| Message ID | 3e443f7a245229a2752fcf21dfed10998847e345.1507010612.git.harsh@chelsio.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Herbert Xu |
| Headers | show |
From: Harsh Jain > Sent: 03 October 2017 07:46 > It multiply GF(2^128) elements in the ble format. > It will be used by chelsio driver to fasten gf multiplication. ^ speed up ?? David
On 03-10-2017 20:28, David Laight wrote: > From: Harsh Jain >> Sent: 03 October 2017 07:46 >> It multiply GF(2^128) elements in the ble format. >> It will be used by chelsio driver to fasten gf multiplication. > ^ speed up ?? It should be speed up. Will fix the same in V2. Thanks > > David >
diff --git a/crypto/gf128mul.c b/crypto/gf128mul.c index dc01212..24e6019 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]; diff --git a/include/crypto/gf128mul.h b/include/crypto/gf128mul.h index 0977fb1..fa0a63d 100644 --- a/include/crypto/gf128mul.h +++ b/include/crypto/gf128mul.h @@ -227,7 +227,7 @@ struct gf128mul_4k *gf128mul_init_4k_lle(const be128 *g); struct gf128mul_4k *gf128mul_init_4k_bbe(const be128 *g); void gf128mul_4k_lle(be128 *a, const struct gf128mul_4k *t); void gf128mul_4k_bbe(be128 *a, const struct gf128mul_4k *t); - +void gf128mul_x8_ble(le128 *r, const le128 *x); static inline void gf128mul_free_4k(struct gf128mul_4k *t) { kzfree(t);
It multiply GF(2^128) elements in the ble format. It will be used by chelsio driver to fasten gf multiplication. Signed-off-by: Harsh Jain <harsh@chelsio.com> --- crypto/gf128mul.c | 13 +++++++++++++ include/crypto/gf128mul.h | 2 +- 2 files changed, 14 insertions(+), 1 deletion(-)