Renamed lib to deps so github will ignore it for language stats

1 files changed, 0 insertions, 1216 deletions

diff --git a/lib/LuaJIT/src/jit/dis_arm64.lua b/lib/LuaJIT/src/jit/dis_arm64.lua
deleted file mode 100644
index a717332..0000000
--- a/lib/LuaJIT/src/jit/dis_arm64.lua
+++ /dev/null
@@ -1,1216 +0,0 @@
-----------------------------------------------------------------------------
--- LuaJIT ARM64 disassembler module.
---
--- Copyright (C) 2005-2017 Mike Pall. All rights reserved.
--- Released under the MIT license. See Copyright Notice in luajit.h
---
--- Contributed by Djordje Kovacevic and Stefan Pejic from RT-RK.com.
--- Sponsored by Cisco Systems, Inc.
-----------------------------------------------------------------------------
--- This is a helper module used by the LuaJIT machine code dumper module.
---
--- It disassembles most user-mode AArch64 instructions.
--- NYI: Advanced SIMD and VFP instructions.
-------------------------------------------------------------------------------
-
-local type = type
-local sub, byte, format = string.sub, string.byte, string.format
-local match, gmatch, gsub = string.match, string.gmatch, string.gsub
-local concat = table.concat
-local bit = require("bit")
-local band, bor, bxor, tohex = bit.band, bit.bor, bit.bxor, bit.tohex
-local lshift, rshift, arshift = bit.lshift, bit.rshift, bit.arshift
-local ror = bit.ror
-
-------------------------------------------------------------------------------
--- Opcode maps
-------------------------------------------------------------------------------
-
-local map_adr = { -- PC-relative addressing.
-  shift = 31, mask = 1,
-  [0] = "adrDBx", "adrpDBx"
-}
-
-local map_addsubi = { -- Add/subtract immediate.
-  shift = 29, mask = 3,
-  [0] = "add|movDNIg", "adds|cmnD0NIg", "subDNIg", "subs|cmpD0NIg",
-}
-
-local map_logi = { -- Logical immediate.
-  shift = 31, mask = 1,
-  [0] = {
-    shift = 22, mask = 1,
-    [0] = {
-      shift = 29, mask = 3,
-      [0] = "andDNig", "orr|movDN0ig", "eorDNig", "ands|tstD0Nig"
-    },
-    false -- unallocated
-  },
-  {
-    shift = 29, mask = 3,
-    [0] = "andDNig", "orr|movDN0ig", "eorDNig", "ands|tstD0Nig"
-  }
-}
-
-local map_movwi = { -- Move wide immediate.
-  shift = 31, mask = 1,
-  [0] = {
-    shift = 22, mask = 1,
-    [0] = {
-      shift = 29, mask = 3,
-      [0] = "movnDWRg", false, "movz|movDYRg", "movkDWRg"
-    }, false -- unallocated
-  },
-  {
-    shift = 29, mask = 3,
-    [0] = "movnDWRg", false, "movz|movDYRg", "movkDWRg"
-  },
-}
-
-local map_bitf = { -- Bitfield.
-  shift = 31, mask = 1,
-  [0] = {
-    shift = 22, mask = 1,
-    [0] = {
-      shift = 29, mask = 3,
-      [0] = "sbfm|sbfiz|sbfx|asr|sxtw|sxth|sxtbDN12w",
-      "bfm|bfi|bfxilDN13w",
-      "ubfm|ubfiz|ubfx|lsr|lsl|uxth|uxtbDN12w"
-    }
-  },
-  {
-    shift = 22, mask = 1,
-    {
-      shift = 29, mask = 3,
-      [0] = "sbfm|sbfiz|sbfx|asr|sxtw|sxth|sxtbDN12x",
-      "bfm|bfi|bfxilDN13x",
-      "ubfm|ubfiz|ubfx|lsr|lsl|uxth|uxtbDN12x"
-    }
-  }
-}
-
-local map_datai = { -- Data processing - immediate.
-  shift = 23, mask = 7,
-  [0] = map_adr, map_adr, map_addsubi, false,
-  map_logi, map_movwi, map_bitf,
-  {
-    shift = 15, mask = 0x1c0c1,
-    [0] = "extr|rorDNM4w", [0x10080] = "extr|rorDNM4x",
-    [0x10081] = "extr|rorDNM4x"
-  }
-}
-
-local map_logsr = { -- Logical, shifted register.
