Dan Sugalski <[EMAIL PROTECTED]> wrote: > At 7:34 PM +0100 11/17/04, Leopold Toetsch wrote:
>>All registers are preserved, but some of these registers are used, >>either by implict opcodes or as return values. > Erm, no. Unused registers in the 0-15 range are explicitly garbage: It was about usabalitiy of registers for the allocator. So before I make a function call, these are allocatable as temps. Return values are garbage, if not set. > Note that registers 16-31 of each of the four types are, for > security reasons, I<never> passed into the invoked subroutine, > method, or continuation. They are guaranteed to be garbage. Not quite. S and P regs have to be NULLed. Or you gonna tell the DOD system how to mark garbage ;) >> > * Registers P4, S1-S4, N0-N4 are free for allocation, regardless. >> >>I've included P3 (see below). If it's used it interfers. > Nope. It'll either be set if a call returns overflow parameters, or > unused and thus garbage. Ah, yep. Thanks. It is returned too, forgot that. leo
