diff options
author | lbmkplaceholder <placeholder@lbmkplaceholder.com> | 2022-12-23 10:37:30 +0000 |
---|---|---|
committer | lbmkplaceholder <placeholder@lbmkplaceholder.com> | 2022-12-23 10:42:19 +0000 |
commit | 448ee5105de59e1eb4324ed62070bc130bd32c7a (patch) | |
tree | 0d3bc8600ddbe8e8f251a9cd3bfe01a3d455ed90 /util | |
parent | effcb942ceef282536d1da7de584357bdda5f9f3 (diff) |
util/nvmutil: optimise cmd_swap() further
don't do xor swap. we know gbe2 is always 4KB higher than
gbe in memory, so we can just set gbe2 to the value of gbe,
and OR the size in bytes of 4KB into gbe2
this is only a marginal speed boost, negligible even, but it's
done for the lulz
Diffstat (limited to 'util')
-rw-r--r-- | util/nvmutil/nvmutil.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c index 9a70634e..76273550 100644 --- a/util/nvmutil/nvmutil.c +++ b/util/nvmutil/nvmutil.c @@ -355,18 +355,16 @@ void cmd_swap(void) { int part0, part1; - size_t g1 = (size_t) gbe; - size_t g2 = (size_t) gbe2; + size_t ptr; part0 = validChecksum(0); part1 = validChecksum(1); if (part0 || part1) { - g1 ^= g2; - g2 ^= g1; - g1 ^= g2; - gbe = (uint8_t *) g1; - gbe2 = (uint8_t *) g2; + gbe2 = gbe; + ptr = (size_t) gbe; + ptr |= SIZE_4KB; + gbe = (uint8_t *) ptr; gbeFileModified = 1; nvmPartModified[0] = 1; |