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arch/tile: support building big-endian kernel

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The toolchain supports big-endian mode now, so add support for building
the kernel to run big-endian as well.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf
2012-03-29 13:30:31 -04:00
parent 73636b1aac
commit 1efea40d41
10 changed files with 130 additions and 29 deletions
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11
arch/tile/lib/strlen_64.c
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@ -15,8 +15,7 @@
#include <linux/types.h>
#include <linux/string.h>
#include <linux/module.h>
#undef strlen
#include "string-endian.h"
size_t strlen(const char *s)
{
@ -24,15 +23,13 @@ size_t strlen(const char *s)
const uintptr_t s_int = (uintptr_t) s;
const uint64_t *p = (const uint64_t *)(s_int & -8);
/* Read the first word, but force bytes before the string to be nonzero.
* This expression works because we know shift counts are taken mod 64.
*/
uint64_t v = *p | ((1ULL << (s_int << 3)) - 1);
/* Read and MASK the first word. */
uint64_t v = *p | MASK(s_int);
uint64_t bits;
while ((bits = __insn_v1cmpeqi(v, 0)) == 0)
v = *++p;
return ((const char *)p) + (__insn_ctz(bits) >> 3) - s;
return ((const char *)p) + (CFZ(bits) >> 3) - s;
}
EXPORT_SYMBOL(strlen);