TextureCache: Refactor and fix linux compiling.

src/common/bit_util.h

@@ -7,6 +7,7 @@
 #include <bit>
 #include <climits>
 #include <cstddef>
+#include <type_traits>
 
 #include "common/common_types.h"
 
@@ -44,4 +45,10 @@ template <typename T>
     return static_cast<u32>(log2_f + static_cast<u64>((value ^ (1ULL << log2_f)) != 0ULL));
 }
 
+template <typename T>
+requires std::is_integral_v<T>
+[[nodiscard]] T NextPow2(T value) {
+    return static_cast<T>(1ULL << ((8U * sizeof(T)) - std::countl_zero(value - 1U)));
+}
+
 } // namespace Common

src/video_core/renderer_opengl/gl_texture_cache.cpp

@@ -9,6 +9,7 @@
 
 #include <glad/glad.h>
 
+#include "common/bit_util.h"
 #include "common/literals.h"
 #include "common/settings.h"
 #include "video_core/renderer_opengl/gl_device.h"
@@ -397,9 +398,6 @@ OGLTexture MakeImage(const VideoCommon::ImageInfo& info, GLenum gl_internal_form
     return GL_R32UI;
 }
 
-[[nodiscard]] u32 NextPow2(u32 value) {
-    return 1U << (32U - std::countl_zero(value - 1U));
-}
 } // Anonymous namespace
 
 ImageBufferMap::~ImageBufferMap() {
@@ -1308,7 +1306,7 @@ void FormatConversionPass::ConvertImage(Image& dst_image, Image& src_image,
         const u32 copy_size = region.width * region.height * region.depth * img_bpp;
         if (pbo_size < copy_size) {
             intermediate_pbo.Create();
-            pbo_size = NextPow2(copy_size);
+            pbo_size = Common::NextPow2(copy_size);
             glNamedBufferData(intermediate_pbo.handle, pbo_size, nullptr, GL_STREAM_COPY);
         }
         // Copy from source to PBO

src/video_core/renderer_vulkan/vk_texture_cache.cpp

@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "common/bit_cast.h"
+#include "common/bit_util.h"
 #include "common/settings.h"
 
 #include "video_core/engines/fermi_2d.h"
@@ -775,16 +776,12 @@ bool TextureCacheRuntime::ShouldReinterpret(Image& dst, Image& src) {
     return false;
 }
 
-[[nodiscard]] size_t NextPow2(size_t value) {
-    return static_cast<size_t>(1ULL << ((8U * sizeof(size_t)) - std::countl_zero(value - 1U)));
-}
-
 VkBuffer TextureCacheRuntime::GetTemporaryBuffer(size_t needed_size) {
     const auto level = (8 * sizeof(size_t)) - std::countl_zero(needed_size - 1ULL);
     if (buffer_commits[level]) {
         return *buffers[level];
     }
-    const auto new_size = NextPow2(needed_size);
+    const auto new_size = Common::NextPow2(needed_size);
     VkBufferUsageFlags flags = VK_BUFFER_USAGE_TRANSFER_SRC_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT |
                                VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT |
                                VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT;