176 lines
3.3 KiB
Plaintext
Executable File
176 lines
3.3 KiB
Plaintext
Executable File
#
|
|
;
|
|
; (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
; See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
;
|
|
|
|
;
|
|
; Module: coroutine primitives
|
|
; Author: Kees Bot, Edwin Scheffer, Ceriel Jacobs
|
|
; Version: $Header$
|
|
;
|
|
|
|
mes 2,_EM_WSIZE,_EM_PSIZE
|
|
|
|
; topsize takes care of two things:
|
|
; - given a stack-break,
|
|
; it computes the size of the chunk of memory needed to save the stack;
|
|
; - also, if this stack-break = 0, it creates one, assuming that caller is
|
|
; the stack-break.
|
|
;
|
|
; This implementation assumes a continuous stack growing downwards
|
|
|
|
exp $topsize
|
|
#ifdef __sparc
|
|
inp $topsize2
|
|
pro $topsize, 0
|
|
mes 11
|
|
zer _EM_PSIZE
|
|
lal 0
|
|
loi _EM_PSIZE
|
|
cal $topsize2
|
|
asp 2*_EM_PSIZE
|
|
lfr _EM_WSIZE
|
|
ret _EM_WSIZE
|
|
end 0
|
|
pro $topsize2, (3*_EM_WSIZE+3*_EM_PSIZE)
|
|
#else
|
|
pro $topsize, (3*_EM_WSIZE+3*_EM_PSIZE)
|
|
#endif
|
|
; local space for line-number, ignoremask, filename, stack-break, size,
|
|
; and stack-pointer (see the topsave routine)
|
|
mes 11
|
|
lal 0
|
|
loi _EM_PSIZE
|
|
loi _EM_PSIZE ; stack-break or 0
|
|
zer _EM_PSIZE
|
|
cmp
|
|
zne *1
|
|
lxl 0
|
|
dch ; local base of caller
|
|
#ifdef __sparc
|
|
dch ; because of the extra layer
|
|
#endif
|
|
lal 0
|
|
loi _EM_PSIZE
|
|
sti _EM_PSIZE
|
|
1
|
|
lal 0
|
|
loi _EM_PSIZE
|
|
loi _EM_PSIZE
|
|
lpb ; convert this local base to an argument base.
|
|
; An implementation of a sort of "topsize" EM
|
|
; instruction should take a local base, and save
|
|
; the whole frame.
|
|
|
|
lor 1 ; stack-break SP
|
|
sbs _EM_WSIZE ; stack-break-SP
|
|
ret _EM_WSIZE ; return size of block to be saved
|
|
end 3*_EM_WSIZE+3*_EM_PSIZE
|
|
|
|
exp $topsave
|
|
#ifdef __sparc
|
|
inp $topsave2
|
|
pro $topsave,0
|
|
mes 11
|
|
lal 0
|
|
loi 2*_EM_PSIZE
|
|
cal $topsave2
|
|
asp 2*_EM_PSIZE
|
|
lfr _EM_WSIZE
|
|
ret _EM_WSIZE
|
|
end 0
|
|
pro $topsave2,0
|
|
#else
|
|
pro $topsave, 0
|
|
#endif
|
|
mes 11
|
|
loe 0
|
|
lae 4 ; load line number and file name
|
|
loi _EM_PSIZE
|
|
lim ; ignore mask
|
|
lor 0 ; LB
|
|
lal 0
|
|
loi _EM_PSIZE ; stack-break
|
|
lpb
|
|
lor 1
|
|
sbs _EM_WSIZE
|
|
loc _EM_WSIZE
|
|
adu _EM_WSIZE ; gives size
|
|
dup _EM_WSIZE
|
|
stl 0 ; save size
|
|
lor 1 ; SP (the SP BEFORE pushing)
|
|
lor 1 ; SP (address of stack top to save)
|
|
lal _EM_PSIZE ; area
|
|
loi _EM_PSIZE
|
|
lol 0 ; size
|
|
bls _EM_WSIZE ; move whole block
|
|
asp 3*_EM_PSIZE+3*_EM_WSIZE ; remove the lot from the stack
|
|
loc 1
|
|
ret _EM_WSIZE ; return 1
|
|
end 0
|
|
|
|
sv
|
|
bss _EM_PSIZE,0,0
|
|
|
|
exp $topload
|
|
#ifdef __sparc
|
|
inp $topload1
|
|
pro $topload,0
|
|
lal 0
|
|
loi _EM_PSIZE
|
|
cal $topload1
|
|
asp _EM_PSIZE
|
|
lfr _EM_WSIZE
|
|
ret _EM_WSIZE
|
|
end 0
|
|
pro $topload1, 0
|
|
#else
|
|
pro $topload, 0
|
|
#endif
|
|
mes 11
|
|
|
|
lal 0
|
|
loi _EM_PSIZE
|
|
lae sv
|
|
sti _EM_PSIZE ; saved parameter
|
|
|
|
lxl 0
|
|
2
|
|
dup _EM_PSIZE
|
|
adp -3*_EM_PSIZE
|
|
lal 0
|
|
loi _EM_PSIZE ; compare target SP with current LB to see if we must
|
|
loi _EM_PSIZE
|
|
cmp ; find another LB first
|
|
zgt *1
|
|
dch ; just follow dynamic chain to make sure we find
|
|
; a legal one
|
|
bra *2
|
|
1
|
|
str 0
|
|
|
|
lae sv
|
|
loi _EM_PSIZE
|
|
loi _EM_PSIZE ; load indirect to
|
|
str 1 ; restore SP
|
|
asp 0-_EM_PSIZE ; to stop int from complaining about non-existent memory
|
|
lae sv
|
|
loi _EM_PSIZE ; source address
|
|
lor 1
|
|
adp _EM_PSIZE ; destination address
|
|
lae sv
|
|
loi _EM_PSIZE
|
|
adp _EM_PSIZE
|
|
loi _EM_WSIZE ; size of block
|
|
bls _EM_WSIZE
|
|
asp _EM_PSIZE+_EM_WSIZE ; drop size + SP
|
|
str 0 ; restore local base
|
|
sim ; ignore mask
|
|
lae 4
|
|
sti _EM_PSIZE
|
|
ste 0 ; line and file
|
|
loc 0
|
|
ret _EM_WSIZE
|
|
end 0
|