2 * RISC-V Vector Extension Internals
4 * Copyright (c) 2020 T-Head Semiconductor Co., Ltd. All rights reserved.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2 or later, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program. If not, see <http://www.gnu.org/licenses/>.
19 #include "vector_internals.h"
21 /* set agnostic elements to 1s */
22 void vext_set_elems_1s(void *base
, uint32_t is_agnostic
, uint32_t cnt
,
25 if (is_agnostic
== 0) {
26 /* policy undisturbed */
32 memset(base
+ cnt
, -1, tot
- cnt
);
35 void do_vext_vv(void *vd
, void *v0
, void *vs1
, void *vs2
,
36 CPURISCVState
*env
, uint32_t desc
,
37 opivv2_fn
*fn
, uint32_t esz
)
39 uint32_t vm
= vext_vm(desc
);
40 uint32_t vl
= env
->vl
;
41 uint32_t total_elems
= vext_get_total_elems(env
, desc
, esz
);
42 uint32_t vta
= vext_vta(desc
);
43 uint32_t vma
= vext_vma(desc
);
46 for (i
= env
->vstart
; i
< vl
; i
++) {
47 if (!vm
&& !vext_elem_mask(v0
, i
)) {
48 /* set masked-off elements to 1s */
49 vext_set_elems_1s(vd
, vma
, i
* esz
, (i
+ 1) * esz
);
55 /* set tail elements to 1s */
56 vext_set_elems_1s(vd
, vta
, vl
* esz
, total_elems
* esz
);
59 void do_vext_vx(void *vd
, void *v0
, target_long s1
, void *vs2
,
60 CPURISCVState
*env
, uint32_t desc
,
61 opivx2_fn fn
, uint32_t esz
)
63 uint32_t vm
= vext_vm(desc
);
64 uint32_t vl
= env
->vl
;
65 uint32_t total_elems
= vext_get_total_elems(env
, desc
, esz
);
66 uint32_t vta
= vext_vta(desc
);
67 uint32_t vma
= vext_vma(desc
);
70 for (i
= env
->vstart
; i
< vl
; i
++) {
71 if (!vm
&& !vext_elem_mask(v0
, i
)) {
72 /* set masked-off elements to 1s */
73 vext_set_elems_1s(vd
, vma
, i
* esz
, (i
+ 1) * esz
);
79 /* set tail elements to 1s */
80 vext_set_elems_1s(vd
, vta
, vl
* esz
, total_elems
* esz
);