-  shift = 31, mask = 1,
-  [0] = {
-    shift = 15, mask = 1,
-    [0] = {
-      shift = 29, mask = 3,
-      [0] = {
-	shift = 21, mask = 7,
-	[0] = "andDNMSg", "bicDNMSg", "andDNMSg", "bicDNMSg",
-	"andDNMSg", "bicDNMSg", "andDNMg", "bicDNMg"
-      },
-      {
-	shift = 21, mask = 7,
-	[0] ="orr|movDN0MSg", "orn|mvnDN0MSg", "orr|movDN0MSg", "orn|mvnDN0MSg",
-	     "orr|movDN0MSg", "orn|mvnDN0MSg", "orr|movDN0Mg", "orn|mvnDN0Mg"
-      },
-      {
-	shift = 21, mask = 7,
-	[0] = "eorDNMSg", "eonDNMSg", "eorDNMSg", "eonDNMSg",
-	"eorDNMSg", "eonDNMSg", "eorDNMg", "eonDNMg"
-      },
-      {
-	shift = 21, mask = 7,
-	[0] = "ands|tstD0NMSg", "bicsDNMSg", "ands|tstD0NMSg", "bicsDNMSg",
-	"ands|tstD0NMSg", "bicsDNMSg", "ands|tstD0NMg", "bicsDNMg"
-      }
-    },
-    false -- unallocated
-  },
-  {
-    shift = 29, mask = 3,
-    [0] = {
-      shift = 21, mask = 7,
-      [0] = "andDNMSg", "bicDNMSg", "andDNMSg", "bicDNMSg",
-      "andDNMSg", "bicDNMSg", "andDNMg", "bicDNMg"
-    },
-    {
-      shift = 21, mask = 7,
-      [0] = "orr|movDN0MSg", "orn|mvnDN0MSg", "orr|movDN0MSg", "orn|mvnDN0MSg",
-      "orr|movDN0MSg", "orn|mvnDN0MSg", "orr|movDN0Mg", "orn|mvnDN0Mg"
-    },
-    {
-      shift = 21, mask = 7,
-      [0] = "eorDNMSg", "eonDNMSg", "eorDNMSg", "eonDNMSg",
-      "eorDNMSg", "eonDNMSg", "eorDNMg", "eonDNMg"
-    },
-    {
-      shift = 21, mask = 7,
-      [0] = "ands|tstD0NMSg", "bicsDNMSg", "ands|tstD0NMSg", "bicsDNMSg",
-      "ands|tstD0NMSg", "bicsDNMSg", "ands|tstD0NMg", "bicsDNMg"
-    }
-  }
-}
-
-local map_assh = {
-  shift = 31, mask = 1,
-  [0] = {
-    shift = 15, mask = 1,
-    [0] = {
-      shift = 29, mask = 3,
-      [0] = {
-	shift = 22, mask = 3,
-	[0] = "addDNMSg", "addDNMSg", "addDNMSg", "addDNMg"
-      },
-      {
-	shift = 22, mask = 3,
-	[0] = "adds|cmnD0NMSg", "adds|cmnD0NMSg",
-	      "adds|cmnD0NMSg", "adds|cmnD0NMg"
-      },
-      {
-	shift = 22, mask = 3,
-	[0] = "sub|negDN0MSg", "sub|negDN0MSg", "sub|negDN0MSg", "sub|negDN0Mg"
-      },
-      {
-	shift = 22, mask = 3,
-	[0] = "subs|cmp|negsD0N0MzSg", "subs|cmp|negsD0N0MzSg",
-	      "subs|cmp|negsD0N0MzSg", "subs|cmp|negsD0N0Mzg"
-      },
-    },
-    false -- unallocated
-  },
-  {
-    shift = 29, mask = 3,
-    [0] = {
-      shift = 22, mask = 3,
-      [0] = "addDNMSg", "addDNMSg", "addDNMSg", "addDNMg"
-    },
-    {
-      shift = 22, mask = 3,
-      [0] = "adds|cmnD0NMSg", "adds|cmnD0NMSg", "adds|cmnD0NMSg",
-	    "adds|cmnD0NMg"
-    },
-    {
-      shift = 22, mask = 3,
-      [0] = "sub|negDN0MSg", "sub|negDN0MSg", "sub|negDN0MSg", "sub|negDN0Mg"
-    },
-    {
-      shift = 22, mask = 3,
-      [0] = "subs|cmp|negsD0N0MzSg", "subs|cmp|negsD0N0MzSg",
-	    "subs|cmp|negsD0N0MzSg", "subs|cmp|negsD0N0Mzg"
-    }
-  }
-}
-
-local map_addsubsh = { -- Add/subtract, shifted register.
-  shift = 22, mask = 3,
-  [0] = map_assh, map_assh, map_assh
-}
-
-local map_addsubex = { -- Add/subtract, extended register.
-  shift = 22, mask = 3,
-  [0] = {
-    shift = 29, mask = 3,
-    [0] = "addDNMXg", "adds|cmnD0NMXg", "subDNMXg", "subs|cmpD0NMzXg",
-  }
-}
-
-local map_addsubc = { -- Add/subtract, with carry.
-  shift = 10, mask = 63,
-  [0] = {
-    shift = 29, mask = 3,
-    [0] = "adcDNMg", "adcsDNMg", "sbc|ngcDN0Mg", "sbcs|ngcsDN0Mg",
-  }
-}
-
-local map_ccomp = {
-  shift = 4, mask = 1,
-  [0] = {
-    shift = 10, mask = 3,
-    [0] = { -- Conditional compare register.
-      shift = 29, mask = 3,
-      "ccmnNMVCg", false, "ccmpNMVCg",
-    },
-    [2] = {  -- Conditional compare immediate.
-      shift = 29, mask = 3,
-      "ccmnN5VCg", false, "ccmpN5VCg",
-    }
-  }
-}
-
-local map_csel = { -- Conditional select.
-  shift = 11, mask = 1,
-  [0] = {
-    shift = 10, mask = 1,
-    [0] = {
-      shift = 29, mask = 3,
-      [0] = "cselDNMzCg", false, "csinv|cinv|csetmDNMcg", false,
-    },
-    {
-      shift = 29, mask = 3,
-      [0] = "csinc|cinc|csetDNMcg", false, "csneg|cnegDNMcg", false,
-    }
-  }
-}
-
-local map_data1s = { -- Data processing, 1 source.
-  shift = 29, mask = 1,
-  [0] = {
-    shift = 31, mask = 1,
-    [0] = {
-      shift = 10, mask = 0x7ff,
-      [0] = "rbitDNg", "rev16DNg", "revDNw", false, "clzDNg", "clsDNg"
-    },
-    {
-      shift = 10, mask = 0x7ff,
-      [0] = "rbitDNg", "rev16DNg", "rev32DNx", "revDNx", "clzDNg", "clsDNg"
-    }
-  }
-}
-
-local map_data2s = { -- Data processing, 2 sources.
