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| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-01 15:52:17 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-01 16:23:12 -0400 |
| commit | c53c70a90fdce3e7a53a0412abf7cc2b2a645988 (patch) | |
| tree | 0b1ec6d04be95ac07563ba518047be73973d25d8 /arch/tile/lib/memset_64.c | |
| parent | dd78bc11fb2050b6a3990d0421feca4c68ca4335 (diff) | |
| download | linux-c53c70a90fdce3e7a53a0412abf7cc2b2a645988.tar.bz2 | |
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/memset_64.c')
| -rw-r--r-- | arch/tile/lib/memset_64.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/arch/tile/lib/memset_64.c b/arch/tile/lib/memset_64.c index 3873085711d5..03ef69cd73de 100644 --- a/arch/tile/lib/memset_64.c +++ b/arch/tile/lib/memset_64.c @@ -12,13 +12,11 @@ * more details. */ -#include <arch/chip.h> - #include <linux/types.h> #include <linux/string.h> #include <linux/module.h> - -#undef memset +#include <arch/chip.h> +#include "string-endian.h" void *memset(void *s, int c, size_t n) { @@ -70,8 +68,7 @@ void *memset(void *s, int c, size_t n) n64 = n >> 3; /* Tile input byte out to 64 bits. */ - /* KLUDGE */ - v64 = 0x0101010101010101ULL * (uint8_t)c; + v64 = copy_byte(c); /* This must be at least 8 or the following loop doesn't work. */ #define CACHE_LINE_SIZE_IN_DOUBLEWORDS (CHIP_L2_LINE_SIZE() / 8) |