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annotate cbackend.js @ 35:bf5e88f6419d

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Use a function/method call strategy that actually works
author Mike Pavone <pavone@retrodev.com>
date Mon, 09 Jul 2012 21:32:28 -0700
parents a10f1b049193
children a6bf4869fcbe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 var mainModule;
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2 var modules = {};
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3
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4 var nextmethodId = 0;
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5 var methodIds = {};
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6 function getMethodId(methodName)
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7 {
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8 if (!(methodName in methodIds)) {
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9 methodIds[methodName] = nextmethodId++;
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10
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11 }
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12 return methodIds[methodName];
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13 }
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14
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15 function importSym(obj, src, key)
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16 {
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17 if(!(key in src)) {
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18 throw new Error(key +' not found in source object for import');
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19 }
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20 if(key in obj) {
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21 throw new Error(key +' already exists in target object for import')
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22 }
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23 obj[key] = src[key];
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24 }
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25
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26 function doImport(obj, src, symlist)
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27 {
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28 if (symlist === undefined) {
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29 each(src, function(key,val) {
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30 if (key != 'parent') {
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31 importSym(obj, src, key);
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32 }
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33 });
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34 } else {
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35 for (var i = 0; i < symlist.length; ++i) {
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36 importSym(obj, src, symlist[i]);
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37 }
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38 }
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39 return obj;
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40 }
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41
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42 op.prototype.toC = function(isReceiver) {
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43 var optoMeth = {'+': 'ADD_', '-': 'SUB_', '*': 'MUL_', '/': 'DIV_', '=': 'EQ_', '!=': 'NEQ_', '<': 'LT_', '>': 'GT_', '>=': 'GEQ_', '<=': 'LEQ_'};
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44 var method = optoMeth[this.op];
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45 return 'mcall(' + getMethodId(method) + ', 2, ' + this.left.toC() + ', ' + this.right.toC() + ')\n';
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46 };
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47
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48 function escapeCName(name)
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49 {
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50 if (name == 'self') {
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51 return name;
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52 }
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53 name = name.replace("_", "UN_").replace(":", "CN_").replace("!", "EX_").replace('?', 'QS_').replace('@', 'AT_');
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54 name = 'tp_' + name;
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55 return name;
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56 }
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57
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58 symbol.prototype.toC = function() {
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59 var name = this.cleanName();
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60 var info = this.symbols.find(name);
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61 if (!info) {
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62 throw new Error('symbol ' + name + ' not found');
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63 }
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64 var pre = '';
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65 switch(info.type) {
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66 case 'self':
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67 pre = 'self->';
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68 break;
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69 case 'parent':
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70 pre = 'self->';
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71 for (var i = 0; i < info.depth; ++i) {
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72 pre += 'parent->';
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73 }
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74 break;
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75 case 'upvar':
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76 pre = 'env->';
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77 for (var i = 1; i < info.depth; ++i) {
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78 pre += 'parent->';
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79 }
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80 break;
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81 case 'toplevel':
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82 pre = 'modules.';
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83 modules[name] = false;
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84 break;
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85 case 'closedover':
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86 pre = 'myenv->';
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87 }
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88 return pre + escapeCName(name);
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89 }
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90
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91 var declaredInts = {};
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92
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93 intlit.prototype.toC = function() {
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94 var str = this.val.toString();
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95 if (!(this.val in declaredInts)) {
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96 toplevelcode += 'obj_int32 int32_' + str + ' = {{&obj_int32_meta, NULL}, ' + str + '};\n';
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97 declaredInts[this.val] = true;
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98 }
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99 return '((object *)&int32_' + str + ')';
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100 }
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101
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102 floatlit.prototype.toC = function() {
