mirror of
https://github.com/notwa/mm
synced 2024-11-05 08:29:02 -08:00
1845 lines
54 KiB
Lua
1845 lines
54 KiB
Lua
-- lips.lua
|
|
|
|
local assembler = {
|
|
_DESCRIPTION = 'Assembles MIPS assembly files for the R4300i CPU.',
|
|
_URL = 'https://github.com/notwa/lips/',
|
|
_LICENSE = [[
|
|
Copyright (C) 2015 Connor Olding
|
|
|
|
This program is licensed under the terms of the MIT License, and
|
|
is distributed without any warranty. You should have received a
|
|
copy of the license along with this program; see the file LICENSE.
|
|
]],
|
|
}
|
|
|
|
local byte = string.byte
|
|
local char = string.char
|
|
local find = string.find
|
|
local format = string.format
|
|
local floor = math.floor
|
|
local insert = table.insert
|
|
|
|
local Class = function(inherit)
|
|
local class = {}
|
|
local mt_obj = {__index = class}
|
|
local mt_class = {
|
|
__call = function(self, ...)
|
|
local obj = setmetatable({}, mt_obj)
|
|
obj:init(...)
|
|
return obj
|
|
end,
|
|
__index = inherit,
|
|
}
|
|
|
|
return setmetatable(class, mt_class)
|
|
end
|
|
|
|
local function bitrange(x, lower, upper)
|
|
return floor(x/2^lower) % 2^(upper - lower + 1)
|
|
end
|
|
|
|
local function readfile(fn)
|
|
local f = io.open(fn, 'r')
|
|
if not f then
|
|
error('could not open assembly file for reading: '..tostring(fn), 2)
|
|
end
|
|
local asm = f:read('*a')
|
|
f:close()
|
|
return asm
|
|
end
|
|
|
|
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', 'FP', 'RA',
|
|
}
|
|
|
|
local sys_registers = {
|
|
[0]=
|
|
"INDEX", "RANDOM", "ENTRYLO0", "ENTRYLO1",
|
|
"CONTEXT", "PAGEMASK", "WIRED", "RESERVED0",
|
|
"BADVADDR", "COUNT", "ENTRYHI", "COMPARE",
|
|
"STATUS", "CAUSE", "EPC", "PREVID",
|
|
"CONFIG", "LLADDR", "WATCHLO", "WATCHHI",
|
|
"XCONTEXT", "RESERVED1", "RESERVED2", "RESERVED3",
|
|
"RESERVED4", "RESERVED5", "PERR", "CACHEERR",
|
|
"TAGLO", "TAGHI", "ERROREPC", "RESERVED6",
|
|
}
|
|
|
|
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_directives = {
|
|
'ALIGN', 'SKIP',
|
|
'ASCII', 'ASCIIZ',
|
|
'BYTE', 'HALFWORD', 'WORD', 'FLOAT',
|
|
--'HEX', -- excluded here due to different syntax
|
|
'INC', 'INCASM', 'INCLUDE',
|
|
'INCBIN',
|
|
'ORG',
|
|
}
|
|
|
|
local all_registers = {}
|
|
for k, v in pairs(registers) do
|
|
all_registers[k] = v
|
|
end
|
|
for k, v in pairs(sys_registers) do
|
|
all_registers[k + 32] = v
|
|
end
|
|
for k, v in pairs(fpu_registers) do
|
|
all_registers[k + 64] = 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(sys_registers)
|
|
revtable(fpu_registers)
|
|
revtable(all_registers)
|
|
revtable(all_directives)
|
|
|
|
registers['ZERO'] = 0
|
|
all_registers['ZERO'] = 0
|
|
registers['S8'] = 30
|
|
all_registers['S8'] = 30
|
|
|
|
for i=0, 31 do
|
|
local r = 'REG'..tostring(i)
|
|
registers[r] = i
|
|
all_registers[r] = i
|
|
end
|
|
|
|
local fmt_single = 16
|
|
local fmt_double = 17
|
|
local fmt_word = 20
|
|
local fmt_long = 21
|
|
|
|
local instructions = {
|
|
--[[
|
|
data guide:
|
|
--INSTRUCTION_NAME = {opcode, infmt, outfmt, const, fmtconst},
|
|
underscores are translated to dots later.
|
|
opcode: the first 6 bits of the instruction.
|
|
infmt: the input format; one character per argument.
|
|
outfmt: the output format: R-, I-, and J-types are inferred by length.
|
|
const: (optional) the number to replace 'C' with in outfmt.
|
|
fmtconst: (optional) the number to replace 'F' with in outfmt.
|
|
|
|
input format guide:
|
|
such and such: expects a...
|
|
d: register for rd
|
|
s: register for rs
|
|
t: register for rt
|
|
D: floating point register for fd
|
|
S: floating point register for fs
|
|
T: floating point register for ft
|
|
X: system register for rd
|
|
Y: system register for rs (unused)
|
|
Z: system register for rt (unused)
|
|
o: constant for offset
|
|
b: register to dereference for base
|
|
r: relative constant or label for offset
|
|
I: constant or label for index (long jump)
|
|
i: immediate (must fit in a halfword; cannot be a label)
|
|
k: immediate to negate (must fit in a halfword; cannot be a label)
|
|
K: signed immediate (-0x8000 <= immediate < 0x10000; cannot be a label)
|
|
|
|
output format guide:
|
|
such and such: writes ... at this position
|
|
0: zero (sometimes used to refer to R0)
|
|
d: rd
|
|
s: rs
|
|
t: rt
|
|
D: fd
|
|
S: fs
|
|
T: ft
|
|
o: offset
|
|
b: base
|
|
i: immediate (infmt 'i' and 'k' both write to here)
|
|
I: index
|
|
C: constant (given in argument immediately after)
|
|
F: format constant (given in argument after constant)
|
|
--]]
|
|
|
|
J = {2, 'I', 'I'},
|
|
JAL = {3, 'I', 'I'},
|
|
|
|
JALR = {0, 'ds', 's0d0C', 9},
|
|
|
|
MTHI = {0, 's', 's000C', 17},
|
|
MTLO = {0, 's', 's000C', 19},
|
|
JR = {0, 's', 's000C', 8},
|
|
|
|
BREAK = {0, '', '0000C', 13},
|
|
SYSCALL = {0, '', '0000C', 12},
|
|
|
|
SYNC = {0, '', '0000C', 15},
|
|
|
|
LB = {32, 'tob', 'bto'},
|
|
LBU = {36, 'tob', 'bto'},
|
|
LD = {55, 'tob', 'bto'},
|
|
LDL = {26, 'tob', 'bto'},
|
|
LDR = {27, 'tob', 'bto'},
|
|
LH = {33, 'tob', 'bto'},
|
|
LHU = {37, 'tob', 'bto'},
|
|
LL = {48, 'tob', 'bto'},
|
|
LLD = {52, 'tob', 'bto'},
|
|
LW = {35, 'tob', 'bto'},
|
|
LWL = {34, 'tob', 'bto'},
|
|
LWR = {38, 'tob', 'bto'},
|
|
LWU = {39, 'tob', 'bto'},
|
|
SB = {40, 'tob', 'bto'},
|
|
SC = {56, 'tob', 'bto'},
|
|
SCD = {60, 'tob', 'bto'},
|
|
SD = {63, 'tob', 'bto'},
|
|
SDL = {44, 'tob', 'bto'},
|
|
SDR = {45, 'tob', 'bto'},
|
|
SH = {41, 'tob', 'bto'},
|
|
