When CONFIG_RTE_FORCE_INTRINSICS is enabled for x86, the clang
compilation error was:
include/generic/rte_atomic.h:215:9: error:
implicit declaration of function '__atomic_exchange_2'
is invalid in C99
include/generic/rte_atomic.h:494:9: error:
implicit declaration of function '__atomic_exchange_4'
is invalid in C99
include/generic/rte_atomic.h:772:9: error:
implicit declaration of function '__atomic_exchange_8'
is invalid in C99
Use __atomic_exchange_n instead of __atomic_exchange_(2/4/8).
For more information, please refer to:
http://mails.dpdk.org/archives/dev/2018-April/096776.html
Fixes: 7bdccb93078e ("eal: fix ARM build with clang")
Cc: sta...@dpdk.org
Signed-off-by: Gavin Hu <gavin...@arm.com>
---
lib/librte_eal/common/include/generic/rte_atomic.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/lib/librte_eal/common/include/generic/rte_atomic.h
b/lib/librte_eal/common/include/generic/rte_atomic.h
index b99ba4688..ed5b125b3 100644
--- a/lib/librte_eal/common/include/generic/rte_atomic.h
+++ b/lib/librte_eal/common/include/generic/rte_atomic.h
@@ -212,7 +212,7 @@ rte_atomic16_exchange(volatile uint16_t *dst, uint16_t val);
static inline uint16_t
rte_atomic16_exchange(volatile uint16_t *dst, uint16_t val)
{
-#if defined(RTE_ARCH_ARM64) && defined(RTE_TOOLCHAIN_CLANG)
+#if defined(RTE_TOOLCHAIN_CLANG)
return __atomic_exchange_n(dst, val, __ATOMIC_SEQ_CST);
#else
return __atomic_exchange_2(dst, val, __ATOMIC_SEQ_CST);
@@ -495,7 +495,7 @@ rte_atomic32_exchange(volatile uint32_t *dst, uint32_t val);
static inline uint32_t
rte_atomic32_exchange(volatile uint32_t *dst, uint32_t val)
{
-#if defined(RTE_ARCH_ARM64) && defined(RTE_TOOLCHAIN_CLANG)
+#if defined(RTE_TOOLCHAIN_CLANG)
return __atomic_exchange_n(dst, val, __ATOMIC_SEQ_CST);
#else
return __atomic_exchange_4(dst, val, __ATOMIC_SEQ_CST);
@@ -777,7 +777,7 @@ rte_atomic64_exchange(volatile uint64_t *dst, uint64_t val);
static inline uint64_t
rte_atomic64_exchange(volatile uint64_t *dst, uint64_t val)
{
-#if defined(RTE_ARCH_ARM64) && defined(RTE_TOOLCHAIN_CLANG)
+#if defined(RTE_TOOLCHAIN_CLANG)
return __atomic_exchange_n(dst, val, __ATOMIC_SEQ_CST);
#else
return __atomic_exchange_8(dst, val, __ATOMIC_SEQ_CST);
--
2.11.0
