According to v-spec (section 7.9):
The instructions operate with an effective vector length, evl=NFIELDS*VLEN/EEW,
regardless of current settings in vtype and vl. The usual property that no
elements are written if vstart ≥ vl does not apply to these instructions.
Instead, no elements are written if vstart ≥ evl.
Signed-off-by: eop Chen <eop.chen@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <
164762720573.18409.
3931931227997483525-0@git.sr.ht>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
gen_helper_ldst_whole *fn, DisasContext *s,
bool is_store)
{
+ uint32_t evl = (s->cfg_ptr->vlen / 8) * nf / (1 << s->sew);
+ TCGLabel *over = gen_new_label();
+ tcg_gen_brcondi_tl(TCG_COND_GEU, cpu_vstart, evl, over);
+
TCGv_ptr dest;
TCGv base;
TCGv_i32 desc;
if (!is_store) {
mark_vs_dirty(s);
}
+ gen_set_label(over);
return true;
}