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Add arch-specific configuration for C11 atomics support.

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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.
This commit is contained in:
Torvald Riegel
2014-10-18 01:02:59 +02:00
parent d960211ff5
commit 1ea339b697
22 changed files with 119 additions and 0 deletions
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3
sysdeps/sparc/sparc32/bits/atomic.h
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@ -47,6 +47,9 @@ typedef uintptr_t uatomicptr_t;
typedef intmax_t atomic_max_t;
typedef uintmax_t uatomic_max_t;
#define __HAVE_64B_ATOMICS 0
#define USE_ATOMIC_COMPILER_BUILTINS 0
/* We have no compare and swap, just test and set.
The following implementation contends on 64 global locks

3
sysdeps/sparc/sparc32/sparcv9/bits/atomic.h
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@ -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 0
#define USE_ATOMIC_COMPILER_BUILTINS 0
#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
(abort (), (__typeof (*mem)) 0)

3
sysdeps/sparc/sparc64/bits/atomic.h
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@ -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) \
(abort (), (__typeof (*mem)) 0)