From 1014598c02e9635d9d4a008010d43c3c0b845e06 Mon Sep 17 00:00:00 2001
From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Sun, 14 Oct 2012 23:42:59 +0200
Subject: [PATCH] handle compare/jump instructions in script assembler

---
 src/loader/Interpreter.cpp | 137 +++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)

diff --git a/src/loader/Interpreter.cpp b/src/loader/Interpreter.cpp
index bd7473a..6bb022f 100644
--- a/src/loader/Interpreter.cpp
+++ b/src/loader/Interpreter.cpp
@@ -420,6 +420,58 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
 			if (i == end) {
 				throw Error("unexpected script end after rand");
 			}
+		} else if (cmd == "cmp") {
+			++i;
+			if (i == end) {
+				throw Error("unexpected script end after cmp");
+			}
+			size += sizeof(int);
+			++i;
+			if (i == end) {
+				throw Error("unexpected script end after cmp");
+			}
+		} else if (cmd == "jmp") {
+			size += sizeof(int);
+			++i;
+			if (i == end) {
+				throw Error("unexpected script end after cmp");
+			}
+		} else if (cmd == "jeq") {
+			size += sizeof(int);
+			++i;
+			if (i == end) {
+				throw Error("unexpected script end after cmp");
+			}
+		} else if (cmd == "jne") {
+			size += sizeof(int);
+			++i;
+			if (i == end) {
+				throw Error("unexpected script end after cmp");
+			}
+		} else if (cmd == "jl") {
+			size += sizeof(int);
+			++i;
+			if (i == end) {
+				throw Error("unexpected script end after cmp");
+			}
+		} else if (cmd == "jle") {
+			size += sizeof(int);
+			++i;
+			if (i == end) {
+				throw Error("unexpected script end after cmp");
+			}
+		} else if (cmd == "jg") {
+			size += sizeof(int);
+			++i;
+			if (i == end) {
+				throw Error("unexpected script end after cmp");
+			}
+		} else if (cmd == "jge") {
+			size += sizeof(int);
+			++i;
+			if (i == end) {
+				throw Error("unexpected script end after cmp");
+			}
 		} else if (cmd == "sysc") {
 
 		} else {
@@ -530,6 +582,91 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
 			} else {
 				throw Error("unexpected register " + reg);
 			}
+		} else if (cmd == "cmp") {
+			++i;
+			const string &reg((*i)->RegisterName());
+			++i;
+			if (reg == "i0") {
+				if ((*i)->GetType() == ScriptToken::REGISTER && (*i)->RegisterName() == "i1") {
+					text[cursor] = Script::CODE_CMP_I0_I1;
+					++cursor;
+				} else {
+					text[cursor] = Script::CODE_CMP_I0;
+					++cursor;
+					ReadScriptInteger(**i, text + cursor);
+					cursor += sizeof(int);
+				}
+			} else if (reg == "i1") {
+				text[cursor] = Script::CODE_CMP_I1;
+				++cursor;
+				ReadScriptInteger(**i, text + cursor);
+				cursor += sizeof(int);
+			} else {
+				throw Error("cannot use " + reg + " as lhs for comparison");
+			}
+		} else if (cmd == "jmp") {
+			text[cursor] = Script::CODE_JUMP;
+			++cursor;
+			++i;
+			if (!labels.count((*i)->Identifier())) {
+				throw Error("use of undefined label " + (*i)->Identifier());
+			}
+			*reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
+			cursor += sizeof(int);
+		} else if (cmd == "jeq") {
+			text[cursor] = Script::CODE_JUMP_EQUAL;
+			++cursor;
+			++i;
+			if (!labels.count((*i)->Identifier())) {
+				throw Error("use of undefined label " + (*i)->Identifier());
+			}
+			*reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
+			cursor += sizeof(int);
+		} else if (cmd == "jne") {
+			text[cursor] = Script::CODE_JUMP_NOT_EQUAL;
+			++cursor;
+			++i;
+			if (!labels.count((*i)->Identifier())) {
+				throw Error("use of undefined label " + (*i)->Identifier());
+			}
+			*reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
+			cursor += sizeof(int);
+		} else if (cmd == "jl") {
+			text[cursor] = Script::CODE_JUMP_LESS;
+			++cursor;
+			++i;
+			if (!labels.count((*i)->Identifier())) {
+				throw Error("use of undefined label " + (*i)->Identifier());
+			}
+			*reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
+			cursor += sizeof(int);
+		} else if (cmd == "jle") {
+			text[cursor] = Script::CODE_JUMP_LESS_EQUAL;
+			++cursor;
+			++i;
+			if (!labels.count((*i)->Identifier())) {
+				throw Error("use of undefined label " + (*i)->Identifier());
+			}
+			*reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
+			cursor += sizeof(int);
+		} else if (cmd == "jg") {
+			text[cursor] = Script::CODE_JUMP_GREATER;
+			++cursor;
+			++i;
+			if (!labels.count((*i)->Identifier())) {
+				throw Error("use of undefined label " + (*i)->Identifier());
+			}
+			*reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
+			cursor += sizeof(int);
+		} else if (cmd == "jge") {
+			text[cursor] = Script::CODE_JUMP_GREATER_EQUAL;
+			++cursor;
+			++i;
+			if (!labels.count((*i)->Identifier())) {
+				throw Error("use of undefined label " + (*i)->Identifier());
+			}
+			*reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
+			cursor += sizeof(int);
 		} else if (cmd == "sysc") {
 			text[cursor] = Script::CODE_SYSCALL;
 			++cursor;
-- 
2.39.2