jaroslav@1858: /**
jaroslav@1858:  * Back 2 Browser Bytecode Translator
jaroslav@1858:  * Copyright (C) 2012-2015 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@1858:  *
jaroslav@1858:  * This program is free software: you can redistribute it and/or modify
jaroslav@1858:  * it under the terms of the GNU General Public License as published by
jaroslav@1858:  * the Free Software Foundation, version 2 of the License.
jaroslav@1858:  *
jaroslav@1858:  * This program is distributed in the hope that it will be useful,
jaroslav@1858:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
jaroslav@1858:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
jaroslav@1858:  * GNU General Public License for more details.
jaroslav@1858:  *
jaroslav@1858:  * You should have received a copy of the GNU General Public License
jaroslav@1858:  * along with this program. Look for COPYING file in the top folder.
jaroslav@1858:  * If not, see http://opensource.org/licenses/GPL-2.0.
jaroslav@1858:  */
jaroslav@1858: package org.apidesign.vm4brwsr;
jaroslav@1858: 
jaroslav@1858: final class NumberOperations {
jaroslav@1858:     private static final int DIV32 = 1;
jaroslav@1858:     private static final int MOD32 = 2;
jaroslav@1858:     private static final int MUL32 = 4;
jaroslav@1865:     private static final int BIT64 = 8;
jaroslav@1858: 
jaroslav@1858:     private int used;
jaroslav@1858: 
jaroslav@1858:     public String mul32() {
jaroslav@1858:         used |= MUL32;
jaroslav@1858:         return "__mul32(@1,@2)";
jaroslav@1858:     }
jaroslav@1858:     public String div32() {
jaroslav@1858:         used |= DIV32;
jaroslav@1858:         return "__div32(@1,@2)";
jaroslav@1858:     }
jaroslav@1858: 
jaroslav@1858:     public String mod32() {
jaroslav@1858:         used |= MOD32;
jaroslav@1858:         return "__mod32(@1,@2)";
jaroslav@1858:     }
jaroslav@1858: 
jaroslav@1862:     public String add64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__add64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String sub64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__sub64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String mul64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__mul64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String div64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__div64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String mod64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__mod64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String and64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__and64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String or64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__or64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String xor64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__xor64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String neg64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__neg64(@1)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String shl64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__shl64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String shr64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__shr64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String ushr64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1865:         return "__ushr64(@1,@2)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1862:     public String compare64() {
jaroslav@1865:         used |= BIT64;
jaroslav@1871:         return "__compare64(@2,@1)";
jaroslav@1862:     }
jaroslav@1862: 
jaroslav@1858:     public String generate() {
jaroslav@1858:         if (used == 0) {
jaroslav@1858:             return "";
jaroslav@1858:         }
jaroslav@1858:         StringBuilder sb = new StringBuilder();
jaroslav@1858:         if ((used & MUL32) != 0) {
jaroslav@1858:             sb.append(
jaroslav@1858:                 "    __mul32 = function(x, y) {\n" +
jaroslav@1858:                 "        return (((x * (y >> 16)) << 16) + x * (y & 0xFFFF)) | 0;\n" +
jaroslav@1858:                 "    };\n" +
jaroslav@1858:                 ""
jaroslav@1858:             );
jaroslav@1858:         }
jaroslav@1858:         if ((used & (MOD32 | DIV32)) != 0) {
jaroslav@1858:             sb.append(
jaroslav@1858:                 "    function __handleDivByZero() {\n" +
jaroslav@1858:                 "        var exception = new vm.java_lang_ArithmeticException;\n" +
jaroslav@1858:                 "        vm.java_lang_ArithmeticException(false).constructor\n" +
jaroslav@1858:                 "          .cons__VLjava_lang_String_2.call(exception, \"/ by zero\");\n" +
jaroslav@1858:                 "\n" +
jaroslav@1858:                 "        throw exception;\n" +
jaroslav@1858:                 "    }\n" +
jaroslav@1858:                 ""
jaroslav@1858:             );
jaroslav@1858:         }
jaroslav@1858:         if ((used & MOD32) != 0) {
jaroslav@1858:             sb.append(
jaroslav@1858:                 "    function __mod32(x, y) {\n" +
jaroslav@1858:                 "        if (y === 0) __handleDivByZero();\n" +
jaroslav@1858:                 "        return (x % y) | 0;\n" +
jaroslav@1858:                 "    }\n" +
jaroslav@1858:                 ""
jaroslav@1858:             );
jaroslav@1858:         }
jaroslav@1858:         if ((used & DIV32) != 0) {
jaroslav@1858:             sb.append(
jaroslav@1858:                 "    function __div32(x, y) {\n" +
jaroslav@1858:                 "        if (y === 0) __handleDivByZero();\n" +
jaroslav@1858:                 "        return (x / y) | 0;\n" +
jaroslav@1858:                 "    }\n" +
jaroslav@1858:                 ""
jaroslav@1858:             );
jaroslav@1858:         }
jaroslav@1865:         if ((used & BIT64) != 0) {
jaroslav@1865:             sb.append(
jaroslav@1866:                 "    var __add64 = Number.prototype['__bit64']['add64'];\n" +
jaroslav@1866:                 "    var __sub64 = Number.prototype['__bit64']['sub64'];\n" +
jaroslav@1866:                 "    var __mul64 = Number.prototype['__bit64']['mul64'];\n" +
jaroslav@1866:                 "    var __div64 = Number.prototype['__bit64']['div64'];\n" +
jaroslav@1866:                 "    var __mod64 = Number.prototype['__bit64']['mod64'];\n" +
jaroslav@1866:                 "    var __and64 = Number.prototype['__bit64']['and64'];\n" +
jaroslav@1866:                 "    var __or64 = Number.prototype['__bit64']['or64'];\n" +
jaroslav@1866:                 "    var __xor64 = Number.prototype['__bit64']['xor64'];\n" +
jaroslav@1870:                 "    var __neg64 = Number.prototype['__bit64']['neg64'];\n" +
jaroslav@1866:                 "    var __shl64 = Number.prototype['__bit64']['shl64'];\n" +
jaroslav@1866:                 "    var __shr64 = Number.prototype['__bit64']['shr64'];\n" +
jaroslav@1866:                 "    var __ushr64 = Number.prototype['__bit64']['ushr64'];\n" +
jaroslav@1866:                 "    var __compare64 = Number.prototype['__bit64']['compare64'];\n" +
jaroslav@1865:                 ""
jaroslav@1865:             );
jaroslav@1865:         }
jaroslav@1858:         return sb.toString();
jaroslav@1858:     }
jaroslav@1858: }