1 /* 2 * RISC-V Vector Extension Internals 3 * 4 * Copyright (c) 2020 T-Head Semiconductor Co., Ltd. All rights reserved. 5 * 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. 9 * 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 13 * more details. 14 * 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/>. 17 */ 18 19 #include "qemu/osdep.h" 20 #include "vector_internals.h" 21 22 /* set agnostic elements to 1s */ 23 void vext_set_elems_1s(void *base, uint32_t is_agnostic, uint32_t cnt, 24 uint32_t tot) 25 { 26 if (is_agnostic == 0) { 27 /* policy undisturbed */ 28 return; 29 } 30 if (tot - cnt == 0) { 31 return ; 32 } 33 memset(base + cnt, -1, tot - cnt); 34 } 35 36 void do_vext_vv(void *vd, void *v0, void *vs1, void *vs2, 37 CPURISCVState *env, uint32_t desc, 38 opivv2_fn *fn, uint32_t esz) 39 { 40 uint32_t vm = vext_vm(desc); 41 uint32_t vl = env->vl; 42 uint32_t total_elems = vext_get_total_elems(env, desc, esz); 43 uint32_t vta = vext_vta(desc); 44 uint32_t vma = vext_vma(desc); 45 uint32_t i; 46 47 VSTART_CHECK_EARLY_EXIT(env); 48 49 for (i = env->vstart; i < vl; i++) { 50 if (!vm && !vext_elem_mask(v0, i)) { 51 /* set masked-off elements to 1s */ 52 vext_set_elems_1s(vd, vma, i * esz, (i + 1) * esz); 53 continue; 54 } 55 fn(vd, vs1, vs2, i); 56 } 57 env->vstart = 0; 58 /* set tail elements to 1s */ 59 vext_set_elems_1s(vd, vta, vl * esz, total_elems * esz); 60 } 61 62 void do_vext_vx(void *vd, void *v0, target_long s1, void *vs2, 63 CPURISCVState *env, uint32_t desc, 64 opivx2_fn fn, uint32_t esz) 65 { 66 uint32_t vm = vext_vm(desc); 67 uint32_t vl = env->vl; 68 uint32_t total_elems = vext_get_total_elems(env, desc, esz); 69 uint32_t vta = vext_vta(desc); 70 uint32_t vma = vext_vma(desc); 71 uint32_t i; 72 73 VSTART_CHECK_EARLY_EXIT(env); 74 75 for (i = env->vstart; i < vl; i++) { 76 if (!vm && !vext_elem_mask(v0, i)) { 77 /* set masked-off elements to 1s */ 78 vext_set_elems_1s(vd, vma, i * esz, (i + 1) * esz); 79 continue; 80 } 81 fn(vd, s1, vs2, i); 82 } 83 env->vstart = 0; 84 /* set tail elements to 1s */ 85 vext_set_elems_1s(vd, vta, vl * esz, total_elems * esz); 86 } 87