85 lines
1.7 KiB
ArmAsm
85 lines
1.7 KiB
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2013 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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.arch armv8-a+crypto
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SYM_FUNC_START(__aes_ce_encrypt)
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sub w3, w3, #2
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ld1 {v0.16b}, [x2]
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ld1 {v1.4s}, [x0], #16
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cmp w3, #10
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bmi 0f
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bne 3f
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mov v3.16b, v1.16b
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b 2f
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0: mov v2.16b, v1.16b
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ld1 {v3.4s}, [x0], #16
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1: aese v0.16b, v2.16b
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aesmc v0.16b, v0.16b
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2: ld1 {v1.4s}, [x0], #16
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aese v0.16b, v3.16b
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aesmc v0.16b, v0.16b
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3: ld1 {v2.4s}, [x0], #16
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subs w3, w3, #3
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aese v0.16b, v1.16b
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aesmc v0.16b, v0.16b
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ld1 {v3.4s}, [x0], #16
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bpl 1b
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aese v0.16b, v2.16b
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eor v0.16b, v0.16b, v3.16b
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st1 {v0.16b}, [x1]
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ret
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SYM_FUNC_END(__aes_ce_encrypt)
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SYM_FUNC_START(__aes_ce_decrypt)
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sub w3, w3, #2
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ld1 {v0.16b}, [x2]
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ld1 {v1.4s}, [x0], #16
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cmp w3, #10
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bmi 0f
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bne 3f
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mov v3.16b, v1.16b
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b 2f
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0: mov v2.16b, v1.16b
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ld1 {v3.4s}, [x0], #16
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1: aesd v0.16b, v2.16b
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aesimc v0.16b, v0.16b
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2: ld1 {v1.4s}, [x0], #16
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aesd v0.16b, v3.16b
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aesimc v0.16b, v0.16b
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3: ld1 {v2.4s}, [x0], #16
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subs w3, w3, #3
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aesd v0.16b, v1.16b
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aesimc v0.16b, v0.16b
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ld1 {v3.4s}, [x0], #16
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bpl 1b
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aesd v0.16b, v2.16b
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eor v0.16b, v0.16b, v3.16b
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st1 {v0.16b}, [x1]
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ret
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SYM_FUNC_END(__aes_ce_decrypt)
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/*
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* __aes_ce_sub() - use the aese instruction to perform the AES sbox
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* substitution on each byte in 'input'
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*/
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SYM_FUNC_START(__aes_ce_sub)
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dup v1.4s, w0
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movi v0.16b, #0
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aese v0.16b, v1.16b
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umov w0, v0.s[0]
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ret
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SYM_FUNC_END(__aes_ce_sub)
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SYM_FUNC_START(__aes_ce_invert)
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ld1 {v0.4s}, [x1]
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aesimc v1.16b, v0.16b
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st1 {v1.4s}, [x0]
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ret
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SYM_FUNC_END(__aes_ce_invert)
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