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_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_vm::enums::lua_type::lua_Type;

pub fn translate_builtin_vector_lerp(
    build: &mut IrBuilder,
    nparams: i32,
    ra: i32,
    arg: i32,
    args: IrOp,
    arg3: IrOp,
    nresults: i32,
    pcpos: i32,
) -> BuiltinImplResult {
    if nparams < 3 || nresults > 1 {
        return BuiltinImplResult {
            r#type: BuiltinImplType::None,
            actual_result_count: -1,
        };
    }

    let arg1 = build.vm_reg(arg as u8);
    let fallback = build.vm_exit(pcpos as u32);
    build.load_and_check_tag(arg1, lua_Type::LUA_TVECTOR as u8, fallback);
    build.load_and_check_tag(args, lua_Type::LUA_TVECTOR as u8, fallback);
    builtin_check_double(build, arg3, pcpos);

    let a = build.inst_ir_cmd_ir_op(IrCmd::LOAD_TVALUE, arg1);
    let b = build.inst_ir_cmd_ir_op(IrCmd::LOAD_TVALUE, args);
    let t = builtin_load_double(build, arg3);

    let float_t = build.inst_ir_cmd_ir_op(IrCmd::NUM_TO_FLOAT, t);
    let tvec = build.inst_ir_cmd_ir_op(IrCmd::FLOAT_TO_VEC, float_t);
    let one_float = build.const_double(1.0);
    let one_vec = build.inst_ir_cmd_ir_op(IrCmd::FLOAT_TO_VEC, one_float);
    let diff = build.inst_ir_cmd_ir_op_ir_op(IrCmd::SUB_VEC, b, a);

    let res = build.inst_ir_cmd_ir_op_ir_op_ir_op(IrCmd::MULADD_VEC, diff, tvec, a);
    let ret = build.inst_ir_cmd_ir_op_ir_op_ir_op_ir_op(IrCmd::SELECT_VEC, res, b, tvec, one_vec);
    let tagged = build.inst_ir_cmd_ir_op(IrCmd::TAG_VECTOR, ret);
    let ra_reg = build.vm_reg(ra as u8);
    build.inst_ir_cmd_ir_op_ir_op(IrCmd::STORE_TVALUE, ra_reg, tagged);

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