mirror of
https://github.com/opencv/opencv.git
synced 2024-12-15 18:09:11 +08:00
85923c8f30
Update zlib-ng to 2.2.1 #26113 Release: https://github.com/zlib-ng/zlib-ng/releases/tag/2.2.1 ARM diagnostics patch: https://github.com/zlib-ng/zlib-ng/pull/1774 ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [x] The PR is proposed to the proper branch - [ ] There is a reference to the original bug report and related work - [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [ ] The feature is well documented and sample code can be built with the project CMake
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* slide_hash_neon.c -- Optimized hash table shifting for ARM with support for NEON instructions
|
|
* Copyright (C) 2017-2020 Mika T. Lindqvist
|
|
*
|
|
* Authors:
|
|
* Mika T. Lindqvist <postmaster@raasu.org>
|
|
* Jun He <jun.he@arm.com>
|
|
*
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
#ifdef ARM_NEON
|
|
#include "neon_intrins.h"
|
|
#include "zbuild.h"
|
|
#include "deflate.h"
|
|
|
|
/* SIMD version of hash_chain rebase */
|
|
static inline void slide_hash_chain(Pos *table, uint32_t entries, uint16_t wsize) {
|
|
Z_REGISTER uint16x8_t v;
|
|
uint16x8x4_t p0, p1;
|
|
Z_REGISTER size_t n;
|
|
|
|
size_t size = entries*sizeof(table[0]);
|
|
Assert((size % sizeof(uint16x8_t) * 8 == 0), "hash table size err");
|
|
|
|
Assert(sizeof(Pos) == 2, "Wrong Pos size");
|
|
v = vdupq_n_u16(wsize);
|
|
|
|
n = size / (sizeof(uint16x8_t) * 8);
|
|
do {
|
|
p0 = vld1q_u16_x4(table);
|
|
p1 = vld1q_u16_x4(table+32);
|
|
vqsubq_u16_x4_x1(p0, p0, v);
|
|
vqsubq_u16_x4_x1(p1, p1, v);
|
|
vst1q_u16_x4(table, p0);
|
|
vst1q_u16_x4(table+32, p1);
|
|
table += 64;
|
|
} while (--n);
|
|
}
|
|
|
|
Z_INTERNAL void slide_hash_neon(deflate_state *s) {
|
|
unsigned int wsize = s->w_size;
|
|
|
|
slide_hash_chain(s->head, HASH_SIZE, wsize);
|
|
slide_hash_chain(s->prev, wsize, wsize);
|
|
}
|
|
#endif
|