By using the unaligned access helpers, we drastically improve
performance on small MIPS routers that have to go through the exception
fix-up handler for these unaligned accesses.

Signed-off-by: Jason A. Donenfeld <ja...@zx2c4.com>
---
 crypto/poly1305_generic.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/crypto/poly1305_generic.c b/crypto/poly1305_generic.c
index 2df9835d..0b86f4e 100644
--- a/crypto/poly1305_generic.c
+++ b/crypto/poly1305_generic.c
@@ -66,9 +66,9 @@ static void poly1305_setrkey(struct poly1305_desc_ctx *dctx, 
const u8 *key)
 {
        /* r &= 0xffffffc0ffffffc0ffffffc0fffffff */
        dctx->r[0] = (le32_to_cpuvp(key +  0) >> 0) & 0x3ffffff;
-       dctx->r[1] = (le32_to_cpuvp(key +  3) >> 2) & 0x3ffff03;
-       dctx->r[2] = (le32_to_cpuvp(key +  6) >> 4) & 0x3ffc0ff;
-       dctx->r[3] = (le32_to_cpuvp(key +  9) >> 6) & 0x3f03fff;
+       dctx->r[1] = (get_unaligned_le32(key +  3) >> 2) & 0x3ffff03;
+       dctx->r[2] = (get_unaligned_le32(key +  6) >> 4) & 0x3ffc0ff;
+       dctx->r[3] = (get_unaligned_le32(key +  9) >> 6) & 0x3f03fff;
        dctx->r[4] = (le32_to_cpuvp(key + 12) >> 8) & 0x00fffff;
 }
 
@@ -138,9 +138,9 @@ static unsigned int poly1305_blocks(struct 
poly1305_desc_ctx *dctx,
 
                /* h += m[i] */
                h0 += (le32_to_cpuvp(src +  0) >> 0) & 0x3ffffff;
-               h1 += (le32_to_cpuvp(src +  3) >> 2) & 0x3ffffff;
-               h2 += (le32_to_cpuvp(src +  6) >> 4) & 0x3ffffff;
-               h3 += (le32_to_cpuvp(src +  9) >> 6) & 0x3ffffff;
+               h1 += (get_unaligned_le32(src +  3) >> 2) & 0x3ffffff;
+               h2 += (get_unaligned_le32(src +  6) >> 4) & 0x3ffffff;
+               h3 += (get_unaligned_le32(src +  9) >> 6) & 0x3ffffff;
                h4 += (le32_to_cpuvp(src + 12) >> 8) | hibit;
 
                /* h *= r */
-- 
2.10.2

--
To unsubscribe from this list: send the line "unsubscribe linux-crypto" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to