diff options
| author | Aurelien Jarno <aurelien@aurel32.net> | 2014-06-21 00:48:09 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-12-15 12:21:01 +0100 |
| commit | 9551ea6991cfb7c777f7943ad69b30d0a4fadac3 (patch) | |
| tree | 5e606a993d47f2f5444868c70806c721940a6689 | |
| parent | 5eba5a6632ff4b0aaa8cb6c806fa95758518a28d (diff) | |
target-i386: simplify AES emulation
This patch simplifies the AES code, by directly accessing the newly added
S-Box, InvS-Box and InvMixColumns tables instead of recreating them by
using the AES_Te and AES_Td tables.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | target-i386/ops_sse.h | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/target-i386/ops_sse.h b/target-i386/ops_sse.h index 886e0a8243..0765073792 100644 --- a/target-i386/ops_sse.h +++ b/target-i386/ops_sse.h @@ -2228,7 +2228,7 @@ void glue(helper_aesdeclast, SUFFIX)(CPUX86State *env, Reg *d, Reg *s) Reg rk = *s; for (i = 0; i < 16; i++) { - d->B(i) = rk.B(i) ^ (AES_Td4[st.B(AES_ishifts[i])] & 0xff); + d->B(i) = rk.B(i) ^ (AES_isbox[st.B(AES_ishifts[i])]); } } @@ -2253,7 +2253,7 @@ void glue(helper_aesenclast, SUFFIX)(CPUX86State *env, Reg *d, Reg *s) Reg rk = *s; for (i = 0; i < 16; i++) { - d->B(i) = rk.B(i) ^ (AES_Te4[st.B(AES_shifts[i])] & 0xff); + d->B(i) = rk.B(i) ^ (AES_sbox[st.B(AES_shifts[i])]); } } @@ -2264,10 +2264,10 @@ void glue(helper_aesimc, SUFFIX)(CPUX86State *env, Reg *d, Reg *s) Reg tmp = *s; for (i = 0 ; i < 4 ; i++) { - d->L(i) = bswap32(AES_Td0[AES_Te4[tmp.B(4*i+0)] & 0xff] ^ - AES_Td1[AES_Te4[tmp.B(4*i+1)] & 0xff] ^ - AES_Td2[AES_Te4[tmp.B(4*i+2)] & 0xff] ^ - AES_Td3[AES_Te4[tmp.B(4*i+3)] & 0xff]); + d->L(i) = bswap32(AES_imc[tmp.B(4*i+0)][0] ^ + AES_imc[tmp.B(4*i+1)][1] ^ + AES_imc[tmp.B(4*i+2)][2] ^ + AES_imc[tmp.B(4*i+3)][3]); } } @@ -2278,8 +2278,8 @@ void glue(helper_aeskeygenassist, SUFFIX)(CPUX86State *env, Reg *d, Reg *s, Reg tmp = *s; for (i = 0 ; i < 4 ; i++) { - d->B(i) = AES_Te4[tmp.B(i + 4)] & 0xff; - d->B(i + 8) = AES_Te4[tmp.B(i + 12)] & 0xff; + d->B(i) = AES_sbox[tmp.B(i + 4)]; + d->B(i + 8) = AES_sbox[tmp.B(i + 12)]; } d->L(1) = (d->L(0) << 24 | d->L(0) >> 8) ^ ctrl; d->L(3) = (d->L(2) << 24 | d->L(2) >> 8) ^ ctrl; |