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103 return 'make_float(' + this.val.toString() + ')';
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104 }
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105
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106 strlit.prototype.toC = function() {
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107 return 'make_str("' + this.val.replace('\\', '\\\\').replace('"', '\\"').replace('\n', '\\n').replace('\r', '\\r') + '")';
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108 }
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109
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110 listlit.prototype.toC = function() {
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111 var ret = 'make_list(';
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112 each(this.val, function(idx, el) {
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113 ret += (idx ? ', ' : '') + el.toC();
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114 });
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115 return ret + ')';
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116 }
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117
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118 funcall.prototype.toC = function() {
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119 var name = this.name[this.name.length-1] == ':' ? this.name.substr(0, this.name.length-1) : this.name;
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120 if (name == 'foreign') {
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121 if ((this.args[0] instanceof lambda) || (this.args[0] instanceof object)) {
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122 return null;
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123 } else if(this.args[0] instanceof symbol) {
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124 return this.args[0].name;
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125 } else {
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126 throw new Error("Unexpected AST type for foreign:");
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127 }
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128 }
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129 var args = this.args.slice(0, this.args.length);
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130 if (this.receiver) {
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131 args.splice(0, 0, this.receiver);
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132 }
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133 var method = false;
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134 var funinfo = this.symbols.find(name);
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135 if (!funinfo || funinfo.def instanceof setter) {
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136 method = true;
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137 } else {
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138 switch(funinfo.type)
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139 {
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140 case 'self':
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141 if (args.length < funinfo.def.args.length || funinfo.def.args[0].name != 'self') {
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142 args.splice(0, 0, new symbol('self', this.symbols));
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143 } else {
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144 args.splice(0, 1);
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145 }
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146 method = true;
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147 break;
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148 case 'parent':
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149 ret = 'self';
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150 for (var i = 0; i < funinfo.depth; ++i) {
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151 ret += '->parent';
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152 }
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153 break;
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154 }
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155 }
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156 for (var i in args) {
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157 args[i] = ', ' + args[i].toC();
31
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158 }
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159 var callpart;
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160 if (method) {
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161 callpart = 'mcall(' + getMethodId(name);
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162 } else {
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163 callpart = 'ccall(' + escapeCName(name);
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164 }
35
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165 return callpart + ', ' + args.length + args.join('') + ')';
31
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166 }
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167
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168 function cObject(name) {
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169 this.name = name;
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170 this.slots = {};
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171 this.properties = [];
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172 this.values = [];
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diff changeset
173 this.slotvars = {};
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174 }
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175
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176 cObject.prototype.addMessage = function(msgname, implementation) {
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177 var methodid = getMethodId(msgname);
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178 var trunc = methodid & 0xF;
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179 if (!(trunc in this.slots)) {
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180 this.slots[trunc] = [];
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181 }
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182 this.slots[trunc].push([methodid, implementation, msgname]);
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183 }
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184
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185 cObject.prototype.addProperty = function(propname, value, type) {
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186 if (type != undefined) {
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187 this.properties.push([propname, type]);
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188 } else {
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189 var escaped = escapeCName(propname);
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190 this.addMessage(propname, 'va_end(args); return self->' + escaped + ';');
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191 this.addMessageVar(propname + '!', 'setval', 'object *');
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192 this.addMessage(propname + '!', 'setval = va_arg(args, object *); va_end(args); self->' + escaped + ' = setval; return (object *)self;');
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193 this.properties.push(escaped);
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194 this.values.push(value);
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195 }
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196 }
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197
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198 cObject.prototype.addMessageVar = function(msgname, varname, type) {
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199 var trunc = getMethodId(msgname) & 0xF;
