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-rw-r--r--libc/sysdeps/linux/arm/bits/atomicity.h33
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");