| Message ID | 20190903164339.27984-10-ard.biesheuvel@linaro.org |
|---|---|
| State | Accepted |
| Commit | 0cfd507c83469b07f037100a6389b02ce99b546f |
| Headers | show
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| Series |
crypto: arm/aes - XTS ciphertext stealing and other updates
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expand
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diff --git a/arch/arm64/crypto/aes-modes.S b/arch/arm64/crypto/aes-modes.S index 2879f030a749..38cd5a2091a8 100644 --- a/arch/arm64/crypto/aes-modes.S +++ b/arch/arm64/crypto/aes-modes.S @@ -293,12 +293,11 @@ AES_ENTRY(aes_cbc_cts_decrypt) ld1 {v5.16b}, [x5] /* get iv */ dec_prepare w3, x2, x6 - tbl v2.16b, {v1.16b}, v4.16b decrypt_block v0, w3, x2, x6, w7 - eor v2.16b, v2.16b, v0.16b + tbl v2.16b, {v0.16b}, v3.16b + eor v2.16b, v2.16b, v1.16b tbx v0.16b, {v1.16b}, v4.16b - tbl v2.16b, {v2.16b}, v3.16b decrypt_block v0, w3, x2, x6, w7 eor v0.16b, v0.16b, v5.16b /* xor with iv */
Optimize away one of the tbl instructions in the decryption path, which turns out to be unnecessary. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> --- arch/arm64/crypto/aes-modes.S | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) -- 2.17.1