SW = {43, 'tob', 'bto'},
|
|
SWL = {42, 'tob', 'bto'},
|
|
SWR = {46, 'tob', 'bto'},
|
|
|
|
LUI = {15, 'ti', '0ti'},
|
|
|
|
MFHI = {0, 'd', '00d0C', 16},
|
|
MFLO = {0, 'd', '00d0C', 18},
|
|
|
|
ADDI = { 8, 'tsK', 'sti'},
|
|
ADDIU = { 9, 'tsK', 'sti'},
|
|
ANDI = {12, 'tsK', 'sti'},
|
|
DADDI = {24, 'tsK', 'sti'},
|
|
DADDIU = {25, 'tsK', 'sti'},
|
|
ORI = {13, 'tsi', 'sti'},
|
|
SLTI = {10, 'tsi', 'sti'},
|
|
SLTIU = {11, 'tsi', 'sti'},
|
|
XORI = {14, 'tsi', 'sti'},
|
|
|
|
ADD = {0, 'dst', 'std0C', 32},
|
|
ADDU = {0, 'dst', 'std0C', 33},
|
|
AND = {0, 'dst', 'std0C', 36},
|
|
DADD = {0, 'dst', 'std0C', 44},
|
|
DADDU = {0, 'dst', 'std0C', 45},
|
|
DSLLV = {0, 'dst', 'std0C', 20},
|
|
DSUB = {0, 'dst', 'std0C', 46},
|
|
DSUBU = {0, 'dst', 'std0C', 47},
|
|
NOR = {0, 'dst', 'std0C', 39},
|
|
OR = {0, 'dst', 'std0C', 37},
|
|
SLLV = {0, 'dst', 'std0C', 4},
|
|
SLT = {0, 'dst', 'std0C', 42},
|
|
SLTU = {0, 'dst', 'std0C', 43},
|
|
SRAV = {0, 'dst', 'std0C', 7},
|
|
SRLV = {0, 'dst', 'std0C', 6},
|
|
SUB = {0, 'dst', 'std0C', 34},
|
|
SUBU = {0, 'dst', 'std0C', 35},
|
|
XOR = {0, 'dst', 'std0C', 38},
|
|
|
|
DDIV = {0, 'st', 'st00C', 30},
|
|
DDIVU = {0, 'st', 'st00C', 31},
|
|
DIV = {0, 'st', 'st00C', 26},
|
|
DIVU = {0, 'st', 'st00C', 27},
|
|
DMULT = {0, 'st', 'st00C', 28},
|
|
DMULTU = {0, 'st', 'st00C', 29},
|
|
MULT = {0, 'st', 'st00C', 24},
|
|
MULTU = {0, 'st', 'st00C', 25},
|
|
|
|
DSLL = {0, 'dti', '0tdiC', 56},
|
|
DSLL32 = {0, 'dti', '0tdiC', 60},
|
|
DSRA = {0, 'dti', '0tdiC', 59},
|
|
DSRA32 = {0, 'dti', '0tdiC', 63},
|
|
DSRAV = {0, 'dts', '0tdsC', 23},
|
|
DSRL = {0, 'dti', '0tdiC', 58},
|
|
DSRL32 = {0, 'dti', '0tdiC', 62},
|
|
DSRLV = {0, 'dts', '0tdsC', 22},
|
|
SLL = {0, 'dti', '0tdiC', 0},
|
|
SRA = {0, 'dti', '0tdiC', 3},
|
|
SRL = {0, 'dti', '0tdiC', 2},
|
|
|
|
BEQ = { 4, 'str', 'sto'},
|
|
BEQL = {20, 'str', 'sto'},
|
|
BNE = { 5, 'str', 'sto'},
|
|
BNEL = {21, 'str', 'sto'},
|
|
|
|
BGEZ = { 1, 'sr', 'sCo', 1},
|
|
BGEZAL = { 1, 'sr', 'sCo', 17},
|
|
BGEZALL = { 1, 'sr', 'sCo', 19},
|
|
BGEZL = { 1, 'sr', 'sCo', 3},
|
|
BGTZ = { 7, 'sr', 'sCo', 0},
|
|
BGTZL = {23, 'sr', 'sCo', 0},
|
|
BLEZ = { 6, 'sr', 'sCo', 0},
|
|
BLEZL = {22, 'sr', 'sCo', 0},
|
|
BLTZ = { 1, 'sr', 'sCo', 0},
|
|
BLTZAL = { 1, 'sr', 'sCo', 16},
|
|
BLTZALL = { 1, 'sr', 'sCo', 18},
|
|
BLTZL = { 1, 'sr', 'sCo', 2},
|
|
|
|
TEQ = {0, 'st', 'st00C', 52},
|
|
TGE = {0, 'st', 'st00C', 48},
|
|
TGEU = {0, 'st', 'st00C', 49},
|
|
TLT = {0, 'st', 'st00C', 50},
|
|
TLTU = {0, 'st', 'st00C', 51},
|
|
TNE = {0, 'st', 'st00C', 54},
|
|
|
|
ADD_D = {17, 'DST', 'FTSDC', 0, fmt_double},
|
|
ADD_S = {17, 'DST', 'FTSDC', 0, fmt_single},
|
|
DIV_D = {17, 'DST', 'FTSDC', 3, fmt_double},
|
|
DIV_S = {17, 'DST', 'FTSDC', 3, fmt_single},
|
|
MUL_D = {17, 'DST', 'FTSDC', 2, fmt_double},
|
|
MUL_S = {17, 'DST', 'FTSDC', 2, fmt_single},
|
|
SUB_D = {17, 'DST', 'FTSDC', 1, fmt_double},
|
|
SUB_S = {17, 'DST', 'FTSDC', 1, fmt_single},
|
|
|
|
CFC1 = {17, 'tS', 'CtS00', 2},
|
|
CTC1 = {17, 'tS', 'CtS00', 6},
|
|
DMFC1 = {17, 'tS', 'CtS00', 1},
|
|
DMTC1 = {17, 'tS', 'CtS00', 5},
|
|
MFC0 = {16, 'tX', 'Ctd00', 0},
|
|
MFC1 = {17, 'tS', 'CtS00', 0},
|
|
MTC0 = {16, 'tX', 'Ctd00', 4},
|
|
MTC1 = {17, 'tS', 'CtS00', 4},
|
|
|
|
LDC1 = {53, 'Tob', 'bTo'},
|
|
LWC1 = {49, 'Tob', 'bTo'},
|
|
SDC1 = {61, 'Tob', 'bTo'},
|
|
SWC1 = {57, 'Tob', 'bTo'},
|
|
|
|
C_EQ_D = {17, 'ST', 'FTS0C', 50, fmt_double},
|
|
C_EQ_S = {17, 'ST', 'FTS0C', 50, fmt_single},
|
|
C_F_D = {17, 'ST', 'FTS0C', 48, fmt_double},
|
|
C_F_S = {17, 'ST', 'FTS0C', 48, fmt_single},
|
|
C_LE_D = {17, 'ST', 'FTS0C', 62, fmt_double},
|
|
C_LE_S = {17, 'ST', 'FTS0C', 62, fmt_single},
|
|
C_LT_D = {17, 'ST', 'FTS0C', 60, fmt_double},
|
|
C_LT_S = {17, 'ST', 'FTS0C', 60, fmt_single},
|
|
C_NGE_D = {17, 'ST', 'FTS0C', 61, fmt_double},
|
|
C_NGE_S = {17, 'ST', 'FTS0C', 61, fmt_single},
|
|
C_NGL_D = {17, 'ST', 'FTS0C', 59, fmt_double},
|
|
C_NGL_S = {17, 'ST', 'FTS0C', 59, fmt_single},
|
|
C_NGLE_D= {17, 'ST', 'FTS0C', 57, fmt_double},
|
|
C_NGLE_S= {17, 'ST', 'FTS0C', 57, fmt_single},
|
|
C_NGT_D = {17, 'ST', 'FTS0C', 63, fmt_double},
|
|
C_NGT_S = {17, 'ST', 'FTS0C', 63, fmt_single},
|
|
C_OLE_D = {17, 'ST', 'FTS0C', 54, fmt_double},
|
|
C_OLE_S = {17, 'ST', 'FTS0C', 54, fmt_single},
|
|
C_OLT_D = {17, 'ST', 'FTS0C', 52, fmt_double},
|
|
C_OLT_S = {17, 'ST', 'FTS0C', 52, fmt_single},
|
|
C_SEQ_D = {17, 'ST', 'FTS0C', 58, fmt_double},
|
|
C_SEQ_S = {17, 'ST', 'FTS0C', 58, fmt_single},
|
|
C_SF_D = {17, 'ST', 'FTS0C', 56, fmt_double},
|
|
C_SF_S = {17, 'ST', 'FTS0C', 56, fmt_single},
|
|
C_UEQ_D = {17, 'ST', 'FTS0C', 51, fmt_double},
|
|
C_UEQ_S = {17, 'ST', 'FTS0C', 51, fmt_single},
|
|
C_ULE_D = {17, 'ST', 'FTS0C', 55, fmt_double},
|
|
C_ULE_S = {17, 'ST', 'FTS0C', 55, fmt_single},
|
|
C_ULT_D = {17, 'ST', 'FTS0C', 53, fmt_double},
|
|
C_ULT_S = {17, 'ST', 'FTS0C', 53, fmt_single},
|
|
C_UN_D = {17, 'ST', 'FTS0C', 49, fmt_double},
|
|
C_UN_S = {17, 'ST', 'FTS0C', 49, fmt_single},
|
|
|
|
CVT_D_L = {17, 'DS', 'F0SDC', 33, fmt_long},
|
|
CVT_D_S = {17, 'DS', 'F0SDC', 33, fmt_single},
|
|
CVT_D_W = {17, 'DS', 'F0SDC', 33, fmt_word},
|
|
CVT_L_D = {17, 'DS', 'F0SDC', 37, fmt_double},
|
|
CVT_L_S = {17, 'DS', 'F0SDC', 37, fmt_single},
|
|
CVT_S_D = {17, 'DS', 'F0SDC', 32, fmt_double},
|
|
CVT_S_L = {17, 'DS', 'F0SDC', 32, fmt_long},
|
|
CVT_S_W = {17, 'DS', 'F0SDC', 32, fmt_word},
|
|
