diff options
| author | Niels Möller <nisse@lysator.liu.se> | 2020-12-01 18:07:21 +0100 |
|---|---|---|
| committer | Niels Möller <nisse@lysator.liu.se> | 2020-12-01 18:07:21 +0100 |
| commit | 1d2cb8ba6fb85fc0c2653f8a9972c17c6990e23b (patch) | |
| tree | 8dcc7f647b7f56d1e9ec629712ca9970662f2907 | |
| parent | 377bddbc533f9363234737e0526b66def9fc63a8 (diff) | |
| download | nettle-1d2cb8ba6fb85fc0c2653f8a9972c17c6990e23b.tar.gz | |
ppc: Optimize chacha_4core main loop
* powerpc64/p7/chacha-4core.asm (QR): Instruction level
interleaving in the main loop, written by Torbjörn Granlund.
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | powerpc64/p7/chacha-4core.asm | 51 |
2 files changed, 47 insertions, 9 deletions
@@ -1,3 +1,8 @@ +2020-12-01 Niels Möller <nisse@lysator.liu.se> + + * powerpc64/p7/chacha-4core.asm (QR): Instruction level + interleaving in the main loop, written by Torbjörn Granlund. + 2020-11-30 Niels Möller <nisse@lysator.liu.se> * m4-utils.m4 (m4_unquote): New macro, copied from GMP's diff --git a/powerpc64/p7/chacha-4core.asm b/powerpc64/p7/chacha-4core.asm index ce1e9a67..0cd5c877 100644 --- a/powerpc64/p7/chacha-4core.asm +++ b/powerpc64/p7/chacha-4core.asm @@ -56,18 +56,57 @@ define(`T3', `v23') C Main loop for round define(`QR',` vadduwm $1, $1, $2 + vadduwm $5, $5, $6 vxor $4, $4, $1 + vxor $8, $8, $5 vrlw $4, $4, ROT16 + vrlw $8, $8, ROT16 + vadduwm $9, $9, $10 + vadduwm $13, $13, $14 + vxor $12, $12, $9 + vxor $16, $16, $13 + vrlw $12, $12, ROT16 + vrlw $16, $16, ROT16 + vadduwm $3, $3, $4 + vadduwm $7, $7, $8 vxor $2, $2, $3 + vxor $6, $6, $7 vrlw $2, $2, ROT12 + vrlw $6, $6, ROT12 + vadduwm $11, $11, $12 + vadduwm $15, $15, $16 + vxor $10, $10, $11 + vxor $14, $14, $15 + vrlw $10, $10, ROT12 + vrlw $14, $14, ROT12 + vadduwm $1, $1, $2 + vadduwm $5, $5, $6 vxor $4, $4, $1 + vxor $8, $8, $5 vrlw $4, $4, ROT8 + vrlw $8, $8, ROT8 + vadduwm $9, $9, $10 + vadduwm $13, $13, $14 + vxor $12, $12, $9 + vxor $16, $16, $13 + vrlw $12, $12, ROT8 + vrlw $16, $16, ROT8 + vadduwm $3, $3, $4 + vadduwm $7, $7, $8 vxor $2, $2, $3 + vxor $6, $6, $7 vrlw $2, $2, ROT7 - ') + vrlw $6, $6, ROT7 + vadduwm $11, $11, $12 + vadduwm $15, $15, $16 + vxor $10, $10, $11 + vxor $14, $14, $15 + vrlw $10, $10, ROT7 + vrlw $14, $14, ROT7 +') define(`TRANSPOSE',` vmrghw T0, $1, $3 C A0 A2 B0 B2 @@ -143,14 +182,8 @@ C Load state and splat srdi ROUNDS, ROUNDS, 1 mtctr ROUNDS .Loop: - QR(v0, v4, v8, v12) - QR(v1, v5, v9, v13) - QR(v2, v6, v10, v14) - QR(v3, v7, v11, v15) - QR(v0, v5, v10, v15) - QR(v1, v6, v11, v12) - QR(v2, v7, v8, v13) - QR(v3, v4, v9, v14) + QR(v0, v4, v8, v12, v1, v5, v9, v13, v2, v6, v10, v14, v3, v7, v11, v15) + QR(v0, v5, v10, v15, v1, v6, v11, v12, v2, v7, v8, v13, v3, v4, v9, v14) bdnz .Loop C Add in saved original words, including counters, before |