mirror of
https://github.com/notwa/mm
synced 2024-11-05 06:29:02 -08:00
1089 lines
29 KiB
Lua
1089 lines
29 KiB
Lua
-- i've lost control of my life
|
|
|
|
-- lexer and parser somewhat based on http://chunkbake.luaforge.net/
|
|
|
|
-- https://github.com/mikeryan/n64dev/tree/master/docs/n64ops
|
|
-- cajeasm style assembly
|
|
|
|
-- TODO: maybe support reg# style too
|
|
local registers = {
|
|
[0]=
|
|
'R0', 'AT', 'V0', 'V1', 'A0', 'A1', 'A2', 'A3',
|
|
'T0', 'T1', 'T2', 'T3', 'T4', 'T5', 'T6', 'T7',
|
|
'S0', 'S1', 'S2', 'S3', 'S4', 'S5', 'S6', 'S7',
|
|
'T8', 'T9', 'K0', 'K1', 'GP', 'SP', 'S8', 'RA',
|
|
}
|
|
|
|
local fpu_registers = {
|
|
[0]=
|
|
'F0', 'F1', 'F2', 'F3', 'F4', 'F5', 'F6', 'F7',
|
|
'F8', 'F9', 'F10', 'F11', 'F12', 'F13', 'F14', 'F15',
|
|
'F16', 'F17', 'F18', 'F19', 'F20', 'F21', 'F22', 'F23',
|
|
'F24', 'F25', 'F26', 'F27', 'F28', 'F29', 'F30', 'F31',
|
|
}
|
|
|
|
local all_instructions = {
|
|
'ADD', 'ADDI', 'ADDIU', 'ADDU',
|
|
'AND', 'ANDI',
|
|
'BC1F', 'BC1FL',
|
|
'BC1T', 'BC1TL',
|
|
'BEQ', 'BEQL',
|
|
'BGEZ', 'BGEZAL', 'BGEZALL', 'BGEZL',
|
|
'BGTZ', 'BGTZL',
|
|
'BLEZ', 'BLEZL',
|
|
'BLTZ', 'BLTZAL', 'BLTZALL', 'BLTZL',
|
|
'BNE', 'BNEL',
|
|
'BREAK',
|
|
'CACHE',
|
|
'CFC1',
|
|
'CTC1',
|
|
'DADD', 'DADDI', 'DADDIU', 'DADDU',
|
|
'DDIV', 'DDIVU',
|
|
'DIV', 'DIVU',
|
|
'DMFC1', 'DMTC1',
|
|
'DMULT', 'DMULTU',
|
|
'DSLL', 'DSLL32', 'DSLLV',
|
|
'DSRA', 'DSRA32', 'DSRAV',
|
|
'DSRL', 'DSRL32', 'DSRLV',
|
|
'DSUB', 'DSUBU',
|
|
'ERET',
|
|
'J',
|
|
'JAL', 'JALR',
|
|
'JR',
|
|
'LB', 'LBU',
|
|
'LD',
|
|
'LDC1', 'LDC2',
|
|
'LDL', 'LDR',
|
|
'LH',
|
|
'LHU',
|
|
'LL',
|
|
'LLD',
|
|
'LUI',
|
|
'LW',
|
|
'LWC1',
|
|
'LWL', 'LWR',
|
|
'LWU',
|
|
'MFC0',
|
|
'MFC1',
|
|
'MFHI',
|
|
'MFLO',
|
|
'MTC0', 'MTC1',
|
|
'MTHI', 'MTLO',
|
|
'MULT', 'MULTU',
|
|
'NOR',
|
|
'OR', 'ORI',
|
|
'SB',
|
|
'SC',
|
|
'SCD',
|
|
'SD',
|
|
'SDC1', 'SDC2',
|
|
'SDL', 'SDR',
|
|
'SH',
|
|
'SLL', 'SLLV',
|
|
'SLT', 'SLTI', 'SLTIU', 'SLTU',
|
|
'SRA', 'SRAV',
|
|
'SRL', 'SRLV',
|
|
'SUB', 'SUBU',
|
|
'SW',
|
|
'SWC1',
|
|
'SWL', 'SWR',
|
|
'SYNC',
|
|
'SYSCALL',
|
|
'TEQ', 'TEQI',
|
|
'TGE', 'TGEI', 'TGEIU', 'TGEU',
|
|
'TLBP', 'TLBR', 'TLBWI', 'TLBWR',
|
|
'TLT', 'TLTI', 'TLTIU', 'TLTU',
|
|
'TNE', 'TNEI',
|
|
'XOR', 'XORI',
|
|
|
|
'ABS.D', 'ABS.S',
|
|
'ADD.D', 'ADD.S',
|
|
'CEIL.L.D', 'CEIL.L.S',
|
|
'CEIL.W.D', 'CEIL.W.S',
|
|
'CVT.D.L', 'CVT.D.S', 'CVT.D.W',
|
|
'CVT.L.D', 'CVT.L.S',
|
|
'CVT.S.D', 'CVT.S.L', 'CVT.S.W',
|
|
'CVT.W.D', 'CVT.W.S',
|
|
'DIV.D', 'DIV.S',
|
|
'FLOOR.L.D', 'FLOOR.L.S',
|
|
'FLOOR.W.D', 'FLOOR.W.S',
|
|
'MOV.F', 'MOV.S',
|
|
'MUL.F', 'MUL.S',
|
|
'NEG.F', 'NEG.S',
|
|
'ROUND.L.D', 'ROUND.L.S',
|
|
'ROUND.W.D', 'ROUND.W.S',
|
|
'SQRT.D', 'SQRT.S',
|
|
'SUB.D', 'SUB.S',
|
|
'TRUNC.L.S', 'TRUNC.W.D',
|
|
|
|
'C.EQ.D', 'C.EQ.S',
|
|
'C.F.D', 'C.F.S',
|
|
'C.LE.D', 'C.LE.S',
|
|
'C.LT.D', 'C.LT.S',
|
|
'C.NGE.D', 'C.NGE.S',
|
|
'C.NGL.D', 'C.NGL.S',
|
|
'C.NGLE.D', 'C.NGLE.S',
|
|
'C.NGT.D', 'C.NGT.S',
|
|
'C.OLE.D', 'C.OLE.S',
|
|
'C.OLT.D', 'C.OLT.S',
|
|
'C.SEQ.D', 'C.SEQ.S',
|
|
'C.SF.D', 'C.SF.S',
|
|
'C.UEQ.D', 'C.UEQ.S',
|
|
'C.ULE.D', 'C.ULE.S',
|
|
'C.ULT.D', 'C.ULT.S',
|
|
'C.UN.D', 'C.UN.S',
|
|
|
|
-- pseudo-instructions
|
|
'B',
|
|
'BAL',
|
|
'BEQI',
|
|
'BNEI',
|
|
'BGE', 'BGEI',
|
|
'BLE', 'BLEI',
|
|
'BLT', 'BLTI',
|
|
'BGT', 'BGTI',
|
|
'CL',
|
|
'LI',
|
|
