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ez80.alm
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ez80.alm
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define @ez80 @ez80
element @ez80.dummy
@ez80.unique = 0
element @ez80.breg
element b?: @ez80.breg * 003o + 030o
element nz?: @ez80.breg * 010o + 001o
element z?: @ez80.breg * 010o + 011o
element nc?: @ez80.breg * 010o + 021o
element c?: @ez80.breg * 003o + 031o
element po?: @ez80.breg * 010o + 041o
element pe?: @ez80.breg * 010o + 051o
nv? = po?
v? = pe?
element p?: @ez80.breg * 010o + 061o
element m?: @ez80.breg * 010o + 071o
element d?: @ez80.breg * 003o + 032o
element e?: @ez80.breg * 003o + 033o
element h?: @ez80.breg * 003o + 034o
element ixh?: @ez80.breg * 335o + 034o
element iyh?: @ez80.breg * 375o + 034o
element l?: @ez80.breg * 003o + 035o
element ixl?: @ez80.breg * 335o + 035o
element iyl?: @ez80.breg * 375o + 035o
element f?: @ez80.breg * 002o + 036o
element a?: @ez80.breg * 003o + 037o
element @ez80.irmb
element i?: @ez80.irmb * 107o + 127o
element r?: @ez80.irmb * 117o + 137o
element mb?: @ez80.irmb * 155o + 156o
element @ez80.wreg
element bc?: @ez80.wreg * 007o + 000o
element de?: @ez80.wreg * 007o + 020o
element hl?: @ez80.wreg * 007o + 040o
element ix?: @ez80.wreg * 335o + 040o
element iy?: @ez80.wreg * 375o + 040o
element sp?: @ez80.wreg * 006o + 060o
element af?: @ez80.wreg * 001o + 060o
element af'? ;'
calminstruction assume? value&
match =adl? == value, value
jno chain
compute value, value
check value and not 1
jyes errassume
compute @ez80.l, value * 11o
compute @ez80.il, value * 22o
compute @ez80.ws, value + word?
compute @ez80.adl, value
exit
errassume:
err 'invalid assume adl, expected 0 or 1'
exit
chain:
execute =assume? value
end calminstruction
assume? adl = 1
?long? = 3
iterate <name,size,cond>, w,word,no, l,long,yes
calminstruction d#name? data*&
proxy current
local count, sequence, duplicate
check @ez80.adl
j#cond repeatend
execute =emit? =size?: data
exit
loop:
arrange count, current, 0
arrange sequence,
arrange data,
match count =dup? sequence, current, ()
match sequence =, data, sequence, ()
match current =, count, count, ()
jno splitend
splitloop:
match ?, current
jyes splitreserve
execute =@ez80.=word =size?, @current
jump splitnext
splitreserve:
execute =rl? 1
splitnext:
match current =, count, count, ()
jyes splitloop
splitend:
compute count, count
check count
jno repeatend
repeatloop:
match ?, current
arrange duplicate, sequence
match ( duplicate ), sequence
repeatsplitloop:
split current, duplicate
match ?, current
jyes repeatreserve
execute =@ez80.=word =size?, @current
jump repeatnext
repeatreserve:
execute =rl? 1
repeatnext:
jyes repeatsplitloop
compute count, count - 1
check count
jyes repeatloop
repeatend:
match current, data
jyes loop
end calminstruction
calminstruction r#name? count*
execute =emit? =size?: count =dup ?
end calminstruction
iterate type, d, r
calminstruction (label) type#name? parameters&
execute =label label: =size?
execute =type#=name parameters
end calminstruction
end iterate
end iterate
calminstruction @ez80.word size*, value*
emit size, value
end calminstruction
calminstruction @ez80.calminstruction name&
local suffix, parameters, instructions
once arrange instructions, @ez80.instructions
match name suffix, name
arrange name, name=?
