diff options
Diffstat (limited to 'libc/sysdeps')
| -rw-r--r-- | libc/sysdeps/linux/arm/bits/atomicity.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/arm/bits/atomicity.h b/libc/sysdeps/linux/arm/bits/atomicity.h index def974f8a..97d278610 100644 --- a/libc/sysdeps/linux/arm/bits/atomicity.h +++ b/libc/sysdeps/linux/arm/bits/atomicity.h @@ -31,12 +31,23 @@ exchange_and_add (volatile uint32_t *mem, int val) int tmp2; int result; __asm__ ("\n" +#if defined(__thumb__) + "\t.align 0\n" + "\tbx pc\n" + "\tnop\n" + "\t.arm\n" +#endif "0:\tldr\t%0,[%3]\n\t" "add\t%1,%0,%4\n\t" "swp\t%2,%1,[%3]\n\t" "cmp\t%0,%2\n\t" "swpne\t%1,%2,[%3]\n\t" "bne\t0b" +#if defined(__thumb__) + "\torr %1, pc, #1\n" + "\tbx %1\n" + "\t.force_thumb" +#endif : "=&r" (result), "=&r" (tmp1), "=&r" (tmp2) : "r" (mem), "r"(val) : "cc", "memory"); @@ -51,12 +62,23 @@ atomic_add (volatile uint32_t *mem, int val) int tmp2; int tmp3; __asm__ ("\n" +#if defined(__thumb__) + "\t.align 0\n" + "\tbx pc\n" + "\tnop\n" + "\t.arm\n" +#endif "0:\tldr\t%0,[%3]\n\t" "add\t%1,%0,%4\n\t" "swp\t%2,%1,[%3]\n\t" "cmp\t%0,%2\n\t" "swpne\t%1,%2,[%3]\n\t" "bne\t0b" +#if defined(__thumb__) + "\torr %1, pc, #1\n" + "\tbx %1\n" + "\t.force_thumb" +#endif : "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3) : "r" (mem), "r"(val) : "cc", "memory"); @@ -68,6 +90,12 @@ compare_and_swap (volatile long int *p, long int oldval, long int newval) { int result, tmp; __asm__ ("\n" +#if defined(__thumb__) + "\t.align 0\n" + "\tbx pc\n" + "\tnop\n" + "\t.arm\n" +#endif "0:\tldr\t%1,[%2]\n\t" "mov\t%0,#0\n\t" "cmp\t%1,%4\n\t" @@ -78,6 +106,11 @@ compare_and_swap (volatile long int *p, long int oldval, long int newval) "bne\t0b\n\t" "mov\t%0,#1\n" "1:" +#if defined(__thumb__) + "\torr %1, pc, #1\n" + "\tbx %1\n" + "\t.force_thumb" +#endif : "=&r" (result), "=&r" (tmp) : "r" (p), "r" (newval), "r" (oldval) : "cc", "memory"); |