From 301e9bbc03821ef7943d84b24b32c8b732a39f6a Mon Sep 17 00:00:00 2001
From: Liam <byteslice@airmail.cc>
Date: Mon, 19 Dec 2022 19:29:58 -0500
Subject: vulkan: implement 'turbo mode' clock booster

---
 src/video_core/host_shaders/CMakeLists.txt         |  1 +
 src/video_core/host_shaders/vulkan_turbo_mode.comp | 29 ++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 src/video_core/host_shaders/vulkan_turbo_mode.comp

(limited to 'src/video_core/host_shaders')

diff --git a/src/video_core/host_shaders/CMakeLists.txt b/src/video_core/host_shaders/CMakeLists.txt
index e6dc24f22..f275b2aa9 100644
--- a/src/video_core/host_shaders/CMakeLists.txt
+++ b/src/video_core/host_shaders/CMakeLists.txt
@@ -47,6 +47,7 @@ set(SHADER_FILES
     vulkan_present_scaleforce_fp16.frag
     vulkan_present_scaleforce_fp32.frag
     vulkan_quad_indexed.comp
+    vulkan_turbo_mode.comp
     vulkan_uint8.comp
 )
 
diff --git a/src/video_core/host_shaders/vulkan_turbo_mode.comp b/src/video_core/host_shaders/vulkan_turbo_mode.comp
new file mode 100644
index 000000000..d651001d9
--- /dev/null
+++ b/src/video_core/host_shaders/vulkan_turbo_mode.comp
@@ -0,0 +1,29 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#version 460 core
+
+layout (local_size_x = 16, local_size_y = 8, local_size_z = 1) in;
+
+layout (binding = 0) buffer ThreadData {
+    uint data[];
+};
+
+uint xorshift32(uint x) {
+    x ^= x << 13;
+    x ^= x >> 17;
+    x ^= x << 5;
+    return x;
+}
+
+uint getGlobalIndex() {
+    return gl_GlobalInvocationID.x + gl_GlobalInvocationID.y * gl_WorkGroupSize.y * gl_NumWorkGroups.y;
+}
+
+void main() {
+    uint myIndex = xorshift32(getGlobalIndex());
+    uint otherIndex = xorshift32(myIndex);
+
+    uint otherValue = atomicAdd(data[otherIndex % data.length()], 0) + 1;
+    atomicAdd(data[myIndex % data.length()], otherValue);
+}
-- 
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