check definite name
jyes definite
publish name, @ez80.dummy
definite:
arrange parameters,
match suffix= parameters, suffix
match ., suffix
jyes nosuffix
arrange name, name#suffix
nosuffix:
publish :instructions, name
execute =calminstruction name parameters
end calminstruction
macro ?! isreg: metadata 1 element 1 eq @ez80
local size, value
macro calminstruction?.isindirect? argument*
unique done
local isindirect
match ( isindirect ), argument
bno done
match isindirect, isindirect, ()
label done
end macro
macro calminstruction?.indexprefix? argument*
unique done
local index
compute index, argument metadata 1 scale 1
check index > 300o
bno done
emit 1, index
label done
end macro
macro calminstruction?.indexoffset? argument*
unique errrange, index, done
local offset
compute offset, argument scale 0
byes index
check offset
bno done
err 'invalid offset'
exit
label errrange
err 'offset out of range'
exit
label index
check offset >= -200o & offset < 200o
bno errrange
emit 1, offset
label done
end macro
macro calminstruction?.regsize? result*, reg*
unique word, done
check reg isreg.wreg
byes word
compute result, byte?
branch done
label word
compute result, @ez80.ws
label done
end macro
iterate <suffixsize,suffixname,suffixencoding,suffixadjustment, wordsize>, \
2, , , ,=@ez80.=ws, \
3, s?, 100o, il,=@ez80.=ws, \
3, l?, 111o, il,=@ez80.=ws, \
3, is?, 100o, l , =word?, \
3, il?, 122o, l , =long?, \
3, sis?, 100o, , =word?, \
3, lis?, 111o, , =word?, \
3, sil?, 122o, , =long?, \
3, lil?, 133o, , =long?
match adjustment, suffixadjustment
macro calminstruction?.emitsuffix?
emit 1, suffixencoding or @ez80.adjustment
end macro
else match encoding, suffixencoding
macro calminstruction?.emitsuffix?
emit 1, suffixencoding
end macro
else
macro calminstruction?.emitsuffix?
end macro
end match
iterate <name*, encoding*>, \
nop ,< 000o>, \
rlca ,< 007o>, \
rrca ,< 017o>, \
rla ,< 027o>, \
rra ,< 037o>, \
daa ,< 047o>, \
cpl ,< 057o>, \
scf ,< 067o>, \
ccf ,< 077o>, \
halt ,< 166o>, \
exx ,< 331o>, \
di ,< 363o>, \
ei ,< 373o>, \
neg ,<355o, 104o>, \
retn ,<355o, 105o>, \
reti ,<355o, 115o>, \
rrd ,<355o, 147o>, \
rld ,<355o, 157o>, \
slp ,<355o, 166o>, \
stmix ,<355o, 175o>, \
rsmix ,<355o, 176o>, \
inim ,<355o, 202o>, \
otim ,<355o, 203o>, \
ini2 ,<355o, 204o>, \
indm ,<355o, 212o>, \
otdm ,<355o, 213o>, \
ind2 ,<355o, 214o>, \
inimr ,<355o, 222o>, \
otimr ,<355o, 223o>, \
ini2r ,<355o, 224o>, \
indmr ,<355o, 232o>, \
otdmr ,<355o, 233o>, \
ind2r ,<355o, 234o>, \
ldi ,<355o, 240o>, \
cpi ,<355o, 241o>, \
ini ,<355o, 242o>, \
outi ,<355o, 243o>, \
outi2 ,<355o, 244o>, \
ldd ,<355o, 250o>, \
cpd ,<355o, 251o>, \
ind ,<355o, 252o>, \
outd ,<355o, 253o>, \
outd2 ,<355o, 254o>, \
ldir ,<355o, 260o>, \
cpir ,<355o, 261o>, \
inir ,<355o, 262o>, \
otir ,<355o, 263o>, \
oti2r ,<355o, 264o>, \
lddr ,<355o, 270o>, \
cpdr ,<355o, 271o>, \
indr ,<355o, 272o>, \
otdr ,<355o, 273o>, \
otd2r ,<355o, 274o>, \
inirx ,<355o, 302o>, \
otirx ,<355o, 303o>, \
indrx ,<355o, 312o>, \
otdrx ,<355o, 313o>
virtual
match suffix, suffixencoding
