DSP56xxx C Cross-Compiler User's Guide - Tasking

Run–time Environment 7–9_compatibleFamilyMemberParameterRegistersRegisters to bepreserved by calleeReturn RegisterDSP5600xNone (all on stack)When returning astruct/union, Apoints to the addressto store it.B1, B0, X1, X0, Y1,Y0, R0..R5, R7(R7 is replaced byR6 if R7 is used foruser stack pointer)A, except whenreturning astruct/union; inthat case A pointsto the addresswhere it is storedDSP563xxDSP566xxA,B (rest on stack)When returning astruct/union, R7points to the addressto store it.Y1, Y0, R2/N2,R3/N3, R7/N7(R7/N7 are replacedby R6/N6 if R7 isused for user stackpointer)A, except whenreturning astruct/union; inthat case R7points to theaddress where it isstored_callee_save_callee_save#ifndef _CALLEE_SAVE#define _who_saves#else#define _who_saves _callee_save#endifint i;_who_saves void __inc(void){i++;}• • • • • • • •