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200 if (!(trunc in this.slotvars)) {
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diff changeset
201 this.slotvars[trunc] = {};
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202 }
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203 this.slotvars[trunc][varname] = type;
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204 }
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205
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206 cObject.prototype.toEarlyCDef = function() {
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207 var objdef = 'typedef struct {\n\tobject header;\n';
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208 for (var i in this.properties) {
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209 if (this.properties[i] instanceof Array) {
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210 objdef += '\t' + this.properties[i][1] + ' ' + this.properties[i][0] + ';\n';
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211 } else {
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212 objdef += '\tobject * ' + this.properties[i] + ';\n'
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213 }
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214 }
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215 objdef += '} ' + this.name + ';\nobj_meta ' + this.name + '_meta;\n';
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216 return objdef;
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217 }
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218
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219 cObject.prototype.toCDef = function() {
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220 var slotdefs = '';
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221 var metadef = 'obj_meta ' + this.name + '_meta = {sizeof(' + this.name +'), {';
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222 for (var i = 0; i < 16; i++) {
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223 if (i) {
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224 metadef += ', ';
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225 }
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226 if (i in this.slots) {
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diff changeset
227 slotdefs += 'object * ' + this.name + '_slot_' + i + '(uint32_t method_id, uint32_t num_params, object * oself, va_list args) {\n\t' +
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228 this.name + ' *self = (' + this.name + ' *)oself;\n';
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229 for (var varname in this.slotvars[i]) {
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230 slotdefs += '\t' + this.slotvars[i][varname] + ' ' + varname + ';\n';
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231 }
31
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232 if (this.slots[i].length == 1) {
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233 slotdefs += '\tif (method_id == ' + this.slots[i][0][0] + ') { /* ' + this.slots[i][0][2] + '*/\n' +
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234 '\t\t' + this.slots[i][0][1] + '\n' +
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235 '\t}\n' +
35
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diff changeset
236 '\treturn no_impl(method_id, num_params, (object *)self, args);\n}\n';
31
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237 } else {
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238 slotdefs += '\tswitch(method_id) {\n';
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239 for (j in this.slots[i]) {
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240 slotdefs += '\t\tcase ' + this.slots[i][j][0] + ': /* ' + this.slots[i][j][2] + '*/\n' +
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241 '\t\t\t' + this.slots[i][j][1] + '\n';
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242 }
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243 slotdefs += '\t\tdefault:\n' +
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244 '\treturn no_impl(method_id, num_params, params, args);\n}\n';
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245 }
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246 metadef += this.name + '_slot_' + i;
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247 } else {
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248 metadef += 'no_impl';
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249 }
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250 }
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251 metadef += '}};\n';
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252 return slotdefs + metadef;
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253 }
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254
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255 cObject.prototype.toCInstance = function() {
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256 return 'make_object(&' + this.name + '_meta, NULL, ' + this.values.length + (this.values.length ? ', ' : '') + this.values.join(', ') + ')';
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257 }
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258
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259 var nextobject = 0;
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260
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261 object.prototype.toC = function() {
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262 var messages = this.messages;
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263 var values = [];
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264 var imports = []
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265 var me = new cObject('object_' + nextobject++);
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266 for (var i in messages) {
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267 if (messages[i] instanceof funcall) {
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268 if (messages[i].name == 'import:' && messages[i].args.length == 1) {
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269 imports.push({symbols: false, src: messages[i].args[0]});
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270 } else if(messages[i].name == 'import:from:' && messages[i].args.length == 2) {
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271 var importsyms = [];
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272 each(messages[i].args[0].val, function(i, el) {
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273 if (!(el instanceof symbol)) {
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274 throw new Error('Names in import:from statement must be symbols');
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275 }
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276 importsyms.push(new strlit(el.name));
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277 });
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278 imports.push({symbols: new listlit(importsyms), src: messages[i].args[1]});
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279 } else {
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280 throw new Error('Only import and import:from calls allowed in object context');
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281 }
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282 } else {
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283 messages[i].toCObject(me);
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284 }
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285 }
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286 forwarddec += me.toEarlyCDef();
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287 toplevelcode += me.toCDef();
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288 return me.toCInstance();
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289 }
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290
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291 var toplevelcode;