emit 1: suffix
end match
emit 1: encoding
size = $ - $$
load value: size from $$
end virtual
repeat 1, size: size, value: value
match adjustment, suffixadjustment
@ez80.calminstruction name.suffixname
emit size, value or @ez80.adjustment
end calminstruction
else
@ez80.calminstruction name.suffixname
emit size, value
end calminstruction
end match
end repeat
end iterate
iterate name, inc, dec
repeat 1, wordencoding: % shl 3 - 005o, byteencoding: % + 003o, \
indirectencoding: % + 063o
@ez80.calminstruction name.suffixname lhs*
isindirect lhs
compute lhs, lhs
jyes indirect
emitsuffix
indexprefix lhs
check lhs isreg.wreg & lhs metadata 1 scale 1 and 004o
jno byte
emit 1, lhs metadata 1 scale 0 + wordencoding
exit
byte:
check lhs isreg.breg & lhs metadata 1 scale 1 and 001o
jno errarguments
emit 1, lhs metadata 1 scale 0 shl 3 and 070o or byteencoding
exit
indirect:
check lhs relativeto lhs element 1 & lhs isreg.wreg & \
lhs metadata 1 scale 0 = 040o
jno errarguments
emitsuffix
indexprefix lhs
emit 1, indirectencoding
indexoffset lhs
exit
errarguments:
err 'invalid arguments'
end calminstruction
end repeat
end iterate
@ez80.calminstruction ex.suffixname lhs*, rhs*
local lhsvalue, rhsvalue
isindirect lhs
jyes memory
isindirect rhs
jyes swap
compute lhsvalue, lhs
compute rhsvalue, rhs
check (lhsvalue eq de? & rhsvalue eq hl?) | \
(rhsvalue eq de? & lhsvalue eq hl?)
jno notdehl
emitsuffix
emit 1, 353o
exit
notdehl:
check (lhsvalue eq af? & rhsvalue eq af'?) | \
(rhsvalue eq af? & lhsvalue eq af'?)
jno errarguments
emitsuffix
emit 1, 010o
exit
swap:
compute rhsvalue, lhs
compute lhsvalue, rhs
jump swapped
memory:
isindirect rhs
jyes errindirection
compute lhsvalue, lhs
compute rhsvalue, rhs
swapped:
check lhsvalue eq sp? & rhsvalue eq rhsvalue element 1 & \
rhsvalue metadata 1 scale 0 = 040o
jno errarguments
emitsuffix
indexprefix rhsvalue
emit 1, 343o
exit
errindirection:
err 'invalid indirection'
exit
errarguments:
err 'invalid arguments'
end calminstruction
@ez80.calminstruction djnz.suffixname lhs*
local offset
isindirect lhs
jyes errindirection
compute offset, lhs - $ - suffixsize
emitsuffix
emit 1, 020o
emit 1, offset
check -200o <= offset & offset < 200o
jno errrange
exit
errindirection:
err 'invalid indirection'
exit
errrange:
err 'offset out of range'
end calminstruction
@ez80.calminstruction jr.suffixname lhs*, rhs
local offset
isindirect lhs
jyes errindirection
match , rhs
jyes unconditional
isindirect rhs
jyes errindirection
compute lhs, lhs
check lhs eq lhs element 1 & lhs isreg.breg & \
lhs metadata 1 scale 0 and 047o = 001o
jno errcondition
compute offset, rhs - $ - suffixsize
emitsuffix
emit 1, lhs metadata 1 scale 0 and 030o or 040o
emit 1, offset
check -200o <= offset & offset < 200o
jno errrange
exit
unconditional:
compute offset, lhs - $ - suffixsize
emitsuffix
emit 1, 030o
emit 1, offset
check -200o <= offset & offset < 200o
jno errrange
exit
errindirection:
err 'invalid indirection'
exit
errcondition:
err 'invalid condition'
exit
errrange:
err 'offset out of range'
end calminstruction
