Notes on porting the perl runtime PP engine.
Importance: 1 = who cares?, 10 = vital
Difficulty: 1 = trivial, 10 = very difficult. Level assumes a
reasonable implementation of the SV and OP API already ported.

OP		Import	Diff	Comments
null		10	1
stub		10	1
scalar		10	1
pushmark	10	1	PUSHMARK
wantarray	7	3	cxstack, dopoptosub
const		10	1	
gvsv		10	1	save_scalar
gv		10	1	
gelem		3	3	
padsv		10	2	SAVECLEARSV, provide_ref
padav		10	2
padhv		10	2
padany		1	1
pushre		7	3	pushes an op. Blech.
rv2gv		6	5
rv2sv		10	4
av2arylen	7	3	sv_magic	
rv2cv		8	5	sv_2cv
anoncode	7	6	cv_clone
prototype	4	4	sv_2cv
refgen		8	3
srefgen		8	2
ref		8	3
bless		7	3
backtick	5	4
glob		5	2	do_readline
readline	8	2	do_readline	
rcatline	8	2
regcmaybe	8	1
regcreset	8	1
regcomp		8	9	pregcomp
match		8	10
qr		8	1
subst		8	10
substcont	8	7
trans		7	4	do_trans
sassign		10	3	mg_find, SvSETMAGIC
aassign		10	5	
chop		8	3	do_chop
schop		8	3	do_chop
chomp		8	3	do_chomp
schomp		8	3	do_chomp
defined		10	2
undef		10	3
study		4	5
pos		8	3	PVLV, mg_find
preinc		10	2	sv_inc, SvSETMAGIC
i_preinc
predec		10	2	sv_dec, SvSETMAGIC
i_predec
postinc		10	2	sv_dec, SvSETMAGIC
i_postinc
postdec		10	2	sv_dec, SvSETMAGIC
i_postdec
pow		10	1
multiply	10	1
i_multiply	10	1
divide		10	2
i_divide	10	1
modulo		10	2
i_modulo	10	1
repeat		6	4
add		10	1
i_add		10	1
subtract	10	1
i_subtract	10	1
concat		10	2	mg_get
stringify	10	2	sv_setpvn
left_shift	10	1
right_shift	10	1
lt		10	1
i_lt		10	1
gt		10	1
i_gt		10	1
le		10	1
i_le		10	1
ge		10	1
i_ge		10	1
eq		10	1
i_eq		10	1
ne		10	1
i_ne		10	1
ncmp		10	1
i_ncmp		10	1
slt		10	2
sgt		10	2
sle		10	2
sge		10	2
seq		10	2	sv_eq
sne		10	2
scmp		10	2
bit_and		10	2
bit_xor		10	2
bit_or		10	2
negate		10	3
i_negate	10	1
not		10	1
complement	10	3
atan2		6	1
sin		6	1
cos		6	1
rand		5	2
srand		5	2
exp		6	1
log		6	2
sqrt		6	2
int		10	2
hex		9	2
oct		9	2
abs		10	1
length		10	1
substr		10	4	PVLV
vec		5	4
index		9	3
rindex		9	3
sprintf		9	4	do_sprintf
formline	6	7
ord		6	2	
chr		6	2
crypt		3	2
ucfirst		6	2
lcfirst		6	2
uc		6	2
lc		6	2
quotemeta	6	3
rv2av		10	3	save_svref, mg_get, save_ary
aelemfast	10	2	av_fetch
aelem		10	3
aslice		9	4
each		10	3	hv_iternext
values		10	3	do_kv
keys		10	3	do_kv
delete		10	3
exists		10	3
rv2hv		10	3	save_svref, mg_get, save_ary, do_kv
helem		10	3	save_svref, provide_ref
hslice		9	4
unpack		9	6	lengthy
pack		9	6	lengthy
split		9	9
join		10	4	do_join
list		10	2
lslice		9	4
anonlist	10	2
anonhash	10	3
splice		9	6
push		10	2
pop		10	2
shift		10	2
unshift		10	2
sort		6	7
reverse		9	4
grepstart	6	5	modifies flow of control
grepwhile	6	5	modifies flow of control
mapstart	1	1
mapwhile	6	5	modifies flow of control
range		7	3	modifies flow of control
flip		7	4	modifies flow of control
flop		7	4	modifies flow of control
and		10	3	modifies flow of control
or		10	3	modifies flow of control
xor
cond_expr	10	3	modifies flow of control
andassign	7	3	modifies flow of control
orassign	7	3	modifies flow of control
method		8	5
entersub	10	7
leavesub	10	5
leavesublv
caller		2	8
warn		9	3
die		9	3
reset		2	2
lineseq		1	1
nextstate	10	1	Update stack_sp from cxstack. FREETMPS.
