arch/tile: support building big-endian kernel
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>
diff --git a/arch/tile/lib/strlen_64.c b/arch/tile/lib/strlen_64.c
index 1c92d46..9583fc3 100644
--- a/arch/tile/lib/strlen_64.c
+++ b/arch/tile/lib/strlen_64.c
@@ -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 @@
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);