@ez80.calminstruction jq.suffixname lhs*, rhs
local after, offset, address
proxy rhs
compute after, @ez80.unique
compute @ez80.unique, after + 1
arrange after, =@ez80.=unique#after
match , rhs
jno conditional
arrange rhs, lhs
arrange lhs,
conditional:
isindirect rhs
jyes errindirection
check rhs relativeto after
jno far
compute offset, rhs - after
check offset & offset <> -suffixsize | definite rhs
jno after
check -200o <= offset & offset < 200o
jno far
match , lhs
jyes nearunconditional
compute lhs, lhs
check lhs eq lhs element 1 & lhs isreg.breg & \
lhs metadata 1 scale 0 and 047o = 001o
jno farconditional
emitsuffix
emit 1, lhs metadata 1 scale 0 and 030o or 040o
emit 1, offset
jump after
nearunconditional:
emitsuffix
emit 1, 030o
emit 1, offset
jump after
far:
match , lhs
jyes farunconditional
compute lhs, lhs
farconditional:
check lhs eq lhs element 1 & lhs isreg.breg & \
lhs metadata 1 scale 0 and 007o = 001o
jno errcondition
emitsuffix
emit 1, lhs metadata 1 scale 0 and 070o or 302o
execute =@ez80.=word wordsize, @rhs
jump after
farunconditional:
emitsuffix
emit 1, 303o
execute =@ez80.=word wordsize, @rhs
after:
compute address, $?
publish after:, address
exit
errindirection:
err 'invalid indirection'
exit
errcondition:
err 'invalid condition'
end calminstruction
@ez80.calminstruction ld.suffixname lhs*, rhs*
local opcode, prefix
proxy lhs, rhs
isindirect lhs
compute lhs, +lhs
jyes isstore
isindirect rhs
compute rhs, +rhs
jyes isload
check lhs eq lhs element 1
jno errarguments
check lhs isreg.breg
jno notbyte
check rhs eq rhs element 1 & rhs isreg.breg & \
lhs metadata 1 scale 1 and rhs metadata 1 scale 1 and 001o & \
(lhs metadata 1 scale 0 xor rhs metadata 1 scale 0 and 006o | \
lhs metadata 1 scale 1 = rhs metadata 1 scale 1) & \
(~lhs eq rhs | lhs metadata 1 scale 0 > 033o)
jno notgetsetbyte
emitsuffix
compute prefix, lhs metadata 1 scale 1
check prefix > 300o
jyes byteindex
compute prefix, rhs metadata 1 scale 1
check prefix > 300o
jno notbyteindex
byteindex:
emit 1, prefix
notbyteindex:
emit 1, lhs metadata 1 scale 0 shl 3 and 070o + \
rhs metadata 1 scale 0 and 007o or 100o
exit
notgetsetbyte:
check lhs eq a? & rhs eq rhs element 1 & rhs isreg.irmb
jno notgetirmb
emitsuffix
emit 1, 355o
emit 1, rhs metadata 1 scale 0
exit
notgetirmb:
check lhs metadata 1 scale 1 and 001o
jno errarguments
emitsuffix
indexprefix lhs
emit 1, lhs metadata 1 scale 0 shl 3 and 070o or 006o
emit 1, rhs
exit
notbyte:
check lhs isreg.wreg & lhs metadata 1 scale 1 and 004o
jno notword
check lhs eq sp? & rhs eq rhs element 1 & rhs isreg.wreg & \
rhs metadata 1 scale 0 = 040o
jno notsetsp
emitsuffix
indexprefix rhs
emit 1, 371o
exit
notsetsp:
check lhs eq hl? & rhs eq i?
jno setwordimmediate
emitsuffix
emit 1, 355o
emit 1, 327o
exit
setwordimmediate:
emitsuffix
indexprefix lhs
emit 1, lhs metadata 1 scale 0 or 001o
execute =@ez80.=word wordsize, @rhs
exit
notword:
check lhs isreg.irmb & rhs eq a?
jno notsetirmb
emitsuffix
emit 1, 355o
emit 1, lhs metadata 1 scale 1
exit
notsetirmb:
check lhs eq i? & rhs eq hl?
