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sha256_armv8a_ce_a64.S
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sha256_armv8a_ce_a64.S
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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (c) 2015-2020, Linaro Limited
* Copyright (C) 2014 Linaro Ltd <ard.biesheuvel@linaro.org>
*/
/* Core SHA-224/SHA-256 transform using v8 Crypto Extensions */
#include <asm.S>
.arch armv8-a+crypto
dga .req q20
dgav .req v20
dgb .req q21
dgbv .req v21
t0 .req v22
t1 .req v23
dg0q .req q24
dg0v .req v24
dg1q .req q25
dg1v .req v25
dg2q .req q26
dg2v .req v26
.macro add_only, ev, rc, s0
mov dg2v.16b, dg0v.16b
.ifeq \ev
add t1.4s, v\s0\().4s, \rc\().4s
sha256h dg0q, dg1q, t0.4s
sha256h2 dg1q, dg2q, t0.4s
.else
.ifnb \s0
add t0.4s, v\s0\().4s, \rc\().4s
.endif
sha256h dg0q, dg1q, t1.4s
sha256h2 dg1q, dg2q, t1.4s
.endif
.endm
.macro add_update, ev, rc, s0, s1, s2, s3
sha256su0 v\s0\().4s, v\s1\().4s
add_only \ev, \rc, \s1
sha256su1 v\s0\().4s, v\s2\().4s, v\s3\().4s
.endm
/*
* void sha2_ce_transform(struct sha256_ce_state *sst, u8 const *src,
* int blocks)
*/
FUNC sha256_ce_transform , :
/* load round constants */
adr x8, .Lsha2_rcon
ld1 { v0.4s- v3.4s}, [x8], #64
ld1 { v4.4s- v7.4s}, [x8], #64
ld1 { v8.4s-v11.4s}, [x8], #64
ld1 {v12.4s-v15.4s}, [x8]
/* load state */
mov x9, x0
ld1 {dgav.4s}, [x9], #16
ld1 {dgbv.4s}, [x9]
/* load input */
0: ld1 {v16.16b-v19.16b}, [x1], #64
sub w2, w2, #1
rev32 v16.16b, v16.16b
rev32 v17.16b, v17.16b
rev32 v18.16b, v18.16b
rev32 v19.16b, v19.16b
1: add t0.4s, v16.4s, v0.4s
mov dg0v.16b, dgav.16b
mov dg1v.16b, dgbv.16b
add_update 0, v1, 16, 17, 18, 19
add_update 1, v2, 17, 18, 19, 16
add_update 0, v3, 18, 19, 16, 17
add_update 1, v4, 19, 16, 17, 18
add_update 0, v5, 16, 17, 18, 19
add_update 1, v6, 17, 18, 19, 16
add_update 0, v7, 18, 19, 16, 17
add_update 1, v8, 19, 16, 17, 18
add_update 0, v9, 16, 17, 18, 19
add_update 1, v10, 17, 18, 19, 16
add_update 0, v11, 18, 19, 16, 17
add_update 1, v12, 19, 16, 17, 18
add_only 0, v13, 17
add_only 1, v14, 18
add_only 0, v15, 19
add_only 1
/* update state */
add dgav.4s, dgav.4s, dg0v.4s
add dgbv.4s, dgbv.4s, dg1v.4s
/* handled all input blocks? */
cbnz w2, 0b
/* store new state */
3: mov x9, x0
st1 {dgav.16b}, [x9], #16
st1 {dgbv.16b}, [x9]
ret
/*
* The SHA-256 round constants
*/
.align 4
.Lsha2_rcon:
.word 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5
.word 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5
.word 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3
.word 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174
.word 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc
.word 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da
.word 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7
.word 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967
.word 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13
.word 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85
.word 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3
.word 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070
.word 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5
.word 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3
.word 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208
.word 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
END_FUNC sha256_ce_transform
BTI(emit_aarch64_feature_1_and GNU_PROPERTY_AARCH64_FEATURE_1_BTI)