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dasm_mips.lua
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------------------------------------------------------------------------------
-- DynASM MIPS32/MIPS64 module.
--
-- Copyright (C) 2005-2023 Mike Pall. All rights reserved.
-- See dynasm.lua for full copyright notice.
------------------------------------------------------------------------------
local mips64 = mips64
local mipsr6 = _map_def.MIPSR6
-- Module information:
local _info = {
arch = mips64 and "mips64" or "mips",
description = "DynASM MIPS32/MIPS64 module",
version = "1.5.0",
vernum = 10500,
release = "2021-05-02",
author = "Mike Pall",
license = "MIT",
}
-- Exported glue functions for the arch-specific module.
local _M = { _info = _info }
-- Cache library functions.
local type, tonumber, pairs, ipairs = type, tonumber, pairs, ipairs
local assert, setmetatable = assert, setmetatable
local _s = string
local sub, format, byte, char = _s.sub, _s.format, _s.byte, _s.char
local match, gmatch = _s.match, _s.gmatch
local concat, sort = table.concat, table.sort
local bit = bit or require("bit")
local band, shl, shr, sar = bit.band, bit.lshift, bit.rshift, bit.arshift
local tohex = bit.tohex
-- Inherited tables and callbacks.
local g_opt, g_arch
local wline, werror, wfatal, wwarn
-- Action name list.
-- CHECK: Keep this in sync with the C code!
local action_names = {
"STOP", "SECTION", "ESC", "REL_EXT",
"ALIGN", "REL_LG", "LABEL_LG",
"REL_PC", "LABEL_PC", "IMM", "IMMS",
}
-- Maximum number of section buffer positions for dasm_put().
-- CHECK: Keep this in sync with the C code!
local maxsecpos = 25 -- Keep this low, to avoid excessively long C lines.
-- Action name -> action number.
local map_action = {}
for n,name in ipairs(action_names) do
map_action[name] = n-1
end
-- Action list buffer.
local actlist = {}
-- Argument list for next dasm_put(). Start with offset 0 into action list.
local actargs = { 0 }
-- Current number of section buffer positions for dasm_put().
local secpos = 1
------------------------------------------------------------------------------
-- Dump action names and numbers.
local function dumpactions(out)
out:write("DynASM encoding engine action codes:\n")
for n,name in ipairs(action_names) do
local num = map_action[name]
out:write(format(" %-10s %02X %d\n", name, num, num))
end
out:write("\n")
end
-- Write action list buffer as a huge static C array.
local function writeactions(out, name)
local nn = #actlist
if nn == 0 then nn = 1; actlist[0] = map_action.STOP end
out:write("static const unsigned int ", name, "[", nn, "] = {\n")
for i = 1,nn-1 do
assert(out:write("0x", tohex(actlist[i]), ",\n"))
end
assert(out:write("0x", tohex(actlist[nn]), "\n};\n\n"))
end
------------------------------------------------------------------------------
-- Add word to action list.
local function wputxw(n)
assert(n >= 0 and n <= 0xffffffff and n % 1 == 0, "word out of range")
actlist[#actlist+1] = n
end
-- Add action to list with optional arg. Advance buffer pos, too.
local function waction(action, val, a, num)
local w = assert(map_action[action], "bad action name `"..action.."'")
wputxw(0xff000000 + w * 0x10000 + (val or 0))
if a then actargs[#actargs+1] = a end
if a or num then secpos = secpos + (num or 1) end
end
-- Flush action list (intervening C code or buffer pos overflow).
local function wflush(term)
if #actlist == actargs[1] then return end -- Nothing to flush.
if not term then waction("STOP") end -- Terminate action list.
wline(format("dasm_put(Dst, %s);", concat(actargs, ", ")), true)
actargs = { #actlist } -- Actionlist offset is 1st arg to next dasm_put().
secpos = 1 -- The actionlist offset occupies a buffer position, too.
end
-- Put escaped word.
local function wputw(n)
if n >= 0xff000000 then waction("ESC") end
wputxw(n)
end
-- Reserve position for word.
local function wpos()
local pos = #actlist+1
actlist[pos] = ""
return pos
end
-- Store word to reserved position.
local function wputpos(pos, n)
assert(n >= 0 and n <= 0xffffffff and n % 1 == 0, "word out of range")
actlist[pos] = n
end
------------------------------------------------------------------------------
-- Global label name -> global label number. With auto assignment on 1st use.
local next_global = 20
local map_global = setmetatable({}, { __index = function(t, name)
if not match(name, "^[%a_][%w_]*$") then werror("bad global label") end
local n = next_global
if n > 2047 then werror("too many global labels") end
next_global = n + 1
t[name] = n
return n
end})
-- Dump global labels.
local function dumpglobals(out, lvl)
local t = {}
for name, n in pairs(map_global) do t[n] = name end
out:write("Global labels:\n")
for i=20,next_global-1 do
out:write(format(" %s\n", t[i]))
end
out:write("\n")
end
-- Write global label enum.
