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[Qemu-ppc] [PATCH] target-ppc: simplify AES emulation
From: |
Aurelien Jarno |
Subject: |
[Qemu-ppc] [PATCH] target-ppc: simplify AES emulation |
Date: |
Mon, 27 Oct 2014 17:25:52 +0100 |
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 <address@hidden>
Cc: Paolo Bonzini <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
target-ppc/int_helper.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Note: This has been requested by Paolo Bonzini, but I have no way to
test it, so it is only compile tested.
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 713d777..e67a5ee 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -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])]);
}
}
--
2.1.1
- [Qemu-ppc] [PATCH] target-ppc: simplify AES emulation,
Aurelien Jarno <=