-  shift = 29, mask = 1,
-  [0] = {
-    shift = 10, mask = 63,
-    false, "udivDNMg", "sdivDNMg", false, false, false, false, "lslDNMg",
-    "lsrDNMg", "asrDNMg", "rorDNMg"
-  }
-}
-
-local map_data3s = { -- Data processing, 3 sources.
-  shift = 29, mask = 7,
-  [0] = {
-    shift = 21, mask = 7,
-    [0] = {
-      shift = 15, mask = 1,
-      [0] = "madd|mulDNMA0g", "msub|mnegDNMA0g"
-    }
-  }, false, false, false,
-  {
-    shift = 15, mask = 1,
-    [0] = {
-      shift = 21, mask = 7,
-      [0] = "madd|mulDNMA0g", "smaddl|smullDxNMwA0x", "smulhDNMx", false,
-      false, "umaddl|umullDxNMwA0x", "umulhDNMx"
-    },
-    {
-      shift = 21, mask = 7,
-      [0] = "msub|mnegDNMA0g", "smsubl|smneglDxNMwA0x", false, false,
-      false, "umsubl|umneglDxNMwA0x"
-    }
-  }
-}
-
-local map_datar = { -- Data processing, register.
-  shift = 28, mask = 1,
-  [0] = {
-    shift = 24, mask = 1,
-    [0] = map_logsr,
-    {
-      shift = 21, mask = 1,
-      [0] = map_addsubsh, map_addsubex
-    }
-  },
-  {
-    shift = 21, mask = 15,
-    [0] = map_addsubc, false, map_ccomp, false, map_csel, false,
-    {
-      shift = 30, mask = 1,
-      [0] = map_data2s, map_data1s
-    },
-    false, map_data3s, map_data3s, map_data3s, map_data3s, map_data3s,
-    map_data3s, map_data3s, map_data3s
-  }
-}
-
-local map_lrl = { -- Load register, literal.
-  shift = 26, mask = 1,
-  [0] = {
-    shift = 30, mask = 3,
-    [0] = "ldrDwB", "ldrDxB", "ldrswDxB"
-  },
-  {
-    shift = 30, mask = 3,
-    [0] = "ldrDsB", "ldrDdB"
-  }
-}
-
-local map_lsriind = { -- Load/store register, immediate pre/post-indexed.
-  shift = 30, mask = 3,
-  [0] = {
-    shift = 26, mask = 1,
-    [0] = {
-      shift = 22, mask = 3,
-      [0] = "strbDwzL", "ldrbDwzL", "ldrsbDxzL", "ldrsbDwzL"
-    }
-  },
-  {
-    shift = 26, mask = 1,
-    [0] = {
-      shift = 22, mask = 3,
-      [0] = "strhDwzL", "ldrhDwzL", "ldrshDxzL", "ldrshDwzL"
-    }
-  },
-  {
-    shift = 26, mask = 1,
-    [0] = {
-      shift = 22, mask = 3,
-      [0] = "strDwzL", "ldrDwzL", "ldrswDxzL"
-    },
-    {
-      shift = 22, mask = 3,
-      [0] = "strDszL", "ldrDszL"
-    }
-  },
-  {
-    shift = 26, mask = 1,
-    [0] = {
-      shift = 22, mask = 3,
-      [0] = "strDxzL", "ldrDxzL"
-    },
-    {
-      shift = 22, mask = 3,
-      [0] = "strDdzL", "ldrDdzL"
-    }
-  }
-}
-
-local map_lsriro = {
-  shift = 21, mask = 1,
-  [0] = {  -- Load/store register immediate.
-    shift = 10, mask = 3,
-    [0] = { -- Unscaled immediate.
-      shift = 26, mask = 1,
-      [0] = {
-	shift = 30, mask = 3,
-	[0] = {
-	  shift = 22, mask = 3,
-	  [0] = "sturbDwK", "ldurbDwK"
-	},
-	{
-	  shift = 22, mask = 3,
-	  [0] = "sturhDwK", "ldurhDwK"
-	},
-	{
-	  shift = 22, mask = 3,
-	  [0] = "sturDwK", "ldurDwK"
-	},
-	{
-	  shift = 22, mask = 3,
-	  [0] = "sturDxK", "ldurDxK"
-	}
-      }
-    }, map_lsriind, false, map_lsriind
-  },
-  {  -- Load/store register, register offset.
-    shift = 10, mask = 3,
-    [2] = {
-      shift = 26, mask = 1,
-      [0] = {
-	shift = 30, mask = 3,
-	[0] = {
-	  shift = 22, mask = 3,
-	  [0] = "strbDwO", "ldrbDwO", "ldrsbDxO", "ldrsbDwO"
-	},
-	{
-	  shift = 22, mask = 3,
-	  [0] = "strhDwO", "ldrhDwO", "ldrshDxO", "ldrshDwO"
-	},
-	{
-	  shift = 22, mask = 3,
-	  [0] = "strDwO", "ldrDwO", "ldrswDxO"
-	},
-	{
-	  shift = 22, mask = 3,
-	  [0] = "strDxO", "ldrDxO"
-	}
-      },
-      {
-	shift = 30, mask = 3,
-	[2] = {
-	  shift = 22, mask = 3,
-	  [0] = "strDsO", "ldrDsO"
-	},
-	[3] = {
-	  shift = 22, mask = 3,
-	  [0] = "strDdO", "ldrDdO"
-	}
-      }
-    }
-  }
-}
-
-local map_lsp = { -- Load/store register pair, offset.