'MOV',
|
|
'NOP',
|
|
'SUBI', 'SUBIU',
|
|
}
|
|
|
|
local all_directives = {
|
|
'ALIGN', 'SKIP',
|
|
'ASCII', 'ASCIIZ',
|
|
'BYTE', 'HALFWORD', 'WORD', 'FLOAT',
|
|
--'HEX', -- excluded here due to different syntax
|
|
'INC', 'INCASM', 'INCLUDE',
|
|
'INCBIN',
|
|
'ORG',
|
|
}
|
|
|
|
local all_tokens = {
|
|
'DEF',
|
|
'DEFSYM',
|
|
'DEREF',
|
|
'DIR',
|
|
'EOF',
|
|
'EOL',
|
|
'INSTR',
|
|
'LABEL',
|
|
'LABELSYM',
|
|
'NUM',
|
|
'REG',
|
|
'SEP',
|
|
}
|
|
|
|
local all_registers = {}
|
|
for k, v in pairs(registers) do
|
|
all_registers[k] = v
|
|
end
|
|
for k, v in pairs(fpu_registers) do
|
|
all_registers[k + 32] = v
|
|
end
|
|
|
|
-- set up reverse table lookups
|
|
local function revtable(t)
|
|
for k, v in pairs(t) do
|
|
t[v] = k
|
|
end
|
|
end
|
|
|
|
revtable(registers)
|
|
revtable(fpu_registers)
|
|
revtable(all_registers)
|
|
revtable(all_instructions)
|
|
revtable(all_tokens)
|
|
|
|
local argtypes = {
|
|
bto = 'base rt offset',
|
|
sti = 'rs rt immediate',
|
|
std = 'rs rt rd', -- ending with 5 unset bits and a const
|
|
st = 'rs rt', -- ending with 10 unset bits and a const
|
|
tds = 'rs rd rs/sa', -- starting with 5 unset bits, ending with a const
|
|
s = 'rs', -- followed by 15 unset bits and a const
|
|
sto = 'rs rt offset',
|
|
stc = 'rs rt code', -- followed by a const
|
|
so = 'rs offset', -- with a const inbetween
|
|
sync= 'stype', -- starting with 15 unset bits, ending with a const
|
|
indx= 'index',
|
|
|
|
lui = 'rt immediate', -- starting with 5 unset bits
|
|
mf = 'rd', -- 10 unset bits on left, 5 on right, ending with a const
|
|
jalr= 'rs rd', -- 5 unset bits inbetween, 5 on right, ending with a const
|
|
code= 'code', -- ending with a const
|
|
|
|
movf= 'rd fs', -- starting with const, ending with 11 unset bits
|
|
bfo = 'base fs offset',
|
|
}
|
|
|
|
|
|
local at = argtypes -- temporary shorthand
|
|
local instruction_handlers = {
|
|
CFC1 = {17, at.movf, 2},
|
|
CTC1 = {17, at.movf, 6},
|
|
DMFC1 = {17, at.movf, 1},
|
|
DMTC1 = {17, at.movf, 5},
|
|
MFC0 = {16, at.movf, 0},
|
|
MFC1 = {16, at.movf, 0},
|
|
MTC0 = {17, at.movf, 4},
|
|
MTC1 = {17, at.movf, 4},
|
|
|
|
LDC1 = {53, at.bfo},
|
|
LWC1 = {49, at.bfo},
|
|
SDC1 = {61, at.bfo},
|
|
SWC1 = {57, at.bfo},
|
|
|
|
--
|
|
|
|
MTHI = { 0, at.s, 17},
|
|
MTLO = { 0, at.s, 19},
|
|
JR = { 0, at.s, 8},
|
|
|
|
BREAK = { 0, at.code,13},
|
|
SYSCALL = { 0, at.code,12},
|
|
|
|
SYNC = { 0, at.sync,15},
|
|
|
|
BEQ = { 4, at.sto},
|
|
BEQL = {20, at.sto},
|
|
BNE = { 5, at.sto},
|
|
BNEL = {21, at.sto},
|
|
|
|
TEQ = { 0, at.stc, 52},
|
|
TGE = { 0, at.stc, 48},
|
|
TGEU = { 0, at.stc, 49},
|
|
TLT = { 0, at.stc, 50},
|
|
TLTU = { 0, at.stc, 51},
|
|
TNE = { 0, at.stc, 54},
|
|
|
|
J = { 2, at.indx},
|
|
JAL = { 3, at.indx},
|
|
|
|
JALR = { 0, at.jalr, 9},
|
|
|
|
LUI = {15, at.lui},
|
|
|
|
MFHI = { 0, at.mf, 16},
|
|
MFLO = { 0, at.mf, 18},
|
|
|
|
BGEZ = { 1, at.so, 1},
|
|
BGEZAL = { 1, at.so, 17},
|
|
BGEZALL = { 1, at.so, 19},
|
|
BGEZL = { 1, at.so, 3},
|
|
BGTZ = { 7, at.so, 0},
|
|
BGTZL = {23, at.so, 0},
|
|
BLEZ = { 6, at.so, 0},
|
|
BLEZL = {22, at.so, 0},
|
|
BLTZ = { 1, at.so, 0},
|
|
BLTZAL = { 1, at.so, 16},
|
|
BLTZALL = { 1, at.so, 18},
|
|
BLTZL = { 1, at.so, 2},
|
|
|
|
--
|
|
|
|
NOP = { 0, at.code, 0},
|
|
|
|
LB = {32, at.bto},
|
|
LBU = {36, at.bto},
|
|
LD = {55, at.bto},
|
|
LDL = {26, at.bto},
|
