This patch fixes atomic.c for big endian configurations.
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 56c58dd..bcd6cb1 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,5 +1,11 @@
2014-01-25 Walter Lee <w...@tilera.com>
+ * config/tilepro/atomic.c (BIT_OFFSET): Define.
+ (__atomic_subword_cmpxchg): Use BIT_OFFSET.
+ (__atomic_subword): Ditto.
+
+2014-01-25 Walter Lee <w...@tilera.com>
+
* config/tilepro/atomic.c (__atomic_do_and_fetch): Add
a prefix op argument.
(__atomic_nand_fetch_4): Add prefix op.
diff --git a/libgcc/config/tilepro/atomic.c b/libgcc/config/tilepro/atomic.c
index 9919323..2ad114a 100644
--- a/libgcc/config/tilepro/atomic.c
+++ b/libgcc/config/tilepro/atomic.c
@@ -135,6 +135,12 @@ __atomic_exchange_##size(volatile type* ptr, type val, int
model) \
__atomic_exchange_methods (int, 4)
__atomic_exchange_methods (long long, 8)
+#ifdef __LITTLE_ENDIAN__
+#define BIT_OFFSET(n, type) ((n) * 8)
+#else
+#define BIT_OFFSET(n, type) ((4 - sizeof(type) - (n)) * 8)
+#endif
+
/* Subword methods require the same approach for both TILEPro and
TILE-Gx. We load the background data for the word, insert the
desired subword piece, then compare-and-exchange it into place. */
@@ -150,7 +156,7 @@ __atomic_compare_exchange_##size(volatile type* ptr, type*
guess, \
{ \
pre_atomic_barrier(models); \
unsigned int *p = (unsigned int *)((unsigned long)ptr & ~3UL); \
- const int shift = ((unsigned long)ptr & 3UL) * 8; \
+ const int shift = BIT_OFFSET((unsigned long)ptr & 3UL, type);
\
const unsigned int valmask = (1 << (sizeof(type) * 8)) - 1; \
const unsigned int bgmask = ~(valmask << shift); \
unsigned int oldword = *p; \
@@ -177,7 +183,7 @@ proto
\
{ \
top \
unsigned int *p = (unsigned int *)((unsigned long)ptr & ~3UL); \
- const int shift = ((unsigned long)ptr & 3UL) * 8; \
+ const int shift = BIT_OFFSET((unsigned long)ptr & 3UL, type);
\
const unsigned int valmask = (1 << (sizeof(type) * 8)) - 1; \
const unsigned int bgmask = ~(valmask << shift); \
unsigned int oldword, xword = *p; \