-  shift = 22, mask = 1,
-  [0] = {
-    shift = 30, mask = 3,
-    [0] = {
-      shift = 26, mask = 1,
-      [0] = "stpDzAzwP", "stpDzAzsP",
-    },
-    {
-      shift = 26, mask = 1,
-      "stpDzAzdP"
-    },
-    {
-      shift = 26, mask = 1,
-      [0] = "stpDzAzxP"
-    }
-  },
-  {
-    shift = 30, mask = 3,
-    [0] = {
-      shift = 26, mask = 1,
-      [0] = "ldpDzAzwP", "ldpDzAzsP",
-    },
-    {
-      shift = 26, mask = 1,
-      [0] = "ldpswDAxP", "ldpDzAzdP"
-    },
-    {
-      shift = 26, mask = 1,
-      [0] = "ldpDzAzxP"
-    }
-  }
-}
-
-local map_ls = { -- Loads and stores.
-  shift = 24, mask = 0x31,
-  [0x10] = map_lrl, [0x30] = map_lsriro,
-  [0x20] = {
-    shift = 23, mask = 3,
-    map_lsp, map_lsp, map_lsp
-  },
-  [0x21] = {
-    shift = 23, mask = 3,
-    map_lsp, map_lsp, map_lsp
-  },
-  [0x31] = {
-    shift = 26, mask = 1,
-    [0] = {
-      shift = 30, mask = 3,
-      [0] = {
-	shift = 22, mask = 3,
-	[0] = "strbDwzU", "ldrbDwzU"
-      },
-      {
-	shift = 22, mask = 3,
-	[0] = "strhDwzU", "ldrhDwzU"
-      },
-      {
-	shift = 22, mask = 3,
-	[0] = "strDwzU", "ldrDwzU"
-      },
-      {
-	shift = 22, mask = 3,
-	[0] = "strDxzU", "ldrDxzU"
-      }
-    },
-    {
-      shift = 30, mask = 3,
-      [2] = {
-	shift = 22, mask = 3,
-	[0] = "strDszU", "ldrDszU"
-      },
-      [3] = {
-	shift = 22, mask = 3,
-	[0] = "strDdzU", "ldrDdzU"
-      }
-    }
-  },
-}
-
-local map_datafp = { -- Data processing, SIMD and FP.
-  shift = 28, mask = 7,
-  { -- 001
-    shift = 24, mask = 1,
-    [0] = {
-      shift = 21, mask = 1,
-      {
-	shift = 10, mask = 3,
-	[0] = {
-	  shift = 12, mask = 1,
-	  [0] = {
-	    shift = 13, mask = 1,
-	    [0] = {
-	      shift = 14, mask = 1,
-	      [0] = {
-		shift = 15, mask = 1,
-		[0] = { -- FP/int conversion.
-		  shift = 31, mask = 1,
-		  [0] = {
-		    shift = 16, mask = 0xff,
-		    [0x20] = "fcvtnsDwNs", [0x21] = "fcvtnuDwNs",
-		    [0x22] = "scvtfDsNw", [0x23] = "ucvtfDsNw",
-		    [0x24] = "fcvtasDwNs", [0x25] = "fcvtauDwNs",
-		    [0x26] = "fmovDwNs", [0x27] = "fmovDsNw",
-		    [0x28] = "fcvtpsDwNs", [0x29] = "fcvtpuDwNs",
-		    [0x30] = "fcvtmsDwNs", [0x31] = "fcvtmuDwNs",
-		    [0x38] = "fcvtzsDwNs", [0x39] = "fcvtzuDwNs",
-		    [0x60] = "fcvtnsDwNd", [0x61] = "fcvtnuDwNd",
-		    [0x62] = "scvtfDdNw", [0x63] = "ucvtfDdNw",
-		    [0x64] = "fcvtasDwNd", [0x65] = "fcvtauDwNd",
-		    [0x68] = "fcvtpsDwNd", [0x69] = "fcvtpuDwNd",
-		    [0x70] = "fcvtmsDwNd", [0x71] = "fcvtmuDwNd",
-		    [0x78] = "fcvtzsDwNd", [0x79] = "fcvtzuDwNd"
-		  },
-		  {
-		    shift = 16, mask = 0xff,
-		    [0x20] = "fcvtnsDxNs", [0x21] = "fcvtnuDxNs",
-		    [0x22] = "scvtfDsNx", [0x23] = "ucvtfDsNx",
-		    [0x24] = "fcvtasDxNs", [0x25] = "fcvtauDxNs",
-		    [0x28] = "fcvtpsDxNs", [0x29] = "fcvtpuDxNs",
-		    [0x30] = "fcvtmsDxNs", [0x31] = "fcvtmuDxNs",
-		    [0x38] = "fcvtzsDxNs", [0x39] = "fcvtzuDxNs",
-		    [0x60] = "fcvtnsDxNd", [0x61] = "fcvtnuDxNd",
-		    [0x62] = "scvtfDdNx", [0x63] = "ucvtfDdNx",
-		    [0x64] = "fcvtasDxNd", [0x65] = "fcvtauDxNd",
-		    [0x66] = "fmovDxNd", [0x67] = "fmovDdNx",
-		    [0x68] = "fcvtpsDxNd", [0x69] = "fcvtpuDxNd",
-		    [0x70] = "fcvtmsDxNd", [0x71] = "fcvtmuDxNd",
-		    [0x78] = "fcvtzsDxNd", [0x79] = "fcvtzuDxNd"
-		  }
-		}
-	      },
-	      { -- FP data-processing, 1 source.
