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| author | Torvald Riegel <triegel@redhat.com> | 2014-10-18 01:02:59 +0200 |
|---|---|---|
| committer | Torvald Riegel <triegel@redhat.com> | 2014-11-20 11:57:38 +0100 |
| commit | 1ea339b69725cb2f30b5a84cb7ca96111c9a637b (patch) | |
| tree | 130609da9190b04afb366f3a506d3415ea2f982f /sysdeps/s390/bits | |
| parent | d960211ff52a6ab632eace2f905c4898f187df9e (diff) | |
| download | glibc-1ea339b69725cb2f30b5a84cb7ca96111c9a637b.tar.gz glibc-1ea339b69725cb2f30b5a84cb7ca96111c9a637b.tar.xz glibc-1ea339b69725cb2f30b5a84cb7ca96111c9a637b.zip | |
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/s390/bits')
| -rw-r--r-- | sysdeps/s390/bits/atomic.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/s390/bits/atomic.h b/sysdeps/s390/bits/atomic.h index 6824165779..b809b5efaa 100644 --- a/sysdeps/s390/bits/atomic.h +++ b/sysdeps/s390/bits/atomic.h @@ -43,6 +43,8 @@ typedef uintptr_t uatomicptr_t; typedef intmax_t atomic_max_t; typedef uintmax_t uatomic_max_t; +#define USE_ATOMIC_COMPILER_BUILTINS 0 + #define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \ (abort (), (__typeof (*mem)) 0) @@ -59,6 +61,7 @@ typedef uintmax_t uatomic_max_t; __archold; }) #ifdef __s390x__ +# define __HAVE_64B_ATOMICS 1 # define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ ({ __typeof (mem) __archmem = (mem); \ __typeof (*mem) __archold = (oldval); \ @@ -67,6 +70,7 @@ typedef uintmax_t uatomic_max_t; : "d" ((long) (newval)), "m" (*__archmem) : "cc", "memory" ); \ __archold; }) #else +# define __HAVE_64B_ATOMICS 0 /* For 31 bit we do not really need 64-bit compare-and-exchange. We can implement them by use of the csd instruction. The straightforward implementation causes warnings so we skip the definition for now. */ |