kolibrios-fun/programs/system/os/fpo.inc

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; Magic for proc32.inc: prologue/epilogue for esp-based addressing
; fpo stands from Frame Pointer Omission
macro fpo_prologue procname,flag,parmbytes,localbytes,reglist
{
local loc,regcount
loc = (localbytes+3) and (not 3)
regcount = 0
irps reg, reglist
\{
regcount = regcount+1
push reg
\}
parmbase@proc equ esp+4+regcount*4
localbase@proc equ esp-localbytes
}
macro fpo_epilogue procname,flag,parmbytes,localbytes,reglist
{
irps reg, reglist \{ reverse pop reg \}
if flag and 10000b
retn
else
retn parmbytes
end if
}