-		shift = 31, mask = 1,
-		[0] = {
-		  shift = 22, mask = 3,
-		  [0] = {
-		    shift = 15, mask = 63,
-		    [0] = "fmovDNf", "fabsDNf", "fnegDNf",
-		    "fsqrtDNf", false, "fcvtDdNs", false, false,
-		    "frintnDNf", "frintpDNf", "frintmDNf", "frintzDNf",
-		    "frintaDNf", false, "frintxDNf", "frintiDNf",
-		  },
-		  {
-		    shift = 15, mask = 63,
-		    [0] = "fmovDNf", "fabsDNf", "fnegDNf",
-		    "fsqrtDNf", "fcvtDsNd", false, false, false,
-		    "frintnDNf", "frintpDNf", "frintmDNf", "frintzDNf",
-		    "frintaDNf", false, "frintxDNf", "frintiDNf",
-		  }
-		}
-	      }
-	    },
-	    { -- FP compare.
-	      shift = 31, mask = 1,
-	      [0] = {
-		shift = 14, mask = 3,
-		[0] = {
-		  shift = 23, mask = 1,
-		  [0] = {
-		    shift = 0, mask = 31,
-		    [0] = "fcmpNMf", [8] = "fcmpNZf",
-		    [16] = "fcmpeNMf", [24] = "fcmpeNZf",
-		  }
-		}
-	      }
-	    }
-	  },
-	  { -- FP immediate.
-	    shift = 31, mask = 1,
-	    [0] = {
-	      shift = 5, mask = 31,
-	      [0] = {
-		shift = 23, mask = 1,
-		[0] = "fmovDFf"
-	      }
-	    }
-	  }
-	},
-	{ -- FP conditional compare.
-	  shift = 31, mask = 1,
-	  [0] = {
-	    shift = 23, mask = 1,
-	    [0] = {
-	      shift = 4, mask = 1,
-	      [0] = "fccmpNMVCf", "fccmpeNMVCf"
-	    }
-	  }
-	},
-	{ -- FP data-processing, 2 sources.
-	  shift = 31, mask = 1,
-	  [0] = {
-	    shift = 23, mask = 1,
-	    [0] = {
-	      shift = 12, mask = 15,
-	      [0] = "fmulDNMf", "fdivDNMf", "faddDNMf", "fsubDNMf",
-	      "fmaxDNMf", "fminDNMf", "fmaxnmDNMf", "fminnmDNMf",
-	      "fnmulDNMf"
-	    }
-	  }
-	},
-	{ -- FP conditional select.
-	  shift = 31, mask = 1,
-	  [0] = {
-	    shift = 23, mask = 1,
-	    [0] = "fcselDNMCf"
-	  }
-	}
-      }
-    },
-    { -- FP data-processing, 3 sources.
-      shift = 31, mask = 1,
-      [0] = {
-	shift = 15, mask = 1,
-	[0] = {
-	  shift = 21, mask = 5,
-	  [0] = "fmaddDNMAf", "fnmaddDNMAf"
-	},
-	{
-	  shift = 21, mask = 5,
-	  [0] = "fmsubDNMAf", "fnmsubDNMAf"
-	}
-      }
-    }
-  }
-}
-
-local map_br = { -- Branches, exception generating and system instructions.
-  shift = 29, mask = 7,
-  [0] = "bB",
-  { -- Compare & branch, immediate.
-    shift = 24, mask = 3,
-    [0] = "cbzDBg", "cbnzDBg", "tbzDTBw", "tbnzDTBw"
-  },
-  { -- Conditional branch, immediate.
-    shift = 24, mask = 3,
-    [0] = {
-      shift = 4, mask = 1,
-      [0] = {
-	shift = 0, mask = 15,
-	[0] = "beqB", "bneB", "bhsB", "bloB", "bmiB", "bplB", "bvsB", "bvcB",
-	"bhiB", "blsB", "bgeB", "bltB", "bgtB", "bleB", "balB"
-      }
-    }
-  }, false, "blB",
-  { -- Compare & branch, immediate.
-    shift = 24, mask = 3,
-    [0] = "cbzDBg", "cbnzDBg", "tbzDTBx", "tbnzDTBx"
-  },
-  {
-    shift = 24, mask = 3,
-    [0] = { -- Exception generation.
-      shift = 0, mask = 0xe0001f,
-      [0x200000] = "brkW"
-    },
-    { -- System instructions.
-      shift = 0, mask = 0x3fffff,
-      [0x03201f] = "nop"
-    },
-    { -- Unconditional branch, register.
-      shift = 0, mask = 0xfffc1f,
-      [0x1f0000] = "brNx", [0x3f0000] = "blrNx",
-      [0x5f0000] = "retNx"
-    },
-  }
-}
-
-local map_init = {
-  shift = 25, mask = 15,
-  [0] = false, false, false, false, map_ls, map_datar, map_ls, map_datafp,
-  map_datai, map_datai, map_br, map_br, map_ls, map_datar, map_ls, map_datafp
-}
-
-------------------------------------------------------------------------------
-
-local map_regs = { x = {}, w = {}, d = {}, s = {} }
-
-for i=0,30 do
-  map_regs.x[i] = "x"..i
-  map_regs.w[i] = "w"..i
-  map_regs.d[i] = "d"..i
-  map_regs.s[i] = "s"..i
-end
-map_regs.x[31] = "sp"
-map_regs.w[31] = "wsp"
-map_regs.d[31] = "d31"
-map_regs.s[31] = "s31"
-
-local map_cond = {
-  [0] = "eq", "ne", "cs", "cc", "mi", "pl", "vs", "vc",
-  "hi", "ls", "ge", "lt", "gt", "le", "al",
-}
-
-local map_shift = { [0] = "lsl", "lsr", "asr", }
-
-local map_extend = {
-  [0] = "uxtb", "uxth", "uxtw", "uxtx", "sxtb", "sxth", "sxtw", "sxtx",
-}
-
-------------------------------------------------------------------------------
-
--- Output a nicely formatted line with an opcode and operands.
