On 2020/3/15 6:47, Richard Henderson wrote:
> On 3/12/20 7:58 AM, LIU Zhiwei wrote:
>> +
>> +/* Vector Floating-Point Merge Instruction */
>> +static bool opfvf_vfmerge_check(DisasContext *s, arg_rmrr *a)
>> +{
>> +    return (vext_check_isa_ill(s, RVV) &&
>> +            vext_check_overlap_mask(s, a->rd, a->vm, false) &&
>> +            vext_check_reg(s, a->rd, false) &&
>> +            vext_check_reg(s, a->rs2, false) &&
>> +            ((a->vm == 0) || (a->rs2 == 0)) &&
>> +            (s->sew != 0));
>> +}
>> +GEN_OPFVF_TRANS(vfmerge_vfm, opfvf_vfmerge_check)
> Similar comments as for integer merge, using tcg_gen_gvec_dup_i64 for
> unpredicated merges.
>
> In fact, there's no reason at all to define a helper function for this one.  I
> would expect you do be able to use the exact same helpers as for the integer
> merges.

Do you mean that I should expands TCGv to TCGv_i64 for vmv.v.x in 
translation?
So that I can reuse it.

void gen_helper_vmv_v_x(TCG_ptr, TCGv_i64, TCGv_env, TCGv_i32);

Zhiwei

>
> r~