From 822c9e935a25a7590cd99b4c5407bb6596be41b7 Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Wed, 4 Dec 2013 18:22:33 +0100 Subject: Change xor and xor_a back to work on pointers For some reason, this makes GCC generate much better code on MIPS with -Os --- src/crypto/mac/ghash/builtin/ghash_builtin.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) (limited to 'src/crypto/mac') diff --git a/src/crypto/mac/ghash/builtin/ghash_builtin.c b/src/crypto/mac/ghash/builtin/ghash_builtin.c index c518663..651c7ed 100644 --- a/src/crypto/mac/ghash/builtin/ghash_builtin.c +++ b/src/crypto/mac/ghash/builtin/ghash_builtin.c @@ -35,13 +35,13 @@ struct fastd_mac_state { static const fastd_block128_t r = { .b = {0xe1} }; -static inline uint8_t shr(fastd_block128_t *out, fastd_block128_t in, int n) { +static inline uint8_t shr(fastd_block128_t *out, const fastd_block128_t *in, int n) { size_t i; uint8_t c = 0; for (i = 0; i < sizeof(fastd_block128_t); i++) { - uint8_t c2 = in.b[i] << (8-n); - out->b[i] = (in.b[i] >> n) | c; + uint8_t c2 = in->b[i] << (8-n); + out->b[i] = (in->b[i] >> n) | c; c = c2; } @@ -53,8 +53,8 @@ static inline void mulH_a(fastd_block128_t *x, const fastd_mac_state_t *cstate) int i; for (i = 0; i < 16; i++) { - xor_a(&out, cstate->H[2*i][x->b[i]>>4]); - xor_a(&out, cstate->H[2*i+1][x->b[i]&0xf]); + xor_a(&out, &cstate->H[2*i][x->b[i]>>4]); + xor_a(&out, &cstate->H[2*i+1][x->b[i]&0xf]); } *x = out; @@ -74,11 +74,11 @@ static fastd_mac_state_t* ghash_init(const uint8_t *key) { int i; for (i = 1; i < 4; i++) { - uint8_t carry = shr(&Hbase[i], Hbase[i-1], 1); + uint8_t carry = shr(&Hbase[i], &Hbase[i-1], 1); if (carry) - xor_a(&Hbase[i], r); + xor_a(&Hbase[i], &r); - shr(&Rbase[i], Rbase[i-1], 1); + shr(&Rbase[i], &Rbase[i-1], 1); } fastd_block128_t R[16]; @@ -89,8 +89,8 @@ static fastd_mac_state_t* ghash_init(const uint8_t *key) { int j; for (j = 0; j < 4; j++) { if (i & (8 >> j)) { - xor_a(&state->H[0][i], Hbase[j]); - xor_a(&R[i], Rbase[j]); + xor_a(&state->H[0][i], &Hbase[j]); + xor_a(&R[i], &Rbase[j]); } } } @@ -99,8 +99,8 @@ static fastd_mac_state_t* ghash_init(const uint8_t *key) { int j; for (j = 0; j < 16; j++) { - uint8_t carry = shr(&state->H[i][j], state->H[i-1][j], 4); - xor_a(&state->H[i][j], R[carry]); + uint8_t carry = shr(&state->H[i][j], &state->H[i-1][j], 4); + xor_a(&state->H[i][j], &R[carry]); } } @@ -112,7 +112,7 @@ static bool ghash_hash(const fastd_mac_state_t *state, fastd_block128_t *out, co size_t i; for (i = 0; i < n_blocks; i++) { - xor_a(out, in[i]); + xor_a(out, &in[i]); mulH_a(out, state); } -- cgit v1.2.3