local function writeglobals(out, prefix)
local t = {}
for name, n in pairs(map_global) do t[n] = name end
out:write("enum {\n")
for i=20,next_global-1 do
out:write(" ", prefix, t[i], ",\n")
end
out:write(" ", prefix, "_MAX\n};\n")
end
-- Write global label names.
local function writeglobalnames(out, name)
local t = {}
for name, n in pairs(map_global) do t[n] = name end
out:write("static const char *const ", name, "[] = {\n")
for i=20,next_global-1 do
out:write(" \"", t[i], "\",\n")
end
out:write(" (const char *)0\n};\n")
end
------------------------------------------------------------------------------
-- Extern label name -> extern label number. With auto assignment on 1st use.
local next_extern = 0
local map_extern_ = {}
local map_extern = setmetatable({}, { __index = function(t, name)
-- No restrictions on the name for now.
local n = next_extern
if n > 2047 then werror("too many extern labels") end
next_extern = n + 1
t[name] = n
map_extern_[n] = name
return n
end})
-- Dump extern labels.
local function dumpexterns(out, lvl)
out:write("Extern labels:\n")
for i=0,next_extern-1 do
out:write(format(" %s\n", map_extern_[i]))
end
out:write("\n")
end
-- Write extern label names.
local function writeexternnames(out, name)
out:write("static const char *const ", name, "[] = {\n")
for i=0,next_extern-1 do
out:write(" \"", map_extern_[i], "\",\n")
end
out:write(" (const char *)0\n};\n")
end
------------------------------------------------------------------------------
-- Arch-specific maps.
local map_archdef = { sp="r29", ra="r31" } -- Ext. register name -> int. name.
local map_type = {} -- Type name -> { ctype, reg }
local ctypenum = 0 -- Type number (for Dt... macros).
-- Reverse defines for registers.
function _M.revdef(s)
if s == "r29" then return "sp"
elseif s == "r31" then return "ra" end
return s
end
------------------------------------------------------------------------------
-- Template strings for MIPS instructions.
local map_op = {
-- First-level opcodes.
j_1 = "08000000J",
jal_1 = "0c000000J",
b_1 = "10000000B",
beqz_2 = "10000000SB",
beq_3 = "10000000STB",
bnez_2 = "14000000SB",
bne_3 = "14000000STB",
blez_2 = "18000000SB",
bgtz_2 = "1c000000SB",
li_2 = "24000000TI",
addiu_3 = "24000000TSI",
slti_3 = "28000000TSI",
sltiu_3 = "2c000000TSI",
andi_3 = "30000000TSU",
lu_2 = "34000000TU",
ori_3 = "34000000TSU",
xori_3 = "38000000TSU",
lui_2 = "3c000000TU",
daddiu_3 = mips64 and "64000000TSI",
ldl_2 = mips64 and "68000000TO",
ldr_2 = mips64 and "6c000000TO",
lb_2 = "80000000TO",
lh_2 = "84000000TO",
lw_2 = "8c000000TO",
lbu_2 = "90000000TO",
lhu_2 = "94000000TO",
lwu_2 = mips64 and "9c000000TO",
sb_2 = "a0000000TO",
sh_2 = "a4000000TO",
sw_2 = "ac000000TO",
lwc1_2 = "c4000000HO",
ldc1_2 = "d4000000HO",
ld_2 = mips64 and "dc000000TO",
swc1_2 = "e4000000HO",
sdc1_2 = "f4000000HO",
sd_2 = mips64 and "fc000000TO",
-- Opcode SPECIAL.
nop_0 = "00000000",
sll_3 = "00000000DTA",
sextw_2 = "00000000DT",
srl_3 = "00000002DTA",
rotr_3 = "00200002DTA",
sra_3 = "00000003DTA",
sllv_3 = "00000004DTS",
srlv_3 = "00000006DTS",
rotrv_3 = "00000046DTS",
drotrv_3 = mips64 and "00000056DTS",
srav_3 = "00000007DTS",
jalr_1 = "0000f809S",
jalr_2 = "00000009DS",
syscall_0 = "0000000c",
syscall_1 = "0000000cY",
break_0 = "0000000d",
break_1 = "0000000dY",
sync_0 = "0000000f",
dsllv_3 = mips64 and "00000014DTS",
dsrlv_3 = mips64 and "00000016DTS",
dsrav_3 = mips64 and "00000017DTS",
add_3 = "00000020DST",
move_2 = mips64 and "00000025DS" or "00000021DS",
addu_3 = "00000021DST",
sub_3 = "00000022DST",
negu_2 = mips64 and "0000002fDT" or "00000023DT",
subu_3 = "00000023DST",
and_3 = "00000024DST",
or_3 = "00000025DST",
xor_3 = "00000026DST",
not_2 = "00000027DS",
nor_3 = "00000027DST",
slt_3 = "0000002aDST",
sltu_3 = "0000002bDST",
dadd_3 = mips64 and "0000002cDST",
daddu_3 = mips64 and "0000002dDST",
dsub_3 = mips64 and "0000002eDST",
dsubu_3 = mips64 and "0000002fDST",
tge_2 = "00000030ST",
tge_3 = "00000030STZ",
tgeu_2 = "00000031ST",
tgeu_3 = "00000031STZ",
tlt_2 = "00000032ST",
tlt_3 = "00000032STZ",
tltu_2 = "00000033ST",
tltu_3 = "00000033STZ",
teq_2 = "00000034ST",
teq_3 = "00000034STZ",
tne_2 = "00000036ST",
tne_3 = "00000036STZ",
dsll_3 = mips64 and "00000038DTa",
dsrl_3 = mips64 and "0000003aDTa",
drotr_3 = mips64 and "0020003aDTa",
dsra_3 = mips64 and "0000003bDTa",
dsll32_3 = mips64 and "0000003cDTA",
dsrl32_3 = mips64 and "0000003eDTA",
drotr32_3 = mips64 and "0020003eDTA",
dsra32_3 = mips64 and "0000003fDTA",
-- Opcode REGIMM.
