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| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-01 19:52:17 (GMT) |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-01 20:23:12 (GMT) |
| commit | c53c70a90fdce3e7a53a0412abf7cc2b2a645988 (patch) | |
| tree | 0b1ec6d04be95ac07563ba518047be73973d25d8 /arch/tile/lib/strchr_64.c | |
| parent | dd78bc11fb2050b6a3990d0421feca4c68ca4335 (diff) | |
| download | linux-c53c70a90fdce3e7a53a0412abf7cc2b2a645988.tar.xz | |
tile: optimize and clean up string functions
This change cleans up the string code in a number of ways:
- For memcpy(), fix bug in prefetch and increase distance to 3 lines;
optimize for unaligned data; do all loads before wh64 to make memcpy
safe for forward-overlapping calls; etc. Performance is improved.
- Use new copy_byte() function on tilegx to spread a single byte value
out into a full word using the shufflebytes instruction.
- Clean up header include ordering to be more canonical, and remove
spurious #undefs of function names.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/lib/strchr_64.c')
| -rw-r--r-- | arch/tile/lib/strchr_64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/tile/lib/strchr_64.c b/arch/tile/lib/strchr_64.c index f39f9dc..fe6e31c 100644 --- a/arch/tile/lib/strchr_64.c +++ b/arch/tile/lib/strchr_64.c @@ -26,7 +26,7 @@ char *strchr(const char *s, int c) const uint64_t *p = (const uint64_t *)(s_int & -8); /* Create eight copies of the byte for which we are looking. */ - const uint64_t goal = 0x0101010101010101ULL * (uint8_t) c; + const uint64_t goal = copy_byte(c); /* Read the first aligned word, but force bytes before the string to * match neither zero nor goal (we make sure the high bit of each |