|
LDR = {27, at.bto},
|
|
LH = {33, at.bto},
|
|
LHU = {37, at.bto},
|
|
LL = {48, at.bto},
|
|
LLD = {52, at.bto},
|
|
LW = {35, at.bto},
|
|
LWL = {34, at.bto},
|
|
LWR = {38, at.bto},
|
|
LWU = {39, at.bto},
|
|
SB = {40, at.bto},
|
|
SC = {56, at.bto},
|
|
SCD = {60, at.bto},
|
|
SD = {63, at.bto},
|
|
SDL = {44, at.bto},
|
|
SDR = {45, at.bto},
|
|
SH = {41, at.bto},
|
|
SW = {43, at.bto},
|
|
SWL = {42, at.bto},
|
|
SWR = {46, at.bto},
|
|
|
|
ADDI = { 8, at.sti},
|
|
ADDIU = { 9, at.sti},
|
|
ANDI = {12, at.sti},
|
|
DADDI = {24, at.sti},
|
|
DADDIU = {25, at.sti},
|
|
ORI = {13, at.sti},
|
|
SLTI = {10, at.sti},
|
|
SLTIU = {11, at.sti},
|
|
XORI = {14, at.sti},
|
|
|
|
ADD = { 0, at.std, 32},
|
|
ADDU = { 0, at.std, 33},
|
|
AND = { 0, at.std, 36},
|
|
DADD = { 0, at.std, 44},
|
|
DADDU = { 0, at.std, 45},
|
|
DSLLV = { 0, at.std, 20},
|
|
DSUB = { 0, at.std, 46},
|
|
DSUBU = { 0, at.std, 47},
|
|
NOR = { 0, at.std, 39},
|
|
OR = { 0, at.std, 37},
|
|
SLLV = { 0, at.std, 4},
|
|
SLT = { 0, at.std, 42},
|
|
SLTU = { 0, at.std, 43},
|
|
SRAV = { 0, at.std, 7},
|
|
SRLV = { 0, at.std, 6},
|
|
SUB = { 0, at.std, 34},
|
|
SUBU = { 0, at.std, 35},
|
|
XOR = { 0, at.std, 38},
|
|
|
|
DDIV = { 0, at.st, 30},
|
|
DDIVU = { 0, at.st, 31},
|
|
DIV = { 0, at.st, 26},
|
|
DIVU = { 0, at.st, 27},
|
|
DMULT = { 0, at.st, 28},
|
|
DMULTU = { 0, at.st, 29},
|
|
MULT = { 0, at.st, 24},
|
|
MULTU = { 0, at.st, 25},
|
|
|
|
DSLL = { 0, at.tds, 56},
|
|
DSLL32 = { 0, at.tds, 60},
|
|
DSRA = { 0, at.tds, 59},
|
|
DSRA32 = { 0, at.tds, 63},
|
|
DSRAV = { 0, at.tds, 23},
|
|
DSRL = { 0, at.tds, 58},
|
|
DSRL32 = { 0, at.tds, 62},
|
|
DSRLV = { 0, at.tds, 22},
|
|
SLL = { 0, at.tds, 0},
|
|
SRA = { 0, at.tds, 3},
|
|
SRL = { 0, at.tds, 2},
|
|
}
|
|
at = nil
|
|
|
|
local asm = ''
|
|
|
|
local f = io.open('Moonjump 2.asm', 'r')
|
|
if not f then
|
|
f = io.open('inject/Moonjump 2.asm', 'r')
|
|
if not f then
|
|
print('could not load assembly')
|
|
return
|
|
end
|
|
end
|
|
asm = f:read('*a')
|
|
f:close()
|
|
|
|
Lexer = {}
|
|
function Lexer:setup(asm)
|
|
self.asm = asm
|
|
self.pos = 1
|
|
self.line = 1
|
|
self.EOF = -1
|
|
self:nextc()
|
|
end
|
|
|
|
function Lexer:error(msg)
|
|
error(string.format('%s:%d: Error: %s', 'file.asm', self.line, msg), 2)
|
|
end
|
|
|
|
function Lexer:nextc()
|
|
if self.pos > #self.asm then
|
|
self.ord = self.EOF
|
|
self.chr = ''
|
|
self.chrchr = ''
|
|
return
|
|
end
|
|
|
|
if self.chr == '\n' then
|
|
self.line = self.line + 1
|
|
end
|
|
|
|
self.ord = string.byte(self.asm, self.pos)
|
|
self.pos = self.pos + 1
|
|
|
|
-- handle newlines; translate CRLF to LF
|
|
if self.ord == 13 then
|
|
if self.pos <= #self.asm and string.byte(self.asm, self.pos) == 10 then
|
|
self.pos = self.pos + 1
|
|
end
|
|
self.ord = 10
|
|
end
|
|
|
|
self.chr = string.char(self.ord)
|
|
if self.pos <= #self.asm then
|
|
self.ord2 = string.byte(self.asm, self.pos)
|
|
self.chr2 = string.char(self.ord2)
|
|
self.chrchr = string.char(self.ord, self.ord2)
|
|
else
|
|
self.chrchr = self.chr
|
|
end
|
|
end
|
|
|
|
function Lexer:skip_to_EOL()
|
|
while self.chr ~= '\n' and self.ord ~= self.EOF do
|
|
self:nextc()
|
|
end
|
|
end
|
|
|
|
function Lexer:save_next()
|
|
self.buff = self.buff..self.chr
|
|
self:nextc()
|
|
end
|
|
|
|
function Lexer:read_chars(pattern)
|
|
while string.find(self.chr, pattern) do
