MPLAB C Compiler for PIC24 MCUs and dsPIC DSCs ... - Microchip

__builtin_fbcl
Built-in Functions
Argument: valueInteger number of first bit change.
Return Value: Returns the shifted addition result to an accumulator.
Assembler Opera- fbcl
tor / Machine
Instruction:
Error Messages An error message will be displayed if the result is not an accumulator
register.
__builtin_lac
Description: Shifts value by shift (a literal between -8 and 7) and returns the value
to be stored into the accumulator register. For example:
register int result asm("A");
int value;
result = __builtin_lac(value,3);
Might generate:
lac w4, #3, A
Prototype: int __builtin_lac(int value, int shift);
Argument: valueInteger number to be shifted.
shiftLiteral amount to shift.
Return Value: Returns the shifted addition result to an accumulator.
Assembler Opera- lac
tor / Machine
Instruction:
Error Messages An error message will be displayed if:
• the result is not an accumulator register
• the shift value is not a literal within range
© 2008 Microchip Technology Inc. DS51284G-page 149