CVT_W_D = {17, 'DS', 'F0SDC', 36, fmt_double},
|
|
CVT_W_S = {17, 'DS', 'F0SDC', 36, fmt_single},
|
|
|
|
ABS_D = {17, 'DS', 'F0SDC', 5, fmt_double},
|
|
ABS_S = {17, 'DS', 'F0SDC', 5, fmt_single},
|
|
CEIL_L_D= {17, 'DS', 'F0SDC', 10, fmt_double},
|
|
CEIL_L_S= {17, 'DS', 'F0SDC', 10, fmt_single},
|
|
CEIL_W_D= {17, 'DS', 'F0SDC', 14, fmt_double},
|
|
CEIL_W_S= {17, 'DS', 'F0SDC', 14, fmt_single},
|
|
FLOOR_L_D={17, 'DS', 'F0SDC', 11, fmt_double},
|
|
FLOOR_L_S={17, 'DS', 'F0SDC', 11, fmt_single},
|
|
FLOOR_W_D={17, 'DS', 'F0SDC', 15, fmt_double},
|
|
FLOOR_W_S={17, 'DS', 'F0SDC', 15, fmt_single},
|
|
MOV_D = {17, 'DS', 'F0SDC', 6, fmt_double},
|
|
MOV_S = {17, 'DS', 'F0SDC', 6, fmt_single},
|
|
NEG_D = {17, 'DS', 'F0SDC', 7, fmt_double},
|
|
NEG_S = {17, 'DS', 'F0SDC', 7, fmt_single},
|
|
ROUND_L_D={17, 'DS', 'F0SDC', 8, fmt_double},
|
|
ROUND_L_S={17, 'DS', 'F0SDC', 8, fmt_single},
|
|
ROUND_W_D={17, 'DS', 'F0SDC', 12, fmt_double},
|
|
ROUND_W_S={17, 'DS', 'F0SDC', 12, fmt_single},
|
|
SQRT_D = {17, 'DS', 'F0SDC', 4, fmt_double},
|
|
SQRT_S = {17, 'DS', 'F0SDC', 4, fmt_single},
|
|
TRUNC_L_D={17, 'DS', 'F0SDC', 9, fmt_double},
|
|
TRUNC_L_S={17, 'DS', 'F0SDC', 9, fmt_single},
|
|
TRUNC_W_D={17, 'DS', 'F0SDC', 13, fmt_double},
|
|
TRUNC_W_S={17, 'DS', 'F0SDC', 13, fmt_double},
|
|
|
|
TEQI = {1, 'si', 'sCi', 12},
|
|
TGEI = {1, 'si', 'sCi', 8},
|
|
TGEIU = {1, 'si', 'sCi', 9},
|
|
TLTI = {1, 'si', 'sCi', 10},
|
|
TLTIU = {1, 'si', 'sCi', 11},
|
|
TNEI = {1, 'si', 'sCi', 14},
|
|
|
|
-- immediate limited to 3 bits?
|
|
CACHE = {47, 'iob', 'bio'},
|
|
|
|
-- misuses 'F' to write the initial bit
|
|
ERET = {16, '', 'F000C', 24, 16},
|
|
TLBP = {16, '', 'F000C', 8, 16},
|
|
TLBR = {16, '', 'F000C', 1, 16},
|
|
TLBWI = {16, '', 'F000C', 2, 16},
|
|
TLBWR = {16, '', 'F000C', 6, 16},
|
|
|
|
-- only one condition code on the R4300i?
|
|
BC1F = {17, 'r', 'FCo', 0, 8},
|
|
BC1FL = {17, 'r', 'FCo', 2, 8},
|
|
BC1T = {17, 'r', 'FCo', 1, 8},
|
|
BC1TL = {17, 'r', 'FCo', 3, 8},
|
|
|
|
-- pseudo-instructions
|
|
B = {4, 'r', '00o'}, -- BEQ R0, R0, offset
|
|
BAL = {1, 'r', '0Co', 17}, -- BGEZAL R0, offset
|
|
BEQZ = {4, 'sr', 's0o'}, -- BEQ RS, R0, offset
|
|
BNEZ = {5, 'sr', 's0o'}, -- BNE RS, R0, offset
|
|
CL = {0, 'd', '00d0C', 37}, -- OR RD, R0, R0
|
|
MOV = {0, 'ds', 's0d0C', 37}, -- OR RD, RS, R0
|
|
NEG = {0, 'dt', '0td0C', 34}, -- SUB RD, R0, RT
|
|
NOP = {0, '', '0'}, -- SLL R0, R0, 0
|
|
NOT = {0, 'ds', 's0d0C', 39}, -- NOR RD, RS, R0
|
|
SUBI = {8, 'tsk', 'sti'}, -- ADDI RT, RS, -immediate
|
|
SUBIU = {9, 'tsk', 'sti'}, -- ADDIU RT, RS, -immediate
|
|
|
|
-- ...that expand to multiple instructions
|
|
LI = {}, -- only one instruction for values < 0x10000
|
|
LA = {},
|
|
|
|
-- variable arguments
|
|
PUSH = {},
|
|
POP = {},
|
|
JPOP = {},
|
|
|
|
ABS = {}, -- BGEZ NOP SUB?
|
|
MUL = {}, -- MULT MFLO
|
|
--DIV = {}, -- 3 arguments
|
|
REM = {}, -- 3 arguments
|
|
|
|
NAND = {}, -- AND, NOT
|
|
NANDI = {}, -- ANDI, NOT
|
|
NORI = {}, -- ORI, NOT
|
|
ROL = {}, -- SLL, SRL, OR
|
|
ROR = {}, -- SRL, SLL, OR
|
|
|
|
SEQ = {}, SEQI = {}, SEQIU = {}, SEQU = {},
|
|
SGE = {}, SGEI = {}, SGEIU = {}, SGEU = {},
|
|
SGT = {}, SGTI = {}, SGTIU = {}, SGTU = {},
|
|
SLE = {}, SLEI = {}, SLEIU = {}, SLEU = {},
|
|
SNE = {}, SNEI = {}, SNEIU = {}, SNEU = {},
|
|
|
|
BEQI = {},
|
|
BNEI = {},
|
|
BGE = {}, BGEI = {},
|
|
BLE = {}, BLEI = {},
|
|
BLT = {}, BLTI = {},
|
|
BGT = {}, BGTI = {},
|
|
}
|
|
|
|
local all_instructions = {}
|
|
local i = 1
|
|
for k, v in pairs(instructions) do
|
|
all_instructions[k:gsub('_', '.')] = i
|
|
i = i + 1
|
|
end
|
|
revtable(all_instructions)
|
|
|
|
local Lexer = Class()
|
|
function Lexer:init(asm, fn, options)
|
|
self.asm = asm
|
|
self.fn = fn or '(string)'
|
|
self.options = options or {}
|
|
self.pos = 1
|
|
self.line = 1
|
|
self.EOF = -1
|
|
self:nextc()
|
|
end
|
|
|
|
local Dumper = Class()
|
|
function Dumper:init(writer, fn, options)
|
|
self.writer = writer
|
|
self.fn = fn or '(string)'
|
|
self.options = options or {}
|
|
self.labels = {}
|
|
self.commands = {}
|
|
self.pos = options.offset or 0
|
|
self.lastcommand = nil
|
|
end
|
|
|
|
local Parser = Class()
|
|
function Parser:init(writer, fn, options)
|
|
self.fn = fn or '(string)'
|
|
self.main_fn = self.fn
|
|
self.options = options or {}
|
|
self.dumper = Dumper(writer, fn, options)
|
|
self.defines = {}
|
|
end
|
|
|
|
function Lexer:error(msg)
|
|
error(format('%s:%d: Error: %s', self.fn, self.line, msg), 2)
|
|
end
|
|
|
|
function Lexer:nextc()
|
|
if self.pos > #self.asm then
|
|
self.ord = self.EOF
|
|
self.ord2 = self.EOF
|
|
self.chr = ''
|
|
self.chr2 = ''
|
|
self.chrchr = ''
|
|
return
|
|
end
|
|
|
|
if self.chr == '\n' then
|
|
self.line = self.line + 1
|
|
end
|
|
|
|
self.ord = 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 byte(self.asm, self.pos) == 10 then
|
|
self.pos = self.pos + 1
|
|
end
|
|
self.ord = 10
|
|
end
|
|
|
|
self.chr = char(self.ord)
|
|
if self.pos <= #self.asm then
|
|
self.ord2 = byte(self.asm, self.pos)
|
|
self.chr2 = char(self.ord2)
|
|
self.chrchr = char(self.ord, self.ord2)
|
|
else
|
|
self.ord2 = self.EOF
|
|
self.chr2 = ''
|
|
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:read_chars(pattern)
|
|
local buff = ''
|
|
while find(self.chr, pattern) do
|
|
buff = buff..self.chr
|
|
self:nextc()
|
|
end
|
|
return buff
|
|
end
|
|
|
|
function Lexer:read_decimal()
|
|
local buff = self:read_chars('%d')
