void add()
{
match('+');
term();
emitLine("pop %rbx");
emitLine("add %rbx, %rax");
}
void init()
{
getChar();
emitLine(".text");
emitLine(".globl _start");
emitLine("_start:");
}
void multiply()
{
match('*');
factor();
emitLine("pop %rbx");
emitLine("mul %rbx");
}
void subtract()
{
match('-');
term();
emitLine("pop %rbx");
emitLine("sub %rbx, %rax");
emitLine("neg %rax");
}
void emitHead()
{
emitComment(fileName);
sprintf(buffer, ".class public %s", className);
emitLine(buffer);
emitLine(".super java/lang/Object");
emitLineBreak();
return;
}
void divide()
{
match('/');
factor();
emitLine("pop %rdx");
emitLine("mov %rax, %rbx");
emitLine("mov %rdx, %rax");
emitLine("xor %rdx, %rdx");
emitLine("div %rbx");
}
void assignment()
{
char* name = getName();
char string[80];
match('=');
expression();
snprintf(string, 80, ".comm %s,4,4", name);
emitLine(string);
snprintf(string, 80, "lea %s(%%rip), %%rbx", name);
emitLine(string);
emitLine("mov %rax, (%rbx)");
free(name);
}
//--------------------------------------------------------------
void AnimationLinesFF::onNewPacket(DevicePacket* pDevicePacket, string deviceId, float x, float y)
{
accumulateVolume(pDevicePacket->m_volume, deviceId);
m_lastPacketColor = pDevicePacket->m_color;
if (pDevicePacket->m_volume >= m_volValuesMeanTh)
{
emitLine(deviceId);
}
}
void expression()
{
if(isaddop(look))
emitLine("xor %rax, %rax");
else
term();
while(isaddop(look))
{
emitLine("push %rax");
switch(look)
{
case '+':
add();
break;
case '-':
subtract();
break;
default:
expected("addop");
break;
}
}
}
void identify()
{
char* name = getName();
char string[80];
if(look == '(')
{
match('(');
match(')');
snprintf(string, 80, "jmp %s", name);
}
else
{
snprintf(string, 80, "mov %s(%%rip), %%rax", name);
}
emitLine(string);
free(name);
}
void factor()
{
if(look == '(')
{
match('(');
expression();
match(')');
}
else if(isalpha(look))
{
identify();
}
else
{
char string[80];
snprintf(string, 80, "mov $%s, %%rax", getNum());
emitLine(string);
}
}
void term()
{
factor();
while(ismulop(look))
{
emitLine("push %rax");
switch(look)
{
case '*':
multiply();
break;
case '/':
divide();
break;
default:
expected("mulop");
break;
}
}
}
void CodeGenerator::generateCode(std::ostream *os_) {
os = os_;
emitLine(std::string("#include \"node.h\""));
emitLine(std::string("#include \"stltree.h\""));
emitLine(std::string(""));
emitLine(std::string("void stltree_create(stltree *t) {"));
indent();
ast->root->codeGen(*this);
emitLine(std::string("t->root = n") + ast->root->id() + std::string(";"));
deindent();
emitLine(std::string("}"));
}
void Output::postLabel(std::string label)
{
emitLine(label + ":");
}
void finish()
{
emitLine("mov %rax, %rdi");
emitLine("mov $60, %rax");
emitLine("syscall");
}