On 6/19/23 00:56, Robin Dapp wrote:
If the pattern is not allowed to fail, then what code enforces the bias
argument's restrictions? I don't see it in the generic expander code.
I have no ideal since this is just copied from len_load/len_store which is
s390 target dependent stuff.
I have sent V7 patch with fixing doc by following your suggestion.
We have:
signed char
internal_len_load_store_bias (internal_fn ifn, machine_mode mode)
{
optab optab = direct_internal_fn_optab (ifn);
insn_code icode = direct_optab_handler (optab, mode);
if (icode != CODE_FOR_nothing)
{
/* For now we only support biases of 0 or -1. Try both of them. */
if (insn_operand_matches (icode, 3, GEN_INT (0)))
return 0;
if (insn_operand_matches (icode, 3, GEN_INT (-1)))
return -1;
}
return VECT_PARTIAL_BIAS_UNSUPPORTED;
Ah. That's not where I expected to find it. Thanks for pointing it out.
Jeff