bltz_2 = "04000000SB",
bgez_2 = "04010000SB",
bltzl_2 = "04020000SB",
bgezl_2 = "04030000SB",
bal_1 = "04110000B",
synci_1 = "041f0000O",
-- Opcode SPECIAL3.
ext_4 = "7c000000TSAM", -- Note: last arg is msbd = size-1
dextm_4 = mips64 and "7c000001TSAM", -- Args: pos | size-1-32
dextu_4 = mips64 and "7c000002TSAM", -- Args: pos-32 | size-1
dext_4 = mips64 and "7c000003TSAM", -- Args: pos | size-1
zextw_2 = mips64 and "7c00f803TS",
ins_4 = "7c000004TSAM", -- Note: last arg is msb = pos+size-1
dinsm_4 = mips64 and "7c000005TSAM", -- Args: pos | pos+size-33
dinsu_4 = mips64 and "7c000006TSAM", -- Args: pos-32 | pos+size-33
dins_4 = mips64 and "7c000007TSAM", -- Args: pos | pos+size-1
wsbh_2 = "7c0000a0DT",
dsbh_2 = mips64 and "7c0000a4DT",
dshd_2 = mips64 and "7c000164DT",
seb_2 = "7c000420DT",
seh_2 = "7c000620DT",
rdhwr_2 = "7c00003bTD",
-- Opcode COP0.
mfc0_2 = "40000000TD",
mfc0_3 = "40000000TDW",
dmfc0_2 = mips64 and "40200000TD",
dmfc0_3 = mips64 and "40200000TDW",
mtc0_2 = "40800000TD",
mtc0_3 = "40800000TDW",
dmtc0_2 = mips64 and "40a00000TD",
dmtc0_3 = mips64 and "40a00000TDW",
rdpgpr_2 = "41400000DT",
di_0 = "41606000",
di_1 = "41606000T",
ei_0 = "41606020",
ei_1 = "41606020T",
wrpgpr_2 = "41c00000DT",
tlbr_0 = "42000001",
tlbwi_0 = "42000002",
tlbwr_0 = "42000006",
tlbp_0 = "42000008",
eret_0 = "42000018",
deret_0 = "4200001f",
wait_0 = "42000020",
-- Opcode COP1.
mfc1_2 = "44000000TG",
dmfc1_2 = mips64 and "44200000TG",
cfc1_2 = "44400000TG",
mfhc1_2 = "44600000TG",
mtc1_2 = "44800000TG",
dmtc1_2 = mips64 and "44a00000TG",
ctc1_2 = "44c00000TG",
mthc1_2 = "44e00000TG",
["add.s_3"] = "46000000FGH",
["sub.s_3"] = "46000001FGH",
["mul.s_3"] = "46000002FGH",
["div.s_3"] = "46000003FGH",
["sqrt.s_2"] = "46000004FG",
["abs.s_2"] = "46000005FG",
["mov.s_2"] = "46000006FG",
["neg.s_2"] = "46000007FG",
["round.l.s_2"] = "46000008FG",
["trunc.l.s_2"] = "46000009FG",
["ceil.l.s_2"] = "4600000aFG",
["floor.l.s_2"] = "4600000bFG",
["round.w.s_2"] = "4600000cFG",
["trunc.w.s_2"] = "4600000dFG",
["ceil.w.s_2"] = "4600000eFG",
["floor.w.s_2"] = "4600000fFG",
["recip.s_2"] = "46000015FG",
["rsqrt.s_2"] = "46000016FG",
["cvt.d.s_2"] = "46000021FG",
["cvt.w.s_2"] = "46000024FG",
["cvt.l.s_2"] = "46000025FG",
["add.d_3"] = "46200000FGH",
["sub.d_3"] = "46200001FGH",
["mul.d_3"] = "46200002FGH",
["div.d_3"] = "46200003FGH",
["sqrt.d_2"] = "46200004FG",
["abs.d_2"] = "46200005FG",
["mov.d_2"] = "46200006FG",
["neg.d_2"] = "46200007FG",
["round.l.d_2"] = "46200008FG",
["trunc.l.d_2"] = "46200009FG",
["ceil.l.d_2"] = "4620000aFG",
["floor.l.d_2"] = "4620000bFG",
["round.w.d_2"] = "4620000cFG",
["trunc.w.d_2"] = "4620000dFG",
["ceil.w.d_2"] = "4620000eFG",
["floor.w.d_2"] = "4620000fFG",
["recip.d_2"] = "46200015FG",
["rsqrt.d_2"] = "46200016FG",
["cvt.s.d_2"] = "46200020FG",
["cvt.w.d_2"] = "46200024FG",
["cvt.l.d_2"] = "46200025FG",
["cvt.s.w_2"] = "46800020FG",
["cvt.d.w_2"] = "46800021FG",
["cvt.s.l_2"] = "46a00020FG",
["cvt.d.l_2"] = "46a00021FG",
}
if mipsr6 then -- Instructions added with MIPSR6.