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292 var forwarddec;
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293
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294 function makeCProg(obj)
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diff changeset
295 {
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296 var int32 = new cObject('obj_int32');
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297 int32.addProperty('num', null, 'int32_t');
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298 int32.addMessageVar('ADD_', 'ret', 'obj_int32 *');
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diff changeset
299 int32.addMessageVar('ADD_', 'argb', 'obj_int32 *');
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diff changeset
300 int32.addMessage('ADD_', 'argb = va_arg(args, obj_int32 *); ret = (obj_int32 *)make_object(&obj_int32_meta, NULL, 0); ret->num = self->num + argb->num; return ret;');
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diff changeset
301 int32.addMessageVar('SUB_', 'ret', 'obj_int32 *');
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diff changeset
302 int32.addMessageVar('SUB_', 'argb', 'obj_int32 *');
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diff changeset
303 int32.addMessage('SUB_', 'argb = va_arg(args, obj_int32 *); ret = (obj_int32 *)make_object(&obj_int32_meta, NULL, 0); ret->num = self->num - argb->num; return ret;');
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diff changeset
304 int32.addMessageVar('LT_', 'argb', 'obj_int32 *');
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diff changeset
305 int32.addMessage('LT_', 'argb = va_arg(args, obj_int32 *); if (self->num < argb->num) { return mcall(METHOD_ID_TRUE, 1, main_module); } return mcall(METHOD_ID_FALSE, 1, main_module);');
31
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306 forwarddec = toplevelcode = '';
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diff changeset
307 forwarddec += int32.toEarlyCDef();
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308 toplevelcode += int32.toCDef();
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309 obj.populateSymbols(toplevel);
34
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310 var rest = 'object * mainModule() {\n\tmain_module = ' + obj.toC() + ';\n\treturn main_module;\n}\n';
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diff changeset
311 return '#include "runtime/proghead.inc"\n' +
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diff changeset
312 '#define METHOD_ID_MAIN ' + getMethodId('main') + '\n' +
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313 '#define METHOD_ID_TRUE ' + getMethodId('true') + '\n' +
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314 '#define METHOD_ID_FALSE ' + getMethodId('false') + '\n' +
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315 forwarddec + toplevelcode + rest + '#include "runtime/progfoot.inc"\n';
31
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316 }
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317
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318 object.prototype.toCModule = function() {
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319 return makeCProg(this);
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320 }
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321
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322 var lambdanum = 0;
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323
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324 lambda.prototype.toC = function() {
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325 var args = this.args ? this.args.slice(0, this.args.length) : [];
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326 var exprs = this.expressions;
34
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diff changeset
327 var mynum = lambdanum++;
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diff changeset
328 if (Object.keys(this.symbols.closedover).length) {
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diff changeset
329 this.symbols.envtype = 'lambda_' + mynum + '_env';
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diff changeset
330 }
31
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331 if (this.selftype) {
34
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diff changeset
332 this.symbols.defineVar('self', this.selftype);
31
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333 if (args[0] && args[0].cleanName() == 'self') {
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334 args.splice(0, 1);
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335 }
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diff changeset
336 var offset = 1;
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diff changeset
337 } else {
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338 var offset = 0;
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diff changeset
339 }
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340 for (var i = 0; i < args.length; ++i) {
34
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diff changeset
341 var argname = args[i].toC();
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342
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343 args[i] = (argname.indexOf('->') < 0 ? '\tobject * ' : '\t') + argname + ' = va_arg(args, object *);\n';
31
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344 }
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345 var compiled = []
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346 for (var i in exprs) {
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347 var js = exprs[i].toC();
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348 if (js) {
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349 compiled.push(indent(js));
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350 }
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351 }
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352 exprs = compiled;
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353 if (exprs.length) {
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354 exprs[exprs.length-1] = 'return ' + exprs[exprs.length-1] + ';';
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355 }
34
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diff changeset
356
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diff changeset
357 if (Object.keys(this.symbols.closedover).length) {
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diff changeset
358 forwarddec += 'typedef struct {\n';
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diff changeset
359 for (var varname in this.symbols.closedover) {
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diff changeset
360 forwarddec += '\tobject * ' + escapeCName(varname) + ';\n';
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diff changeset
361 }
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diff changeset
362 forwarddec += '} lambda_' + mynum + '_env;\n'
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diff changeset
363
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diff changeset
364 var myenvinit = '\tlambda_' + mynum + '_env * myenv = malloc(sizeof(lambda_' + mynum + '_env));\n';
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diff changeset
365 this.symbols.envtype = 'lambda_' + mynum + '_env';
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diff changeset
366 } else {
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diff changeset
367 var myenvinit = '';
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diff changeset
368 }
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diff changeset
369
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diff changeset
370 toplevelcode += 'object * lambda_' + mynum + ' (' + this.symbols.parentEnvType() + ' * env, uint32_t num_args, ...) {\n\tva_list args;\n' + myenvinit + '\tva_start(args, num_args);\n';
31
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371 if (this.selftype) {
34
