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Error for automatic generation of DSP instruction

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karanbanthia

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Hi all,
I have the following line of code perfectly working in Microchip C30 compiler but gives an error in Microchip xc16 compiler saying
"Automatic generation of DSP instructions not yet supported; use __builtin_ addab() instead"
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Code: 
volatile register int accuA asm("A");
 
accuA = __builtin_add(accuA,(*ptempDest).real+(*ptempSource2).real,0);

where ptempDest and ptempSource2 are pointers to fractcomplex source of data located in RAM. I am using dsPIC30F6012A.
Kindly help.
 

The error message suggests to use another __builtin_xx call instead of the "+" operator, which isn't supported for this data type.
 

__builtin_add() works perfectly as per the code that i have posted in the old microchip c30 compiler but not in xc16 compiler.
xc16 compiler instead suggests to use __builtin_addab() which is not suitable for my code. What other option do I have?
 

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