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author | Harsh Jain <harsh@chelsio.com> | 2017-10-08 13:37:20 +0530 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-11-03 21:50:43 +0800 |
commit | c24c32f012ac16df4edb67aa4bd620494e49c3de (patch) | |
tree | 502472ae8250a0a9c8849db4dedd71fdfaa81b8d /crypto/gf128mul.c | |
parent | c0bf056e88a1e1e559159aef68d373b221bc1777 (diff) | |
download | linux-crypto-c24c32f012ac16df4edb67aa4bd620494e49c3de.tar.gz linux-crypto-c24c32f012ac16df4edb67aa4bd620494e49c3de.zip |
crypto: gf128mul - The x8_ble multiplication functions
It multiply GF(2^128) elements in the ble format.
It will be used by chelsio driver to speed up gf multiplication.
Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/gf128mul.c')
-rw-r--r-- | crypto/gf128mul.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/crypto/gf128mul.c b/crypto/gf128mul.c index dc012129..24e60195 100644 --- a/crypto/gf128mul.c +++ b/crypto/gf128mul.c @@ -156,6 +156,19 @@ static void gf128mul_x8_bbe(be128 *x) x->b = cpu_to_be64((b << 8) ^ _tt); } +void gf128mul_x8_ble(le128 *r, const le128 *x) +{ + u64 a = le64_to_cpu(x->a); + u64 b = le64_to_cpu(x->b); + + /* equivalent to gf128mul_table_be[b >> 63] (see crypto/gf128mul.c): */ + u64 _tt = gf128mul_table_be[a >> 56]; + + r->a = cpu_to_le64((a << 8) | (b >> 56)); + r->b = cpu_to_le64((b << 8) ^ _tt); +} +EXPORT_SYMBOL(gf128mul_x8_ble); + void gf128mul_lle(be128 *r, const be128 *b) { be128 p[8]; |