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libbb/sha1: add config-selectable partially unrolled version

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function                                             old     new   delta
sha1_process_block64                                 364     732    +368
static.rconsts                                        16       -     -16
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(add/remove: 0/1 grow/shrink: 1/0 up/down: 368/-16)           Total: 352 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2021-12-30 18:54:02 +01:00
parent 25aadc893d
commit 0b62a08777
2 changed files with 98 additions and 5 deletions
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3
libbb/Config.src
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@@ -60,7 +60,8 @@ config SHA1_SMALL
throughput MB/s size of sha1_process_block64
value 486 x86-64 486 x86-64
0 339 374 4149 4167
1,2,3 200 195 358 380
1 224 229 654 732
2,3 200 195 358 380
config SHA3_SMALL
int "SHA3: Trade bytes for speed (0:fast, 1:slow)"