public string Visit(CIL_StrStr node)
{
var code_result = "";
var stringref = context_function[node.StrId];
var destiny = context_function[node.Result];
code_result += $"\t lw $t0 {stringref}\n";
code_result += $"\t lw $t0 0($t0)\n";
code_result += $"\t addi $t0 $t0 -8\n";
//I
code_result += $"\t lw $t1 {context_function[node.I]}\n";
//L
code_result += $"\t lw $t2 {context_function[node.L]}\n";
//L+I inside?
code_result += $"\t lw $t3 {stringref}\n";
code_result += $"\t move $a0 $t1\n";
code_result += $"\t add $a0 $a0 $t2\n";
code_result += $"\t sle $t4, $a0, $t0\n";
code_result += $"\t la $a0 error_indexout\n";
code_result += $"\t beq $t4, $zero, exception\n";
code_result += $"\t lw $t0 {stringref}\n";
code_result += $"\t lw $t0 0($t0)\n";
code_result += $"\t lw $t3 {stringref}\n";
code_result += $"\t li $a0 0\n";
code_result += $"\t addi $a0 $t2 0\n";
//branch para la excepttion
//copy the substring
//allocate first
code_result += $"\t addi $a0 $a0 8\n";
code_result += $"\t li $v0 9\n";
code_result += $"\t syscall\n"; // allocate
code_result += $"\t sw $v0 {context_function[node.Result]}\n";
code_result += $"\t la $t2 String\n";
code_result += $"\t sw $a0 0($v0)\n"; // save len
code_result += $"\t sw $t2 4($v0)\n"; // save type
code_result += $"\t lw $t0 {stringref}\n";
code_result += $"\t lw $t1 {context_function[node.I]}\n";
code_result += $"\t addi $t0, $t0, 8\n"; //saltate el tipo y tamano
code_result += $"\t addi $v0, $v0, 8\n"; //saltate el tipo y tamano
//I
code_result += $"\t lw $t1 {context_function[node.I]}\n";
//L
code_result += $"\t lw $t2 {context_function[node.L]}\n";
code_result += $"\t add $t0, $t0, $t1\n";//parate en I
code_result += $"\t .sub: \n";
code_result += $"\t beq $t2 $zero .endsub\n";
code_result += $"\t lb $t3 0($t0)\n";
code_result += $"\t sb $t3 0($v0)\n";
code_result += $"\t addi $t2, $t2, -1\n";
code_result += $"\t addi $t0, 1\n";
code_result += $"\t addi $v0, 1\n";
code_result += $"\t j .sub\n";
code_result += $"\t .endsub: \n";
return(code_result);
}
public string Visit(CIL_StrStr node)
{
throw new NotImplementedException();
}