|
|
local num = tonumber(buff)
|
|
if not num then self:error('invalid decimal number') end
|
|
return num
|
|
end
|
|
|
|
function Lexer:read_hex()
|
|
local buff = self:read_chars('%x')
|
|
local num = tonumber(buff, 16)
|
|
if not num then self:error('invalid hex number') end
|
|
return num
|
|
end
|
|
|
|
function Lexer:read_octal()
|
|
local buff = self:read_chars('[0-7]')
|
|
local num = tonumber(buff, 8)
|
|
if not num then self:error('invalid octal number') end
|
|
return num
|
|
end
|
|
|
|
function Lexer:read_binary()
|
|
local buff = self:read_chars('[01]')
|
|
local num = tonumber(buff, 2)
|
|
if not num then self:error('invalid binary number') end
|
|
return num
|
|
end
|
|
|
|
function Lexer:read_number()
|
|
if self.chr == '%' then
|
|
self:nextc()
|
|
return self:read_binary()
|
|
elseif self.chr == '$' then
|
|
self:nextc()
|
|
return self:read_hex()
|
|
elseif self.chr:find('%d') then
|
|
if self.chr2 == 'x' or self.chr2 == 'X' then
|
|
self:nextc()
|
|
self:nextc()
|
|
return self:read_hex()
|
|
elseif self.chr == '0' and self.chr2:find('%d') then
|
|
self:nextc()
|
|
return self:read_octal()
|
|
else
|
|
return self:read_decimal()
|
|
end
|
|
elseif self.chr == '#' then
|
|
self:nextc()
|
|
return self:read_decimal()
|
|
end
|
|
end
|
|
|
|
function Lexer:lex_hex(yield)
|
|
local hexmatch = '[0-9A-Fa-f]'
|
|
local entered = false
|
|
while true do
|
|
if self.chr == '\n' then
|
|
self:nextc()
|
|
yield('EOL', '\n')
|
|
elseif self.ord == self.EOF then
|
|
self:error('unexpected EOF; incomplete hex directive')
|
|
elseif self.chr == ';' then
|
|
self:skip_to_EOL()
|
|
elseif self.chrchr == '//' then
|
|
self:skip_to_EOL()
|
|
elseif self.chrchr == '/*' then
|
|
self:nextc()
|
|
self:nextc()
|
|
self:lex_block_comment(yield)
|
|
elseif self.chr:find('%s') then
|
|
self:nextc()
|
|
elseif self.chr == '{' then
|
|
if entered then
|
|
self:error('unexpected opening brace')
|
|
end
|
|
self:nextc()
|
|
entered = true
|
|
elseif self.chr == '}' then
|
|
if not entered then
|
|
self:error('expected opening brace')
|
|
end
|
|
self:nextc()
|
|
break
|
|
elseif self.chr == ',' then
|
|
self:error('commas are not allowed in HEX directives')
|
|
elseif self.chr:find(hexmatch) and self.chr2:find(hexmatch) then
|
|
local num = tonumber(self.chrchr, 16)
|
|
self:nextc()
|
|
self:nextc()
|
|
if self.chr:find(hexmatch) then
|
|
self:error('too many hex digits to be a single byte')
|
|
end
|
|
yield('DIR', 'BYTE')
|
|
yield('NUM', num)
|
|
elseif self.chr:find(hexmatch) then
|
|
self:error('expected two hex digits to make a byte')
|
|
else
|
|
if entered then
|
|
self:error('expected bytes given in hex or closing brace')
|
|
else
|
|
self:error('expected opening brace')
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
function Lexer:lex_block_comment(yield)
|
|
while true do
|
|
if self.chr == '\n' then
|
|
self:nextc()
|
|
yield('EOL', '\n')
|
|
elseif self.ord == self.EOF then
|
|
self:error('unexpected EOF; incomplete block comment')
|
|
elseif self.chrchr == '*/' then
|
|
self:nextc()
|
|
self:nextc()
|
|
break
|
|
else
|
|
self:nextc()
|
|
end
|
|
end
|
|
end
|
|
|
|
function Lexer:lex_string(yield)
|
|
-- TODO: support escaping
|
|
if self.chr ~= '"' then
|
|
self:error("expected opening double quote")
|
|
end
|
|
self:nextc()
|
|
local buff = self:read_chars('[^"\n]')
|
|
if self.chr ~= '"' then
|
|
self:error("expected closing double quote")
|
|
end
|
|
self:nextc()
|
|
yield('STRING', buff)
|
|
end
|
|
|
|
function Lexer:lex_include(_yield)
|
|
self:read_chars('%s')
|
|
local fn
|
|
self:lex_string(function(tt, tok)
|
|
fn = tok
|
|
end)
|
|
if self.options.path then
|
|
fn = self.options.path..fn
|
|
end
|
|
local sublexer = Lexer(readfile(fn), fn, self.options)
|
|
sublexer:lex(_yield)
|
|
end
|
|
|
|
function Lexer:lex(_yield)
|
|
local function yield(tt, tok)
|
|
return _yield(tt, tok, self.fn, self.line)
|
|
end
|
|
while true do
|
|
if self.chr == '\n' then
|
|
self:nextc()
|
|
yield('EOL', '\n')
|
|
elseif self.ord == self.EOF then
|
|
yield('EOF', self.EOF)
|
|
break
|
|
elseif self.chr == ';' then
|
|
self:skip_to_EOL()
|
|
elseif self.chrchr == '//' then
|
|
self:skip_to_EOL()
|
|
elseif self.chrchr == '/*' then
|
|
self:nextc()
|
|
self:nextc()
|
|
self:lex_block_comment(yield)
|
|
elseif self.chr:find('%s') then
|
|
self:nextc()
|
|
elseif self.chr == ',' then
|
|
self:nextc()
|
|
yield('SEP', ',')
|
|
elseif self.chr == '[' then
|
|
self:nextc()
|
|
local buff = 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()
|
|
yield('DEF', buff)
|
|
elseif self.chr == '(' then
|
|
self:nextc()
|
|
local buff = self:read_chars('[%w_]')
|
|
if self.chr ~= ')' then
|
|
self:error('invalid register name')
|
|
end
|
|
self:nextc()
|
|
local up = buff:upper()
|
|
if not all_registers[up] then
|
|
self:error('not a register')
|
|
end
|
|
yield('DEREF', up)
|
|
elseif self.chr == '.' then
|
|
self:nextc()
|
|
local buff = self:read_chars('[%w]')
|
|
local up = buff:upper()
|
|
if not all_directives[up] then
|
|
self:error('not a directive')
|
|
end
|
|
if up == 'INC' or up == 'INCASM' or up == 'INCLUDE' then
|
|
yield('DIR', 'INC')
|
|
self:lex_include(_yield)
|
|
else
|
|
yield('DIR', up)
|
|
end
|
|
elseif self.chr == '@' then
|
|
self:nextc()
|
|
local buff = self:read_chars('[%w_]')
|
|
yield('DEFSYM', buff)
|
|
elseif self.chr:find('[%a_]') then
|
|
local buff = self:read_chars('[%w_.]')
