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

__builtin_modsd
Argument: dividend number to be divided
divisor number to divide by
Return Value: Remainder.
Assembler Operator
/ Machine
Instruction:
modsd
Error Messages None.
__builtin_modud
Built-in Functions
Description: Issues the 16-bit architecture’s native unsigned 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 only the remainder.
Prototype: unsigned int __builtin_modud(unsigned long dividend,
unsigned int divisor);
Argument: dividendnumber to be divided
divisornumber to divide by
Return Value: Remainder.
Assembler Opera- modud
tor / Machine
Instruction:
Error Messages None.
__builtin_movsac
Description: Computes nothing, but prefetchs data ready for a future MAC
operation.
xptr may be null to signify no X prefetch to be performed, in which
case the values of xincr and xval are ignored, but required.
yptr may be null to signify no Y prefetch to be performed, in which
case the values of yincr and yval are ignored, but required.
xval and yval nominate the address of a C variable where the
prefetched value will be stored.
xincr and yincr may be the literal values: -6, -4, -2, 0, 2, 4, 6 or an
integer value.
If AWB is non null, the other accumulator will be written back into the
referenced variable.
For example:
register int result asm("A");
int *xmemory;
int *ymemory;
int xVal, yVal;
result = __builtin_movsac(&xmemory, &xVal, 2,
&ymemory, &yVal, 2, 0);
might generate:
movsac A, [w8]+=2, w4, [w10]+=2, w5
Prototype: int __builtin_movsac(
int **xptr, int *xval, int xincr,
int **yptr, int *yval, int yincr, int *AWB);
© 2008 Microchip Technology Inc. DS51284G-page 151