jno errarguments
emitsuffix
emit 1, 355o
emit 1, 307o
exit
isstore:
isindirect rhs
jyes errindirection
compute rhs, +rhs
check lhs relativeto lhs element 1 & lhs isreg.wreg
jno notstoretowordregister
check lhs metadata 1 scale 0 = 040o
jno notstoretowordaccumulator
check rhs eq rhs element 1 & rhs isreg.breg & \
rhs metadata 1 scale 1 = 003o
jno notstoretowordaccumulatorfrombyte
emitsuffix
indexprefix lhs
emit 1, rhs metadata 1 scale 0 and 007o or 160o
indexoffset lhs
exit
notstoretowordaccumulatorfrombyte:
check rhs eq rhs element 1 & rhs isreg.wreg & \
rhs metadata 1 scale 1 and 005o = 005o
jno storetowordaccumulatorfrombyte
compute opcode, rhs metadata 1 scale 0 or 017o
check rhs metadata 1 scale 1 > 300o
jno storetowordaccumulator
check lhs metadata 1 scale 1 xor rhs metadata 1 scale 1 and 040o
jno notstorematchingindex
compute opcode, opcode + 017o
jump storetowordaccumulator
notstorematchingindex:
compute opcode, opcode + 020o
storetowordaccumulator:
check lhs metadata 1 scale 1 > 300o
jno notstoretoindex
emitsuffix
indexprefix lhs
emit 1, opcode
indexoffset lhs
exit
notstoretoindex:
check lhs scale 0
jyes errarguments
emitsuffix
emit 1, 355o
emit 1, opcode
exit
storetowordaccumulatorfrombyte:
emitsuffix
indexprefix lhs
emit 1, 066o
indexoffset lhs
emit 1, rhs
exit
notstoretowordaccumulator:
check lhs metadata 1 scale 0 < 040o & rhs eq a?
jno errarguments
emitsuffix
emit 1, lhs metadata 1 scale 0 or 002o
exit
notstoretowordregister:
check rhs eq a?
jno notstorefroma
emitsuffix
emit 1, 062o
execute =@ez80.=word wordsize, @lhs
exit
notstorefroma:
check rhs eq rhs element 1 & rhs isreg.wreg & \
rhs metadata 1 scale 1 and 004o
jno errarguments
check rhs metadata 1 scale 0 = 040o
jno notstorefromindex
emitsuffix
indexprefix rhs
emit 1, 042o
execute =@ez80.=word wordsize, @lhs
exit
notstorefromindex:
emitsuffix
emit 1, 355o
emit 1, rhs metadata 1 scale 0 or 103o
execute =@ez80.=word wordsize, @lhs
exit
isload:
check lhs eq lhs element 1
jno errarguments
check rhs relativeto rhs element 1 & rhs isreg.wreg
jno notloadwordregister
check rhs metadata 1 scale 0 = 040o
jno loadotherwordregister
check lhs isreg.breg & lhs metadata 1 scale 1 = 003o
jno notloadbyte
emitsuffix
indexprefix rhs
emit 1, lhs metadata 1 scale 0 shl 3 and 070o or 106o
indexoffset rhs
exit
notloadbyte:
check lhs isreg.wreg & lhs metadata 1 scale 1 and 005o = 005o
jno errarguments
compute opcode, lhs metadata 1 scale 0 or 007o
check lhs metadata 1 scale 1 > 300o
jno notloadindex
check lhs metadata 1 scale 1 xor rhs metadata 1 scale 1 and 040o
jno loadsameindex
compute opcode, opcode + 012o
jump notloadindex
loadsameindex:
compute opcode, opcode + 020o
notloadindex:
compute prefix, rhs metadata 1 scale 1
emitsuffix
check prefix > 300o
jno notloadfromindex
emit 1, prefix
emit 1, opcode
; assume yes
indexoffset rhs
exit
notloadfromindex:
check rhs scale 0
jyes errarguments
emit 1, 355o
emit 1, opcode
exit
loadotherwordregister:
check lhs eq a? & rhs metadata 1 scale 0 < 040o
jno errarguments
emitsuffix
emit 1, rhs metadata 1 scale 0 or 012o
exit
notloadwordregister:
check lhs eq a?