-local function putop(ctx, text, operands)
-  local pos = ctx.pos
-  local extra = ""
-  if ctx.rel then
-    local sym = ctx.symtab[ctx.rel]
-    if sym then
-      extra = "\t->"..sym
-    end
-  end
-  if ctx.hexdump > 0 then
-    ctx.out(format("%08x  %s  %-5s %s%s\n",
-      ctx.addr+pos, tohex(ctx.op), text, concat(operands, ", "), extra))
-  else
-    ctx.out(format("%08x  %-5s %s%s\n",
-      ctx.addr+pos, text, concat(operands, ", "), extra))
-  end
-  ctx.pos = pos + 4
-end
-
--- Fallback for unknown opcodes.
-local function unknown(ctx)
-  return putop(ctx, ".long", { "0x"..tohex(ctx.op) })
-end
-
-local function match_reg(p, pat, regnum)
-  return map_regs[match(pat, p.."%w-([xwds])")][regnum]
-end
-
-local function fmt_hex32(x)
-  if x < 0 then
-    return tohex(x)
-  else
-    return format("%x", x)
-  end
-end
-
-local imm13_rep = { 0x55555555, 0x11111111, 0x01010101, 0x00010001, 0x00000001 }
-
-local function decode_imm13(op)
-  local imms = band(rshift(op, 10), 63)
-  local immr = band(rshift(op, 16), 63)
-  if band(op, 0x00400000) == 0 then
-    local len = 5
-    if imms >= 56 then
-      if imms >= 60 then len = 1 else len = 2 end
-    elseif imms >= 48 then len = 3 elseif imms >= 32 then len = 4 end
-    local l = lshift(1, len)-1
-    local s = band(imms, l)
-    local r = band(immr, l)
-    local imm = ror(rshift(-1, 31-s), r)
-    if len ~= 5 then imm = band(imm, lshift(1, l)-1) + rshift(imm, 31-l) end
-    imm = imm * imm13_rep[len]
-    local ix = fmt_hex32(imm)
-    if rshift(op, 31) ~= 0 then
-      return ix..tohex(imm)
-    else
-      return ix
-    end
-  else
-    local lo, hi = -1, 0
-    if imms < 32 then lo = rshift(-1, 31-imms) else hi = rshift(-1, 63-imms) end
-    if immr ~= 0 then
-      lo, hi = ror(lo, immr), ror(hi, immr)
-      local x = immr == 32 and 0 or band(bxor(lo, hi), lshift(-1, 32-immr))
-      lo, hi = bxor(lo, x), bxor(hi, x)
-      if immr >= 32 then lo, hi = hi, lo end
-    end
-    if hi ~= 0 then
-      return fmt_hex32(hi)..tohex(lo)
-    else
-      return fmt_hex32(lo)
-    end
-  end
-end
-
-local function parse_immpc(op, name)
-  if name == "b" or name == "bl" then
-    return arshift(lshift(op, 6), 4)
-  elseif name == "adr" or name == "adrp" then
-    local immlo = band(rshift(op, 29), 3)
-    local immhi = lshift(arshift(lshift(op, 8), 13), 2)
-    return bor(immhi, immlo)
-  elseif name == "tbz" or name == "tbnz" then
-    return lshift(arshift(lshift(op, 13), 18), 2)
-  else
-    return lshift(arshift(lshift(op, 8), 13), 2)
-  end
-end
-
-local function parse_fpimm8(op)
-  local sign = band(op, 0x100000) == 0 and 1 or -1
-  local exp = bxor(rshift(arshift(lshift(op, 12), 5), 24), 0x80) - 131
-  local frac = 16+band(rshift(op, 13), 15)
-  return sign * frac * 2^exp
-end
-
-local function prefer_bfx(sf, uns, imms, immr)
-  if imms < immr or imms == 31 or imms == 63 then
-    return false
-  end
-  if immr == 0 then
-    if sf == 0 and (imms == 7 or imms == 15) then
-      return false
-    end
-    if sf ~= 0 and uns == 0 and (imms == 7 or imms == 15 or imms == 31) then
-      return false
-    end
-  end
-  return true
-end
-
--- Disassemble a single instruction.
-local function disass_ins(ctx)
-  local pos = ctx.pos
-  local b0, b1, b2, b3 = byte(ctx.code, pos+1, pos+4)
-  local op = bor(lshift(b3, 24), lshift(b2, 16), lshift(b1, 8), b0)
-  local operands = {}
-  local suffix = ""
-  local last, name, pat
-  local map_reg
-  ctx.op = op
-  ctx.rel = nil
-  last = nil
-  local opat
-  opat = map_init[band(rshift(op, 25), 15)]
-  while type(opat) ~= "string" do
-    if not opat then return unknown(ctx) end
-    opat = opat[band(rshift(op, opat.shift), opat.mask)] or opat._
-  end
-  name, pat = match(opat, "^([a-z0-9]*)(.*)")
-  local altname, pat2 = match(pat, "|([a-z0-9_.|]*)(.*)")
-  if altname then pat = pat2 end
-  if sub(pat, 1, 1) == "." then
-    local s2, p2 = match(pat, "^([a-z0-9.]*)(.*)")
-    suffix = suffix..s2
-    pat = p2
-  end
-
