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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>
This commit is contained in:
Ard Biesheuvel 2019-09-03 09:43:26 -07:00 committed by Herbert Xu
parent 1dede02bdd
commit e53b43d8d4
1 changed files with 3 additions and 6 deletions
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9
arch/arm/crypto/aes-ce-core.S
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@ -382,13 +382,10 @@ ENDPROC(ce_aes_ctr_encrypt)
veor \out, \out, \tmp veor \out, \out, \tmp
.endm .endm
.align 3
.Lxts_mul_x:
.quad 1, 0x87
ce_aes_xts_init: ce_aes_xts_init:
vldr d30, .Lxts_mul_x vmov.i32 d30, #0x87 @ compose tweak mask vector
vldr d31, .Lxts_mul_x + 8 vmovl.u32 q15, d30
vshr.u64 d30, d31, #7
ldrd r4, r5, [sp, #16] @ load args ldrd r4, r5, [sp, #16] @ load args
ldr r6, [sp, #28] ldr r6, [sp, #28]