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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-11-12 19:11:10 +0000
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-11-27 10:31:13 -0300
commit3b5ebe85aabfa44583a18a7ef51bc4d387e362c1 (patch)
tree8853a1bcbe48f93c1e696ae89e503922845c6e8c /sysdeps/sparc/Makefile
parent5d9b7b9fa734c5381e0295c85c0e40520d9f6063 (diff)
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sparc: Use atomic compiler builtins on sparc
This patch removes the arch-specific atomic instruction, relying on
compiler builtins.  The __sparc32_atomic_locks support is removed
and a configure check is added to check if compiler uses libatomic
to implement CAS.

It also removes the sparc specific sem_* and pthread_barrier_*
implementations.  It in turn allows buidling against a LEON3/LEON4
sparcv8 target, although it will still be incompatible with generic
sparcv9.

Checked on sparcv9-linux-gnu and sparc64-linux-gnu.  I also checked
with build against sparcv8-linux-gnu with -mcpu=leon3.

Tested-by: Andreas Larsson <andreas@gaisler.com>
Diffstat (limited to 'sysdeps/sparc/Makefile')
-rw-r--r--sysdeps/sparc/Makefile9
1 files changed, 9 insertions, 0 deletions
diff --git a/sysdeps/sparc/Makefile b/sysdeps/sparc/Makefile
index 3f0c096400..38b33af6e0 100644
--- a/sysdeps/sparc/Makefile
+++ b/sysdeps/sparc/Makefile
@@ -16,5 +16,14 @@ CPPFLAGS-crti.S += -fPIC
 CPPFLAGS-crtn.S += -fPIC
 endif
 
+# nscd uses atomic_spin_nop which in turn requires cpu_relax
+ifeq ($(subdir),nscd)
+routines += cpu_relax
+endif
+
+ifeq ($(subdir), nptl)
+libpthread-routines += cpu_relax
+endif
+
 # The assembler on SPARC needs the -fPIC flag even when it's assembler code.
 ASFLAGS-.os += -fPIC