crypto: arm/aes-neonbs - replace tweak mask literal with composition (38e73b3d) · Commits · 戴 / test

Replace the vector load from memory sequence with a simple instruction sequence to compose the tweak vector directly. Signed-off-by:

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

+3 −5

Original line number	Diff line number	Diff line
		@@ -887,10 +887,6 @@ ENDPROC(aesbs_ctr_encrypt)
		veor \out, \out, \tmp
		.endm

		.align 4
		.Lxts_mul_x:
		.quad 1, 0x87

		/*
		* aesbs_xts_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
		* int blocks, u8 iv[])
		@@ -899,7 +895,9 @@ ENDPROC(aesbs_ctr_encrypt)
		*/
		__xts_prepare8:
		vld1.8 {q14}, [r7] // load iv
		__ldr q15, .Lxts_mul_x // load tweak mask
		vmov.i32 d30, #0x87 // compose tweak mask vector
		vmovl.u32 q15, d30
		vshr.u64 d30, d31, #7
		vmov q12, q14

		__adr ip, 0f