHF:
case Op_SubVHF:
case Op_MulVHF:
case Op_DivVHF:
case Op_MaxVHF:
case Op_MinVHF:
case Op_MulVHF:
case Op_SqrtVHF:
case Op_SubVHF:
return UseZvfh;
case Op_FmaVHF:
return UseZvfh && UseFMA;
@ -147,13 +147,28 @@ source %{
if (!UseRVV) {
return false;
}
switch (opcode) {
case Op_SelectFromTwoVector:
// There is no masked version of selectFrom two vector, i.e. selectFrom(av, bv, mask) in vector API.
return false;
// Currently, the masked versions of the following 8 Float16 operations are disabled.
// When the support for Float16 vector classes is added in VectorAPI and the masked
// Float16 IR can be generated, these masked operations will be enabled and relevant
// backend support added.
case Op_AddVHF:
case Op_SubVHF:
case Op_MulVHF:
case Op_DivVHF:
case Op_MaxVHF:
case Op_MinVHF:
case Op_SqrtVHF:
case Op_FmaVHF:
return false;
default:
break;
}
return match_rule_supported_vector(opcode, vlen, bt);
}