mirror of https://github.com/opencv/opencv.git
Open Source Computer Vision Library
https://opencv.org/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
34 lines
1.1 KiB
34 lines
1.1 KiB
/* slide_hash_rvv.c - RVV version of slide_hash |
|
* Copyright (C) 2023 SiFive, Inc. All rights reserved. |
|
* Contributed by Alex Chiang <alex.chiang@sifive.com> |
|
* For conditions of distribution and use, see copyright notice in zlib.h |
|
*/ |
|
|
|
#ifdef RISCV_RVV |
|
|
|
#include <riscv_vector.h> |
|
|
|
#include "../../zbuild.h" |
|
#include "../../deflate.h" |
|
|
|
static inline void slide_hash_chain(Pos *table, uint32_t entries, uint16_t wsize) { |
|
size_t vl; |
|
while (entries > 0) { |
|
vl = __riscv_vsetvl_e16m4(entries); |
|
vuint16m4_t v_tab = __riscv_vle16_v_u16m4(table, vl); |
|
vuint16m4_t v_diff = __riscv_vsub_vx_u16m4(v_tab, wsize, vl); |
|
vbool4_t mask = __riscv_vmsltu_vx_u16m4_b4(v_tab, wsize, vl); |
|
v_tab = __riscv_vmerge_vxm_u16m4(v_diff, 0, mask, vl); |
|
__riscv_vse16_v_u16m4(table, v_tab, vl); |
|
table += vl, entries -= vl; |
|
} |
|
} |
|
|
|
Z_INTERNAL void slide_hash_rvv(deflate_state *s) { |
|
uint16_t wsize = (uint16_t)s->w_size; |
|
|
|
slide_hash_chain(s->head, HASH_SIZE, wsize); |
|
slide_hash_chain(s->prev, wsize, wsize); |
|
} |
|
|
|
#endif // RISCV_RVV
|
|
|