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

__builtin_clr_prefetch
Argument: xptr Integer pointer to x prefetch.
xval Integer value of x prefetch.
xincr Integer increment value of x prefetch.
yptr Integer pointer to y prefetch.
yval Integer value of y prefetch.
yincr Integer increment value of y prefetch.
AWB Accumulator selection.
Return Value: Returns the cleared value result to an accumulator.
Assembler Operator
/ Machine
Instruction:
clr
Error Messages An error message will be displayed if:
• the result is not an accumulator register
• xval is a null value but xptr is not null
• yval is a null value but yptr is not null
__builtin_divf
Built-in Functions
Description: Computes the quotient num / den. A math error exception occurs if den
is zero. Function arguments are unsigned, as is the function result.
Prototype: unsigned int __builtin_divf(unsigned int num,
unsigned int den);
Argument: num numerator
den denominator
Return Value: Returns the unsigned integer value of the quotient num / den.
Assembler Operator
/ Machine
Instruction:
div.f
__builtin_divmodsd
Description: Issues the 16-bit architecture’s native signed divide support with the
same restrictions given in the “dsPIC30F/33F Programmer’s Reference
Manual” (DS70157). Notably, if the quotient does not fit into a 16-bit
result, the results (including remainder) are unexpected. This form of
the builtin function will capture both the quotient and remainder.
Prototype: signed int __builtin_divmodsd(
signed long dividend, signed int divisor,
signed int *remainder);
Argument: dividendnumber to be divided
divisornumber to divide by
remainderpointer to remainder
Return Value: Quotient and remainder.
Assembler Opera- divmodsd
tor / Machine
Instruction:
Error Messages None.
© 2008 Microchip Technology Inc. DS51284G-page 145