51 lines
1.2 KiB
Diff
51 lines
1.2 KiB
Diff
diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
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index 6b368a5..86e0e84 100644
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--- a/src/include/storage/s_lock.h
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+++ b/src/include/storage/s_lock.h
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@@ -696,6 +696,45 @@ do \
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#endif /* __mips__ && !__sgi */
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+#if defined(__loongarch__) /* loongarch */
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+#define HAS_TEST_AND_SET
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+
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+typedef unsigned int slock_t;
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+
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+#define TAS(lock) tas(lock)
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+
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+static __inline__ int
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+tas(volatile slock_t *lock)
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+{
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+ register volatile slock_t *_l = lock;
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+ register int _res;
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+ register int _tmp;
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+
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+ __asm__ __volatile__(
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+ " ll.w %0, %2 \n"
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+ " ori %1, %0, 1 \n"
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+ " sc.w %1, %2 \n"
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+ " xori %1, %1, 1 \n"
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+ " or %0, %0, %1 \n"
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+ " dbar 0 \n"
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+: "=&r" (_res), "=&r" (_tmp), "+R" (*_l)
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+: /* no inputs */
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+: "memory");
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+ return _res;
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+}
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+
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+#define S_UNLOCK(lock) \
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+do \
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+{ \
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+ __asm__ __volatile__( \
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+ " dbar 0 \n" \
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+: /* no outputs */ \
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+: /* no inputs */ \
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+: "memory"); \
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+ *((volatile slock_t *) (lock)) = 0; \
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+} while (0)
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+#endif /* __loongarch__ */
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+
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#if defined(__m32r__) && defined(HAVE_SYS_TAS_H) /* Renesas' M32R */
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#define HAS_TEST_AND_SET
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