This patch adds the dapl_os_atopmic_inc, dapl_os_atomic_dec, and
dapl_os_atomic_assign function implementatios to the dapl userspace package
to provide the DAPL API support on the s390x platform by adding Assembler
language implemenation of those platform specific functions.
Signed-off-by: Alexey Ishchuk <aishchuk@xxxxxxxxxxxxxxxxxx>
---
dapl/udapl/linux/dapl_osd.h | 37 ++++++++++++++++++++++++++++++++++++-
1 file changed, 36 insertions(+), 1 deletion(-)
--- a/dapl/udapl/linux/dapl_osd.h
+++ b/dapl/udapl/linux/dapl_osd.h
@@ -49,7 +49,9 @@
#error UNDEFINED OS TYPE
#endif /* __linux__ */
-#if !defined (__i386__) && !defined (__ia64__) && !defined(__x86_64__) && !defined(__PPC__) && !defined(__PPC64__)
+#if !defined(__i386__) && !defined(__ia64__) \
+&& !defined(__x86_64__) && !defined(__PPC__) && !defined(__PPC64__) \
+&& !defined(__s390x__)
#error UNDEFINED ARCH
#endif
@@ -156,6 +158,22 @@ int dapl_os_get_env_val (
/* atomic functions */
+#ifdef __s390x__
+#define DAPL_CS_ADD(ptr, op_val) ({ \
+ int old_val, new_val; \
+ __asm__ __volatile__( \
+ " l %0,%2\n" \
+ "0: lr %1,%0\n" \
+ " ar %1,%3\n" \
+ " cs %0,%1,%2\n" \
+ " jl 0b" \
+ : "=&d" (old_val), "=&d" (new_val), \
+ "=Q" (*ptr) \
+ : "d" (op_val), "Q" (*ptr) \
+ : "cc", "memory"); \
+ new_val; \
+})
+#endif
/* dapl_os_atomic_inc
*
@@ -179,6 +197,11 @@ dapl_os_atomic_inc (
#else
IA64_FETCHADD(old_value,v,1,4);
#endif
+#elif defined(__s390x__)
+ DAT_COUNT tmp;
+ DAT_COUNT delta = 1;
+
+ tmp = DAPL_CS_ADD(v, delta);
#elif defined(__PPC__) || defined(__PPC64__)
int tmp;
@@ -218,6 +241,11 @@ dapl_os_atomic_dec (
#else
IA64_FETCHADD(old_value,v,-1,4);
#endif
+#elif defined(__s390x__)
+ DAT_COUNT tmp;
+ DAT_COUNT delta = -1;
+
+ tmp = DAPL_CS_ADD(v, delta);
#elif defined (__PPC__) || defined(__PPC64__)
int tmp;
@@ -273,6 +301,13 @@ dapl_os_atomic_assign (
#else
current_value = ia64_cmpxchg(acq,v,match_value,new_value,4);
#endif /* __ia64__ */
+#elif defined(__s390x__)
+ __asm__ __volatile__(
+ " cs %0,%2,%1\n"
+ : "+d" (match_value), "=Q" (*v)
+ : "d" (new_value), "Q" (*v)
+ : "cc", "memory");
+ current_value = match_value;
#elif defined(__PPC__) || defined(__PPC64__)
__asm__ __volatile__ (
" lwsync\n\
--
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