|
|
self:save_next()
|
|
end
|
|
end
|
|
|
|
function Lexer:read_number()
|
|
self.buff = ''
|
|
self:nextc()
|
|
self:read_chars('%d')
|
|
local num = tonumber(self.buff)
|
|
if not num then self:error('invalid number') end
|
|
return num
|
|
end
|
|
|
|
function Lexer:read_hex()
|
|
self.buff = ''
|
|
if self.chr ~= '$' then self:nextc() end
|
|
self:nextc()
|
|
self:read_chars('%x')
|
|
local num = tonumber(self.buff, 16)
|
|
if not num then self:error('invalid hex number') end
|
|
return num
|
|
end
|
|
|
|
function Lexer:read_binary()
|
|
self.buff = ''
|
|
self:nextc()
|
|
self:read_chars('[01]')
|
|
local num = tonumber(self.buff, 2)
|
|
if not num then self:error('invalid binary number') end
|
|
return num
|
|
end
|
|
|
|
function Lexer:skip_block_comment()
|
|
self:nextc()
|
|
self:nextc()
|
|
while true do
|
|
if self.ord == self.EOF then
|
|
self:error('incomplete block comment')
|
|
elseif self.chrchr == '*/' then
|
|
self:nextc()
|
|
self:nextc()
|
|
break
|
|
else
|
|
self:nextc()
|
|
end
|
|
end
|
|
end
|
|
|
|
function Lexer:lex()
|
|
while true do
|
|
if self.chr == '\n' then
|
|
self:nextc()
|
|
return 'EOL', '\n'
|
|
elseif self.ord == self.EOF then
|
|
return 'EOF', self.EOF
|
|
elseif self.chr == ';' then
|
|
self:skip_to_EOL()
|
|
elseif self.chrchr == '//' then
|
|
self:skip_to_EOL()
|
|
elseif self.chrchr == '/*' then
|
|
self:skip_block_comment()
|
|
elseif self.chr:find('%s') then
|
|
self:nextc()
|
|
elseif self.chr == '$' then
|
|
return 'NUM', self:read_hex()
|
|
elseif self.chr == '%' then
|
|
return 'NUM', self:read_binary()
|
|
elseif self.chr:find('%d') then
|
|
-- TODO: check if cajaasm accepts 0X0
|
|
if self.chr2 == 'x' or self.chr2 == 'X' then
|
|
return 'NUM', self:read_hex()
|
|
end
|
|
return 'NUM', self:read_number()
|
|
elseif self.chr == ',' then
|
|
self:nextc()
|
|
return 'SEP', ','
|
|
elseif self.chr == '[' then
|
|
self.buff = ''
|
|
self:nextc()
|
|
self:read_chars('[%w_]')
|
|
if self.chr ~= ']' then
|
|
self:error('invalid define name')
|
|
end
|
|
self:nextc()
|
|
if self.chr ~= ':' then
|
|
self:error('define requires a colon')
|
|
end
|
|
self:nextc()
|
|
return 'DEF', self.buff
|
|
elseif self.chr == '(' then
|
|
self.buff = ''
|
|
self:nextc()
|
|
self:read_chars('[%w_]')
|
|
if self.chr ~= ')' then
|
|
self:error('invalid register name')
|
|
end
|
|
self:nextc()
|
|
local up = self.buff:upper()
|
|
if not all_registers[up] then
|
|
self:error('not a register')
|
|
end
|
|
return 'DEREF', up
|
|
elseif self.chr == '.' then
|
|
self.buff = ''
|
|
self:read_chars('[%w]')
|
|
local up = self.buff:upper()
|
|
if not all_directives[up] then
|
|
self:error('not a directive')
|
|
end
|
|
if up == 'INC' or up == 'INCASM' or up == 'INCLUDE' then
|
|
return 'DIR', 'UP'
|
|
end
|
|
return 'DIR', up
|
|
elseif self.chr == '@' then
|
|
self.buff = ''
|
|
self:nextc()
|
|
self:read_chars('[%w_]')
|
|
return 'DEFSYM', self.buff
|
|
elseif self.chr:find('[%a_]') then
|
|
self.buff = ''
|
|
-- now that we know we're looking at an identifier,
|
|
-- we can start matching numbers and dots too.
|
|
self:read_chars('[%w_.]')
|
|
if self.chr == ':' then
|
|
if self.buff:find('\\.') then
|
|
self:error('labels cannot contain dots')
|
|
end
|
|
self:nextc()
|
|
return 'LABEL', self.buff
|
|
end
|
|
local up = self.buff:upper()
|
|
if up == 'HEX' then
|
|
return 'DIR', up
