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#ifndef STACK_EMULATION_H_
#define STACK_EMULATION_H_
#include "gpr.inc"
/* Push a value (can be anything that's valid as operand) to the stack */
#define PUSH(value) \
mov value, [0, OFFR_STACKPTR]; /* Save the value on the stack */ \
sub BASER_STACKPTR, 1, BASER_STACKPTR; /* Decrement stack pointer */
/* Helpers to push the link registers to the stack */
#define __PUSH_LR(nr) PUSH(SPR_PC##nr);
#define PUSH_LR0 __PUSH_LR(0)
#define PUSH_LR1 __PUSH_LR(1)
#define PUSH_LR2 __PUSH_LR(2)
#define PUSH_LR3 __PUSH_LR(3)
/* Pop the last entry from the stack and save it in the register */
#define POP(register) \
add BASER_STACKPTR, 1, BASER_STACKPTR; /* Increment stack pointer */ \
mov [0, OFFR_STACKPTR], register; /* Restore the value from the stack */
/* Helpers to pop values from the stack to the link registers */
#define __POP_LR(nr) POP(SPR_PC##nr); mov SPR_PC##nr, 0;
#define POP_LR0 __POP_LR(0)
#define POP_LR1 __POP_LR(1)
#define POP_LR2 __POP_LR(2)
#define POP_LR3 __POP_LR(3)
#endif /* STACK_EMULATION_H_ */
// vim: syntax=b43 ts=8
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