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authorTorvald Riegel <triegel@redhat.com>2014-10-18 01:02:59 +0200
committerTorvald Riegel <triegel@redhat.com>2014-11-20 11:57:38 +0100
commit1ea339b69725cb2f30b5a84cb7ca96111c9a637b (patch)
tree130609da9190b04afb366f3a506d3415ea2f982f /sysdeps/m68k
parentd960211ff52a6ab632eace2f905c4898f187df9e (diff)
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Add arch-specific configuration for C11 atomics support.
This sets __HAVE_64B_ATOMICS if provided.  It also sets
USE_ATOMIC_COMPILER_BUILTINS to true if the existing atomic ops use the
__atomic* builtins (aarch64, mips partially) or if this has been
tested (x86_64); otherwise, this is set to false so that C11 atomics will
be based on the existing atomic operations.
Diffstat (limited to 'sysdeps/m68k')
-rw-r--r--sysdeps/m68k/coldfire/bits/atomic.h4
-rw-r--r--sysdeps/m68k/m680x0/m68020/bits/atomic.h3
2 files changed, 7 insertions, 0 deletions
diff --git a/sysdeps/m68k/coldfire/bits/atomic.h b/sysdeps/m68k/coldfire/bits/atomic.h
index ec0c59a7da..4851999fca 100644
--- a/sysdeps/m68k/coldfire/bits/atomic.h
+++ b/sysdeps/m68k/coldfire/bits/atomic.h
@@ -49,6 +49,10 @@ typedef uintptr_t uatomicptr_t;
 typedef intmax_t atomic_max_t;
 typedef uintmax_t uatomic_max_t;
 
+/* If we have just non-atomic operations, we can as well make them wide.  */
+#define __HAVE_64B_ATOMICS 1
+#define USE_ATOMIC_COMPILER_BUILTINS 0
+
 /* The only basic operation needed is compare and exchange.  */
 #define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \
   ({ __typeof (mem) __gmemp = (mem);				      \
diff --git a/sysdeps/m68k/m680x0/m68020/bits/atomic.h b/sysdeps/m68k/m680x0/m68020/bits/atomic.h
index 0f081f169a..395bac06b9 100644
--- a/sysdeps/m68k/m680x0/m68020/bits/atomic.h
+++ b/sysdeps/m68k/m680x0/m68020/bits/atomic.h
@@ -44,6 +44,9 @@ typedef uintptr_t uatomicptr_t;
 typedef intmax_t atomic_max_t;
 typedef uintmax_t uatomic_max_t;
 
+#define __HAVE_64B_ATOMICS 1
+#define USE_ATOMIC_COMPILER_BUILTINS 0
+
 #define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
   ({ __typeof (*(mem)) __ret;						      \
      __asm __volatile ("cas%.b %0,%2,%1"				      \