luaur-code-gen 0.1.1

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_double::builtin_check_double;
use crate::functions::builtin_load_double::builtin_load_double;
use crate::records::builtin_impl_result::BuiltinImplResult;
use crate::records::ir_builder::IrBuilder;

pub fn translate_builtin_math_unary(
    build: &mut IrBuilder,
    cmd: IrCmd,
    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 arg_vm_reg = build.vm_reg(arg as u8);
    builtin_check_double(build, arg_vm_reg, pcpos);

    let varg = builtin_load_double(build, arg_vm_reg);
    let result = build.inst_ir_cmd_ir_op(cmd, varg);

    let ra_vm_reg = build.vm_reg(ra as u8);
    build.inst_ir_cmd_ir_op_ir_op(IrCmd::STORE_DOUBLE, ra_vm_reg, result);

    if ra != arg {
        let t_number = build.const_tag(0x03); // LUA_TNUMBER
        build.inst_ir_cmd_ir_op_ir_op(IrCmd::STORE_TAG, ra_vm_reg, t_number);
    }

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