From 6c655321e6b04b8648802e296bb5ca11d290ae68 Mon Sep 17 00:00:00 2001
From: swurl <swurl@swurl.xyz>
Date: Sat, 31 May 2025 02:33:02 -0400
Subject: Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>
---
 externals/oaknut/tests/vector_code_gen.cpp | 91 ++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 externals/oaknut/tests/vector_code_gen.cpp

(limited to 'externals/oaknut/tests/vector_code_gen.cpp')

diff --git a/externals/oaknut/tests/vector_code_gen.cpp b/externals/oaknut/tests/vector_code_gen.cpp
new file mode 100644
index 0000000000..5ede9e565c
--- /dev/null
+++ b/externals/oaknut/tests/vector_code_gen.cpp
@@ -0,0 +1,91 @@
+// SPDX-FileCopyrightText: Copyright (c) 2023 merryhime <https://mary.rs>
+// SPDX-License-Identifier: MIT
+
+#include <cstdint>
+#include <cstdio>
+#include <cstring>
+#include <limits>
+#include <vector>
+
+#include <catch2/catch_test_macros.hpp>
+
+#include "architecture.hpp"
+
+#ifdef ON_ARM64
+
+#    include "oaknut/code_block.hpp"
+#    include "oaknut/oaknut.hpp"
+#    include "rand_int.hpp"
+
+using namespace oaknut;
+using namespace oaknut::util;
+
+TEST_CASE("Basic Test (VectorCodeGenerator)")
+{
+    std::vector<std::uint32_t> vec;
+    VectorCodeGenerator code{vec};
+
+    code.MOV(W0, 42);
+    code.RET();
+
+    CodeBlock mem{4096};
+
+    mem.unprotect();
+    std::memcpy(mem.ptr(), vec.data(), vec.size() * sizeof(std::uint32_t));
+    mem.protect();
+    mem.invalidate_all();
+
+    int result = ((int (*)())mem.ptr())();
+    REQUIRE(result == 42);
+}
+
+TEST_CASE("Fibonacci (VectorCodeGenerator)")
+{
+    std::vector<std::uint32_t> vec;
+    VectorCodeGenerator code{vec};
+
+    Label start, end, zero, recurse;
+
+    code.l(start);
+    code.STP(X29, X30, SP, PRE_INDEXED, -32);
+    code.STP(X20, X19, SP, 16);
+    code.MOV(X29, SP);
+    code.MOV(W19, W0);
+    code.SUBS(W0, W0, 1);
+    code.B(LT, zero);
+    code.B(NE, recurse);
+    code.MOV(W0, 1);
+    code.B(end);
+
+    code.l(zero);
+    code.MOV(W0, WZR);
+    code.B(end);
+
+    code.l(recurse);
+    code.BL(start);
+    code.MOV(W20, W0);
+    code.SUB(W0, W19, 2);
+    code.BL(start);
+    code.ADD(W0, W0, W20);
+
+    code.l(end);
+    code.LDP(X20, X19, SP, 16);
+    code.LDP(X29, X30, SP, POST_INDEXED, 32);
+    code.RET();
+
+    CodeBlock mem{4096};
+
+    mem.unprotect();
+    std::memcpy(mem.ptr(), vec.data(), vec.size() * sizeof(std::uint32_t));
+    mem.protect();
+    mem.invalidate_all();
+
+    auto fib = (int (*)(int))mem.ptr();
+
+    REQUIRE(fib(0) == 0);
+    REQUIRE(fib(1) == 1);
+    REQUIRE(fib(5) == 5);
+    REQUIRE(fib(9) == 34);
+}
+
+#endif
-- 
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