for k,v in pairs({
-- Add immediate to upper bits.
aui_3 = "3c000000TSI",
daui_3 = mips64 and "74000000TSI",
dahi_2 = mips64 and "04060000SI",
dati_2 = mips64 and "041e0000SI",
-- TODO: addiupc, auipc, aluipc, lwpc, lwupc, ldpc.
-- Compact branches.
blezalc_2 = "18000000TB", -- rt != 0.
bgezalc_2 = "18000000T=SB", -- rt != 0.
bgtzalc_2 = "1c000000TB", -- rt != 0.
bltzalc_2 = "1c000000T=SB", -- rt != 0.
blezc_2 = "58000000TB", -- rt != 0.
bgezc_2 = "58000000T=SB", -- rt != 0.
bgec_3 = "58000000STB", -- rs != rt.
blec_3 = "58000000TSB", -- rt != rs.
bgtzc_2 = "5c000000TB", -- rt != 0.
bltzc_2 = "5c000000T=SB", -- rt != 0.
bltc_3 = "5c000000STB", -- rs != rt.
bgtc_3 = "5c000000TSB", -- rt != rs.
bgeuc_3 = "18000000STB", -- rs != rt.
bleuc_3 = "18000000TSB", -- rt != rs.
bltuc_3 = "1c000000STB", -- rs != rt.
bgtuc_3 = "1c000000TSB", -- rt != rs.
beqzalc_2 = "20000000TB", -- rt != 0.
bnezalc_2 = "60000000TB", -- rt != 0.
beqc_3 = "20000000STB", -- rs < rt.
bnec_3 = "60000000STB", -- rs < rt.
bovc_3 = "20000000STB", -- rs >= rt.
bnvc_3 = "60000000STB", -- rs >= rt.
beqzc_2 = "d8000000SK", -- rs != 0.
bnezc_2 = "f8000000SK", -- rs != 0.
jic_2 = "d8000000TI",
jialc_2 = "f8000000TI",
bc_1 = "c8000000L",
balc_1 = "e8000000L",
-- Opcode SPECIAL.
jr_1 = "00000009S",
sdbbp_0 = "0000000e",
sdbbp_1 = "0000000eY",
lsa_4 = "00000005DSTA",
dlsa_4 = mips64 and "00000015DSTA",
seleqz_3 = "00000035DST",
selnez_3 = "00000037DST",
clz_2 = "00000050DS",
clo_2 = "00000051DS",
dclz_2 = mips64 and "00000052DS",
dclo_2 = mips64 and "00000053DS",
mul_3 = "00000098DST",
muh_3 = "000000d8DST",
mulu_3 = "00000099DST",
muhu_3 = "000000d9DST",
div_3 = "0000009aDST",
mod_3 = "000000daDST",
divu_3 = "0000009bDST",
modu_3 = "000000dbDST",
dmul_3 = mips64 and "0000009cDST",
dmuh_3 = mips64 and "000000dcDST",
dmulu_3 = mips64 and "0000009dDST",
dmuhu_3 = mips64 and "000000ddDST",
ddiv_3 = mips64 and "0000009eDST",
dmod_3 = mips64 and "000000deDST",
ddivu_3 = mips64 and "0000009fDST",
dmodu_3 = mips64 and "000000dfDST",
-- Opcode SPECIAL3.
align_4 = "7c000220DSTA",
dalign_4 = mips64 and "7c000224DSTA",
bitswap_2 = "7c000020DT",
dbitswap_2 = mips64 and "7c000024DT",
-- Opcode COP1.
