From a06b715eccea6dcf6d6c175986c1c25c9d66438a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Niels=20M=C3=B6ller?= <nisse@lysator.liu.se> Date: Mon, 25 Feb 2002 16:45:59 +0100 Subject: [PATCH] (_aes_crypt): Deleted idx register. Further cleanup. Rev: src/nettle/sparc/aes.asm:1.65 --- sparc/aes.asm | 29 ++++++++++------------------- 1 file changed, 10 insertions(+), 19 deletions(-) diff --git a/sparc/aes.asm b/sparc/aes.asm index 0df565ca..e49a195d 100644 --- a/sparc/aes.asm +++ b/sparc/aes.asm @@ -106,7 +106,6 @@ _aes_crypt: .Lround_loop: ! 4*i mov 0, i - ! add T, AES_SIDX3, idx .Linner_loop: ! The comments mark which j in T->table[j][ Bj(wtxt[IDXi(i)]) ] ! the instruction is a part of. @@ -114,68 +113,60 @@ _aes_crypt: ! The code uses the register %o[j], aka tj, as the primary ! register for that sub-expression. True for j==1,3. - ! AES_SIDX1 ld [IDX1+i], t1 ! 1 - ! AES_SIDX2 + ! IDX2(j) = j XOR 2 xor i, 8, t2 - ! wtxt[IDX1...] add wtxt, t1, t1 ! 1 ldub [t1+2], t1 ! 1 - - ! AES_SIDX3 ld [IDX3+i], t3 ! 3 + sll t1, 2, t1 ! 1 - ! wtxt[i] ld [wtxt+i], t0 ! 0 - ! wtxt[IDX2...] lduh [wtxt+t2], t2 ! 2 - and t0, 255, t0 ! 0 - ! wtxt[IDX3...] + ldub [wtxt+t3], t3 ! 3 sll t0, 2, t0 ! 0 ld [T0+t0], t0 ! 0 - and t2, 255, t2 ! 2 + ld [T1+t1], t1 ! 1 sll t2, 2, t2 ! 2 ld [T2+t2], t2 ! 2 - sll t3, 2, t3 ! 3 + ld [T3+t3], t3 ! 3 xor t0, t1, t0 ! 0, 1 xor t0, t2, t0 ! 0, 1, 2 - - ! add idx, 4, idx ! Fetch roundkey ld [key+i], t1 + xor t0, t3, t0 ! 0, 1, 2, 3 xor t0, t1, t0 - st t0, [tmp+i] cmp i, 8 + bleu .Linner_loop add i, 4, i - ! switch roles for tmp and wtxt xor wtxt, diff, wtxt subcc round, 1, round + add key, 16, key nop - bne .Lround_loop xor tmp, diff, tmp ! final round ! 4*i mov 0, i - ! SIDX3 - ! add T, AES_SIDX3, idx + .Lfinal_loop: ! Comments mark which j in T->sbox[Bj(wtxt[IDXj(i)])] ! the instruction is part of ld [IDX1+i], t1 ! 1 + ! IDX2(j) = j XOR 2 xor i, 8, t2 ! ld [idx-16], t2 ! 2 add wtxt, t1, t1 ! 1 -- GitLab