Merge nx2 into nx2-experimental

Resolved by area:
- audio feature_support.h: nx2's native revision handling.
- fiber.cpp: ours, which also drops the unused rewind stack.
- host_memory.cpp: ours granule bitmap and HintCold, plus nx2's
  fallocate hole punching per whole dirty granule on Linux.
- texture_cache.h: nx2's old-age eviction pass, then our Collect().
- kepler_compute.cpp: shared upscale slots, then Fortune's Weave's,
  then the Kirby Air Riders scan.
- nx2_gsv.h: ours, plus nx2's GetBufferMaxResolution and graphics
  device ids (1-based).
- nvhost_ctrl_gpu.cpp: engine support flag bits 40-44.
- lower_to_maxwell.h: ours as the base, with nx2's seven lowering
  commits applied one at a time. Second texture descriptor buffers
  are read bindless in TEX, TLD.SCR (level zero) and SUST; FSEL
  keeps its operand modifiers; TXD takes any channel mask.

lower_to_maxwell.h lowers 837 Fortune's Weave and 1183 Mario Kart
World shader dumps with the same rejects as nx2 and ours (12 and 0).

Assisted-by: Claude Sonnet 5.5 (conflict analysis and drafting)

1 files changed, 15 insertions, 0 deletions

diff --git a/src/video_core/engines/maxwell_3d.cpp b/src/video_core/engines/maxwell_3d.cpp
index b344514bc6..9731f54584 100644
--- a/src/video_core/engines/maxwell_3d.cpp
+++ b/src/video_core/engines/maxwell_3d.cpp
@@ -164,6 +164,8 @@ bool Maxwell3D::IsMethodExecutable(u32 method) {
     case MAXWELL3D_REG_INDEX(vertex_array_instance_first):
     case MAXWELL3D_REG_INDEX(vertex_array_instance_subsequent):
     case MAXWELL3D_REG_INDEX(draw_texture.src_y0):
+    case RootTables::SelectMethod:
+    case RootTables::LoadMethod:
     case MAXWELL3D_REG_INDEX(wait_for_idle):
     case MAXWELL3D_REG_INDEX(shadow_ram_control):
     case MAXWELL3D_REG_INDEX(load_mme.instruction_ptr):
@@ -352,6 +354,17 @@ void Maxwell3D::ProcessMethodCall(u32 method, u32 argument, u32 nonshadow_argume
         LOG_DEBUG(HW_GPU, "Native GPU surface clear: value={:#x}", argument);
     }
     switch (method) {
+    case RootTables::SelectMethod:
+        root_tables.selected = argument & 7;
+        root_tables.offset = (argument >> 8) & 0xff;
+        return;
+    case RootTables::LoadMethod:
+        if (root_tables.offset < 256 && root_tables.offset % 4 == 0) {
+            root_tables.tables[root_tables.selected][root_tables.offset / 4] = argument;
+            root_tables.loaded = true;
+        }
+        root_tables.offset += 4;
+        return;
     case MAXWELL3D_REG_INDEX(wait_for_idle):
         return rasterizer->WaitForIdle();
     case MAXWELL3D_REG_INDEX(shadow_ram_control):
@@ -829,6 +842,8 @@ bool FrontHandledOutsideDrawManager(u32 method) {
         return true;
     }
     switch (method) {
+    case Maxwell3D::RootTables::SelectMethod:
+    case Maxwell3D::RootTables::LoadMethod:
     case MAXWELL3D_REG_INDEX(wait_for_idle):
     case MAXWELL3D_REG_INDEX(shadow_ram_control):
     case MAXWELL3D_REG_INDEX(load_mme.instruction_ptr):