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Arch: Host: Update atomic functions for gcc and xt-xcc 

This patch adds for host gcc build the updated atomic
operations. These are intended to replace the previous
__sync built-ins. For more information see
https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html .

The atomic functions for xcc are fake but sufficient for
host arch build for static single-thread testbench.

Suggested-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
This commit is contained in:
Seppo Ingalsuo 2023-03-02 17:18:01 +02:00 committed by Liam Girdwood
parent e9cfb64f0d
commit 4e605c888b
1 changed files with 56 additions and 4 deletions
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60
src/arch/host/include/arch/atomic.h
View File

@ -17,9 +17,44 @@ typedef struct {
volatile int32_t value;
} atomic_t;
#if defined __GNUC__ && !defined __XCC__
static inline int32_t arch_atomic_read(const atomic_t *a)
{
return (*(volatile int32_t *)&a->value);
return __atomic_load_n(&a->value, __ATOMIC_SEQ_CST);
}
static inline void arch_atomic_set(atomic_t *a, int32_t value)
{
__atomic_store_n(&a->value, value, __ATOMIC_SEQ_CST);
}
static inline void arch_atomic_init(atomic_t *a, int32_t value)
{
__atomic_store_n(&a->value, value, __ATOMIC_SEQ_CST);
}
static inline int32_t arch_atomic_add(atomic_t *a, int32_t value)
{
return __atomic_add_fetch(&a->value, value, __ATOMIC_SEQ_CST);
}
static inline int32_t arch_atomic_sub(atomic_t *a, int32_t value)
{
return __atomic_sub_fetch(&a->value, value, __ATOMIC_SEQ_CST);
}
#elif defined __XCC__
/* fake locking: obviously this does nothing, and provides no real locking */
#define lock() do {} while (0)
#define unlock() do {} while (0)
/* Fake atomic functions for xt-run static single-thread testbench */
static inline int32_t arch_atomic_read(const atomic_t *a)
{
return a->value;
}
static inline void arch_atomic_set(atomic_t *a, int32_t value)
@ -32,17 +67,34 @@ static inline void arch_atomic_init(atomic_t *a, int32_t value)
arch_atomic_set(a, value);
}
/* use gcc atomic built-ins for host library */
static inline int32_t arch_atomic_add(atomic_t *a, int32_t value)
{
return __sync_fetch_and_add(&a->value, value);
int32_t tmp;
lock();
tmp = a->value;
a->value += value;
unlock();
return tmp;
}
static inline int32_t arch_atomic_sub(atomic_t *a, int32_t value)
{
return __sync_fetch_and_sub(&a->value, value);
int32_t tmp;
lock();
tmp = a->value;
a->value -= value;
unlock();
return tmp;
}
#else
#error "Not gcc, not xt-xcc"
#endif
#endif /* __ARCH_ATOMIC_H__ */
#else