dbstate		3	7		
unstack
enter		10	3	cxstack, ENTER, SAVETMPS, PUSHBLOCK
leave		10	3	cxstack, SAVETMPS, LEAVE, POPBLOCK
scope		1	1
enteriter	9	4	cxstack
iter		9	3	cxstack
enterloop	10	4
leaveloop	10	4
return		10	5
last		9	6
next		9	6
redo		9	6
dump		1	9	pp_goto
goto		6	9
exit		9	2	my_exit
open		9	5	do_open
close		9	3	do_close
pipe_op		7	4
fileno		9	2
umask		4	2
binmode		4	2
tie		5	5	pp_entersub
untie		5	2	sv_unmagic
tied		5	2
dbmopen		4	5
dbmclose	4	2
sselect		4	4
select		7	3
getc		7	2
read		8	2	pp_sysread
enterwrite	4	4	doform
leavewrite	4	5
prtf		4	4	do_sprintf
print		8	6
sysopen		8	2
sysseek		8	2
sysread		8	4
syswrite	8	4	pp_send
send		8	4
recv		8	4	pp_sysread
eof		9	2
tell		9	3
seek		9	2
truncate	8	3
fcntl		8	4	pp_ioctl
ioctl		8	4
flock		8	2
socket		5	3
sockpair	5	3
bind		5	3
connect		5	3
listen		5	3
accept		5	3
shutdown	5	2
gsockopt	5	3	pp_ssockopt
ssockopt	5	3
getsockname	5	3	pp_getpeername
getpeername	5	3
lstat		5	4	pp_stat
stat		5	4	lengthy
ftrread		5	2	cando
ftrwrite	5	2	cando
ftrexec		5	2	cando
fteread		5	2	cando
ftewrite	5	2	cando
fteexec		5	2	cando
ftis		5	2	cando
fteowned	5	2	cando
ftrowned	5	2	cando
ftzero		5	2	cando
ftsize		5	2	cando
ftmtime		5	2	cando
ftatime		5	2	cando
ftctime		5	2	cando
ftsock		5	2	cando
ftchr		5	2	cando
ftblk		5	2	cando
ftfile		5	2	cando
ftdir		5	2	cando
ftpipe		5	2	cando
ftlink		5	2	cando
ftsuid		5	2	cando
ftsgid		5	2	cando
ftsvtx		5	2	cando
fttty		5	2	cando
fttext		5	4
ftbinary	5	4	fttext
chdir
chown
chroot
unlink
chmod
utime
rename
link
symlink
readlink
mkdir
rmdir
open_dir
readdir
telldir
seekdir
rewinddir
closedir
fork
wait
waitpid
system
exec
kill
getppid
getpgrp
setpgrp
getpriority
setpriority
time
tms
localtime
gmtime
alarm
sleep
shmget
shmctl
shmread
shmwrite
msgget
msgctl
msgsnd
msgrcv
semget
semctl
semop
require		6	9	doeval
dofile		6	9	doeval
entereval	6	9	doeval
leaveeval	6	5
entertry	7	4	modifies flow of control
leavetry	7	3
ghbyname
ghbyaddr
ghostent
gnbyname
gnbyaddr
gnetent
gpbyname
gpbynumber
gprotoent
gsbyname
gsbyport
gservent
shostent
snetent
sprotoent
sservent
ehostent
enetent
eprotoent
eservent
gpwnam
gpwuid
gpwent
spwent
epwent
ggrnam
ggrgid
ggrent
sgrent
egrent
getlogin
syscall
lock		6	1
threadsv	6	2	unused if not USE_THREADS
setstate	1	1	currently unused anywhere
method_named	10	2
