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/*
* arm/matchfinder_impl.h - ARM implementations of matchfinder functions
*
* Copyright 2016 Eric Biggers
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef LIB_ARM_MATCHFINDER_IMPL_H
#define LIB_ARM_MATCHFINDER_IMPL_H
#ifdef __ARM_NEON
# include <arm_neon.h>
static forceinline void
matchfinder_init_neon(mf_pos_t *data, size_t size)
{
int16x8_t *p = (int16x8_t *)data;
int16x8_t v = (int16x8_t) {
MATCHFINDER_INITVAL, MATCHFINDER_INITVAL, MATCHFINDER_INITVAL,
MATCHFINDER_INITVAL, MATCHFINDER_INITVAL, MATCHFINDER_INITVAL,
MATCHFINDER_INITVAL, MATCHFINDER_INITVAL,
};
STATIC_ASSERT(MATCHFINDER_MEM_ALIGNMENT % sizeof(*p) == 0);
STATIC_ASSERT(MATCHFINDER_SIZE_ALIGNMENT % (4 * sizeof(*p)) == 0);
STATIC_ASSERT(sizeof(mf_pos_t) == 2);
do {
p[0] = v;
p[1] = v;
p[2] = v;
p[3] = v;
p += 4;
size -= 4 * sizeof(*p);
} while (size != 0);
}
#define matchfinder_init matchfinder_init_neon
static forceinline void
matchfinder_rebase_neon(mf_pos_t *data, size_t size)
{
int16x8_t *p = (int16x8_t *)data;
int16x8_t v = (int16x8_t) {
(u16)-MATCHFINDER_WINDOW_SIZE, (u16)-MATCHFINDER_WINDOW_SIZE,
(u16)-MATCHFINDER_WINDOW_SIZE, (u16)-MATCHFINDER_WINDOW_SIZE,
(u16)-MATCHFINDER_WINDOW_SIZE, (u16)-MATCHFINDER_WINDOW_SIZE,
(u16)-MATCHFINDER_WINDOW_SIZE, (u16)-MATCHFINDER_WINDOW_SIZE,
};
STATIC_ASSERT(MATCHFINDER_MEM_ALIGNMENT % sizeof(*p) == 0);
STATIC_ASSERT(MATCHFINDER_SIZE_ALIGNMENT % (4 * sizeof(*p)) == 0);
STATIC_ASSERT(sizeof(mf_pos_t) == 2);
do {
p[0] = vqaddq_s16(p[0], v);
p[1] = vqaddq_s16(p[1], v);
p[2] = vqaddq_s16(p[2], v);
p[3] = vqaddq_s16(p[3], v);
p += 4;
size -= 4 * sizeof(*p);
} while (size != 0);
}
#define matchfinder_rebase matchfinder_rebase_neon
#endif /* __ARM_NEON */
#endif /* LIB_ARM_MATCHFINDER_IMPL_H */
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