[shader_recompiler] Fix Shuffle handling for Position attributes (#3406)

This fixes the rescaling path to properly convert to F32, matching native 1x behavior for any resolution.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3406
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: MaranBr <maranbr@outlook.com>
Co-committed-by: MaranBr <maranbr@outlook.com>

src/shader_recompiler/frontend/maxwell/translate_program.cpp

@@ -304,17 +304,9 @@ IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Blo
     Optimization::GlobalMemoryToStorageBufferPass(program, host_info);
     Optimization::TexturePass(env, program, host_info);
 
-    bool should_rescale =
-#ifdef __ANDROID__
-        Settings::values.resolution_info.active;
-#else
-        true;
-#endif
-
-    if (should_rescale) {
+    if (Settings::values.resolution_info.active) {
         Optimization::RescalingPass(program);
     }
-
     Optimization::DeadCodeEliminationPass(program);
     if (Settings::values.renderer_debug) {
         Optimization::VerificationPass(program);

src/shader_recompiler/ir_opt/rescaling_pass.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -63,10 +66,11 @@ void VisitMark(IR::Block& block, IR::Inst& inst) {
         }
         if (must_patch_outside) {
             const auto it{IR::Block::InstructionList::s_iterator_to(inst)};
-            IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
-            const IR::F32 new_inst{&*block.PrependNewInst(it, inst)};
+            IR::IREmitter ir{block, it};
+            IR::Inst* const new_inst{&*block.PrependNewInst(it, inst)};
+            const IR::F32 new_bitcast{ir.ConvertUToF(32, 32, IR::Value{new_inst})};
             const IR::F32 up_factor{ir.FPRecip(ir.ResolutionDownFactor())};
-            const IR::Value converted{ir.FPMul(new_inst, up_factor)};
+            const IR::Value converted{ir.FPMul(new_bitcast, up_factor)};
             inst.ReplaceUsesWith(converted);
         }
         break;