luaur-code-gen 0.1.0

Native (A64/X64) code generation for Luau (Rust).
Documentation 
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use crate::enums::builtin_impl_type::BuiltinImplType;
use crate::enums::ir_cmd::IrCmd;
use crate::functions::builtin_check_int_64::builtin_check_int_64;
use crate::functions::builtin_load_int_64::builtin_load_int_64;
use crate::records::builtin_impl_result::BuiltinImplResult;
use crate::records::ir_builder::IrBuilder;
use luaur_vm::enums::lua_type::lua_Type;

pub fn translate_builtin_int_64_neg(
    build: &mut IrBuilder,
    nparams: i32,
    ra: i32,
    arg: i32,
    nresults: i32,
    pcpos: i32,
) -> BuiltinImplResult {
    if nparams != 1 || nresults > 1 {
        return BuiltinImplResult {
            r#type: BuiltinImplType::None,
            actual_result_count: -1,
        };
    }

    let ra_op = build.vm_reg(ra as u8);
    let arg_op = build.vm_reg(arg as u8);

    builtin_check_int_64(build, arg_op, pcpos);

    let va = builtin_load_int_64(build, arg_op);
    let zero = build.const_int_64(0);
    let result = build.inst_ir_cmd_ir_op_ir_op(IrCmd::SUB_INT64, zero, va);

    build.inst_ir_cmd_ir_op_ir_op(IrCmd::STORE_INT64, ra_op, result);
    let tag = build.const_tag(lua_Type::LUA_TINTEGER as u8);
    build.inst_ir_cmd_ir_op_ir_op(IrCmd::STORE_TAG, ra_op, tag);

    BuiltinImplResult {
        r#type: BuiltinImplType::Full,
        actual_result_count: 1,
    }
}