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powerpc: Add PPC_STACK_ALIGN_POWER

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Simplify PPC_STACK_ALIGNMENT definition.
This commit is contained in:
Sebastian Huber
2014-12-23 11:46:08 +01:00
parent 7c16e1a514
commit 0d0095f1f0
1 changed files with 6 additions and 16 deletions
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22
cpukit/score/cpu/powerpc/rtems/score/powerpc.h
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@@ -108,23 +108,13 @@ extern "C" {
#define PPC_ABI PPC_ABI_EABI
#endif
#if (PPC_ABI == PPC_ABI_SVR4) || defined(__ALTIVEC__)
#define PPC_STACK_ALIGNMENT 16
#elif (PPC_ABI == PPC_ABI_EABI)
#if 1
/* Till.S: 2008/07/10; AFAIK, the CPU_STACK_ALIGNMENT is only
* used to align the top of the stack. We don't lose much
* if we always align TOS to 16-bytes but we then are always
* OK, even if the user tells the compiler to generate 16-byte
* alignment.
/*
* Use worst case stack alignment. For the EABI an 8-byte alignment would be
* sufficient.
*/
#define PPC_STACK_ALIGNMENT 16
#else
#define PPC_STACK_ALIGNMENT 8
#endif
#else
#error "PPC_ABI is not properly defined"
#endif
#define PPC_STACK_ALIGN_POWER 4
#define PPC_STACK_ALIGNMENT (1 << PPC_STACK_ALIGN_POWER)
/*
* Assume PPC_HAS_FPU to be a synonym for _SOFT_FLOAT.