Register | AAPCS Purpose | MECRISP Forth Purpose |
---|---|---|
r0 | Argument, result, scratch register 1 | Scratch |
r1 | Argument, result, scratch register 2 | Scratch |
r2 | Argument, scratch register 3 | Scratch |
r3 | Argument, scratch register 4 | Scratch |
r12 | Intra-procedure-call scratch register | |
r14 | Link register (LR) | Link register (LR) |
r9 | Platform register (usage defined by platform in use) | |
r15 | Program counter (PC) | Program counter (PC) |
r13 | Stack pointer (SP) | Stack pointer (SP) |
r4 | Variable register 1 | |
r5 | Variable register 2 | |
r6 | Variable register 3 | Top Of Stack TOS |
r7 | Variable register 4 | Data Stack |
r8 | Variable register 5 | |
r10 | Variable register 7 | |
r11 | Variable register 8 |