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2957f5084d
* Update zlibng * Set cmake path more directly in zlibng to hopefully fix an issue with the build on drone * I'm dumb, missing / in path * Mackal helps with a dumb gitignore issue * Adding all the files, not sure what's ignoring them and im tired of looking * Some tweaks to zlibng build to hopefully get it to build properly. works on msvc now
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/* slide_neon.c -- Optimized hash table shifting for ARM with support for NEON instructions
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* Copyright (C) 2017-2020 Mika T. Lindqvist
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*
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* Authors:
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* Mika T. Lindqvist <postmaster@raasu.org>
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* Jun He <jun.he@arm.com>
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*
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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#if defined(ARM_NEON_SLIDEHASH)
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#ifdef _M_ARM64
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# include <arm64_neon.h>
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#else
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# include <arm_neon.h>
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#endif
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#include "../../zbuild.h"
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#include "../../deflate.h"
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/* SIMD version of hash_chain rebase */
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static inline void slide_hash_chain(Pos *table, unsigned int entries, uint16_t window_size) {
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Z_REGISTER uint16x8_t v, *p;
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Z_REGISTER size_t n;
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size_t size = entries*sizeof(table[0]);
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Assert((size % sizeof(uint16x8_t) * 8 == 0), "hash table size err");
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Assert(sizeof(Pos) == 2, "Wrong Pos size");
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v = vdupq_n_u16(window_size);
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p = (uint16x8_t *)table;
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n = size / (sizeof(uint16x8_t) * 8);
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do {
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p[0] = vqsubq_u16(p[0], v);
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p[1] = vqsubq_u16(p[1], v);
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p[2] = vqsubq_u16(p[2], v);
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p[3] = vqsubq_u16(p[3], v);
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p[4] = vqsubq_u16(p[4], v);
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p[5] = vqsubq_u16(p[5], v);
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p[6] = vqsubq_u16(p[6], v);
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p[7] = vqsubq_u16(p[7], v);
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p += 8;
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} while (--n);
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}
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Z_INTERNAL void slide_hash_neon(deflate_state *s) {
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unsigned int wsize = s->w_size;
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slide_hash_chain(s->head, HASH_SIZE, wsize);
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slide_hash_chain(s->prev, wsize, wsize);
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}
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#endif
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