--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/luajit/dynasm/dasm_mips.lua	Fri Jan 23 22:38:59 2026 -0800
@@ -0,0 +1,1181 @@
+------------------------------------------------------------------------------
+-- 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
+      op = op + parse_imm(params[n], 3, 8, 0, false); n = n + 1
+    elseif p == "W" then
+      op = op + parse_imm(params[n], 3, 0, 0, false); n = n + 1
+    elseif p == "Y" then
+      op = op + parse_imm(params[n], 20, 6, 0, false); n = n + 1
+    elseif p == "Z" then
+      op = op + parse_imm(params[n], 10, 6, 0, false); n = n + 1
+    elseif p == "=" then
+      n = n - 1 -- Re-use previous parameter for next template char.
+    else
+      assert(false)
+    end
+  end
+  wputpos(pos, op)
+end
+
+------------------------------------------------------------------------------
+
+-- Pseudo-opcode to mark the position where the action list is to be emitted.
+map_op[".actionlist_1"] = function(params)
+  if not params then return "cvar" end
+  local name = params[1] -- No syntax check. You get to keep the pieces.
+  wline(function(out) writeactions(out, name) end)
+end
+
+-- Pseudo-opcode to mark the position where the global enum is to be emitted.
+map_op[".globals_1"] = function(params)
+  if not params then return "prefix" end
+  local prefix = params[1] -- No syntax check. You get to keep the pieces.
+  wline(function(out) writeglobals(out, prefix) end)
+end
+
+-- Pseudo-opcode to mark the position where the global names are to be emitted.
+map_op[".globalnames_1"] = function(params)
+  if not params then return "cvar" end
+  local name = params[1] -- No syntax check. You get to keep the pieces.
+  wline(function(out) writeglobalnames(out, name) end)
+end
+
+-- Pseudo-opcode to mark the position where the extern names are to be emitted.
+map_op[".externnames_1"] = function(params)
+  if not params then return "cvar" end
+  local name = params[1] -- No syntax check. You get to keep the pieces.
+  wline(function(out) writeexternnames(out, name) end)
+end
+
+------------------------------------------------------------------------------
+
+-- Label pseudo-opcode (converted from trailing colon form).
+map_op[".label_1"] = function(params)
+  if not params then return "[1-9] | ->global | =>pcexpr" end
+  if secpos+1 > maxsecpos then wflush() end
+  local mode, n, s = parse_label(params[1], true)
+  if mode == "EXT" then werror("bad label definition") end
+  waction("LABEL_"..mode, n, s, 1)
+end
+
+------------------------------------------------------------------------------
+
+-- Pseudo-opcodes for data storage.
+map_op[".long_*"] = function(params)
+  if not params then return "imm..." end
+  for _,p in ipairs(params) do
+    local n = tonumber(p)
+    if not n then werror("bad immediate `"..p.."'") end
+    if n < 0 then n = n + 2^32 end
+    wputw(n)
+    if secpos+2 > maxsecpos then wflush() end
+  end
+end
+
+-- Alignment pseudo-opcode.
+map_op[".align_1"] = function(params)
+  if not params then return "numpow2" end
+  if secpos+1 > maxsecpos then wflush() end
+  local align = tonumber(params[1])
+  if align then
+    local x = align
+    -- Must be a power of 2 in the range (2 ... 256).
+    for i=1,8 do
+      x = x / 2
+      if x == 1 then
+	waction("ALIGN", align-1, nil, 1) -- Action byte is 2**n-1.
+	return
+      end
+    end
+  end
+  werror("bad alignment")
+end
+
+------------------------------------------------------------------------------
+
+-- Pseudo-opcode for (primitive) type definitions (map to C types).
+map_op[".type_3"] = function(params, nparams)
+  if not params then
+    return nparams == 2 and "name, ctype" or "name, ctype, reg"
+  end
+  local name, ctype, reg = params[1], params[2], params[3]
+  if not match(name, "^[%a_][%w_]*$") then
+    werror("bad type name `"..name.."'")
+  end
+  local tp = map_type[name]
+  if tp then
+    werror("duplicate type `"..name.."'")
+  end
+  -- Add #type to defines. A bit unclean to put it in map_archdef.
+  map_archdef["#"..name] = "sizeof("..ctype..")"
+  -- Add new type and emit shortcut define.
+  local num = ctypenum + 1
+  map_type[name] = {
+    ctype = ctype,
+    ctypefmt = format("Dt%X(%%s)", num),
+    reg = reg,
+  }
+  wline(format("#define Dt%X(_V) (int)(ptrdiff_t)&(((%s *)0)_V)", num, ctype))
+  ctypenum = num
+end
+map_op[".type_2"] = map_op[".type_3"]
+
+-- Dump type definitions.
+local function dumptypes(out, lvl)
+  local t = {}
+  for name in pairs(map_type) do t[#t+1] = name end
+  sort(t)
+  out:write("Type definitions:\n")
+  for _,name in ipairs(t) do
+    local tp = map_type[name]
+    local reg = tp.reg or ""
+    out:write(format("  %-20s %-20s %s\n", name, tp.ctype, reg))
+  end
+  out:write("\n")
+end
+
+------------------------------------------------------------------------------
+
+-- Set the current section.
+function _M.section(num)
+  waction("SECTION", num)
+  wflush(true) -- SECTION is a terminal action.
+end
+
+------------------------------------------------------------------------------
+
+-- Dump architecture description.
+function _M.dumparch(out)
+  out:write(format("DynASM %s version %s, released %s\n\n",
+    _info.arch, _info.version, _info.release))
+  dumpactions(out)
+end
+
+-- Dump all user defined elements.
+function _M.dumpdef(out, lvl)
+  dumptypes(out, lvl)
+  dumpglobals(out, lvl)
+  dumpexterns(out, lvl)
+end
+
+------------------------------------------------------------------------------
+
+-- Pass callbacks from/to the DynASM core.
+function _M.passcb(wl, we, wf, ww)
+  wline, werror, wfatal, wwarn = wl, we, wf, ww
+  return wflush
+end
+
+-- Setup the arch-specific module.
+function _M.setup(arch, opt)
+  g_arch, g_opt = arch, opt
+end
+
+-- Merge the core maps and the arch-specific maps.
+function _M.mergemaps(map_coreop, map_def)
+  setmetatable(map_op, { __index = map_coreop })
+  setmetatable(map_def, { __index = map_archdef })
+  return map_op, map_def
+end
+
+return _M
+
+------------------------------------------------------------------------------
+