bc1eqz_2 = "45200000HB",
bc1nez_2 = "45a00000HB",
["sel.s_3"] = "46000010FGH",
["seleqz.s_3"] = "46000014FGH",
["selnez.s_3"] = "46000017FGH",
["maddf.s_3"] = "46000018FGH",
["msubf.s_3"] = "46000019FGH",
["rint.s_2"] = "4600001aFG",
["class.s_2"] = "4600001bFG",
["min.s_3"] = "4600001cFGH",
["mina.s_3"] = "4600001dFGH",
["max.s_3"] = "4600001eFGH",
["maxa.s_3"] = "4600001fFGH",
["cmp.af.s_3"] = "46800000FGH",
["cmp.un.s_3"] = "46800001FGH",
["cmp.or.s_3"] = "46800011FGH",
["cmp.eq.s_3"] = "46800002FGH",
["cmp.une.s_3"] = "46800012FGH",
["cmp.ueq.s_3"] = "46800003FGH",
["cmp.ne.s_3"] = "46800013FGH",
["cmp.lt.s_3"] = "46800004FGH",
["cmp.ult.s_3"] = "46800005FGH",
["cmp.le.s_3"] = "46800006FGH",
["cmp.ule.s_3"] = "46800007FGH",
["cmp.saf.s_3"] = "46800008FGH",
["cmp.sun.s_3"] = "46800009FGH",
["cmp.sor.s_3"] = "46800019FGH",
["cmp.seq.s_3"] = "4680000aFGH",
["cmp.sune.s_3"] = "4680001aFGH",
["cmp.sueq.s_3"] = "4680000bFGH",
["cmp.sne.s_3"] = "4680001bFGH",
["cmp.slt.s_3"] = "4680000cFGH",
["cmp.sult.s_3"] = "4680000dFGH",
["cmp.sle.s_3"] = "4680000eFGH",
["cmp.sule.s_3"] = "4680000fFGH",
["sel.d_3"] = "46200010FGH",
["seleqz.d_3"] = "46200014FGH",
["selnez.d_3"] = "46200017FGH",
["maddf.d_3"] = "46200018FGH",
["msubf.d_3"] = "46200019FGH",
["rint.d_2"] = "4620001aFG",
["class.d_2"] = "4620001bFG",
["min.d_3"] = "4620001cFGH",
["mina.d_3"] = "4620001dFGH",
["max.d_3"] = "4620001eFGH",
["maxa.d_3"] = "4620001fFGH",
["cmp.af.d_3"] = "46a00000FGH",
["cmp.un.d_3"] = "46a00001FGH",
["cmp.or.d_3"] = "46a00011FGH",
["cmp.eq.d_3"] = "46a00002FGH",
["cmp.une.d_3"] = "46a00012FGH",
["cmp.ueq.d_3"] = "46a00003FGH",
["cmp.ne.d_3"] = "46a00013FGH",
["cmp.lt.d_3"] = "46a00004FGH",
["cmp.ult.d_3"] = "46a00005FGH",
["cmp.le.d_3"] = "46a00006FGH",
["cmp.ule.d_3"] = "46a00007FGH",
["cmp.saf.d_3"] = "46a00008FGH",
["cmp.sun.d_3"] = "46a00009FGH",
["cmp.sor.d_3"] = "46a00019FGH",
["cmp.seq.d_3"] = "46a0000aFGH",
["cmp.sune.d_3"] = "46a0001aFGH",
["cmp.sueq.d_3"] = "46a0000bFGH",
["cmp.sne.d_3"] = "46a0001bFGH",
["cmp.slt.d_3"] = "46a0000cFGH",
["cmp.sult.d_3"] = "46a0000dFGH",
["cmp.sle.d_3"] = "46a0000eFGH",
["cmp.sule.d_3"] = "46a0000fFGH",
}) do map_op[k] = v end
else -- Instructions removed by MIPSR6.
for k,v in pairs({
-- Traps, don't use.
addi_3 = "20000000TSI",
daddi_3 = mips64 and "60000000TSI",
-- Branch on likely, don't use.
beqzl_2 = "50000000SB",
beql_3 = "50000000STB",
bnezl_2 = "54000000SB",
bnel_3 = "54000000STB",
blezl_2 = "58000000SB",
bgtzl_2 = "5c000000SB",
lwl_2 = "88000000TO",
lwr_2 = "98000000TO",
swl_2 = "a8000000TO",
sdl_2 = mips64 and "b0000000TO",
sdr_2 = mips64 and "b1000000TO",
swr_2 = "b8000000TO",
cache_2 = "bc000000NO",
ll_2 = "c0000000TO",
pref_2 = "cc000000NO",
sc_2 = "e0000000TO",
scd_2 = mips64 and "f0000000TO",
-- Opcode SPECIAL.
movf_2 = "00000001DS",
movf_3 = "00000001DSC",
movt_2 = "00010001DS",
movt_3 = "00010001DSC",
jr_1 = "00000008S",
movz_3 = "0000000aDST",
movn_3 = "0000000bDST",
mfhi_1 = "00000010D",
mthi_1 = "00000011S",
mflo_1 = "00000012D",
mtlo_1 = "00000013S",
mult_2 = "00000018ST",
multu_2 = "00000019ST",
div_3 = "0000001aST",
divu_3 = "0000001bST",
ddiv_3 = mips64 and "0000001eST",
ddivu_3 = mips64 and "0000001fST",
dmult_2 = mips64 and "0000001cST",
dmultu_2 = mips64 and "0000001dST",
-- Opcode REGIMM.
