Index: libgcc/config/arm/linux-atomic.c
===================================================================
--- libgcc/config/arm/linux-atomic.c	(revision 196648)
+++ libgcc/config/arm/linux-atomic.c	(working copy)
@@ -97,19 +97,19 @@ FETCH_AND_OP_WORD (nand, ~, &)
     return (RETURN & mask) >> shift;					\
   }
 
-SUBWORD_SYNC_OP (add,   , +, unsigned short, 2, oldval)
-SUBWORD_SYNC_OP (sub,   , -, unsigned short, 2, oldval)
-SUBWORD_SYNC_OP (or,    , |, unsigned short, 2, oldval)
-SUBWORD_SYNC_OP (and,   , &, unsigned short, 2, oldval)
-SUBWORD_SYNC_OP (xor,   , ^, unsigned short, 2, oldval)
-SUBWORD_SYNC_OP (nand, ~, &, unsigned short, 2, oldval)
-
-SUBWORD_SYNC_OP (add,   , +, unsigned char, 1, oldval)
-SUBWORD_SYNC_OP (sub,   , -, unsigned char, 1, oldval)
-SUBWORD_SYNC_OP (or,    , |, unsigned char, 1, oldval)
-SUBWORD_SYNC_OP (and,   , &, unsigned char, 1, oldval)
-SUBWORD_SYNC_OP (xor,   , ^, unsigned char, 1, oldval)
-SUBWORD_SYNC_OP (nand, ~, &, unsigned char, 1, oldval)
+SUBWORD_SYNC_OP (add,   , +, short, 2, oldval)
+SUBWORD_SYNC_OP (sub,   , -, short, 2, oldval)
+SUBWORD_SYNC_OP (or,    , |, short, 2, oldval)
+SUBWORD_SYNC_OP (and,   , &, short, 2, oldval)
+SUBWORD_SYNC_OP (xor,   , ^, short, 2, oldval)
+SUBWORD_SYNC_OP (nand, ~, &, short, 2, oldval)
+
+SUBWORD_SYNC_OP (add,   , +, signed char, 1, oldval)
+SUBWORD_SYNC_OP (sub,   , -, signed char, 1, oldval)
+SUBWORD_SYNC_OP (or,    , |, signed char, 1, oldval)
+SUBWORD_SYNC_OP (and,   , &, signed char, 1, oldval)
+SUBWORD_SYNC_OP (xor,   , ^, signed char, 1, oldval)
+SUBWORD_SYNC_OP (nand, ~, &, signed char, 1, oldval)
 
 #define OP_AND_FETCH_WORD(OP, PFX_OP, INF_OP)				\
   int HIDDEN								\
@@ -132,19 +132,19 @@ OP_AND_FETCH_WORD (and,   , &)
 OP_AND_FETCH_WORD (xor,   , ^)
 OP_AND_FETCH_WORD (nand, ~, &)
 
-SUBWORD_SYNC_OP (add,   , +, unsigned short, 2, newval)
-SUBWORD_SYNC_OP (sub,   , -, unsigned short, 2, newval)
-SUBWORD_SYNC_OP (or,    , |, unsigned short, 2, newval)
-SUBWORD_SYNC_OP (and,   , &, unsigned short, 2, newval)
-SUBWORD_SYNC_OP (xor,   , ^, unsigned short, 2, newval)
-SUBWORD_SYNC_OP (nand, ~, &, unsigned short, 2, newval)
-
-SUBWORD_SYNC_OP (add,   , +, unsigned char, 1, newval)
-SUBWORD_SYNC_OP (sub,   , -, unsigned char, 1, newval)
-SUBWORD_SYNC_OP (or,    , |, unsigned char, 1, newval)
-SUBWORD_SYNC_OP (and,   , &, unsigned char, 1, newval)
-SUBWORD_SYNC_OP (xor,   , ^, unsigned char, 1, newval)
-SUBWORD_SYNC_OP (nand, ~, &, unsigned char, 1, newval)
+SUBWORD_SYNC_OP (add,   , +, short, 2, newval)
+SUBWORD_SYNC_OP (sub,   , -, short, 2, newval)
+SUBWORD_SYNC_OP (or,    , |, short, 2, newval)
+SUBWORD_SYNC_OP (and,   , &, short, 2, newval)
+SUBWORD_SYNC_OP (xor,   , ^, short, 2, newval)
+SUBWORD_SYNC_OP (nand, ~, &, short, 2, newval)
+
+SUBWORD_SYNC_OP (add,   , +, signed char, 1, newval)
+SUBWORD_SYNC_OP (sub,   , -, signed char, 1, newval)
+SUBWORD_SYNC_OP (or,    , |, signed char, 1, newval)
+SUBWORD_SYNC_OP (and,   , &, signed char, 1, newval)
+SUBWORD_SYNC_OP (xor,   , ^, signed char, 1, newval)
+SUBWORD_SYNC_OP (nand, ~, &, signed char, 1, newval)
 
 int HIDDEN
 __sync_val_compare_and_swap_4 (int *ptr, int oldval, int newval)
@@ -181,7 +181,7 @@ __sync_val_compare_and_swap_4 (int *ptr,
 	actual_oldval = *wordptr;					\
 									\
 	if (__builtin_expect (((actual_oldval & mask) >> shift) !=      \
-                              (unsigned int) oldval, 0))                \
+                              ((unsigned int) oldval & MASK_##WIDTH), 0)) \
           return (actual_oldval & mask) >> shift;			\
 									\
 	actual_newval = (actual_oldval & ~mask)				\
@@ -195,8 +195,8 @@ __sync_val_compare_and_swap_4 (int *ptr,
       }									\
   }
 
-SUBWORD_VAL_CAS (unsigned short, 2)
-SUBWORD_VAL_CAS (unsigned char,  1)
+SUBWORD_VAL_CAS (short,       2)
+SUBWORD_VAL_CAS (signed char, 1)
 
 typedef unsigned char bool;
 
@@ -217,8 +217,8 @@ __sync_bool_compare_and_swap_4 (int *ptr
     return (oldval == actual_oldval);					\
   }
 
-SUBWORD_BOOL_CAS (unsigned short, 2)
-SUBWORD_BOOL_CAS (unsigned char,  1)
+SUBWORD_BOOL_CAS (short,       2)
+SUBWORD_BOOL_CAS (signed char, 1)
 
 void HIDDEN
 __sync_synchronize (void)
@@ -260,8 +260,8 @@ __sync_lock_test_and_set_4 (int *ptr, in
     return (oldval & mask) >> shift;					\
   }
 
-SUBWORD_TEST_AND_SET (unsigned short, 2)
-SUBWORD_TEST_AND_SET (unsigned char,  1)
+SUBWORD_TEST_AND_SET (short,       2)
+SUBWORD_TEST_AND_SET (signed char, 1)
 
 #define SYNC_LOCK_RELEASE(TYPE, WIDTH)					\
   void HIDDEN								\
