Commit acfc5878 authored by Harsh Jain's avatar Harsh Jain Committed by Herbert Xu
Browse files

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: default avatarHarsh Jain <harsh@chelsio.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 40cdbe1a

crypto/gf128mul.c

+13 −0
Original line number Diff line number Diff line
@@ -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];

include/crypto/gf128mul.h

+1 −1
Original line number Diff line number Diff line
@@ -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);