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| author | Ivan Maidanski <ivmai@mail.ru> | 2013-08-17 12:13:40 +0400 |
|---|---|---|
| committer | Ivan Maidanski <ivmai@mail.ru> | 2013-08-17 13:27:06 +0400 |
| commit | 584c496166eeaacfb320431ac9b4e3d26004c3ae (patch) | |
| tree | e7d1dfa0b035c70f4446ecea38bc6f904b478019 | |
| parent | 171e056c49b4e07d64377a99f4544c6ae9db9403 (diff) | |
Support ARMv8 target (gcc/arm)
* src/atomic_ops/sysdeps/gcc/arm.h (__ARM_ARCH_8A__): Detect new macro
(treated same as __ARM_ARCH_7A__).
* src/atomic_ops/sysdeps/gcc/arm.h (AO_ARM_HAVE_SWP): Do not define
for ARMv8 (since SWP{B} obsoleted); add comment.
* src/atomic_ops/sysdeps/gcc/arm.h (AO_compare_and_swap): Add TODO
item (for deprecated IT block containing wide Thumb instruction).
| -rw-r--r-- | src/atomic_ops/sysdeps/gcc/arm.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/atomic_ops/sysdeps/gcc/arm.h b/src/atomic_ops/sysdeps/gcc/arm.h index 9b05216..18a6355 100644 --- a/src/atomic_ops/sysdeps/gcc/arm.h +++ b/src/atomic_ops/sysdeps/gcc/arm.h @@ -47,7 +47,8 @@ && ((!defined(__ARM_ARCH_5__) && !defined(__ARM_ARCH_5E__) \ && !defined(__ARM_ARCH_5T__) && !defined(__ARM_ARCH_5TE__) \ && !defined(__ARM_ARCH_5TEJ__) && !defined(__ARM_ARCH_6M__)) \ - || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__)) + || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \ + || defined(__ARM_ARCH_8A__)) # define AO_ARM_HAVE_LDREX # if !defined(__ARM_ARCH_6__) && !defined(__ARM_ARCH_6J__) \ && !defined(__ARM_ARCH_6T2__) @@ -73,9 +74,10 @@ #endif /* ARMv6+ */ #if !defined(__ARM_ARCH_2__) && !defined(__ARM_ARCH_6M__) \ - && !defined(__thumb2__) + && !defined(__ARM_ARCH_8A__) && !defined(__thumb2__) # define AO_ARM_HAVE_SWP /* Note: ARMv6M is excluded due to no ARM mode support. */ + /* Also, SWP is obsoleted for ARMv8+. */ #endif /* !__thumb2__ */ #ifdef AO_UNIPROCESSOR @@ -440,6 +442,8 @@ AO_xor(volatile AO_t *p, AO_t value) " ldrex %1, [%3]\n" /* get original */ " teq %1, %4\n" /* see if match */ # ifdef __thumb2__ + /* TODO: Eliminate warning: it blocks containing wide Thumb */ + /* instructions are deprecated in ARMv8. */ " it eq\n" # endif " strexeq %0, %5, [%3]\n" /* store new one if matched */ |