-  local rt = match(pat, "[gf]")
-  if rt then
-    if rt == "g" then
-      map_reg = band(op, 0x80000000) ~= 0 and map_regs.x or map_regs.w
-    else
-      map_reg = band(op, 0x400000) ~= 0 and map_regs.d or map_regs.s
-    end
-  end
-
-  local second0, immr
-
-  for p in gmatch(pat, ".") do
-    local x = nil
-    if p == "D" then
-      local regnum = band(op, 31)
-      x = rt and map_reg[regnum] or match_reg(p, pat, regnum)
-    elseif p == "N" then
-      local regnum = band(rshift(op, 5), 31)
-      x = rt and map_reg[regnum] or match_reg(p, pat, regnum)
-    elseif p == "M" then
-      local regnum = band(rshift(op, 16), 31)
-      x = rt and map_reg[regnum] or match_reg(p, pat, regnum)
-    elseif p == "A" then
-      local regnum = band(rshift(op, 10), 31)
-      x = rt and map_reg[regnum] or match_reg(p, pat, regnum)
-    elseif p == "B" then
-      local addr = ctx.addr + pos + parse_immpc(op, name)
-      ctx.rel = addr
-      x = "0x"..tohex(addr)
-    elseif p == "T" then
-      x = bor(band(rshift(op, 26), 32), band(rshift(op, 19), 31))
-    elseif p == "V" then
-      x = band(op, 15)
-    elseif p == "C" then
-      x = map_cond[band(rshift(op, 12), 15)]
-    elseif p == "c" then
-      local rn = band(rshift(op, 5), 31)
-      local rm = band(rshift(op, 16), 31)
-      local cond = band(rshift(op, 12), 15)
-      local invc = bxor(cond, 1)
-      x = map_cond[cond]
-      if altname and cond ~= 14 and cond ~= 15 then
-	local a1, a2 = match(altname, "([^|]*)|(.*)")
-	if rn == rm then
-	  local n = #operands
-	  operands[n] = nil
-	  x = map_cond[invc]
-	  if rn ~= 31 then
-	    if a1 then name = a1 else name = altname end
-	  else
-	    operands[n-1] = nil
-	    name = a2
-	  end
-	end
-      end
-    elseif p == "W" then
-      x = band(rshift(op, 5), 0xffff)
-    elseif p == "Y" then
-      x = band(rshift(op, 5), 0xffff)
-      local hw = band(rshift(op, 21), 3)
-      if altname and (hw == 0 or x ~= 0) then
-	name = altname
-      end
-    elseif p == "L" then
-      local rn = map_regs.x[band(rshift(op, 5), 31)]
-      local imm9 = arshift(lshift(op, 11), 23)
-      if band(op, 0x800) ~= 0 then
-	x = "["..rn..", #"..imm9.."]!"
-      else
-	x = "["..rn.."], #"..imm9
-      end
-    elseif p == "U" then
-      local rn = map_regs.x[band(rshift(op, 5), 31)]
-      local sz = band(rshift(op, 30), 3)
-      local imm12 = lshift(arshift(lshift(op, 10), 20), sz)
-      if imm12 ~= 0 then
-	x = "["..rn..", #"..imm12.."]"
-      else
-	x = "["..rn.."]"
-      end
-    elseif p == "K" then
-      local rn = map_regs.x[band(rshift(op, 5), 31)]
-      local imm9 = arshift(lshift(op, 11), 23)
-      if imm9 ~= 0 then
-	x = "["..rn..", #"..imm9.."]"
-      else
-	x = "["..rn.."]"
-      end
-    elseif p == "O" then
-      local rn, rm = map_regs.x[band(rshift(op, 5), 31)]
-      local m = band(rshift(op, 13), 1)
-      if m == 0 then
-	rm = map_regs.w[band(rshift(op, 16), 31)]
-      else
-	rm = map_regs.x[band(rshift(op, 16), 31)]
-      end
-      x = "["..rn..", "..rm
-      local opt = band(rshift(op, 13), 7)
-      local s = band(rshift(op, 12), 1)
-      local sz = band(rshift(op, 30), 3)
-      -- extension to be applied
-      if opt == 3 then
-       if s == 0 then x = x.."]"
-       else x = x..", lsl #"..sz.."]" end
-      elseif opt == 2 or opt == 6 or opt == 7 then
-	if s == 0 then x = x..", "..map_extend[opt].."]"
-	else x = x..", "..map_extend[opt].." #"..sz.."]" end
-      else
-	x = x.."]"
-      end
-    elseif p == "P" then
-      local opcv, sh = rshift(op, 26), 2
-      if opcv >= 0x2a then sh = 4 elseif opcv >= 0x1b then sh = 3 end
-      local imm7 = lshift(arshift(lshift(op, 10), 25), sh)
-      local rn = map_regs.x[band(rshift(op, 5), 31)]
-      local ind = band(rshift(op, 23), 3)
-      if ind == 1 then
-	x = "["..rn.."], #"..imm7
-      elseif ind == 2 then
-	if imm7 == 0 then
-	  x = "["..rn.."]"
-	else
-	  x = "["..rn..", #"..imm7.."]"
-	end
-      elseif ind == 3 then
-	x = "["..rn..", #"..imm7.."]!"
