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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm64/crypto/nh-neon-core.S | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm64/crypto/nh-neon-core.S')
-rw-r--r-- | arch/arm64/crypto/nh-neon-core.S | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/arch/arm64/crypto/nh-neon-core.S b/arch/arm64/crypto/nh-neon-core.S new file mode 100644 index 0000000000..13eda08fda --- /dev/null +++ b/arch/arm64/crypto/nh-neon-core.S @@ -0,0 +1,104 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * NH - ε-almost-universal hash function, ARM64 NEON accelerated version + * + * Copyright 2018 Google LLC + * + * Author: Eric Biggers <ebiggers@google.com> + */ + +#include <linux/linkage.h> +#include <linux/cfi_types.h> + + KEY .req x0 + MESSAGE .req x1 + MESSAGE_LEN .req x2 + HASH .req x3 + + PASS0_SUMS .req v0 + PASS1_SUMS .req v1 + PASS2_SUMS .req v2 + PASS3_SUMS .req v3 + K0 .req v4 + K1 .req v5 + K2 .req v6 + K3 .req v7 + T0 .req v8 + T1 .req v9 + T2 .req v10 + T3 .req v11 + T4 .req v12 + T5 .req v13 + T6 .req v14 + T7 .req v15 + +.macro _nh_stride k0, k1, k2, k3 + + // Load next message stride + ld1 {T3.16b}, [MESSAGE], #16 + + // Load next key stride + ld1 {\k3\().4s}, [KEY], #16 + + // Add message words to key words + add T0.4s, T3.4s, \k0\().4s + add T1.4s, T3.4s, \k1\().4s + add T2.4s, T3.4s, \k2\().4s + add T3.4s, T3.4s, \k3\().4s + + // Multiply 32x32 => 64 and accumulate + mov T4.d[0], T0.d[1] + mov T5.d[0], T1.d[1] + mov T6.d[0], T2.d[1] + mov T7.d[0], T3.d[1] + umlal PASS0_SUMS.2d, T0.2s, T4.2s + umlal PASS1_SUMS.2d, T1.2s, T5.2s + umlal PASS2_SUMS.2d, T2.2s, T6.2s + umlal PASS3_SUMS.2d, T3.2s, T7.2s +.endm + +/* + * void nh_neon(const u32 *key, const u8 *message, size_t message_len, + * __le64 hash[NH_NUM_PASSES]) + * + * It's guaranteed that message_len % 16 == 0. + */ +SYM_TYPED_FUNC_START(nh_neon) + + ld1 {K0.4s,K1.4s}, [KEY], #32 + movi PASS0_SUMS.2d, #0 + movi PASS1_SUMS.2d, #0 + ld1 {K2.4s}, [KEY], #16 + movi PASS2_SUMS.2d, #0 + movi PASS3_SUMS.2d, #0 + + subs MESSAGE_LEN, MESSAGE_LEN, #64 + blt .Lloop4_done +.Lloop4: + _nh_stride K0, K1, K2, K3 + _nh_stride K1, K2, K3, K0 + _nh_stride K2, K3, K0, K1 + _nh_stride K3, K0, K1, K2 + subs MESSAGE_LEN, MESSAGE_LEN, #64 + bge .Lloop4 + +.Lloop4_done: + ands MESSAGE_LEN, MESSAGE_LEN, #63 + beq .Ldone + _nh_stride K0, K1, K2, K3 + + subs MESSAGE_LEN, MESSAGE_LEN, #16 + beq .Ldone + _nh_stride K1, K2, K3, K0 + + subs MESSAGE_LEN, MESSAGE_LEN, #16 + beq .Ldone + _nh_stride K2, K3, K0, K1 + +.Ldone: + // Sum the accumulators for each pass, then store the sums to 'hash' + addp T0.2d, PASS0_SUMS.2d, PASS1_SUMS.2d + addp T1.2d, PASS2_SUMS.2d, PASS3_SUMS.2d + st1 {T0.16b,T1.16b}, [HASH] + ret +SYM_FUNC_END(nh_neon) |