|
|
local up = buff:upper()
|
|
if self.chr == ':' then
|
|
if buff:find('%.') then
|
|
self:error('labels cannot contain dots')
|
|
end
|
|
self:nextc()
|
|
yield('LABEL', buff)
|
|
elseif up == 'HEX' then
|
|
self:lex_hex(yield)
|
|
elseif all_registers[up] then
|
|
yield('REG', up)
|
|
elseif all_instructions[up] then
|
|
yield('INSTR', up:gsub('%.', '_'))
|
|
else
|
|
if buff:find('%.') then
|
|
self:error('labels cannot contain dots')
|
|
end
|
|
yield('LABELSYM', buff)
|
|
end
|
|
elseif self.chr == ']' then
|
|
self:error('unmatched closing bracket')
|
|
elseif self.chr == ')' then
|
|
self:error('unmatched closing parenthesis')
|
|
elseif self.chr == '+' or self.chr == '-' then
|
|
local sign_chr = self.chr
|
|
local sign = sign_chr == '+' and 1 or -1
|
|
local buff = self:read_chars('%'..self.chr)
|
|
if #buff == 1 and self.chr == ':' then
|
|
self:nextc()
|
|
yield('RELLABEL', sign_chr)
|
|
else
|
|
local n = self:read_number()
|
|
if n then
|
|
yield('NUM', sign*n)
|
|
else
|
|
yield('RELLABELSYM', sign*#buff)
|
|
end
|
|
end
|
|
else
|
|
local n = self:read_number()
|
|
if n then
|
|
yield('NUM', n)
|
|
else
|
|
self:error('unknown character or control character')
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
function Parser:error(msg)
|
|
error(format('%s:%d: Error: %s', self.fn, self.line, msg), 2)
|
|
end
|
|
|
|
function Parser:advance()
|
|
self.i = self.i + 1
|
|
local t = self.tokens[self.i]
|
|
self.tt = t.tt
|
|
self.tok = t.tok
|
|
self.fn = t.fn
|
|
self.line = t.line
|
|
return t.tt, t.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()
|
|
local line = self.line
|
|
if name == 'ORG' then
|
|
self.dumper:add_directive(line, name, self:number())
|
|
elseif name == 'ALIGN' or name == 'SKIP' then
|
|
if self:is_EOL() and name == 'ALIGN' then
|
|
self.dumper:add_directive(line, name, 0)
|
|
else
|
|
local size = self:number()
|
|
if self:is_EOL() then
|
|
self.dumper:add_directive(line, name, size)
|
|
else
|
|
self:optional_comma()
|
|
self.dumper:add_directive(line, name, size, self:number())
|
|
end
|
|
self:expect_EOL()
|
|
end
|
|
elseif name == 'BYTE' or name == 'HALFWORD' or name == 'WORD' then
|
|
self.dumper:add_directive(line, name, self:number())
|
|
while not self:is_EOL() do
|
|
self:advance()
|
|
self:optional_comma()
|
|
self.dumper:add_directive(line, name, self:number())
|
|
end
|
|
self:expect_EOL()
|
|
elseif name == 'HEX' then
|
|
self:error('unimplemented')
|
|
elseif name == 'INC' then
|
|
-- noop
|
|
elseif 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
|
|
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(relative, no_label)
|
|
if self.tt ~= 'NUM' and self.tt ~= 'LABELSYM' then
|
|
self:error('expected constant')
|
|
end
|
|
if no_label and self.tt == 'LABELSYM' then
|
|
self:error('labels are not allowed here')
|
|
end
|
|
if relative and self.tt == 'LABELSYM' then
|
|
self.tt = 'LABELREL'
|
|
end
|
|
local t = {self.tt, self.tok}
|
|
self:advance()
|
|
return t
|
|
end
|
|
|
|
function Parser:format_in(informat)
|
|
local args = {}
|
|
for i=1,#informat do
|
|
local c = informat:sub(i, i)
|
|
local c2 = informat:sub(i + 1, i + 1)
|
|
if c == 'd' and not args.rd then
|
|
args.rd = self:register()
|
|
elseif c == 's' and not args.rs then
|
|
args.rs = self:register()
|
|
elseif c == 't' and not args.rt then
|
|
args.rt = self:register()
|
|
elseif c == 'D' and not args.fd then
|
|
args.fd = self:register(fpu_registers)
|
|
elseif c == 'S' and not args.fs then
|
|
args.fs = self:register(fpu_registers)
|
|
elseif c == 'T' and not args.ft then
|
|
args.ft = self:register(fpu_registers)
|
|
elseif c == 'X' and not args.rd then
|
|
args.rd = self:register(sys_registers)
|
|
elseif c == 'Y' and not args.rs then
|
|
args.rs = self:register(sys_registers)
|
|
elseif c == 'Z' and not args.rt then
|
|
args.rt = self:register(sys_registers)
|
|
elseif c == 'o' and not args.offset then
|
|
args.offset = {'SIGNED', self:const()}
|
|
elseif c == 'r' and not args.offset then
|
|
args.offset = {'SIGNED', self:const('relative')}
|
|
elseif c == 'i' and not args.immediate then
|
|
args.immediate = self:const(nil, 'no label')
|
|
elseif c == 'I' and not args.index then
|
|
args.index = {'INDEX', self:const()}
|
|
elseif c == 'k' and not args.immediate then
|
|
args.immediate = {'NEGATE', self:const(nil, 'no label')}
|
|
elseif c == 'K' and not args.immediate then
|
|
args.immediate = {'SIGNED', self:const(nil, 'no label')}
|
|
elseif c == 'b' and not args.base then
|
|
args.base = self:deref()
|
|
else
|
|
error('Internal Error: invalid input formatting string', 1)
|
|
end
|
|
if c2:find('[dstDSTorIikKXYZ]') then
|
|
self:optional_comma()
|
|
end
|
|
end
|
|
return args
|
|
end
|
|
|
|
function Parser:format_out_raw(outformat, first, args, const, formatconst)
|
|
local lookup = {
|
|
[1]=self.dumper.add_instruction_j,
|
|
[3]=self.dumper.add_instruction_i,
|
|
[5]=self.dumper.add_instruction_r,
|
|
}
|
|
out = {}
|
|
for i=1,#outformat do
|
|
local c = outformat:sub(i, i)
|
|
if c == 'd' then
|
|
out[#out+1] = args.rd
|
|
elseif c == 's' then
|
|
out[#out+1] = args.rs
|
|
elseif c == 't' then
|
|
out[#out+1] = args.rt
|
|
elseif c == 'D' then
|
|
out[#out+1] = args.fd
|
|
elseif c == 'S' then
|
|
out[#out+1] = args.fs
|
|
elseif c == 'T' then
|
|
out[#out+1] = args.ft
|
|
elseif c == 'o' then
|
|
out[#out+1] = args.offset
|
|
elseif c == 'i' then
|
|
out[#out+1] = args.immediate
|
|
elseif c == 'I' then
|
|
out[#out+1] = args.index
|
|
elseif c == 'b' then
|
|
out[#out+1] = args.base
|
|
elseif c == '0' then
|
|
out[#out+1] = 0
|
|
elseif c == 'C' then
|
|
out[#out+1] = const
|
|
elseif c == 'F' then
|
|
out[#out+1] = formatconst
|
|
end
|
|
end
|
|
local f = lookup[#outformat]
|
|
if f == nil then
|
|
error('Internal Error: invalid output formatting string', 1)
|
|
end
|
|
f(self.dumper, self.line, first, out[1], out[2], out[3], out[4], out[5])
|
|
end
|
|
|
|
function Parser:format_out(t, args)
|
|
self:format_out_raw(t[3], t[1], args, t[4], t[5])
|
|
end
|
|
|
|
local overrides = {}
|
|
|
|
function overrides.LI(self, name)
|
|
local lui = instructions['LUI']
|
|
local ori = instructions['ORI']
|
|
local addiu = instructions['ADDIU']
|
|
local args = {}
|
|
args.rt = self:register()
|
|
self:optional_comma()
|
|
local im = self:const()
|
|
|
|
-- for us, this is just semantics. for a "real" assembler,
|
|
-- LA could add appropriate RELO LUI/ADDIU directives.