jno notloadaimmediate
emitsuffix
emit 1, 072o
execute =@ez80.=word wordsize, @rhs
exit
notloadaimmediate:
check lhs isreg.wreg & lhs metadata 1 scale 1 and 004o
jno errarguments
check lhs metadata 1 scale 0 = 040o
jno loadotherwordimmediate
emitsuffix
indexprefix lhs
emit 1, 052o
execute =@ez80.=word wordsize, @rhs
exit
loadotherwordimmediate:
emitsuffix
emit 1, 355o
emit 1, lhs metadata 1 scale 0 or 113o
execute =@ez80.=word wordsize, @rhs
exit
errindirection:
err 'invalid indirection'
exit
errarguments:
err 'invalid arguments'
end calminstruction
iterate <name,first,second>, ldp,lhs,rhs, ldrp,rhs,lhs
calminstruction calminstruction?.loadpair? lhs*, rhs*
execute =execute ===ld?.=suffixname first
execute =execute ===ld?.=suffixname second
end calminstruction
@ez80.calminstruction name.suffixname lhs*, mhs*, rhs*
proxy lhs, mhs, rhs, hs, ls, hi, lo
isindirect mhs
jyes errindirection
compute mhs, +mhs
isindirect lhs
compute lhs, +lhs
jyes isstore
isindirect rhs
compute rhs, +rhs
jyes isload
regsize hs, lhs
regsize ls, mhs
execute =virtual?
execute =emit? @hs + @ls, @rhs
execute =load? @hi: @hs =from? =$$? + @ls
execute =load? @lo: @ls =from? =$$?
execute =end? =virtual?
loadpair <@mhs, @lo>, <@lhs, @hi>
exit
isstore:
isindirect rhs
jyes errindirection
compute rhs, +rhs
regsize ls, rhs
loadpair <(@lhs), @rhs>, <(@lhs + @ls), @mhs>
exit
isload:
regsize ls, mhs
loadpair <@mhs, (@rhs)>, <@lhs, (@rhs + @ls)>
exit
errindirection:
err 'invalid indirection'
exit
end calminstruction
purge calminstruction?.loadpair?
end iterate
@ez80.calminstruction add.suffixname lhs*, rhs
match , rhs
jyes implicit
isindirect lhs
jyes errindirection
compute lhs, lhs
check lhs eq a?
jyes byte
isindirect rhs
jyes errindirection
compute rhs, rhs
check lhs eq lhs element 1 & lhs isreg.wreg & \
rhs eq rhs element 1 & lhs isreg.wreg & \
lhs metadata 1 scale 0 = 040o & rhs metadata 1 scale 1 and 004o & \
(lhs metadata 1 scale 0 <> rhs metadata 1 scale 0 | \
lhs metadata 1 scale 1 = rhs metadata 1 scale 1)
jno errarguments
emitsuffix
indexprefix lhs
emit 1, rhs metadata 1 scale 0 or 011o
exit
implicit:
arrange rhs, lhs
byte:
isindirect rhs
compute rhs, +rhs
jyes indirect
check rhs eq rhs element 1 & rhs isreg.breg & \
rhs metadata 1 scale 1 and 001o
jno immediate
emitsuffix
indexprefix rhs
emit 1, rhs metadata 1 scale 0 and 007o or 200o
exit
indirect:
check rhs relativeto rhs element 1 & rhs isreg.wreg & \
rhs metadata 1 scale 0 = 040o
jno errarguments
emitsuffix
indexprefix rhs
emit 1, 206o
indexoffset rhs
exit
immediate:
emitsuffix
emit 1, 306o
emit 1, rhs
exit
errindirection:
err 'invalid indirection'
exit
errarguments:
err 'invalid arguments'
end calminstruction
iterate name, adc, sbc
repeat 1, byteencoding: 170o + % shl 4, \
indirectencoding: 176o + % shl 4, \
wordencoding: 122o - % shl 3, \
immediateencoding: 276o + % shl 4
@ez80.calminstruction name.suffixname lhs*, rhs
match , rhs
jyes implicit
isindirect lhs
jyes errindirection
compute lhs, lhs
check lhs eq a?
