luaur-code-gen 0.1.3

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;
use crate::records::ir_op::IrOp;
use luaur_common::enums::luau_builtin_function::LuauBuiltinFunction;
use luaur_vm::enums::lua_type::lua_Type;

pub fn translate_builtin_2_number_to_number_libm(
    build: &mut IrBuilder,
    bfid: LuauBuiltinFunction,
    nparams: i32,
    ra: i32,
    arg: i32,
    args: IrOp,
    nresults: i32,
    pcpos: i32,
) -> BuiltinImplResult {
    if nparams < 2 || nresults > 1 {
        return BuiltinImplResult {
            r#type: BuiltinImplType::None,
            actual_result_count: -1,
        };
    }

    let arg_reg = build.vm_reg(arg as u8);
    builtin_check_double(build, arg_reg, pcpos);
    builtin_check_double(build, args, pcpos);

    let va = builtin_load_double(build, arg_reg);
    let vb = builtin_load_double(build, args);

    let vb = if bfid == LuauBuiltinFunction::LBF_MATH_LDEXP {
        build.inst_ir_cmd_ir_op(IrCmd::NUM_TO_INT, vb)
    } else {
        vb
    };

    let bfid_op = build.const_uint(bfid as u32);
    let res = build.inst_ir_cmd_ir_op_ir_op_ir_op(IrCmd::INVOKE_LIBM, bfid_op, va, vb);

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

    if ra != arg {
        let tag = build.const_tag(lua_Type::LUA_TNUMBER as u8);
        build.inst_ir_cmd_ir_op_ir_op(IrCmd::STORE_TAG, ra_reg, tag);
    }

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