Commit e53b43d8 authored Sep 03, 2019 by Ard Biesheuvel Committed by Herbert Xu Sep 09, 2019

crypto: arm/aes-ce - replace tweak mask literal with composition



Replace the vector load from memory sequence with a simple instruction
sequence to compose the tweak vector directly.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent 1dede02b

arch/arm/crypto/aes-ce-core.S

+3 −6

Original line number	Diff line number	Diff line
		@@ -382,13 +382,10 @@ ENDPROC(ce_aes_ctr_encrypt)
		veor \out, \out, \tmp
		.endm

		.align 3
		.Lxts_mul_x:
		.quad 1, 0x87

		ce_aes_xts_init:
		vldr d30, .Lxts_mul_x
		vldr d31, .Lxts_mul_x + 8
		vmov.i32 d30, #0x87 @ compose tweak mask vector
		vmovl.u32 q15, d30
		vshr.u64 d30, d31, #7

		ldrd r4, r5, [sp, #16] @ load args
		ldr r6, [sp, #28]

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