1 files changed, 63 insertions, 0 deletions
diff --git a/src/tests/video_core/native_semaphore.cpp b/src/tests/video_core/native_semaphore.cpp
new file mode 100644
index 0000000000..8dcafd91bc
--- /dev/null
+++ b/src/tests/video_core/native_semaphore.cpp
@@ -0,0 +1,63 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include <array>
+#include <optional>
+#include <vector>
+#include <catch2/catch_test_macros.hpp>
+#include "common/common_types.h"
+#include "video_core/native_semaphore.h"
+
+TEST_CASE("Native semaphore predicates require the actual producer value", "[native-gpu]") {
+    const Tegra::NativeSemaphoreWait equal{0x1000, 840, 1};
+    REQUIRE_FALSE(equal.Matches(0));
+    REQUIRE_FALSE(equal.Matches(839));
+    REQUIRE(equal.Matches(840));
+    REQUIRE_FALSE(equal.Matches(841));
+    const Tegra::NativeSemaphoreWait gequal{0x1000, 840, 4};
+    REQUIRE_FALSE(gequal.Matches(0));
+    REQUIRE_FALSE(gequal.Matches(839));
+    REQUIRE(gequal.Matches(840));
+    REQUIRE(gequal.Matches(841));
+    const Tegra::NativeSemaphoreWait mask{0x1000, 0x24, 8};
+    REQUIRE_FALSE(mask.Matches(0));
+    REQUIRE_FALSE(mask.Matches(0x10));
+    REQUIRE(mask.Matches(4));
+    REQUIRE(mask.Matches(0x20));
+    REQUIRE_FALSE(Tegra::NativeSemaphoreWait::Supported(0));
+    REQUIRE_FALSE(Tegra::NativeSemaphoreWait::Supported(2));
+    REQUIRE_FALSE(Tegra::NativeSemaphoreWait{0x1000, 0, 2}.Matches(0));
+}
+
+TEST_CASE("Native channels resume in dependency order without completing blocked work", "[native-gpu]") {
+    const std::array<size_t, 3> channels{0, 1, 2};
+    std::array<std::optional<Tegra::NativeSemaphoreWait>, 3> waits{
+        Tegra::NativeSemaphoreWait{0x1000, 1, 4},
+        Tegra::NativeSemaphoreWait{0x2000, 1, 1},
+        Tegra::NativeSemaphoreWait{0x3000, 1, 4},
+    };
+    std::array<u32, 3> words{};
+    std::array<u32, 3> following_commands{};
+    std::vector<size_t> order;
+    const auto ready = [&](size_t channel) {
+        return waits[channel] && waits[channel]->Matches(words[channel]);
+    };
+    const auto dispatch = [&](size_t channel) {
+        REQUIRE(ready(channel));
+        waits[channel].reset();
+        ++following_commands[channel];
+        order.push_back(channel);
+        if (channel) words[channel - 1] = 1;
+    };
+    REQUIRE(Tegra::ResumeReadyNativeChannels(channels, ready, dispatch) == 0);
+    REQUIRE(order.empty());
+    REQUIRE(following_commands == std::array<u32, 3>{0, 0, 0});
+    // A real independent producer releases the last channel. Its remaining
+    // FIFO commands release the next channel, then the original consumer.
+    words[2] = 1;
+    REQUIRE(Tegra::ResumeReadyNativeChannels(channels, ready, dispatch) == 3);
+    REQUIRE(order == std::vector<size_t>{2, 1, 0});
+    REQUIRE(following_commands == std::array<u32, 3>{1, 1, 1});
+    REQUIRE(Tegra::ResumeReadyNativeChannels(channels, ready, dispatch) == 0);
+    REQUIRE(following_commands == std::array<u32, 3>{1, 1, 1});
+}