1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/* compare256_rvv.c - RVV version of compare256
* 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 "zbuild.h"
#include "zmemory.h"
#include "deflate.h"
#include "fallback_builtins.h"
#include <riscv_vector.h>
static inline uint32_t compare256_rvv_static(const uint8_t *src0, const uint8_t *src1) {
uint32_t len = 0;
size_t vl;
long found_diff;
do {
vl = __riscv_vsetvl_e8m4(256 - len);
vuint8m4_t v_src0 = __riscv_vle8_v_u8m4(src0, vl);
vuint8m4_t v_src1 = __riscv_vle8_v_u8m4(src1, vl);
vbool2_t v_mask = __riscv_vmsne_vv_u8m4_b2(v_src0, v_src1, vl);
found_diff = __riscv_vfirst_m_b2(v_mask, vl);
if (found_diff >= 0)
return len + (uint32_t)found_diff;
src0 += vl, src1 += vl, len += vl;
} while (len < 256);
return 256;
}
Z_INTERNAL uint32_t compare256_rvv(const uint8_t *src0, const uint8_t *src1) {
return compare256_rvv_static(src0, src1);
}
#define LONGEST_MATCH longest_match_rvv
#define COMPARE256 compare256_rvv_static
#include "match_tpl.h"
#define LONGEST_MATCH_SLOW
#define LONGEST_MATCH longest_match_slow_rvv
#define COMPARE256 compare256_rvv_static
#include "match_tpl.h"
#endif // RISCV_RVV
|
