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After reflecting on the difficulties of lowering the increment operators, decided just to implement them in bytecode

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Nathan Braswell
2018-03-14 23:43:52 -04:00
parent c6a43728a5
commit 8de92e1c3b
1 changed files with 16 additions and 0 deletions
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16
stdlib/bytecode_generator.krak
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@@ -535,6 +535,22 @@ obj bytecode_generator (Object) {
// generate with lvalue=true to make return a pointer
if (name == "&" && parameter_nodes.size == 1)
return generate(parameter_nodes[0], true)
if (name == "++" || name == "++p" || name == "--" || name == "--p") {
var op_size = size_to_operand_size(type_size(get_ast_type(parameter_nodes[0])))
var addr_reg = generate(parameter_nodes[0], true)
var value_reg = emit_ldr(addr_reg, 0, op_size)
var mod_reg = -1
if (name[0] == '+')
mod_reg = emit_addi(value_reg, 1)
else
mod_reg = emit_addi(value_reg, -1)
emit_str(addr_reg, 0, mod_reg, op_size)
// if preincrement, return modified value, else unmodified
if (name.length() == 2)
return mod_reg
else
return value_reg
}
var params = parameter_nodes.map(fun(n: *ast_node): int return generate(n);)
if (name == "+") {