Intrinsics are pseudo-function that are expanded into code within the
compiler; there are no macros that provide them. Check for features
like this by comparing the mspgcc release version with when the
feature was added:
#if 20110809 <= __MSPGCC__
/* __delaycycles up to 2^32-1 supported */
#elif 20110716 <= __MSPGCC__
/* __delaycycles up to about 198000 supported */
#else
/* __delaycycles not supported */
#endif
Peter
On Thu, Mar 8, 2012 at 11:24 AM, Don Bindner <don.bind...@gmail.com> wrote:
> I do coding on both the 4.4.5 compiler, which does not have the
> __delay_cycles() intrinsic function, and on the 4.5.3 compiler which does.
> I'd sometimes like code that compiles on either, and the actual delay
> amounts aren't necessarily critical (they just have to occur).
>
> I'd like to do something like the following:
>
> #ifndef __delay_cycles
> /* A crude delay function. */
> inline void __delay_cycles( unsigned long int delay ) {
> volatile unsigned int i = delay/3;
> while( i-- ) ;
> }
> #endif
>
> But even when the intrinsic function is available, the #ifndef triggers.
> Is there some reliable way to test for the intrinsic?
>
> Don
>
> ------------------------------------------------------------------------------
> Virtualization & Cloud Management Using Capacity Planning
> Cloud computing makes use of virtualization - but cloud computing
> also focuses on allowing computing to be delivered as a service.
> http://www.accelacomm.com/jaw/sfnl/114/51521223/
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------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
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