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diff changeset
372 var selfvar = (new symbol('self', this.symbols)).toC();
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diff changeset
373 if (selfvar == 'self') {
35
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diff changeset
374 toplevelcode += '\t' + this.selftype + ' * self = va_arg(args, ' + this.selftype + ' *);\n';
34
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diff changeset
375 } else {
35
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diff changeset
376 toplevelcode += '\t' + selfvar + ' = va_arg(args, ' + this.selftype + ' *);\n';
34
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diff changeset
377 }
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diff changeset
378
31
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379 }
35
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diff changeset
380 toplevelcode += args.join('') + '\tva_end(args);\n' + exprs.join(';\n\t') + '\n}\n';
34
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diff changeset
381
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diff changeset
382 if (this.symbols.parentEnvType() != 'void') {
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diff changeset
383 if (this.symbols.passthruenv) {
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diff changeset
384 var envvar = 'env';
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diff changeset
385 } else {
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diff changeset
386 var envvar = 'myenv';
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diff changeset
387 }
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diff changeset
388 return 'make_closure(' + envvar + ', lambda_' + mynum + ')';
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diff changeset
389 } else {
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diff changeset
390 toplevelcode += 'closure lambda_obj_' + mynum + ' = {{&lambda_meta, NULL}, NULL, lambda_' + mynum + '};\n';
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diff changeset
391 return '((object *)&lambda_obj_' + mynum + ')';
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diff changeset
392 }
31
668f533e5284 Add initial version of C backend
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393 };
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diff changeset
394 lambda.prototype.toCObject = function(typename) {
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diff changeset
395 this.selftype = typename;
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diff changeset
396 return this.toC();
668f533e5284 Add initial version of C backend
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parents:
diff changeset
397 };
668f533e5284 Add initial version of C backend
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
398 lambda.prototype.toCModule = function() {
668f533e5284 Add initial version of C backend
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parents:
diff changeset
399 return makeCProg(this);
668f533e5284 Add initial version of C backend
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parents:
diff changeset
400 }
668f533e5284 Add initial version of C backend
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parents:
diff changeset
401
668f533e5284 Add initial version of C backend
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parents:
diff changeset
402 assignment.prototype.toC = function() {
668f533e5284 Add initial version of C backend
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parents:
diff changeset
403 var existing = this.symbols.find(this.symbol.name);
668f533e5284 Add initial version of C backend
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
404 var prefix = '';
668f533e5284 Add initial version of C backend
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
405 if (!existing) {
668f533e5284 Add initial version of C backend
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parents:
diff changeset
406 prefix = 'object * ';
668f533e5284 Add initial version of C backend
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parents:
diff changeset
407 }
668f533e5284 Add initial version of C backend
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
408 var val = this.expression.toC();
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diff changeset
409 if (val === null) {
668f533e5284 Add initial version of C backend
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parents:
diff changeset
410 return null;
668f533e5284 Add initial version of C backend
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
411 }
668f533e5284 Add initial version of C backend
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parents:
diff changeset
412 return prefix + this.symbol.toC() + ' = ' + val;
668f533e5284 Add initial version of C backend
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parents:
diff changeset
413 };
668f533e5284 Add initial version of C backend
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diff changeset
414 assignment.prototype.toCObject = function(cobj) {
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parents:
diff changeset
415 if (this.expression.toCObject) {
668f533e5284 Add initial version of C backend
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parents:
diff changeset
416 var val = this.expression.toCObject(cobj.name);
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diff changeset
417 } else {
668f533e5284 Add initial version of C backend
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diff changeset
418 var val = this.expression.toC();
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parents:
diff changeset
419 }
668f533e5284 Add initial version of C backend
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parents:
diff changeset
420 if (val === null) {
668f533e5284 Add initial version of C backend
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parents:
diff changeset
421 return;
668f533e5284 Add initial version of C backend
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parents:
diff changeset
422 }
668f533e5284 Add initial version of C backend
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
423 if (this.expression instanceof lambda) {
35
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diff changeset
424 var params = ['((object *)self)'];
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diff changeset
425 var paramget = '';
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diff changeset
426 for (var i in this.expression.args) {
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diff changeset
427 var escaped = escapeCName(this.expression.args[i].cleanName());
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diff changeset
428 if (escaped != 'self') {
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diff changeset
429 cobj.addMessageVar(this.symbol.name, escaped, 'object *');
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diff changeset
430 params.push(escaped);
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diff changeset
431 paramget += escaped + ' = va_arg(args, object *); ';
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diff changeset
432 }
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diff changeset
433 }
bf5e88f6419d Use a function/method call strategy that actually works
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diff changeset
434 cobj.addMessage(this.symbol.name, paramget + 'return ccall(' + val + ', ' + params.length + (params.length ? ', ' : '') + params.join(', ') + ');');
31
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diff changeset
435 } else {
668f533e5284 Add initial version of C backend
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parents:
diff changeset
436 cobj.addProperty(this.symbol.name, val);
668f533e5284 Add initial version of C backend
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parents:
diff changeset
437 }
668f533e5284 Add initial version of C backend
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diff changeset
438 };