tgei_2 = "04080000SI",
tgeiu_2 = "04090000SI",
tlti_2 = "040a0000SI",
tltiu_2 = "040b0000SI",
teqi_2 = "040c0000SI",
tnei_2 = "040e0000SI",
bltzal_2 = "04100000SB",
bgezal_2 = "04110000SB",
bltzall_2 = "04120000SB",
bgezall_2 = "04130000SB",
-- Opcode SPECIAL2.
madd_2 = "70000000ST",
maddu_2 = "70000001ST",
mul_3 = "70000002DST",
msub_2 = "70000004ST",
msubu_2 = "70000005ST",
clz_2 = "70000020D=TS",
clo_2 = "70000021D=TS",
dclz_2 = mips64 and "70000024D=TS",
dclo_2 = mips64 and "70000025D=TS",
sdbbp_0 = "7000003f",
sdbbp_1 = "7000003fY",
-- Opcode COP1.
bc1f_1 = "45000000B",
bc1f_2 = "45000000CB",
bc1t_1 = "45010000B",
bc1t_2 = "45010000CB",
bc1fl_1 = "45020000B",
bc1fl_2 = "45020000CB",
bc1tl_1 = "45030000B",
bc1tl_2 = "45030000CB",
["movf.s_2"] = "46000011FG",
["movf.s_3"] = "46000011FGC",
["movt.s_2"] = "46010011FG",
["movt.s_3"] = "46010011FGC",
["movz.s_3"] = "46000012FGT",
["movn.s_3"] = "46000013FGT",
["cvt.ps.s_3"] = "46000026FGH",
["c.f.s_2"] = "46000030GH",
["c.f.s_3"] = "46000030VGH",
["c.un.s_2"] = "46000031GH",
["c.un.s_3"] = "46000031VGH",
["c.eq.s_2"] = "46000032GH",
["c.eq.s_3"] = "46000032VGH",
["c.ueq.s_2"] = "46000033GH",
["c.ueq.s_3"] = "46000033VGH",
["c.olt.s_2"] = "46000034GH",
["c.olt.s_3"] = "46000034VGH",
["c.ult.s_2"] = "46000035GH",
["c.ult.s_3"] = "46000035VGH",
["c.ole.s_2"] = "46000036GH",
["c.ole.s_3"] = "46000036VGH",
["c.ule.s_2"] = "46000037GH",
["c.ule.s_3"] = "46000037VGH",
["c.sf.s_2"] = "46000038GH",
["c.sf.s_3"] = "46000038VGH",
["c.ngle.s_2"] = "46000039GH",
["c.ngle.s_3"] = "46000039VGH",
["c.seq.s_2"] = "4600003aGH",
["c.seq.s_3"] = "4600003aVGH",
["c.ngl.s_2"] = "4600003bGH",
["c.ngl.s_3"] = "4600003bVGH",
["c.lt.s_2"] = "4600003cGH",
["c.lt.s_3"] = "4600003cVGH",
["c.nge.s_2"] = "4600003dGH",
["c.nge.s_3"] = "4600003dVGH",
["c.le.s_2"] = "4600003eGH",
["c.le.s_3"] = "4600003eVGH",
["c.ngt.s_2"] = "4600003fGH",
["c.ngt.s_3"] = "4600003fVGH",
["movf.d_2"] = "46200011FG",
["movf.d_3"] = "46200011FGC",
["movt.d_2"] = "46210011FG",
["movt.d_3"] = "46210011FGC",
["movz.d_3"] = "46200012FGT",
["movn.d_3"] = "46200013FGT",
["c.f.d_2"] = "46200030GH",
["c.f.d_3"] = "46200030VGH",
["c.un.d_2"] = "46200031GH",
["c.un.d_3"] = "46200031VGH",
["c.eq.d_2"] = "46200032GH",
["c.eq.d_3"] = "46200032VGH",
["c.ueq.d_2"] = "46200033GH",
["c.ueq.d_3"] = "46200033VGH",
["c.olt.d_2"] = "46200034GH",
["c.olt.d_3"] = "46200034VGH",
["c.ult.d_2"] = "46200035GH",
["c.ult.d_3"] = "46200035VGH",
["c.ole.d_2"] = "46200036GH",
["c.ole.d_3"] = "46200036VGH",
["c.ule.d_2"] = "46200037GH",
["c.ule.d_3"] = "46200037VGH",
["c.sf.d_2"] = "46200038GH",
["c.sf.d_3"] = "46200038VGH",
["c.ngle.d_2"] = "46200039GH",
["c.ngle.d_3"] = "46200039VGH",
["c.seq.d_2"] = "4620003aGH",
["c.seq.d_3"] = "4620003aVGH",
["c.ngl.d_2"] = "4620003bGH",
["c.ngl.d_3"] = "4620003bVGH",
["c.lt.d_2"] = "4620003cGH",
["c.lt.d_3"] = "4620003cVGH",
["c.nge.d_2"] = "4620003dGH",
["c.nge.d_3"] = "4620003dVGH",
