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b886d83c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6ec4e251 AB |
2 | /* |
3 | * Copyright (C) 2012 Intel Corporation | |
4 | * Copyright (C) 2017 Linaro Ltd. <ard.biesheuvel@linaro.org> | |
6ec4e251 AB |
5 | */ |
6 | ||
7 | #include <arm_neon.h> | |
8 | ||
6ec4e251 AB |
9 | #ifdef CONFIG_ARM |
10 | /* | |
11 | * AArch32 does not provide this intrinsic natively because it does not | |
12 | * implement the underlying instruction. AArch32 only provides a 64-bit | |
13 | * wide vtbl.8 instruction, so use that instead. | |
14 | */ | |
15 | static uint8x16_t vqtbl1q_u8(uint8x16_t a, uint8x16_t b) | |
16 | { | |
17 | union { | |
18 | uint8x16_t val; | |
19 | uint8x8x2_t pair; | |
20 | } __a = { a }; | |
21 | ||
22 | return vcombine_u8(vtbl2_u8(__a.pair, vget_low_u8(b)), | |
23 | vtbl2_u8(__a.pair, vget_high_u8(b))); | |
24 | } | |
25 | #endif | |
26 | ||
27 | void __raid6_2data_recov_neon(int bytes, uint8_t *p, uint8_t *q, uint8_t *dp, | |
28 | uint8_t *dq, const uint8_t *pbmul, | |
29 | const uint8_t *qmul) | |
30 | { | |
31 | uint8x16_t pm0 = vld1q_u8(pbmul); | |
32 | uint8x16_t pm1 = vld1q_u8(pbmul + 16); | |
33 | uint8x16_t qm0 = vld1q_u8(qmul); | |
34 | uint8x16_t qm1 = vld1q_u8(qmul + 16); | |
1ad3935b | 35 | uint8x16_t x0f = vdupq_n_u8(0x0f); |
6ec4e251 AB |
36 | |
37 | /* | |
38 | * while ( bytes-- ) { | |
39 | * uint8_t px, qx, db; | |
40 | * | |
41 | * px = *p ^ *dp; | |
42 | * qx = qmul[*q ^ *dq]; | |
43 | * *dq++ = db = pbmul[px] ^ qx; | |
44 | * *dp++ = db ^ px; | |
45 | * p++; q++; | |
46 | * } | |
47 | */ | |
48 | ||
49 | while (bytes) { | |
50 | uint8x16_t vx, vy, px, qx, db; | |
51 | ||
52 | px = veorq_u8(vld1q_u8(p), vld1q_u8(dp)); | |
53 | vx = veorq_u8(vld1q_u8(q), vld1q_u8(dq)); | |
54 | ||
335ebe30 | 55 | vy = vshrq_n_u8(vx, 4); |
6ec4e251 | 56 | vx = vqtbl1q_u8(qm0, vandq_u8(vx, x0f)); |
335ebe30 | 57 | vy = vqtbl1q_u8(qm1, vy); |
6ec4e251 AB |
58 | qx = veorq_u8(vx, vy); |
59 | ||
335ebe30 | 60 | vy = vshrq_n_u8(px, 4); |
6ec4e251 | 61 | vx = vqtbl1q_u8(pm0, vandq_u8(px, x0f)); |
335ebe30 | 62 | vy = vqtbl1q_u8(pm1, vy); |
6ec4e251 AB |
63 | vx = veorq_u8(vx, vy); |
64 | db = veorq_u8(vx, qx); | |
65 | ||
66 | vst1q_u8(dq, db); | |
67 | vst1q_u8(dp, veorq_u8(db, px)); | |
68 | ||
69 | bytes -= 16; | |
70 | p += 16; | |
71 | q += 16; | |
72 | dp += 16; | |
73 | dq += 16; | |
74 | } | |
75 | } | |
76 | ||
77 | void __raid6_datap_recov_neon(int bytes, uint8_t *p, uint8_t *q, uint8_t *dq, | |
78 | const uint8_t *qmul) | |
79 | { | |
80 | uint8x16_t qm0 = vld1q_u8(qmul); | |
81 | uint8x16_t qm1 = vld1q_u8(qmul + 16); | |
1ad3935b | 82 | uint8x16_t x0f = vdupq_n_u8(0x0f); |
6ec4e251 AB |
83 | |
84 | /* | |
85 | * while (bytes--) { | |
86 | * *p++ ^= *dq = qmul[*q ^ *dq]; | |
87 | * q++; dq++; | |
88 | * } | |
89 | */ | |
90 | ||
91 | while (bytes) { | |
92 | uint8x16_t vx, vy; | |
93 | ||
94 | vx = veorq_u8(vld1q_u8(q), vld1q_u8(dq)); | |
95 | ||
335ebe30 | 96 | vy = vshrq_n_u8(vx, 4); |
6ec4e251 | 97 | vx = vqtbl1q_u8(qm0, vandq_u8(vx, x0f)); |
335ebe30 | 98 | vy = vqtbl1q_u8(qm1, vy); |
6ec4e251 AB |
99 | vx = veorq_u8(vx, vy); |
100 | vy = veorq_u8(vx, vld1q_u8(p)); | |
101 | ||
102 | vst1q_u8(dq, vx); | |
103 | vst1q_u8(p, vy); | |
104 | ||
105 | bytes -= 16; | |
106 | p += 16; | |
107 | q += 16; | |
108 | dq += 16; | |
109 | } | |
110 | } |