| The current Alpha chips don't provide hardware for integer | |
| division. The C compiler expects the functions | |
| __divqu: 64-bit unsigned long divide | |
| __remqu: 64-bit unsigned long remainder | |
| __divq/__remq: signed 64-bit | |
| __divlu/__remlu: unsigned 32-bit | |
| __divl/__reml: signed 32-bit | |
| These are not normal C functions: instead of the normal calling | |
| sequence, these expect their arguments in registers t10 and t11, and | |
| return the result in t12 (aka pv). Register AT may be clobbered | |
| (assembly temporary), anything else must be saved. | |
| Furthermore, the return address is in t9 instead of ra. | |
| Normal function Divide functions | |
| --------------- ---------------- | |
| v0 ($0) t12/pv ($27) | |
| a0 ($16) t10 ($24) | |
| a1 ($17) t11 ($25) | |
| ra ($26) t9 ($23) | |