From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Tue, 3 Sep 2019 16:43:26 +0000 (-0700)
Subject: crypto: arm/aes-ce - replace tweak mask literal with composition
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e53b43d8d41f6c9bab8b4db73e64bc23c8063795;p=openwrt%2Fstaging%2Fblogic.git

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>
---

diff --git a/arch/arm/crypto/aes-ce-core.S b/arch/arm/crypto/aes-ce-core.S
index a3ca4ac2d7bb..bb6ec1844370 100644
--- a/arch/arm/crypto/aes-ce-core.S
+++ b/arch/arm/crypto/aes-ce-core.S
@@ -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]