|
|
elseif all_registers[up] then
|
|
return 'REG', up
|
|
elseif all_instructions[up] then
|
|
return 'INSTR', up
|
|
else
|
|
if self.buff:find('\\.') then
|
|
self:error('labels cannot contain dots')
|
|
end
|
|
return 'LABELSYM', self.buff
|
|
end
|
|
elseif self.chr == ']' then
|
|
self:error('unmatched closing bracket')
|
|
elseif self.chr == ')' then
|
|
self:error('unmatched closing parenthesis')
|
|
else
|
|
self:error('unknown character or control character')
|
|
end
|
|
end
|
|
end
|
|
|
|
Parser = {}
|
|
function Parser:error(msg)
|
|
error(string.format('%s:%d: Error: %s', 'file.asm', self.line, msg), 2)
|
|
end
|
|
|
|
function Parser:advance()
|
|
self.tt, self.tok = Lexer:lex()
|
|
self.line = Lexer.line
|
|
return self.tt, self.tok
|
|
end
|
|
|
|
function Parser:is_EOL()
|
|
return self.tt == 'EOL' or self.tt == 'EOF'
|
|
end
|
|
|
|
function Parser:expect_EOL()
|
|
if self:is_EOL() then
|
|
self:advance()
|
|
return
|
|
end
|
|
self:error('expected end of line')
|
|
end
|
|
|
|
function Parser:optional_comma()
|
|
if self.tt == 'SEP' and self.tok == ',' then
|
|
self:advance()
|
|
return true
|
|
end
|
|
end
|
|
|
|
function Parser:number()
|
|
if self.tt ~= 'NUM' then
|
|
self:error('expected number')
|
|
end
|
|
local value = self.tok
|
|
self:advance()
|
|
return value
|
|
end
|
|
|
|
function Parser:directive()
|
|
local name = self.tok
|
|
self:advance()
|
|
if name == 'ORG' then
|
|
Dumper:add_directive(name, self:number())
|
|
elseif name == 'ALIGN' or name == 'SKIP' then
|
|
local size = self:number()
|
|
if self:optional_comma() then
|
|
Dumper:add_directive(name, size, self:number())
|
|
else
|
|
Dumper:add_directive(name, size)
|
|
end
|
|
self:expect_EOL()
|
|
elseif name == 'BYTE' or name == 'HALFWORD' or name == 'WORD' then
|
|
Dumper:add_directive(name, self:number())
|
|
while not self:is_EOL() do
|
|
self:advance()
|
|
self:optional_comma()
|
|
Dumper:add_directive(name, self:number())
|
|
end
|
|
self:expect_EOL()
|
|
elseif name == 'HEX' then
|
|
self:error('unimplemented')
|
|
elseif name == 'INC' or name == 'INCBIN' then
|
|
self:error('unimplemented')
|
|
elseif name == 'FLOAT' or name == 'ASCII' or name == 'ASCIIZ' then
|
|
self:error('unimplemented')
|
|
else
|
|
self:error('unknown directive')
|
|
end
|
|
end
|
|
|
|
function Parser:register(t)
|
|
t = t or registers
|
|
if self.tt ~= 'REG' then
|
|
if self.tt == 'NUM' and self.tok == '0' then
|
|
-- i don't think cajeasm actually does this
|
|
self.tt = 'REG'
|
|
self.tok = 'R0'
|
|
else
|
|
self:error('expected register')
|
|
end
|
|
end
|
|
local reg = self.tok
|
|
if not t[reg] then
|
|
self:error('wrong type of register')
|
|
end
|
|
self:advance()
|
|
return reg
|
|
end
|
|
|
|
function Parser:deref()
|
|
if self.tt ~= 'DEREF' then
|
|
self:error('expected register to dereference')
|
|
end
|
|
local reg = self.tok
|
|
self:advance()
|
|
return reg
|
|
end
|
|
|
|
function Parser:const()
|
|
if self.tt ~= 'NUM' and self.tt ~= 'DEFSYM' and self.tt ~= 'LABELSYM' then
|
|
self:error('expected constant')
|
|
end
|
|
local t = {self.tt, self.tok}
|
|
self:advance()
|
|
return t
|
|
end
|
|
|
|
function Parser:instruction()
|
|
local name = self.tok
|
|
self:advance()
|
|
local h = instruction_handlers[name]
|
|
|
|
if h == nil then
|
|
self:error('undefined instruction')
|
|
elseif h[2] == argtypes.bto then
|
|
