From fa3522407f01ead1ec14bdd6b785ea08d17d500d Mon Sep 17 00:00:00 2001 From: Haavard Skinnemoen Date: Tue, 24 Oct 2006 10:12:42 +0200 Subject: [PATCH] AVR32: Fix oversize immediates in atomic.h When calling e.g. atomic_sub_return with a large constant, the compiler may output an immediate that is too large for the sub instruction in the middle of the loop. Fix this by explicitly specifying the number of bits allowed in the constraint. Also stop atomic_add_return() and friends from falling back to their respective "sub" variants if the constant is too large to fit in an immediate. Signed-off-by: Haavard Skinnemoen Signed-off-by: Linus Torvalds --- include/asm-avr32/atomic.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include/asm-avr32') diff --git a/include/asm-avr32/atomic.h b/include/asm-avr32/atomic.h index e0b9c44c126c..c40b6032c480 100644 --- a/include/asm-avr32/atomic.h +++ b/include/asm-avr32/atomic.h @@ -41,7 +41,7 @@ static inline int atomic_sub_return(int i, atomic_t *v) " stcond %1, %0\n" " brne 1b" : "=&r"(result), "=o"(v->counter) - : "m"(v->counter), "ir"(i) + : "m"(v->counter), "rKs21"(i) : "cc"); return result; @@ -58,7 +58,7 @@ static inline int atomic_add_return(int i, atomic_t *v) { int result; - if (__builtin_constant_p(i)) + if (__builtin_constant_p(i) && (i >= -1048575) && (i <= 1048576)) result = atomic_sub_return(-i, v); else asm volatile( @@ -101,7 +101,7 @@ static inline int atomic_sub_unless(atomic_t *v, int a, int u) " mov %1, 1\n" "1:" : "=&r"(tmp), "=&r"(result), "=o"(v->counter) - : "m"(v->counter), "ir"(a), "ir"(u) + : "m"(v->counter), "rKs21"(a), "rKs21"(u) : "cc", "memory"); return result; @@ -121,7 +121,7 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u) { int tmp, result; - if (__builtin_constant_p(a)) + if (__builtin_constant_p(a) && (a >= -1048575) && (a <= 1048576)) result = atomic_sub_unless(v, -a, u); else { result = 0; -- cgit v1.2.2