--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/luajit/src/lj_carith.h	Fri Jan 23 22:38:59 2026 -0800
@@ -0,0 +1,37 @@
+/*
+** C data arithmetic.
+** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
+*/
+
+#ifndef _LJ_CARITH_H
+#define _LJ_CARITH_H
+
+#include "lj_obj.h"
+
+#if LJ_HASFFI
+
+LJ_FUNC int lj_carith_op(lua_State *L, MMS mm);
+
+#if LJ_32
+LJ_FUNC uint64_t lj_carith_shl64(uint64_t x, int32_t sh);
+LJ_FUNC uint64_t lj_carith_shr64(uint64_t x, int32_t sh);
+LJ_FUNC uint64_t lj_carith_sar64(uint64_t x, int32_t sh);
+LJ_FUNC uint64_t lj_carith_rol64(uint64_t x, int32_t sh);
+LJ_FUNC uint64_t lj_carith_ror64(uint64_t x, int32_t sh);
+#endif
+LJ_FUNC uint64_t lj_carith_shift64(uint64_t x, int32_t sh, int op);
+LJ_FUNC uint64_t lj_carith_check64(lua_State *L, int narg, CTypeID *id);
+
+#if LJ_32 && LJ_HASJIT
+LJ_FUNC int64_t lj_carith_mul64(int64_t x, int64_t k);
+#endif
+LJ_FUNC uint64_t lj_carith_divu64(uint64_t a, uint64_t b);
+LJ_FUNC int64_t lj_carith_divi64(int64_t a, int64_t b);
+LJ_FUNC uint64_t lj_carith_modu64(uint64_t a, uint64_t b);
+LJ_FUNC int64_t lj_carith_modi64(int64_t a, int64_t b);
+LJ_FUNC uint64_t lj_carith_powu64(uint64_t x, uint64_t k);
+LJ_FUNC int64_t lj_carith_powi64(int64_t x, int64_t k);
+
+#endif
+
+#endif