-      end
-    elseif p == "I" then
-      local shf = band(rshift(op, 22), 3)
-      local imm12 = band(rshift(op, 10), 0x0fff)
-      local rn, rd = band(rshift(op, 5), 31), band(op, 31)
-      if altname == "mov" and shf == 0 and imm12 == 0 and (rn == 31 or rd == 31) then
-	name = altname
-	x = nil
-      elseif shf == 0 then
-	x = imm12
-      elseif shf == 1 then
-	x = imm12..", lsl #12"
-      end
-    elseif p == "i" then
-      x = "#0x"..decode_imm13(op)
-    elseif p == "1" then
-      immr = band(rshift(op, 16), 63)
-      x = immr
-    elseif p == "2" then
-      x = band(rshift(op, 10), 63)
-      if altname then
-	local a1, a2, a3, a4, a5, a6 =
-	  match(altname, "([^|]*)|([^|]*)|([^|]*)|([^|]*)|([^|]*)|(.*)")
-	local sf = band(rshift(op, 26), 32)
-	local uns = band(rshift(op, 30), 1)
-	if prefer_bfx(sf, uns, x, immr) then
-	  name = a2
-	  x = x - immr + 1
-	elseif immr == 0 and x == 7 then
-	  local n = #operands
-	  operands[n] = nil
-	  if sf ~= 0 then
-	    operands[n-1] = gsub(operands[n-1], "x", "w")
-	  end
-	  last = operands[n-1]
-	  name = a6
-	  x = nil
-	elseif immr == 0 and x == 15 then
-	  local n = #operands
-	  operands[n] = nil
-	  if sf ~= 0 then
-	    operands[n-1] = gsub(operands[n-1], "x", "w")
-	  end
-	  last = operands[n-1]
-	  name = a5
-	  x = nil
-	elseif x == 31 or x == 63 then
-	  if x == 31 and immr == 0 and name == "sbfm" then
-	    name = a4
-	    local n = #operands
-	    operands[n] = nil
-	    if sf ~= 0 then
-	      operands[n-1] = gsub(operands[n-1], "x", "w")
-	    end
-	    last = operands[n-1]
-	  else
-	    name = a3
-	  end
-	  x = nil
-	elseif band(x, 31) ~= 31 and immr == x+1 and name == "ubfm" then
-	  name = a4
-	  last = "#"..(sf+32 - immr)
-	  operands[#operands] = last
-	  x = nil
-	elseif x < immr then
-	  name = a1
-	  last = "#"..(sf+32 - immr)
-	  operands[#operands] = last
-	  x = x + 1
-	end
-      end
-    elseif p == "3" then
-      x = band(rshift(op, 10), 63)
-      if altname then
-	local a1, a2 = match(altname, "([^|]*)|(.*)")
-	if x < immr then
-	  name = a1
-	  local sf = band(rshift(op, 26), 32)
-	  last = "#"..(sf+32 - immr)
-	  operands[#operands] = last
-	  x = x + 1
-	elseif x >= immr then
-	  name = a2
-	  x = x - immr + 1
-	end
-      end
-    elseif p == "4" then
-      x = band(rshift(op, 10), 63)
-      local rn = band(rshift(op, 5), 31)
-      local rm = band(rshift(op, 16), 31)
-      if altname and rn == rm then
-	local n = #operands
-	operands[n] = nil
-	last = operands[n-1]
-	name = altname
-      end
-    elseif p == "5" then
-      x = band(rshift(op, 16), 31)
-    elseif p == "S" then
-      x = band(rshift(op, 10), 63)
-      if x == 0 then x = nil
-      else x = map_shift[band(rshift(op, 22), 3)].." #"..x end
-    elseif p == "X" then
-      local opt = band(rshift(op, 13), 7)
-      -- Width specifier <R>.
-      if opt ~= 3 and opt ~= 7 then
-	last = map_regs.w[band(rshift(op, 16), 31)]
-	operands[#operands] = last
-      end
-      x = band(rshift(op, 10), 7)
-      -- Extension.
-      if opt == 2 + band(rshift(op, 31), 1) and
-	 band(rshift(op, second0 and 5 or 0), 31) == 31 then
-	if x == 0 then x = nil
-	else x = "lsl #"..x end
-      else
-	if x == 0 then x = map_extend[band(rshift(op, 13), 7)]
-	else x = map_extend[band(rshift(op, 13), 7)].." #"..x end
-      end
-    elseif p == "R" then
-      x = band(rshift(op,21), 3)
-      if x == 0 then x = nil
-      else x = "lsl #"..x*16 end
-    elseif p == "z" then
-      local n = #operands
-      if operands[n] == "sp" then operands[n] = "xzr"
-      elseif operands[n] == "wsp" then operands[n] = "wzr"
-      end
-    elseif p == "Z" then
-      x = 0
-    elseif p == "F" then
-      x = parse_fpimm8(op)
-    elseif p == "g" or p == "f" or p == "x" or p == "w" or
-	   p == "d" or p == "s" then
-      -- These are handled in D/N/M/A.
-    elseif p == "0" then
-      if last == "sp" or last == "wsp" then
-	local n = #operands
-	operands[n] = nil
-	last = operands[n-1]
-	if altname then
-	  local a1, a2 = match(altname, "([^|]*)|(.*)")
-	  if not a1 then
-	    name = altname
-	  elseif second0 then
-	    name, altname = a2, a1
-	  else
-	    name, altname = a1, a2
-	  end
-	end
-      end
-      second0 = true
-    else
-      assert(false)
-    end
-    if x then
-      last = x
-      if type(x) == "number" then x = "#"..x end
-      operands[#operands+1] = x
-    end
-  end
-
-  return putop(ctx, name..suffix, operands)
-end
-
-------------------------------------------------------------------------------
-
--- Disassemble a block of code.
-local function disass_block(ctx, ofs, len)
-  if not ofs then ofs = 0 end
-  local stop = len and ofs+len or #ctx.code
-  ctx.pos = ofs
-  ctx.rel = nil
-  while ctx.pos < stop do disass_ins(ctx) end
-end
-
--- Extended API: create a disassembler context. Then call ctx:disass(ofs, len).
-local function create(code, addr, out)
-  local ctx = {}
-  ctx.code = code
-  ctx.addr = addr or 0
-  ctx.out = out or io.write
-  ctx.symtab = {}
-  ctx.disass = disass_block
-  ctx.hexdump = 8
-  return ctx
-end
-
--- Simple API: disassemble code (a string) at address and output via out.
-local function disass(code, addr, out)
-  create(code, addr, out):disass()
-end
-
--- Return register name for RID.
-local function regname(r)
-  if r < 32 then return map_regs.x[r] end
-  return map_regs.d[r-32]
-end
-
--- Public module functions.
-return {
-  create = create,
-  disass = disass,
-  regname = regname
-}
-