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/* SPDX-License-Identifier: GPL-2.0 */
/*
* sha3-ce-core.S - core SHA-3 transform using v8.2 Crypto Extensions
*
* Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
.irp b,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
.set .Lv\b\().2d, \b
.set .Lv\b\().16b, \b
.endr
/*
* ARMv8.2 Crypto Extensions instructions
*/
.macro eor3, rd, rn, rm, ra
.inst 0xce000000 | .L\rd | (.L\rn << 5) | (.L\ra << 10) | (.L\rm << 16)
.endm
.macro rax1, rd, rn, rm
.inst 0xce608c00 | .L\rd | (.L\rn << 5) | (.L\rm << 16)
.endm
.macro bcax, rd, rn, rm, ra
.inst 0xce200000 | .L\rd | (.L\rn << 5) | (.L\ra << 10) | (.L\rm << 16)
.endm
.macro xar, rd, rn, rm, imm6
.inst 0xce800000 | .L\rd | (.L\rn << 5) | ((\imm6) << 10) | (.L\rm << 16)
.endm
/*
* int sha3_ce_transform(u64 *st, const u8 *data, int blocks, int dg_size)
*/
.text
SYM_FUNC_START(sha3_ce_transform)
/* load state */
add x8, x0, #32
ld1 { v0.1d- v3.1d}, [x0]
ld1 { v4.1d- v7.1d}, [x8], #32
ld1 { v8.1d-v11.1d}, [x8], #32
ld1 {v12.1d-v15.1d}, [x8], #32
ld1 {v16.1d-v19.1d}, [x8], #32
ld1 {v20.1d-v23.1d}, [x8], #32
ld1 {v24.1d}, [x8]
0: sub w2, w2, #1
mov w8, #24
adr_l x9, .Lsha3_rcon
/* load input */
ld1 {v25.8b-v28.8b}, [x1], #32
ld1 {v29.8b-v31.8b}, [x1], #24
eor v0.8b, v0.8b, v25.8b
eor v1.8b, v1.8b, v26.8b
eor v2.8b, v2.8b, v27.8b
eor v3.8b, v3.8b, v28.8b
eor v4.8b, v4.8b, v29.8b
eor v5.8b, v5.8b, v30.8b
eor v6.8b, v6.8b, v31.8b
tbnz x3, #6, 2f // SHA3-512
ld1 {v25.8b-v28.8b}, [x1], #32
ld1 {v29.8b-v30.8b}, [x1], #16
eor v7.8b, v7.8b, v25.8b
eor v8.8b, v8.8b, v26.8b
eor v9.8b, v9.8b, v27.8b
eor v10.8b, v10.8b, v28.8b
eor v11.8b, v11.8b, v29.8b
eor v12.8b, v12.8b, v30.8b
tbnz x3, #4, 1f // SHA3-384 or SHA3-224
// SHA3-256
ld1 {v25.8b-v28.8b}, [x1], #32
eor v13.8b, v13.8b, v25.8b
eor v14.8b, v14.8b, v26.8b
eor v15.8b, v15.8b, v27.8b
eor v16.8b, v16.8b, v28.8b
b 3f
1: tbz x3, #2, 3f // bit 2 cleared? SHA-384
// SHA3-224
ld1 {v25.8b-v28.8b}, [x1], #32
ld1 {v29.8b}, [x1], #8
eor v13.8b, v13.8b, v25.8b
eor v14.8b, v14.8b, v26.8b
eor v15.8b, v15.8b, v27.8b
eor v16.8b, v16.8b, v28.8b
eor v17.8b, v17.8b, v29.8b
b 3f
// SHA3-512
2: ld1 {v25.8b-v26.8b}, [x1], #16
eor v7.8b, v7.8b, v25.8b
eor v8.8b, v8.8b, v26.8b
3: sub w8, w8, #1
eor3 v29.16b, v4.16b, v9.16b, v14.16b
eor3 v26.16b, v1.16b, v6.16b, v11.16b
eor3 v28.16b, v3.16b, v8.16b, v13.16b
eor3 v25.16b, v0.16b, v5.16b, v10.16b
eor3 v27.16b, v2.16b, v7.16b, v12.16b
eor3 v29.16b, v29.16b, v19.16b, v24.16b
eor3 v26.16b, v26.16b, v16.16b, v21.16b
eor3 v28.16b, v28.16b, v18.16b, v23.16b
eor3 v25.16b, v25.16b, v15.16b, v20.16b
eor3 v27.16b, v27.16b, v17.16b, v22.16b
rax1 v30.2d, v29.2d, v26.2d // bc[0]
rax1 v26.2d, v26.2d, v28.2d // bc[2]
rax1 v28.2d, v28.2d, v25.2d // bc[4]
rax1 v25.2d, v25.2d, v27.2d // bc[1]
rax1 v27.2d, v27.2d, v29.2d // bc[3]
eor v0.16b, v0.16b, v30.16b