jyes byte
isindirect rhs
jyes errindirection
compute rhs, rhs
check lhs eq hl? & rhs eq rhs element 1 & rhs isreg.wreg & \
rhs metadata 1 scale 1 and 002o
jno errarguments
emitsuffix
emit 1, 355o
emit 1, rhs metadata 1 scale 0 or wordencoding
exit
implicit:
arrange rhs, lhs
byte:
isindirect rhs
compute rhs, +rhs
jyes indirect
check rhs eq rhs element 1 & rhs isreg.breg & \
rhs metadata 1 scale 1 and 001o
jno immediate
emitsuffix
indexprefix rhs
emit 1, rhs metadata 1 scale 0 and 007o or byteencoding
exit
indirect:
check rhs relativeto rhs element 1 & rhs isreg.wreg & \
rhs metadata 1 scale 0 = 040o
jno errarguments
emitsuffix
indexprefix rhs
emit 1, indirectencoding
indexoffset rhs
exit
immediate:
emitsuffix
emit 1, immediateencoding
emit 1, rhs
exit
errindirection:
err 'invalid indirection'
exit
errarguments:
err 'invalid arguments'
end calminstruction
end repeat
end iterate
iterate <name*,encoding*>, sub,220o, and,240o, xor,250o, or,260o, cp,270o
repeat 1, indirectencoding: encoding or 006o, \
immediateencoding: encoding or 106o
@ez80.calminstruction name.suffixname lhs*, rhs
match , rhs
jyes implicit
isindirect lhs
jyes errindirection
check lhs eq a?
jno errarguments
arrange lhs, rhs
implicit:
isindirect lhs
compute lhs, +lhs
jyes indirect
check lhs relativeto lhs element 1 & lhs isreg.breg & \
lhs metadata 1 scale 1 and 001o
jno immediate
emitsuffix
indexprefix lhs
emit 1, lhs metadata 1 scale 0 and 007o or encoding
exit
indirect:
check lhs relativeto lhs element 1 & lhs isreg.wreg & \
lhs metadata 1 scale 0 = 040o
jno errarguments
emitsuffix
indexprefix lhs
emit 1, indirectencoding
indexoffset lhs
exit
immediate:
emitsuffix
emit 1, immediateencoding
emit 1, lhs
exit
errindirection:
err 'invalid indirection'
exit
errarguments:
err 'invalid arguments'
end calminstruction
end repeat
end iterate
@ez80.calminstruction tst.suffixname lhs*, rhs
match , rhs
jyes implicit
isindirect lhs
jyes errindirection
check lhs eq a?
jno errarguments
arrange lhs, rhs
implicit:
isindirect lhs
jyes indirect
compute lhs, +lhs
check lhs eq lhs element 1 & lhs isreg.breg & \
lhs metadata 1 scale 1 = 003o
jno immediate
emitsuffix
indexprefix lhs
emit 1, 355o
emit 1, lhs metadata 1 scale 0 shl 3 and 070o or 004o
exit
indirect:
check lhs eq hl?
jno errarguments
emitsuffix
emit 1, 355o
emit 1, 064o
exit
immediate:
emitsuffix
emit 1, 355o
emit 1, 144o
emit 1, lhs
exit
errindirection:
err 'invalid indirection'
exit
errarguments:
err 'invalid arguments'
end calminstruction
@ez80.calminstruction ret.suffixname lhs
match , lhs
jyes unconditional
isindirect lhs
jyes errindirection
compute lhs, lhs
check lhs eq lhs element 1 & lhs isreg.breg & \
lhs metadata 1 scale 0 and 007o = 001o
jno errarguments
emitsuffix
emit 1, lhs metadata 1 scale 0 and 070o or 300o
exit
unconditional:
emitsuffix
emit 1, 311o
exit