|
|
if im[1] == 'LABELSYM' then
|
|
self:error('use LA for labels')
|
|
end
|
|
|
|
im[2] = im[2] % 0x100000000
|
|
if im[2] >= 0x10000 and im[2] <= 0xFFFF8000 then
|
|
args.rs = args.rt
|
|
args.immediate = {'UPPER', im}
|
|
self:format_out(lui, args)
|
|
if im[2] % 0x10000 ~= 0 then
|
|
args.immediate = {'LOWER', im}
|
|
self:format_out(ori, args)
|
|
end
|
|
elseif im[2] >= 0x8000 and im[2] < 0x10000 then
|
|
args.rs = 'R0'
|
|
args.immediate = {'LOWER', im}
|
|
self:format_out(ori, args)
|
|
else
|
|
args.rs = 'R0'
|
|
args.immediate = {'LOWER', im}
|
|
self:format_out(addiu, args)
|
|
end
|
|
end
|
|
|
|
function overrides.LA(self, name)
|
|
local lui = instructions['LUI']
|
|
local addiu = instructions['ADDIU']
|
|
local args = {}
|
|
args.rt = self:register()
|
|
self:optional_comma()
|
|
local im = self:const()
|
|
|
|
args.rs = args.rt
|
|
args.immediate = {'UPPEROFF', im}
|
|
self:format_out(lui, args)
|
|
args.immediate = {'LOWER', im}
|
|
self:format_out(addiu, args)
|
|
end
|
|
|
|
function overrides.PUSH(self, name)
|
|
local addi = instructions['ADDI']
|
|
local w = instructions[name == 'PUSH' and 'SW' or 'LW']
|
|
local jr = instructions['JR']
|
|
local stack = {}
|
|
while not self:is_EOL() do
|
|
if self.tt == 'NUM' then
|
|
if self.tok < 0 then
|
|
self:error("can't push a negative number of spaces")
|
|
end
|
|
for i=1,self.tok do
|
|
insert(stack, '')
|
|
end
|
|
self:advance()
|
|
else
|
|
insert(stack, self:register())
|
|
end
|
|
if not self:is_EOL() then
|
|
self:optional_comma()
|
|
end
|
|
end
|
|
if #stack == 0 then
|
|
self:error(name..' requires at least one argument')
|
|
end
|
|
local args = {}
|
|
if name == 'PUSH' then
|
|
args.rt = 'SP'
|
|
args.rs = 'SP'
|
|
args.immediate = {'NEGATE', {'NUM', #stack*4}}
|
|
self:format_out(addi, args)
|
|
end
|
|
args.base = 'SP'
|
|
for i, r in ipairs(stack) do
|
|
args.rt = r
|
|
if r ~= '' then
|
|
args.offset = {'NUM', (i - 1)*4}
|
|
self:format_out(w, args)
|
|
end
|
|
end
|
|
if name == 'JPOP' then
|
|
args.rs = 'RA'
|
|
self:format_out(jr, args)
|
|
end
|
|
if name == 'POP' or name == 'JPOP' then
|
|
args.rt = 'SP'
|
|
args.rs = 'SP'
|
|
args.immediate = {'NUM', #stack*4}
|
|
self:format_out(addi, args)
|
|
end
|
|
end
|
|
overrides.POP = overrides.PUSH
|
|
overrides.JPOP = overrides.PUSH
|
|
|
|
function overrides.NAND(self, name)
|
|
local and_ = instructions['AND']
|
|
local nor = instructions['NOR']
|
|
local args = {}
|
|
args.rd = self:register()
|
|
self:optional_comma()
|
|
args.rs = self:register()
|
|
self:optional_comma()
|
|
args.rt = self:register()
|
|
self:format_out(and_, args)
|
|
args.rs = args.rd
|
|
args.rt = 'R0'
|
|
self:format_out(nor, args)
|
|
end
|
|
|
|
function overrides.NANDI(self, name)
|
|
local andi = instructions['ANDI']
|
|
local nor = instructions['NOR']
|
|
local args = {}
|
|
args.rt = self:register()
|
|
self:optional_comma()
|
|
args.rs = self:register()
|
|
self:optional_comma()
|
|
args.immediate = self:const()
|
|
self:format_out(andi[3], andi[1], args, andi[4], andi[5])
|
|
args.rd = args.rt
|
|
args.rs = args.rt
|
|
args.rt = 'R0'
|
|
self:format_out(nor[3], nor[1], args, nor[4], nor[5])
|
|
end
|
|
|
|
function overrides.NORI(self, name)
|
|
local ori = instructions['ORI']
|
|
local nor = instructions['NOR']
|
|
local args = {}
|
|
args.rt = self:register()
|
|
self:optional_comma()
|
|
args.rs = self:register()
|
|
self:optional_comma()
|
|
args.immediate = self:const()
|
|
self:format_out(ori, args)
|
|
args.rd = args.rt
|
|
args.rs = args.rt
|
|
args.rt = 'R0'
|
|
self:format_out(nor, args)
|
|
end
|
|
|
|
function overrides.ROL(self, name)
|
|
local sll = instructions['SLL']
|
|
local srl = instructions['SRL']
|
|
local or_ = instructions['OR']
|
|
local args = {}
|
|
local left = self:register()
|
|
self:optional_comma()
|
|
args.rt = self:register()
|
|
self:optional_comma()
|
|
args.immediate = self:const()
|
|
args.rd = left
|
|
if args.rd == 'AT' or args.rt == 'AT' then
|
|
self:error('registers cannot be AT in this pseudo-instruction')
|
|
end
|
|
if args.rd == args.rt and args.rd ~= 'R0' then
|
|
self:error('registers cannot be the same')
|
|
end
|
|
self:format_out(sll, args)
|
|
args.rd = 'AT'
|
|
args.immediate = {'NUM', 32 - args.immediate[2]}
|
|
self:format_out(srl, args)
|
|
args.rd = left
|
|
args.rs = left
|
|
args.rt = 'AT'
|
|
self:format_out(or_, args)
|
|
end
|
|
|
|
function overrides.ROR(self, name)
|
|
local sll = instructions['SLL']
|
|
local srl = instructions['SRL']
|
|
local or_ = instructions['OR']
|
|
local args = {}
|
|
local right = self:register()
|
|
self:optional_comma()
|
|
args.rt = self:register()
|
|
self:optional_comma()
|
|
args.immediate = self:const()
|
|
args.rd = right
|
|
if args.rt == 'AT' or args.rd == 'AT' then
|
|
self:error('registers cannot be AT in a pseudo-instruction that uses AT')
|
|
end
|
|
if args.rd == args.rt and args.rd ~= 'R0' then
|
|
self:error('registers cannot be the same')
|
|
end
|
|
self:format_out(srl, args)
|
|
args.rd = 'AT'
|
|
args.immediate = {'NUM', 32 - args.immediate[2]}
|
|
self:format_out(sll, args)
|
|
args.rd = right
|
|
args.rs = right
|
|
args.rt = 'AT'
|
|
self:format_out(or_, args)
|
|
end
|
|
|
|
function overrides.JR(self, name)
|
|
local jr = instructions['JR']
|
|
local args = {}
|
|
if self:is_EOL() then
|
|
args.rs = 'RA'
|
|
else
|
|
args.rs = self:register()
|
|
end
|
|
self:format_out(jr, args)
|
|
end
|
|
|
|
local branch_basics = {
|
|
BEQI = "BEQ",
|
|
BGEI = "BEQ",
|
|
BGTI = "BEQ",
|
|
BLEI = "BNE",
|
|
BLTI = "BNE",
|
|
BNEI = "BNE",
|
|
}
|
|
|
|
function overrides.BEQI(self, name)
|
|
local addiu = instructions['ADDIU']
|
|
local branch = instructions[branch_basics[name]]
|
|
local args = {}
|
|
local reg = self:register()
|
|
self:optional_comma()
|
|
args.immediate = self:const()
|
|
self:optional_comma()
|
|
args.offset = {'SIGNED', self:const('relative')}
|
|
|
|
if reg == 'AT' then
|
|
self:error('register cannot be AT in this pseudo-instruction')
|
|
end
|
|
|
|
args.rt = 'AT'
|
|
args.rs = 'R0'
|
|
self:format_out(addiu, args)
|
|
|
|
args.rs = reg
|
|
self:format_out(branch, args)
|
|
end
|
|
overrides.BNEI = overrides.BEQI
|
|
|
|
function overrides.BLTI(self, name)
|
|
local slti = instructions['SLTI']
|
|
local branch = instructions[branch_basics[name]]
|
|
local args = {}
|
|
args.rs = self:register()
|
|
self:optional_comma()
|
|
args.immediate = self:const()
|
|
self:optional_comma()
|
|
args.offset = {'SIGNED', self:const('relative')}
|
|
|
|
if reg == 'AT' then
|
|
self:error('register cannot be AT in this pseudo-instruction')
|
|
end
|
|
|
|
args.rt = 'AT'