xar v29.2d, v1.2d, v25.2d, (64 - 1)
xar v1.2d, v6.2d, v25.2d, (64 - 44)
xar v6.2d, v9.2d, v28.2d, (64 - 20)
xar v9.2d, v22.2d, v26.2d, (64 - 61)
xar v22.2d, v14.2d, v28.2d, (64 - 39)
xar v14.2d, v20.2d, v30.2d, (64 - 18)
xar v31.2d, v2.2d, v26.2d, (64 - 62)
xar v2.2d, v12.2d, v26.2d, (64 - 43)
xar v12.2d, v13.2d, v27.2d, (64 - 25)
xar v13.2d, v19.2d, v28.2d, (64 - 8)
xar v19.2d, v23.2d, v27.2d, (64 - 56)
xar v23.2d, v15.2d, v30.2d, (64 - 41)
xar v15.2d, v4.2d, v28.2d, (64 - 27)
xar v28.2d, v24.2d, v28.2d, (64 - 14)
xar v24.2d, v21.2d, v25.2d, (64 - 2)
xar v8.2d, v8.2d, v27.2d, (64 - 55)
xar v4.2d, v16.2d, v25.2d, (64 - 45)
xar v16.2d, v5.2d, v30.2d, (64 - 36)
xar v5.2d, v3.2d, v27.2d, (64 - 28)
xar v27.2d, v18.2d, v27.2d, (64 - 21)
xar v3.2d, v17.2d, v26.2d, (64 - 15)
xar v25.2d, v11.2d, v25.2d, (64 - 10)
xar v26.2d, v7.2d, v26.2d, (64 - 6)
xar v30.2d, v10.2d, v30.2d, (64 - 3)
bcax v20.16b, v31.16b, v22.16b, v8.16b
bcax v21.16b, v8.16b, v23.16b, v22.16b
bcax v22.16b, v22.16b, v24.16b, v23.16b
bcax v23.16b, v23.16b, v31.16b, v24.16b
bcax v24.16b, v24.16b, v8.16b, v31.16b
ld1r {v31.2d}, [x9], #8
bcax v17.16b, v25.16b, v19.16b, v3.16b
bcax v18.16b, v3.16b, v15.16b, v19.16b
bcax v19.16b, v19.16b, v16.16b, v15.16b
bcax v15.16b, v15.16b, v25.16b, v16.16b
bcax v16.16b, v16.16b, v3.16b, v25.16b
bcax v10.16b, v29.16b, v12.16b, v26.16b
bcax v11.16b, v26.16b, v13.16b, v12.16b
bcax v12.16b, v12.16b, v14.16b, v13.16b
bcax v13.16b, v13.16b, v29.16b, v14.16b
bcax v14.16b, v14.16b, v26.16b, v29.16b
bcax v7.16b, v30.16b, v9.16b, v4.16b
bcax v8.16b, v4.16b, v5.16b, v9.16b
bcax v9.16b, v9.16b, v6.16b, v5.16b
bcax v5.16b, v5.16b, v30.16b, v6.16b
bcax v6.16b, v6.16b, v4.16b, v30.16b
bcax v3.16b, v27.16b, v0.16b, v28.16b
bcax v4.16b, v28.16b, v1.16b, v0.16b
bcax v0.16b, v0.16b, v2.16b, v1.16b
bcax v1.16b, v1.16b, v27.16b, v2.16b
bcax v2.16b, v2.16b, v28.16b, v27.16b
eor v0.16b, v0.16b, v31.16b
cbnz w8, 3b
cond_yield 3f, x8
cbnz w2, 0b
/* save state */
3: st1 { v0.1d- v3.1d}, [x0], #32
st1 { v4.1d- v7.1d}, [x0], #32
st1 { v8.1d-v11.1d}, [x0], #32
st1 {v12.1d-v15.1d}, [x0], #32
st1 {v16.1d-v19.1d}, [x0], #32
st1 {v20.1d-v23.1d}, [x0], #32
st1 {v24.1d}, [x0]
mov w0, w2
ret
SYM_FUNC_END(sha3_ce_transform)
.section ".rodata", "a"
.align 8
.Lsha3_rcon:
.quad 0x0000000000000001, 0x0000000000008082, 0x800000000000808a
.quad 0x8000000080008000, 0x000000000000808b, 0x0000000080000001
.quad 0x8000000080008081, 0x8000000000008009, 0x000000000000008a
.quad 0x0000000000000088, 0x0000000080008009, 0x000000008000000a
.quad 0x000000008000808b, 0x800000000000008b, 0x8000000000008089
.quad 0x8000000000008003, 0x8000000000008002, 0x8000000000000080
.quad 0x000000000000800a, 0x800000008000000a, 0x8000000080008081
.quad 0x8000000000008080, 0x0000000080000001, 0x8000000080008008
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