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| author | Niels Möller <nisse@lysator.liu.se> | 2002-05-15 22:32:26 +0200 |
|---|---|---|
| committer | Niels Möller <nisse@lysator.liu.se> | 2002-05-15 22:32:26 +0200 |
| commit | 35a46d53bec9efeec923dcee95fde38323020772 (patch) | |
| tree | 682ce991f8b1f1c32bf475dd208caf693b7cca37 | |
| parent | 578b7985f0d5ac5eea7e50b0ca5b59cf98680c1d (diff) | |
| download | nettle-35a46d53bec9efeec923dcee95fde38323020772.tar.gz | |
* sparc/aes.asm (_aes_crypt): Unrolled final loop, preparing for
optimizations.
(_aes_crypt): Eliminated i from forst copy of the loop. Some
cleanup.
Rev: src/nettle/sparc/aes.asm:1.87
| -rw-r--r-- | sparc/aes.asm | 29 |
1 files changed, 10 insertions, 19 deletions
diff --git a/sparc/aes.asm b/sparc/aes.asm index 6731c259..c2bd6764 100644 --- a/sparc/aes.asm +++ b/sparc/aes.asm @@ -298,17 +298,16 @@ define(i, round) ! NOTE: First instruction duplicated in delay slot C i = 0 - ld [IDX1+i], t1 ! 1 -C .Lfinal_loop: - ! IDX2(j) = j XOR 2 - xor i, 8, t2 + ld [IDX1+0], t1 ! 1 + C xor i, 8, t2 add wtxt, t1, t1 ! 1 ldub [t1+2], t1 ! 1 - ld [wtxt+i], t0 ! 0 - lduh [wtxt+t2], t2 ! 2 + ld [wtxt+0], t0 ! 0 + ! IDX2(j) = j XOR 2 + lduh [wtxt+8], t2 ! 2 and t0, 255, t0 ! 0 - ld [IDX3 + i], t3 ! 3 + ld [IDX3 + 0], t3 ! 3 and t2, 255, t2 ! 2 ldub [T+t1], t1 ! 1 @@ -322,13 +321,12 @@ C .Lfinal_loop: sll t2, 16, t2 ! 2 or t0, t2, t0 ! 0, 1, 2 - ld [key + i], t2 + ld [key + 0], t2 sll t3, 24, t3 ! 3 or t0, t3, t0 ! 0, 1, 2, 3 xor t0, t2, t0 add i, 4, i - cmp i, 12 srl t0, 24, t3 srl t0, 16, t2 @@ -340,12 +338,11 @@ C .Lfinal_loop: stb t0, [dst] add dst, 4, dst - C bleu .Lfinal_loop ld [IDX1+i], t1 ! 1 C i = 1 ld [IDX1+i], t1 ! 1 -C .Lfinal_loop: + ! IDX2(j) = j XOR 2 xor i, 8, t2 add wtxt, t1, t1 ! 1 @@ -374,7 +371,6 @@ C .Lfinal_loop: or t0, t3, t0 ! 0, 1, 2, 3 xor t0, t2, t0 add i, 4, i - cmp i, 12 srl t0, 24, t3 srl t0, 16, t2 @@ -386,12 +382,11 @@ C .Lfinal_loop: stb t0, [dst] add dst, 4, dst - C bleu .Lfinal_loop ld [IDX1+i], t1 ! 1 C i = 2 ld [IDX1+i], t1 ! 1 -C .Lfinal_loop: + ! IDX2(j) = j XOR 2 xor i, 8, t2 add wtxt, t1, t1 ! 1 @@ -420,7 +415,6 @@ C .Lfinal_loop: or t0, t3, t0 ! 0, 1, 2, 3 xor t0, t2, t0 add i, 4, i - cmp i, 12 srl t0, 24, t3 srl t0, 16, t2 @@ -432,12 +426,11 @@ C .Lfinal_loop: stb t0, [dst] add dst, 4, dst - C bleu .Lfinal_loop ld [IDX1+i], t1 ! 1 C i = 3 ld [IDX1+i], t1 ! 1 -C .Lfinal_loop: + ! IDX2(j) = j XOR 2 xor i, 8, t2 add wtxt, t1, t1 ! 1 @@ -466,7 +459,6 @@ C .Lfinal_loop: or t0, t3, t0 ! 0, 1, 2, 3 xor t0, t2, t0 add i, 4, i - cmp i, 12 srl t0, 24, t3 srl t0, 16, t2 @@ -478,7 +470,6 @@ C .Lfinal_loop: stb t0, [dst] add dst, 4, dst - C bleu .Lfinal_loop ld [IDX1+i], t1 ! 1 C Unrolled final loop ends |