|
|
self:format_out(slti, args)
|
|
|
|
args.rs = 'AT'
|
|
args.rt = 'R0'
|
|
self:format_out(branch, args)
|
|
end
|
|
overrides.BGEI = overrides.BLTI
|
|
|
|
function overrides.BLEI(self, name)
|
|
-- TODO: this can probably be optimized
|
|
local addiu = instructions['ADDIU']
|
|
local slt = instructions['SLT']
|
|
local branch = instructions[branch_basics[name]]
|
|
local beq = instructions['BEQ']
|
|
local args = {}
|
|
local reg = self:register()
|
|
self:optional_comma()
|
|
args.immediate = self:const()
|
|
self:optional_comma()
|
|
local offset = {'SIGNED', self:const('relative')}
|
|
|
|
if reg == 'AT' then
|
|
self:error('register cannot be AT in this pseudo-instruction')
|
|
end
|
|
|
|
args.rt = 'AT'
|
|
args.rs = 'R0'
|
|
self:format_out(addiu, args)
|
|
|
|
if name == 'BLEI' then
|
|
args.offset = offset
|
|
else
|
|
args.offset = 2 -- branch to delay slot of the next branch
|
|
end
|
|
args.rs = reg
|
|
self:format_out(beq, args)
|
|
|
|
args.rd = 'AT'
|
|
self:format_out(slt, args)
|
|
|
|
args.rs = 'AT'
|
|
args.rt = 'R0'
|
|
args.offset = offset
|
|
self:format_out(branch, args)
|
|
end
|
|
overrides.BGTI = overrides.BLEI
|
|
|
|
function Parser:instruction()
|
|
local name = self.tok
|
|
local h = instructions[name]
|
|
self:advance()
|
|
|
|
-- FIXME: errors thrown here probably have the wrong line number (+1)
|
|
|
|
if h == nil then
|
|
self:error('undefined instruction')
|
|
elseif overrides[name] then
|
|
overrides[name](self, name)
|
|
elseif h[2] == 'tob' then -- or h[2] == 'Tob' then
|
|
local lui = instructions['LUI']
|
|
local args = {}
|
|
args.rt = self:register()
|
|
self:optional_comma()
|
|
local o = self:const()
|
|
local is_label = o[1] == 'LABELSYM'
|
|
if self:is_EOL() then
|
|
local lui_args = {}
|
|
lui_args.immediate = {'UPPEROFF', o}
|
|
lui_args.rt = 'AT'
|
|
self:format_out(lui, lui_args)
|
|
args.offset = {'LOWER', o}
|
|
args.base = 'AT'
|
|
else
|
|
if is_label then
|
|
self:error('labels cannot be used as offsets')
|
|
end
|
|
args.offset = {'SIGNED', o}
|
|
self:optional_comma()
|
|
args.base = self:deref()
|
|
end
|
|
self:format_out(h, args)
|
|
elseif h[2] ~= nil then
|
|
args = self:format_in(h[2])
|
|
self:format_out(h, args)
|
|
else
|
|
self:error('unimplemented instruction')
|
|
end
|
|
self:expect_EOL()
|
|
end
|
|
|
|
function Parser:tokenize(asm)
|
|
self.tokens = {}
|
|
self.i = 0
|
|
|
|
local routine = coroutine.create(function()
|
|
local lexer = Lexer(asm, self.main_fn, self.options)
|
|
lexer:lex(coroutine.yield)
|
|
end)
|
|
|
|
local function lex()
|
|
local t = {}
|
|
local ok, a, b, c, d = coroutine.resume(routine)
|
|
if not ok then
|
|
a = a or 'Internal Error: lexer coroutine has stopped'
|
|
error(a)
|
|
end
|
|
t.tt = a
|
|
t.tok = b
|
|
t.fn = c
|
|
t.line = d
|
|
insert(self.tokens, t)
|
|
return t.tt, t.tok, t.fn, t.line
|
|
end
|
|
|
|
-- first pass: collect tokens, constants, and relative labels.
|
|
-- can't do more because instruction size can depend on a constant's size
|
|
-- and labels depend on instruction size.
|
|
-- note however, instruction size does not depend on label size.
|
|
-- this would cause a recursive problem to solve,
|
|
-- which is too much for our simple assembler.
|
|
local plus_labels = {} -- constructed forwards
|
|
local minus_labels = {} -- constructed backwards
|
|
while true do
|
|
local tt, tok, fn, line = lex()
|
|
self.fn = fn
|
|
self.line = line
|
|
if tt == 'DEF' then
|
|
local tt2, tok2 = lex()
|
|
if tt2 ~= 'NUM' then
|
|
self:error('expected number for define')
|
|
end
|
|
self.defines[tok] = tok2
|
|
elseif tt == 'RELLABEL' then
|
|
if tok == '+' then
|
|
insert(plus_labels, #self.tokens)
|
|
elseif tok == '-' then
|
|
insert(minus_labels, 1, #self.tokens)
|
|
else
|
|
error('Internal Error: unexpected token for relative label', 1)
|
|
end
|
|
elseif tt == 'EOL' then
|
|
-- noop
|
|
elseif tt == 'EOF' then
|
|
if fn == self.main_fn then
|
|
break
|
|
end
|
|
elseif tt == nil then
|
|
error('Internal Error: missing token', 1)
|
|
end
|
|
end
|
|
|
|
-- resolve defines and relative labels
|
|
for i, t in ipairs(self.tokens) do
|
|
self.fn = t.fn
|
|
self.line = t.line
|
|
if t.tt == 'DEFSYM' then
|
|
t.tt = 'NUM'
|
|
t.tok = self.defines[t.tok]
|
|
if t.tok == nil then
|
|
self:error('undefined define') -- uhhh nice wording
|
|
end
|
|
elseif t.tt == 'RELLABEL' then
|
|
t.tt = 'LABEL'
|
|
-- exploits the fact that user labels can't begin with a number
|
|
t.tok = tostring(i)
|
|
elseif t.tt == 'RELLABELSYM' then
|
|
t.tt = 'LABELSYM'
|
|
local rel = t.tok
|
|
local seen = 0
|
|
-- TODO: don't iterate over *every* label, just the ones nearby
|
|
if rel > 0 then
|
|
for _, label_i in ipairs(plus_labels) do
|
|
if label_i > i then
|
|
seen = seen + 1
|
|
if seen == rel then
|
|
t.tok = tostring(label_i)
|
|
break
|
|
end
|
|
end
|
|
end
|
|
else
|
|
for _, label_i in ipairs(minus_labels) do
|
|
if label_i < i then
|
|
seen = seen - 1
|
|
if seen == rel then
|
|
t.tok = tostring(label_i)
|
|
break
|
|
end
|
|
end
|
|
end
|
|
end
|
|
if seen ~= rel then
|
|
self:error('could not find appropriate relative label')
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
function Parser:parse(asm)
|
|
self:tokenize(asm)
|
|
self:advance()
|
|
while true do
|
|
if self.tt == 'EOF' then
|
|
if self.fn == self.main_fn then
|
|
break
|
|
end
|
|
self:advance()
|
|
elseif self.tt == 'EOL' then
|
|
-- empty line
|
|
self:advance()
|
|
elseif self.tt == 'DEF' then
|
|
self:advance()
|
|
self:advance()
|
|
elseif self.tt == 'DIR' then
|
|
self:directive()
|
|
elseif self.tt == 'LABEL' then
|
|
self.dumper:add_label(self.tok)
|
|
self:advance()
|
|
elseif self.tt == 'INSTR' then
|
|
self:instruction()
|
|
else
|
|
self:error('unexpected token (unknown instruction?)')
|
|
end
|
|
end
|
|
return self.dumper:dump()
|
|
end
|
|
|
|
function Dumper:error(msg)
|
|
error(format('%s:%d: Error: %s', self.fn, self.line, msg), 2)
|
|
end
|
|
|
|
function Dumper:advance(by)
|
|
self.pos = self.pos + by
|
|
end
|
|
|
|
function Dumper:push_instruction(t)
|
|
t.kind = 'instruction'
|
|
insert(self.commands, t)
|
|
self:advance(4)
|
|
end
|
|
|
|
function Dumper:add_instruction_j(line, o, T)
|
|
self:push_instruction{line=line, o, T}
|
|
end
|
|
|
|
function Dumper:add_instruction_i(line, o, s, t, i)
|
|
self:push_instruction{line=line, o, s, t, i}
|
|
end
|
|
|
|
function Dumper:add_instruction_r(line, o, s, t, d, f, c)
|
|
self:push_instruction{line=line, o, s, t, d, f, c}
|
|
end
|
|
|
|
function Dumper:add_label(name)
|
|
self.labels[name] = self.pos
|
|
end
|
|
|
|
function Dumper:add_bytes(line, ...)