["c.le.d_2"] = "4620003eGH",
["c.le.d_3"] = "4620003eVGH",
["c.ngt.d_2"] = "4620003fGH",
["c.ngt.d_3"] = "4620003fVGH",
["add.ps_3"] = "46c00000FGH",
["sub.ps_3"] = "46c00001FGH",
["mul.ps_3"] = "46c00002FGH",
["abs.ps_2"] = "46c00005FG",
["mov.ps_2"] = "46c00006FG",
["neg.ps_2"] = "46c00007FG",
["movf.ps_2"] = "46c00011FG",
["movf.ps_3"] = "46c00011FGC",
["movt.ps_2"] = "46c10011FG",
["movt.ps_3"] = "46c10011FGC",
["movz.ps_3"] = "46c00012FGT",
["movn.ps_3"] = "46c00013FGT",
["cvt.s.pu_2"] = "46c00020FG",
["cvt.s.pl_2"] = "46c00028FG",
["pll.ps_3"] = "46c0002cFGH",
["plu.ps_3"] = "46c0002dFGH",
["pul.ps_3"] = "46c0002eFGH",
["puu.ps_3"] = "46c0002fFGH",
["c.f.ps_2"] = "46c00030GH",
["c.f.ps_3"] = "46c00030VGH",
["c.un.ps_2"] = "46c00031GH",
["c.un.ps_3"] = "46c00031VGH",
["c.eq.ps_2"] = "46c00032GH",
["c.eq.ps_3"] = "46c00032VGH",
["c.ueq.ps_2"] = "46c00033GH",
["c.ueq.ps_3"] = "46c00033VGH",
["c.olt.ps_2"] = "46c00034GH",
["c.olt.ps_3"] = "46c00034VGH",
["c.ult.ps_2"] = "46c00035GH",
["c.ult.ps_3"] = "46c00035VGH",
["c.ole.ps_2"] = "46c00036GH",
["c.ole.ps_3"] = "46c00036VGH",
["c.ule.ps_2"] = "46c00037GH",
["c.ule.ps_3"] = "46c00037VGH",
["c.sf.ps_2"] = "46c00038GH",
["c.sf.ps_3"] = "46c00038VGH",
["c.ngle.ps_2"] = "46c00039GH",
["c.ngle.ps_3"] = "46c00039VGH",
["c.seq.ps_2"] = "46c0003aGH",
["c.seq.ps_3"] = "46c0003aVGH",
["c.ngl.ps_2"] = "46c0003bGH",
["c.ngl.ps_3"] = "46c0003bVGH",
["c.lt.ps_2"] = "46c0003cGH",
["c.lt.ps_3"] = "46c0003cVGH",
["c.nge.ps_2"] = "46c0003dGH",
["c.nge.ps_3"] = "46c0003dVGH",
["c.le.ps_2"] = "46c0003eGH",
["c.le.ps_3"] = "46c0003eVGH",
["c.ngt.ps_2"] = "46c0003fGH",
["c.ngt.ps_3"] = "46c0003fVGH",
-- Opcode COP1X.
lwxc1_2 = "4c000000FX",
ldxc1_2 = "4c000001FX",
luxc1_2 = "4c000005FX",
swxc1_2 = "4c000008FX",
sdxc1_2 = "4c000009FX",
suxc1_2 = "4c00000dFX",
prefx_2 = "4c00000fMX",
["alnv.ps_4"] = "4c00001eFGHS",
["madd.s_4"] = "4c000020FRGH",
["madd.d_4"] = "4c000021FRGH",
["madd.ps_4"] = "4c000026FRGH",
["msub.s_4"] = "4c000028FRGH",
["msub.d_4"] = "4c000029FRGH",
["msub.ps_4"] = "4c00002eFRGH",
["nmadd.s_4"] = "4c000030FRGH",
["nmadd.d_4"] = "4c000031FRGH",
["nmadd.ps_4"] = "4c000036FRGH",
["nmsub.s_4"] = "4c000038FRGH",
["nmsub.d_4"] = "4c000039FRGH",
["nmsub.ps_4"] = "4c00003eFRGH",
}) do map_op[k] = v end
end
------------------------------------------------------------------------------
local function parse_gpr(expr)
local tname, ovreg = match(expr, "^([%w_]+):(r[1-3]?[0-9])$")
local tp = map_type[tname or expr]
if tp then
local reg = ovreg or tp.reg
if not reg then
werror("type `"..(tname or expr).."' needs a register override")
end
expr = reg
end
local r = match(expr, "^r([1-3]?[0-9])$")
if r then
r = tonumber(r)
if r <= 31 then return r, tp end
end
werror("bad register name `"..expr.."'")
end
local function parse_fpr(expr)
local r = match(expr, "^f([1-3]?[0-9])$")
if r then
r = tonumber(r)
if r <= 31 then return r end
end
werror("bad register name `"..expr.."'")
