[maxwell_3d] append inline index draw streams in bulk (#4083)

Inline index draws arrive as a batch but were processed one word at a time, so each index ran through the full per-method path and got appended a byte at a time.
Handle the whole batch in one pass instead, updating state once and appending all the indices together. Replay shadow control still goes word by word since it has to reload each one.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4083
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

src/video_core/engines/maxwell_3d.cpp

@@ -436,6 +436,14 @@ void Maxwell3D::CallMultiMethod(Core::System& system, u32 method, const u32* bas
         upload_state.ProcessData(base_start, amount);
         return;
     }
+    case MAXWELL3D_REG_INDEX(draw_inline_index):
+    case MAXWELL3D_REG_INDEX(inline_index_2x16.even):
+    case MAXWELL3D_REG_INDEX(inline_index_4x8.index0):
+        if (shadow_state.shadow_ram_control != Regs::ShadowRamControl::Replay) {
+            ProcessInlineIndexMultiData(method, base_start, amount);
+            break;
+        }
+        [[fallthrough]];
     default:
         for (u32 i = 0; i < amount; i++) {
             CallMethod(system, method, base_start[i], methods_pending - i <= 1);
@@ -622,6 +630,15 @@ void Maxwell3D::ProcessCBData(u32 value) {
     ProcessCBMultiData(&value, 1);
 }
 
+void Maxwell3D::ProcessInlineIndexMultiData(u32 method, const u32* start_base, u32 amount) {
+    if (amount == 0) {
+        return;
+    }
+    const u32 argument = ProcessShadowRam(method, start_base[amount - 1]);
+    ProcessDirtyRegisters(method, argument);
+    draw_manager.SetInlineIndexBuffer(*this, method, start_base, amount);
+}
+
 Texture::TICEntry Maxwell3D::GetTICEntry(u32 tic_index) const {
     const GPUVAddr tic_address_gpu{regs.tex_header.Address() +
                                    tic_index * sizeof(Texture::TICEntry)};