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target-ppc: simplify AES emulation 

This patch simplifies the AES code, by directly accessing the newly added
S-Box, InvS-Box tables instead of recreating them by using the AES_Te and
AES_Td tables.

Cc: Alexander Graf <agraf@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Aurelien Jarno 2014-10-27 17:25:52 +01:00 committed by Alexander Graf
parent fdfb7f2cdb
commit 36cbde7c30
1 changed files with 2 additions and 2 deletions
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4
target-ppc/int_helper.c
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@ -2352,7 +2352,7 @@ void helper_vcipherlast(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
int i;
VECTOR_FOR_INORDER_I(i, u8) {
r->AVRB(i) = b->AVRB(i) ^ (AES_Te4[a->AVRB(AES_shifts[i])] & 0xFF);
r->AVRB(i) = b->AVRB(i) ^ (AES_sbox[a->AVRB(AES_shifts[i])]);
}
}
@ -2381,7 +2381,7 @@ void helper_vncipherlast(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
int i;
VECTOR_FOR_INORDER_I(i, u8) {
r->AVRB(i) = b->AVRB(i) ^ (AES_Td4[a->AVRB(AES_ishifts[i])] & 0xFF);
r->AVRB(i) = b->AVRB(i) ^ (AES_isbox[a->AVRB(AES_ishifts[i])]);
}
}