linux/arch/mips/crypto
Jason A. Donenfeld 31899908a0 crypto: {arm,arm64,mips}/poly1305 - remove redundant non-reduction from emit
This appears to be some kind of copy and paste error, and is actually
dead code.

Pre: f = 0 ⇒ (f >> 32) = 0
    f = (f >> 32) + le32_to_cpu(digest[0]);
Post: 0 ≤ f < 2³²
    put_unaligned_le32(f, dst);

Pre: 0 ≤ f < 2³² ⇒ (f >> 32) = 0
    f = (f >> 32) + le32_to_cpu(digest[1]);
Post: 0 ≤ f < 2³²
    put_unaligned_le32(f, dst + 4);

Pre: 0 ≤ f < 2³² ⇒ (f >> 32) = 0
    f = (f >> 32) + le32_to_cpu(digest[2]);
Post: 0 ≤ f < 2³²
    put_unaligned_le32(f, dst + 8);

Pre: 0 ≤ f < 2³² ⇒ (f >> 32) = 0
    f = (f >> 32) + le32_to_cpu(digest[3]);
Post: 0 ≤ f < 2³²
    put_unaligned_le32(f, dst + 12);

Therefore this sequence is redundant. And Andy's code appears to handle
misalignment acceptably.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-01-16 15:18:12 +08:00
..
chacha-core.S crypto: mips/chacha - wire up accelerated 32r2 code from Zinc 2019-11-17 09:02:40 +08:00
chacha-glue.c crypto: arch - conditionalize crypto api in arch glue for lib code 2019-11-27 13:08:49 +08:00
crc32-mips.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
Makefile crypto: mips/poly1305 - incorporate OpenSSL/CRYPTOGAMS optimized implementation 2019-11-17 09:02:42 +08:00
poly1305-glue.c crypto: {arm,arm64,mips}/poly1305 - remove redundant non-reduction from emit 2020-01-16 15:18:12 +08:00
poly1305-mips.pl crypto: mips/poly1305 - incorporate OpenSSL/CRYPTOGAMS optimized implementation 2019-11-17 09:02:42 +08:00