end
local function parse_imm(imm, bits, shift, scale, signed, action)
local n = tonumber(imm)
if n then
local m = sar(n, scale)
if shl(m, scale) == n then
if signed then
local s = sar(m, bits-1)
if s == 0 then return shl(m, shift)
elseif s == -1 then return shl(m + shl(1, bits), shift) end
else
if sar(m, bits) == 0 then return shl(m, shift) end
end
end
werror("out of range immediate `"..imm.."'")
elseif match(imm, "^[rf]([1-3]?[0-9])$") or
match(imm, "^([%w_]+):([rf][1-3]?[0-9])$") then
werror("expected immediate operand, got register")
else
waction(action or "IMM",
(signed and 32768 or 0)+shl(scale, 10)+shl(bits, 5)+shift, imm)
return 0
end
end
local function parse_disp(disp)
local imm, reg = match(disp, "^(.*)%(([%w_:]+)%)$")
if imm then
local r = shl(parse_gpr(reg), 21)
local extname = match(imm, "^extern%s+(%S+)$")
if extname then
waction("REL_EXT", map_extern[extname], nil, 1)
return r
else
return r + parse_imm(imm, 16, 0, 0, true)
end
end
local reg, tailr = match(disp, "^([%w_:]+)%s*(.*)$")
if reg and tailr ~= "" then
local r, tp = parse_gpr(reg)
if tp then
waction("IMM", 32768+16*32, format(tp.ctypefmt, tailr))
return shl(r, 21)
end
end
werror("bad displacement `"..disp.."'")
end
local function parse_index(idx)
local rt, rs = match(idx, "^(.*)%(([%w_:]+)%)$")
if rt then
rt = parse_gpr(rt)
rs = parse_gpr(rs)
return shl(rt, 16) + shl(rs, 21)
end
werror("bad index `"..idx.."'")
end
local function parse_label(label, def)
local prefix = sub(label, 1, 2)
-- =>label (pc label reference)
if prefix == "=>" then
return "PC", 0, sub(label, 3)
end
-- ->name (global label reference)
if prefix == "->" then
return "LG", map_global[sub(label, 3)]
end
if def then
-- [1-9] (local label definition)
if match(label, "^[1-9]$") then
return "LG", 10+tonumber(label)
end
else
-- [<>][1-9] (local label reference)
local dir, lnum = match(label, "^([<>])([1-9])$")
if dir then -- Fwd: 1-9, Bkwd: 11-19.
return "LG", lnum + (dir == ">" and 0 or 10)
end
-- extern label (extern label reference)
local extname = match(label, "^extern%s+(%S+)$")
if extname then
return "EXT", map_extern[extname]
end
end
werror("bad label `"..label.."'")
end
------------------------------------------------------------------------------
-- Handle opcodes defined with template strings.
map_op[".template__"] = function(params, template, nparams)
if not params then return sub(template, 9) end
local op = tonumber(sub(template, 1, 8), 16)
local n = 1
-- Limit number of section buffer positions used by a single dasm_put().
-- A single opcode needs a maximum of 2 positions (ins/ext).
if secpos+2 > maxsecpos then wflush() end
local pos = wpos()
-- Process each character.
for p in gmatch(sub(template, 9), ".") do
if p == "D" then
op = op + shl(parse_gpr(params[n]), 11); n = n + 1
elseif p == "T" then
op = op + shl(parse_gpr(params[n]), 16); n = n + 1
elseif p == "S" then
op = op + shl(parse_gpr(params[n]), 21); n = n + 1
elseif p == "F" then
op = op + shl(parse_fpr(params[n]), 6); n = n + 1
elseif p == "G" then
op = op + shl(parse_fpr(params[n]), 11); n = n + 1
elseif p == "H" then
op = op + shl(parse_fpr(params[n]), 16); n = n + 1
elseif p == "R" then
op = op + shl(parse_fpr(params[n]), 21); n = n + 1
elseif p == "I" then
op = op + parse_imm(params[n], 16, 0, 0, true); n = n + 1
elseif p == "U" then
op = op + parse_imm(params[n], 16, 0, 0, false); n = n + 1
elseif p == "O" then
op = op + parse_disp(params[n]); n = n + 1
elseif p == "X" then
op = op + parse_index(params[n]); n = n + 1
elseif p == "B" or p == "J" or p == "K" or p == "L" then
local mode, m, s = parse_label(params[n], false)
if p == "J" then m = m + 0xa800
elseif p == "K" then m = m + 0x5000
elseif p == "L" then m = m + 0xa000 end
waction("REL_"..mode, m, s, 1)
n = n + 1
elseif p == "A" then
op = op + parse_imm(params[n], 5, 6, 0, false); n = n + 1
elseif p == "a" then
local m = parse_imm(params[n], 6, 6, 0, false, "IMMS"); n = n + 1
op = op + band(m, 0x7c0) + band(shr(m, 9), 4)
elseif p == "M" then
op = op + parse_imm(params[n], 5, 11, 0, false); n = n + 1
elseif p == "N" then
op = op + parse_imm(params[n], 5, 16, 0, false); n = n + 1
elseif p == "C" then
op = op + parse_imm(params[n], 3, 18, 0, false); n = n + 1
elseif p == "V" then