|
|
local bs = {...}
|
|
local t
|
|
local use_last = self.lastcommand and self.lastcommand.kind == 'bytes'
|
|
if use_last then
|
|
t = self.lastcommand
|
|
else
|
|
t = {}
|
|
t.kind = 'bytes'
|
|
t.size = 0
|
|
end
|
|
t.line = line
|
|
for _, b in ipairs(bs) do
|
|
t.size = t.size + 1
|
|
t[t.size] = b
|
|
end
|
|
if not use_last then
|
|
insert(self.commands, t)
|
|
end
|
|
self:advance(t.size)
|
|
end
|
|
|
|
function Dumper:add_directive(line, name, a, b)
|
|
local t = {}
|
|
t.line = line
|
|
if name == 'BYTE' then
|
|
self:add_bytes(line, a % 0x100)
|
|
elseif name == 'HALFWORD' then
|
|
local b0 = bitrange(a, 0, 7)
|
|
local b1 = bitrange(a, 8, 15)
|
|
self:add_bytes(line, b1, b0)
|
|
elseif name == 'WORD' then
|
|
local b0 = bitrange(a, 0, 7)
|
|
local b1 = bitrange(a, 8, 15)
|
|
local b2 = bitrange(a, 16, 23)
|
|
local b3 = bitrange(a, 24, 31)
|
|
self:add_bytes(line, b3, b2, b1, b0)
|
|
elseif name == 'ORG' then
|
|
t.kind = 'goto'
|
|
t.addr = a
|
|
insert(self.commands, t)
|
|
self.pos = a % 0x80000000
|
|
self:advance(0)
|
|
elseif name == 'ALIGN' then
|
|
t.kind = 'ahead'
|
|
local align = a*2
|
|
if align == 0 then
|
|
align = 4
|
|
elseif align < 0 then
|
|
self:error('negative alignment')
|
|
end
|
|
local temp = self.pos + align - 1
|
|
t.skip = temp - (temp % align) - self.pos
|
|
t.fill = t.fill or 0
|
|
insert(self.commands, t)
|
|
self:advance(t.skip)
|
|
elseif name == 'SKIP' then
|
|
t.kind = 'ahead'
|
|
t.skip = a
|
|
t.fill = b
|
|
insert(self.commands, t)
|
|
self:advance(t.skip)
|
|
else
|
|
self:error('unimplemented directive')
|
|
end
|
|
end
|
|
|
|
function Dumper:desym(tok)
|
|
if type(tok[2]) == 'number' then
|
|
return tok[2]
|
|
elseif tok[1] == 'LABELSYM' then
|
|
local label = self.labels[tok[2]]
|
|
if label == nil then
|
|
self:error('undefined label')
|
|
end
|
|
return label
|
|
elseif tok[1] == 'LABELREL' then
|
|
local label = self.labels[tok[2]]
|
|
if label == nil then
|
|
self:error('undefined label')
|
|
end
|
|
label = label % 0x80000000
|
|
local pos = self.pos % 0x80000000
|
|
local rel = floor(label/4) - 1 - floor(pos/4)
|
|
if rel > 0x8000 or rel <= -0x8000 then
|
|
self:error('branch too far')
|
|
end
|
|
return rel % 0x10000
|
|
end
|
|
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] or fpu_registers[tok] or sys_registers[tok]
|
|
end
|
|
if type(tok) == 'table' then
|
|
if #tok ~= 2 then
|
|
self:error('invalid token')
|
|
end
|
|
if tok[1] == 'UPPER' then
|
|
local val = self:desym(tok[2])
|
|
return bitrange(val, 16, 31)
|
|
elseif tok[1] == 'LOWER' then
|
|
local val = self:desym(tok[2])
|
|
return bitrange(val, 0, 15)
|
|
elseif tok[1] == 'UPPEROFF' then
|
|
local val = self:desym(tok[2])
|
|
local upper = bitrange(val, 16, 31)
|
|
local lower = bitrange(val, 0, 15)
|
|
if lower >= 0x8000 then
|
|
-- accommodate for offsets being signed
|
|
upper = (upper + 1) % 0x10000
|
|
end
|
|
return upper
|
|
elseif tok[1] == 'SIGNED' then
|
|
local val = self:desym(tok[2])
|
|
if val >= 0x10000 or val < -0x8000 then
|
|
self:error('value out of range')
|
|
end
|
|
return val % 0x10000
|
|
elseif tok[1] == 'NEGATE' then
|
|
local val = -self:desym(tok[2])
|
|
if val >= 0x10000 or val < -0x8000 then
|
|
self:error('value out of range')
|
|
end
|
|
return val % 0x10000
|
|
elseif tok[1] == 'INDEX' then
|
|
local val = self:desym(tok[2]) % 0x80000000
|
|
val = floor(val/4)
|
|
return val
|
|
else
|
|
return self:desym(tok)
|
|
end
|
|
end
|
|
self:error('invalid value')
|
|
end
|
|
|
|
function Dumper:validate(n, bits)
|
|
local max = 2^bits
|
|
if n == nil then
|
|
self:error('value is nil')
|
|
end
|
|
if n > max or n < 0 then
|
|
self:error('value out of range')
|
|
end
|
|
end
|
|
|
|
function Dumper:valvar(tok, bits)
|
|
local val = self:toval(tok)
|
|
self:validate(val, bits)
|
|
return val
|
|
end
|
|
|
|
function Dumper:write(t)
|
|
for _, b in ipairs(t) do
|
|
local s = ('%02X'):format(b)
|
|
self.writer(self.pos, s)
|
|
self.pos = self.pos + 1
|
|
end
|
|
end
|
|
|
|
function Dumper:dump_instruction(t)
|
|
local uw = 0
|
|
local lw = 0
|
|
|
|
local o = t[1]
|
|
uw = uw + o*0x400
|
|
|
|
if #t == 2 then
|
|
local val = self:valvar(t[2], 26)
|
|
uw = uw + bitrange(val, 16, 25)
|
|
lw = lw + bitrange(val, 0, 15)
|
|
elseif #t == 4 then
|
|
uw = uw + self:valvar(t[2], 5)*0x20
|
|
uw = uw + self:valvar(t[3], 5)
|
|
lw = lw + self:valvar(t[4], 16)
|
|
elseif #t == 6 then
|
|
uw = uw + self:valvar(t[2], 5)*0x20
|
|
uw = uw + self:valvar(t[3], 5)
|
|
lw = lw + self:valvar(t[4], 5)*0x800
|
|
lw = lw + self:valvar(t[5], 5)*0x40
|
|
lw = lw + self:valvar(t[6], 6)
|
|
else
|
|
error('Internal Error: unknown n-size', 1)
|
|
end
|
|
|
|
return uw, lw
|
|
end
|
|
|
|
function Dumper:dump()
|
|
self.pos = self.options.offset or 0
|
|
for i, t in ipairs(self.commands) do
|
|
if t.line == nil then
|
|
error('Internal Error: no line number available')
|
|
end
|
|
self.line = t.line
|
|
if t.kind == 'instruction' then
|
|
uw, lw = self:dump_instruction(t)
|
|
local b0 = bitrange(lw, 0, 7)
|
|
local b1 = bitrange(lw, 8, 15)
|
|
local b2 = bitrange(uw, 0, 7)
|
|
local b3 = bitrange(uw, 8, 15)
|
|
self:write{b3, b2, b1, b0}
|
|
elseif t.kind == 'bytes' then
|
|
self:write(t)
|
|
elseif t.kind == 'goto' then
|
|
self.pos = t.addr
|
|
elseif t.kind == 'ahead' then
|
|
if t.fill then
|
|
for i=1, t.skip do
|
|
self:write{t.fill}
|
|
end
|
|
else
|
|
self.pos = self.pos + t.skip
|
|
end
|
|
else
|
|
error('Internal Error: unknown command', 1)
|
|
end
|
|
end
|
|
end
|
|
|
|
function assembler.word_writer()
|
|
local buff = {}
|
|
local max = -1
|
|
return function(pos, b)
|
|
if pos then
|
|
buff[pos] = b
|
|
if pos > max then
|
|
max = pos
|
|
end
|
|
else
|
|
if max == -1 then return end
|
|
for i=0, max, 4 do
|
|
local a = buff[i+0] or '00'
|
|
local b = buff[i+1] or '00'
|
|
local c = buff[i+2] or '00'
|
|
local d = buff[i+3] or '00'
|
|
print(a..b..c..d)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
function assembler.assemble(fn_or_asm, writer, options)
|
|
-- assemble MIPS R4300i assembly code.
|
|
-- if fn_or_asm contains a newline; treat as assembly, otherwise load file.
|
|
-- returns error message on error, or nil on success.
|
|
fn_or_asm = tostring(fn_or_asm)
|
|
local default_writer = not writer
|
|
writer = writer or assembler.word_writer()
|
|
options = options or {}
|
|
|
|
function main()
|
|
local fn = nil
|
|
local asm
|
|
if fn_or_asm:find('[\r\n]') then
|
|
asm = fn_or_asm
|
|
else
|
|
fn = fn_or_asm
|
|
asm = readfile(fn)
|
|
options.path = fn:match(".*/")
|
|
end
|
|
|
|
local parser = Parser(writer, fn, options)
|
|
parser:parse(asm)
|
|
|
|
if default_writer then
|
|
writer()
|
|
end
|
|
end
|
|
|
|
if options.unsafe then
|
|
return main()
|
|
else
|
|
local ok, err = pcall(main)
|
|
return err
|
|
end
|
|
end
|
|
|
|
return setmetatable(assembler, {
|
|
__call = function(self, ...)
|
|
return self.assemble(...)
|
|
end,
|
|
})
|