-- OP rt, offset(base)
|
|
local rt = self:register()
|
|
self:optional_comma()
|
|
local offset = {'LOWER', self:const()}
|
|
local base = self:deref()
|
|
Dumper:add_instruction_5_5_16(h[1], base, rt, offset)
|
|
elseif h[2] == argtypes.bfo then
|
|
-- OP ft, offset(base)
|
|
local ft = self:register(fpu_registers)
|
|
self:optional_comma()
|
|
local offset = {'LOWER', self:const()}
|
|
local base = self:deref()
|
|
Dumper:add_instruction_5_5_16(h[1], base, rt, offset)
|
|
elseif h[2] == argtypes.sti then
|
|
-- OP rt, rs, immediate
|
|
local rs = self:register()
|
|
self:optional_comma()
|
|
local rt = self:register()
|
|
self:optional_comma()
|
|
local immediate = {'LOWER', self:const()}
|
|
Dumper:add_instruction_5_5_16(h[1], rs, rt, immediate)
|
|
elseif h[2] == argtypes.std then
|
|
-- OP rd, rs, rt
|
|
local rd = self:register()
|
|
self:optional_comma()
|
|
local rs = self:register()
|
|
self:optional_comma()
|
|
local rt = self:register()
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
Dumper:add_instruction_5_5_5_11(h[1], rs, rt, rd, const)
|
|
elseif h[2] == argtypes.st then
|
|
-- OP rs, rt
|
|
local rs = self:register()
|
|
self:optional_comma()
|
|
local rt = self:register()
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
Dumper:add_instruction_5_5_16(h[1], rs, rt, const)
|
|
elseif h[2] == argtypes.tds then
|
|
local rd = self:register()
|
|
self:optional_comma()
|
|
local rt = self:register()
|
|
self:optional_comma()
|
|
local rs
|
|
if name == 'DSRAV' or name == 'DSRLV' then
|
|
-- OP rd, rt, rs
|
|
rs = self:register()
|
|
else
|
|
-- OP rd, rt, sa
|
|
rs = self:const()
|
|
end
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
Dumper:add_instruction_5_5_5_5_6(h[1], 0, rt, rd, rs, const)
|
|
elseif h[2] == argtypes.s then
|
|
-- OP rs
|
|
local rs = self:register()
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
Dumper:add_instruction_5_5_16(h[1], rs, 0, const)
|
|
elseif h[2] == argtypes.sto then
|
|
-- OP rs, rt, offset
|
|
local rs = self:register()
|
|
self:optional_comma()
|
|
local rt = self:register()
|
|
self:optional_comma()
|
|
local offset = self:const()
|
|
Dumper:add_instruction_5_5_16(h[1], rs, rt, offset)
|
|
elseif h[2] == argtypes.stc then
|
|
-- OP TEQ rs, rt
|
|
local rs = self:register()
|
|
self:optional_comma()
|
|
local rt = self:register()
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
-- FIXME: there's supposed to be 'code' before const
|
|
-- but i dunno what it's supposed to be
|
|
-- so i'm leaving it as zero here
|
|
Dumper:add_instruction_5_5_16(h[1], rs, rt, const)
|
|
elseif h[2] == argtypes.so then
|
|
-- OP rs, offset
|
|
local rs = self:register()
|
|
self:optional_comma()
|
|
local offset = self:const()
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
-- FIXME: branches are relative
|
|
Dumper:add_instruction_5_5_16(h[1], rs, const, offset)
|
|
elseif h[2] == argtypes.sync then
|
|
-- OP
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
Dumper:add_instruction_26(h[1], const)
|
|
elseif h[2] == argtypes.indx then
|
|
-- OP target
|
|
local target = {'INDEX', self:const()}
|
|
Dumper:add_instruction_26(h[1], target)
|
|
elseif h[2] == argtypes.lui then
|
|
-- OP rt, immediate
|
|
local rt = self:register()
|
|
self:optional_comma()
|
|
local immediate = {'UPPER', self:const()}
|
|
Dumper:add_instruction_5_5_16(h[1], 0, rt, immediate)
