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/strchr_64.c b/arch/tile/lib/strchr_64.c
index 617a927..f39f9dc 100644
--- a/arch/tile/lib/strchr_64.c
+++ b/arch/tile/lib/strchr_64.c
@@ -15,8 +15,7 @@
#include <linux/types.h>
#include <linux/string.h>
#include <linux/module.h>
-
-#undef strchr
+#include "string-endian.h"
char *strchr(const char *s, int c)
{
@@ -33,13 +32,9 @@
* match neither zero nor goal (we make sure the high bit of each
* byte is 1, and the low 7 bits are all the opposite of the goal
* byte).
- *
- * Note that this shift count expression works because we know shift
- * counts are taken mod 64.
*/
- const uint64_t before_mask = (1ULL << (s_int << 3)) - 1;
- uint64_t v = (*p | before_mask) ^
- (goal & __insn_v1shrsi(before_mask, 1));
+ const uint64_t before_mask = MASK(s_int);
+ uint64_t v = (*p | before_mask) ^ (goal & __insn_v1shrui(before_mask, 1));
uint64_t zero_matches, goal_matches;
while (1) {
@@ -55,8 +50,8 @@
v = *++p;
}
- z = __insn_ctz(zero_matches);
- g = __insn_ctz(goal_matches);
+ z = CFZ(zero_matches);
+ g = CFZ(goal_matches);
/* If we found c before '\0' we got a match. Note that if c == '\0'
* then g == z, and we correctly return the address of the '\0'