Merge e95f5d3766 into 80ea68b13c

ProcessorInterface: sync GPU just before PI_FIFO_RESET

Source/Core/Common/MathUtil.h

@@ -112,18 +112,12 @@ struct Rectangle
 
   constexpr T GetWidth() const { return GetDistance(left, right); }
   constexpr T GetHeight() const { return GetDistance(top, bottom); }
-  // If the rectangle is in a coordinate system with a lower-left origin, use
-  // this Clamp.
-  void ClampLL(T x1, T y1, T x2, T y2)
-  {
-    left = std::clamp(left, x1, x2);
-    right = std::clamp(right, x1, x2);
-    top = std::clamp(top, y2, y1);
-    bottom = std::clamp(bottom, y2, y1);
-  }
 
-  // If the rectangle is in a coordinate system with an upper-left origin,
+  // Clamp this rectangle to the given rectangle, specified as coordinates in
-  // use this Clamp.
+  // a coordinate system with an upper-left origin.
+  //
+  // REQUIRES: x1 <= x2
+  // REQUIRES: y1 <= y2
   void ClampUL(T x1, T y1, T x2, T y2)
   {
     left = std::clamp(left, x1, x2);

Source/Core/Core/HW/ProcessorInterface.cpp

@@ -98,6 +98,10 @@ void ProcessorInterfaceManager::RegisterMMIO(MMIO::Mapping* mmio, u32 base)
                    {
                      system.GetGPFifo().ResetGatherPipe();
 
+                     // Assume that all bytes that made it into the GPU fifo did in fact execute
+                     // before this MMIO write takes effect.
+                     system.GetFifo().SyncGPUForRegisterAccess();
+
                      // Call Fifo::ResetVideoBuffer() from the video thread. Since that function
                      // resets various pointers used by the video thread, we can't call it directly
                      // from the CPU thread, so queue a task to do it instead. In single-core mode,

Source/UnitTests/Common/MathUtilTest.cpp

@@ -187,5 +187,55 @@ TEST(MathUtil, RectangleGetHeightUnsigned)
   EXPECT_EQ(rect_e.GetHeight(), u32{0xFFFFFFF8});
 }
 
-// TODO: Add unit test coverage for `Rectangle::ClampUL`. (And consider removing
+TEST(MathUtil, RectangleClampUL)
-// `Rectangle::ClampLL`, which does not have any callers.)
+{
+  // Clamp in one direction
+  MathUtil::Rectangle<int> rect_a(2, 2, 5, 6);
+  rect_a.ClampUL(3, 1, 6, 7);
+  EXPECT_EQ(rect_a, MathUtil::Rectangle<int>(3, 2, 5, 6));
+
+  MathUtil::Rectangle<int> rect_b(2, 2, 5, 6);
+  rect_b.ClampUL(1, 3, 6, 7);
+  EXPECT_EQ(rect_b, MathUtil::Rectangle<int>(2, 3, 5, 6));
+
+  MathUtil::Rectangle<int> rect_c(2, 2, 5, 6);
+  rect_c.ClampUL(1, 1, 4, 7);
+  EXPECT_EQ(rect_c, MathUtil::Rectangle<int>(2, 2, 4, 6));
+
+  MathUtil::Rectangle<int> rect_d(2, 2, 5, 6);
+  rect_d.ClampUL(1, 1, 6, 5);
+  EXPECT_EQ(rect_d, MathUtil::Rectangle<int>(2, 2, 5, 5));
+
+  // Clamp in two directions
+  MathUtil::Rectangle<int> rect_e(2, 2, 5, 6);
+  rect_e.ClampUL(4, 3, 6, 7);
+  EXPECT_EQ(rect_e, MathUtil::Rectangle<int>(4, 3, 5, 6));
+
+  MathUtil::Rectangle<int> rect_f(2, 2, 5, 6);
+  rect_f.ClampUL(1, 1, 4, 4);
+  EXPECT_EQ(rect_f, MathUtil::Rectangle<int>(2, 2, 4, 4));
+
+  // Given rectangle contains this rectangle
+  MathUtil::Rectangle<int> rect_g(2, 2, 5, 6);
+  rect_g.ClampUL(1, 1, 6, 7);
+  EXPECT_EQ(rect_g, MathUtil::Rectangle<int>(2, 2, 5, 6));
+
+  // Given rectangle lies entirely within this rectangle
+  MathUtil::Rectangle<int> rect_h(2, 2, 5, 6);
+  rect_h.ClampUL(3, 3, 4, 4);
+  EXPECT_EQ(rect_h, MathUtil::Rectangle<int>(3, 3, 4, 4));
+
+  // Given rectangle exactly matches this rectangle
+  MathUtil::Rectangle<int> rect_i(2, 2, 5, 6);
+  rect_i.ClampUL(2, 2, 5, 6);
+  EXPECT_EQ(rect_i, MathUtil::Rectangle<int>(2, 2, 5, 6));
+
+  // Given rectangle does not intersect this rectangle at all
+  MathUtil::Rectangle<int> rect_j(2, 2, 5, 6);
+  rect_j.ClampUL(7, 8, 10, 11);
+  EXPECT_EQ(rect_j, MathUtil::Rectangle<int>(7, 8, 7, 8));
+
+  MathUtil::Rectangle<int> rect_k(2, 2, 5, 6);
+  rect_k.ClampUL(-1, -1, 1, 0);
+  EXPECT_EQ(rect_k, MathUtil::Rectangle<int>(1, 0, 1, 0));
+}