|
|
elseif h[2] == argtypes.mf then
|
|
-- OP rd
|
|
local rd = self:register()
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
Dumper:add_instruction_5_5_5_5_6(h[1], 0, 0, rd, 0, const)
|
|
elseif h[2] == argtypes.jalr then
|
|
-- OP rs, rd
|
|
local rs = self:register()
|
|
self:optional_comma()
|
|
local rd = self:register()
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
Dumper:add_instruction_5_5_5_5_6(h[1], rs, 0, rd, 0, const)
|
|
local rd = self:register()
|
|
elseif h[2] == argtypes.code then
|
|
-- OP
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
Dumper:add_instruction_26(h[1], const)
|
|
elseif h[2] == argtypes.movf then
|
|
local rt = self:register()
|
|
self:optional_comma()
|
|
local rd
|
|
if name == 'MFC0' or name == 'MTC0' then
|
|
-- OP rt, rd
|
|
rd = self:register()
|
|
else
|
|
-- OP rt, fs
|
|
rd = self:register(fpu_registers)
|
|
end
|
|
local const = h[3] or self:error('internal error: expected const')
|
|
Dumper:add_instruction_5_5_5_5_6(h[1], const, rt, rd, 0, 0)
|
|
else
|
|
self:error('TODO')
|
|
end
|
|
self:expect_EOL()
|
|
end
|
|
|
|
function Parser:parse(asm)
|
|
self.asm = asm
|
|
Lexer:setup(asm)
|
|
Dumper:setup()
|
|
|
|
self:advance()
|
|
while self.tt ~= 'EOF' do
|
|
if self.tt == 'EOL' then
|
|
-- empty line
|
|
self:advance()
|
|
elseif self.tt == 'DEF' then
|
|
local name = self.tok
|
|
self:advance()
|
|
Dumper:add_define(name, self:number())
|
|
elseif self.tt == 'DIR' then
|
|
self:directive()
|
|
elseif self.tt == 'LABEL' then
|
|
Dumper:add_label(self.tok)
|
|
self:advance()
|
|
elseif self.tt == 'INSTR' then
|
|
self:instruction()
|
|
else
|
|
self:error('unexpected token (unknown instruction?)')
|
|
end
|
|
end
|
|
|
|
return Dumper:dump()
|
|
end
|
|
|
|
Dumper = {}
|
|
function Dumper:setup()
|
|
self.defines = {}
|
|
self.labels = {}
|
|
self.lines = {}
|
|
end
|
|
|
|
function Dumper:error(msg)
|
|
error(string.format('Internal Error: %s', msg), 2)
|
|
end
|
|
|
|
function Dumper:add_instruction_26(i, a)
|
|
local t = {}
|
|
t.sizes = {26}
|
|
t.data = {i, a}
|
|
table.insert(self.lines, t)
|
|
--print(('added {%s, %s}'):format(
|
|
-- tostring(i),
|
|
-- tostring(a)
|
|
--))
|
|
end
|
|
|
|
function Dumper:add_instruction_5_5_16(i, a, b, c)
|
|
local t = {}
|
|
t.sizes = {5, 5, 16}
|
|
t.data = {i, a, b, c}
|
|
table.insert(self.lines, t)
|
|
--print(('added {%s, %s, %s, %s}'):format(
|
|
-- tostring(i),
|
|
-- tostring(a), tostring(b), tostring(c)
|
|
--))
|
|
end
|
|
|
|
function Dumper:add_instruction_5_5_5_11(i, a, b, c, d)
|
|
local t = {}
|
|
t.sizes = {5, 5, 5, 11}
|
|
t.data = {i, a, b, c, d}
|
|
table.insert(self.lines, t)
|
|
--print(('added {%s, %s, %s, %s, %s}'):format(
|
|
-- tostring(i),
|
|
-- tostring(a), tostring(b), tostring(c), tostring(d)
|
|
--))
|
|
end
|
|
|
|
function Dumper:add_instruction_5_5_5_5_6(i, a, b, c, d, e)
|
|
local t = {}
|
|
t.sizes = {5, 5, 5, 5, 6}
|
|
t.data = {i, a, b, c, d, e}
|
|
table.insert(self.lines, t)
|
|
--print(('added {%s, %s, %s, %s, %s, %s}'):format(
|
|
-- tostring(i),
|
|
-- tostring(a), tostring(b), tostring(c), tostring(d), tostring(e)
|
|
--))
|
|
end
|
|
|
|
function Dumper:add_define(name, number)
|
|
self.defines[name] = number
|
|
end
|
|
|
|
function Dumper:add_label(name)
|
|
self.labels[name] = #self.lines + 1
|
|
end
|
|
|
|
function Dumper:add_directive(...)
|
|
self:error('unimplemented directive')
|
|
end
|
|
|
|
function Dumper:print(uw, lw)
|
|
print(('%04X%04X'):format(uw, lw))
|
|
end
|
|
|
|
function Dumper:desym(tok)
|
|
if type(tok[2]) == 'number' then
|
|
return tok[2]
|
|
elseif all_registers[tok] then
|
|
return registers[tok]
|
|
elseif tok[1] == 'LABELSYM' then
|
|
print('(label)', tok[2])
|
|
return self.labels[tok[2]]*4
|
|
elseif tok[1] == 'DEFSYM' then
|
|
print('(define)')
|
|
local val = self.defines[tok[2]]
|
|
if val == nil then
|
|
self:error('unknown define')
|
|
end
|
|
return val
|
|
end
|
|
print(tok)
|
|
self:error('failed to desym')
|
|
end
|
|
|
|
function Dumper:toval(tok)
|
|
if tok == nil then
|
|
self:error('nil value')
|
|
elseif type(tok) == 'number' then
|
|
return tok
|
|
elseif all_registers[tok] then
|
|
return registers[tok]
|
|
end
|
|
if type(tok) == 'table' then
|
|
if #tok ~= 2 then
|
|
print('toval', tok)
|
|
self:error('invalid token')
|
|
end
|
|
if tok[1] == 'UPPER' then
|
|
local val = self:desym(tok[2])
|
|
while val >= 0x10000 do
|
|
val = val/2
|
|
end
|
|
return val
|
|
elseif tok[1] == 'LOWER' then
|
|
local val = self:desym(tok[2]) % 0x10000
|
|
return val
|
|
elseif tok[1] == 'INDEX' then
|
|
local val
|
|
if type(tok[2]) == 'table' and tok[2][1] == 'LABELSYM' then
|
|
-- don't multiply by 4 twice
|
|
val = self:desym(tok[2])
|
|
else
|
|
val = self:desym(tok[2])*4
|
|
end
|
|
print('(index)', val)
|
|
return val
|
|
else
|
|
return self:desym(tok)
|
|
end
|
|
end
|
|
print('toval', tok)
|
|
self:error('invalid value')
|
|
end
|
|
|
|
function Dumper:validate(n, bits)
|
|
local max = 2^bits
|
|
if n > max or n < 0 then
|
|
print(("n %08X"):format(math.abs(n)))
|
|
self:error('value out of range')
|
|
end
|
|
end
|
|
|
|
function Dumper:dump()
|
|
for i, t in ipairs(self.lines) do
|
|
local uw = 0
|
|
local lw = 0
|
|
local val = nil
|
|
|
|
local i = t.data[1]
|
|
uw = uw + i*0x400
|
|
|
|
if #t.sizes == 1 then
|
|
if t.sizes[1] == 26 then
|
|
val = self:toval(t.data[2])
|
|
self:validate(val, 26)
|
|
uw = uw + math.floor(val/0x10000)
|
|
lw = lw + val % 0x10000
|
|
else
|
|
self:error('bad 1-size')
|
|
end
|
|
elseif #t.sizes == 3 then
|
|
if t.sizes[1] == 5 and t.sizes[2] == 5 and t.sizes[3] == 16 then
|
|
val = self:toval(t.data[2])
|
|
self:validate(val, 5)
|
|
uw = uw + val*0x20
|
|
val = self:toval(t.data[3])
|
|
self:validate(val, 5)
|
|
uw = uw + val
|
|
val = self:toval(t.data[4])
|
|
self:validate(val, 16)
|
|
lw = lw + val
|
|
else
|
|
self:error('bad 3-size')
|
|
end
|
|
elseif #t.sizes == 4 then
|
|
if t.sizes[1] == 5 and t.sizes[2] == 5 and t.sizes[3] == 5 and t.sizes[4] == 11 then
|
|
val = self:toval(t.data[2])
|
|
self:validate(val, 5)
|
|
uw = uw + val*0x20
|
|
val = self:toval(t.data[3])
|
|
self:validate(val, 5)
|
|
uw = uw + val
|
|
val = self:toval(t.data[4])
|
|
self:validate(val, 5)
|
|
lw = lw + val*0x800
|
|
val = self:toval(t.data[5])
|
|
self:validate(val, 11)
|
|
lw = lw + val
|
|
else
|
|
self:error('bad 4-size')
|
|
end
|
|
elseif #t.sizes == 5 then
|
|
if t.sizes[1] == 5 and t.sizes[2] == 5 and t.sizes[3] == 5 and t.sizes[4] == 5 and t.sizes[5] == 6 then
|
|
val = self:toval(t.data[2])
|
|
self:validate(val, 5)
|
|
uw = uw + val*0x20
|
|
val = self:toval(t.data[3])
|
|
self:validate(val, 5)
|
|
uw = uw + val
|
|
val = self:toval(t.data[4])
|
|
self:validate(val, 5)
|
|
lw = lw + val*0x800
|
|
val = self:toval(t.data[5])
|
|
self:validate(val, 5)
|
|
lw = lw + val*0x40
|
|
val = self:toval(t.data[6])
|
|
self:validate(val, 6)
|
|
lw = lw + val
|
|
else
|
|
self:error('bad 5-size')
|
|
end
|
|
else
|
|
self:error('unknown n-size')
|
|
end
|
|
|
|
self:print(uw, lw)
|
|
end
|
|
end
|
|
|
|
function main()
|
|
Parser:parse(asm)
|
|
end
|
|
|
|
local ok, msg = pcall(main)
|
|
if not ok then
|
|
print(msg)
|
|
end
|