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Re: [PATCH roland/arm-vfp] Test [__VFP_FP__] in place of [!__SOFTFP__].

On 8/22/2012 4:54 PM, Joseph S. Myers wrote:
> On Wed, 22 Aug 2012, Roland McGrath wrote:
> 
>> The compiler predefines __SOFTFP__ to indicate that the calling convention
>> is the one using only integer registers.
> 
> No, this indicates that it is not generating floating-point instructions.  
> It defines __SOFTFP__ only for -mfloat-abi=soft, not -mfloat-abi=softfp (= 
> hardware floating point but using integer registers in the calling 
> convention) or -mfloat-abi=hard.
> 
>> It predefines __VFP_FP__ to
>> indicate that it is configured to generate VFP instructions.
> 
> No, this indicates that floating-point types have VFP layout as opposed to 
> FPA layout.  For an EABI compiler, all three of -mfloat-abi=soft, 
> -mfloat-abi=softp and -mfloat-abi=hard predefine __VFP_FP__.
> 
> The predefine that relates to the calling convention is __ARM_PCS_VFP.
 
For which we also define HAVE_ARM_PCS_VFP.

Cheers,
Carlos.
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