16 files changed, 147 insertions, 59 deletions

diff --git a/src/shader_recompiler/CMakeLists.txt b/src/shader_recompiler/CMakeLists.txt
index 83b763447..19db17c6d 100644
--- a/src/shader_recompiler/CMakeLists.txt
+++ b/src/shader_recompiler/CMakeLists.txt
@@ -231,6 +231,7 @@ add_library(shader_recompiler STATIC
     ir_opt/rescaling_pass.cpp
     ir_opt/ssa_rewrite_pass.cpp
     ir_opt/texture_pass.cpp
+    ir_opt/vendor_workaround_pass.cpp
     ir_opt/verification_pass.cpp
     object_pool.h
     precompiled_headers.h
diff --git a/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp b/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
index d0e308124..64e7bad75 100644
--- a/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
+++ b/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
@@ -559,12 +559,12 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
                        const IR::Value& offset, const IR::Value& lod_clamp) {
     const auto info{inst.Flags<IR::TextureInstInfo>()};
     ScopedRegister dpdx, dpdy, coords;
-    const bool multi_component{info.num_derivates > 1 || info.has_lod_clamp};
+    const bool multi_component{info.num_derivatives > 1 || info.has_lod_clamp};
     if (multi_component) {
         // Allocate this early to avoid aliasing other registers
         dpdx = ScopedRegister{ctx.reg_alloc};
         dpdy = ScopedRegister{ctx.reg_alloc};
-        if (info.num_derivates >= 3) {
+        if (info.num_derivatives >= 3) {
             coords = ScopedRegister{ctx.reg_alloc};
         }
     }
@@ -584,7 +584,7 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
                 dpdx.reg, derivatives_vec, dpdx.reg, derivatives_vec, dpdy.reg, derivatives_vec,
                 dpdy.reg, derivatives_vec);
         Register final_coord;
-        if (info.num_derivates >= 3) {
+        if (info.num_derivatives >= 3) {
             ctx.Add("MOV.F {}.z,{}.x;"
                     "MOV.F {}.z,{}.y;",
                     dpdx.reg, coord_vec, dpdy.reg, coord_vec);
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
index d9872ecc2..6e940bd5a 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
@@ -548,15 +548,15 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
     if (sparse_inst) {
         throw NotImplementedException("EmitImageGradient Sparse");
     }
-    if (!offset.IsEmpty() && info.num_derivates <= 2) {
+    if (!offset.IsEmpty() && info.num_derivatives <= 2) {
         throw NotImplementedException("EmitImageGradient offset");
     }
     const auto texture{Texture(ctx, info, index)};
     const auto texel{ctx.var_alloc.Define(inst, GlslVarType::F32x4)};
-    const bool multi_component{info.num_derivates > 1 || info.has_lod_clamp};
+    const bool multi_component{info.num_derivatives > 1 || info.has_lod_clamp};
     const auto derivatives_vec{ctx.var_alloc.Consume(derivatives)};
     if (multi_component) {
-        if (info.num_derivates >= 3) {
+        if (info.num_derivatives >= 3) {
             const auto offset_vec{ctx.var_alloc.Consume(offset)};
             ctx.Add("{}=textureGrad({},{},vec3({}.xz, {}.x),vec3({}.yw, {}.y));", texel, texture,
                     coords, derivatives_vec, offset_vec, derivatives_vec, offset_vec);
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv.cpp b/src/shader_recompiler/backend/spirv/emit_spirv.cpp
index 34592a01f..0031fa5fb 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv.cpp
@@ -407,7 +407,7 @@ void SetupCapabilities(const Profile& profile, const Info& info, EmitContext& ct
         }
         ctx.AddCapability(spv::Capability::DemoteToHelperInvocation);
     }
-    if (info.stores[IR::Attribute::ViewportIndex]) {
+    if (info.stores[IR::Attribute::ViewportIndex] && profile.support_multi_viewport) {
         ctx.AddCapability(spv::Capability::MultiViewport);
     }
     if (info.stores[IR::Attribute::ViewportMask] && profile.support_viewport_mask) {
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
index 1d77426e0..e5a78a914 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
@@ -84,6 +84,10 @@ std::optional<OutAttr> OutputAttrPointer(EmitContext& ctx, IR::Attribute attr) {
         }
         return std::nullopt;
     case IR::Attribute::ViewportIndex:
+        if (!ctx.profile.support_multi_viewport) {
+            LOG_WARNING(Shader, "Ignoring viewport index store on non-supporting driver");
+            return std::nullopt;
+        }
         if (ctx.profile.support_viewport_index_layer_non_geometry ||
             ctx.stage == Shader::Stage::Geometry) {
             return OutAttr{ctx.viewport_index, ctx.U32[1]};
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp
index 8decdf399..22ceca19c 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp
@@ -67,22 +67,22 @@ public:
         }
     }
 
-    explicit ImageOperands(EmitContext& ctx, bool has_lod_clamp, Id derivates, u32 num_derivates,
-                           Id offset, Id lod_clamp) {
-        if (!Sirit::ValidId(derivates)) {
-            throw LogicError("Derivates must be present");
+    explicit ImageOperands(EmitContext& ctx, bool has_lod_clamp, Id derivatives,
+                           u32 num_derivatives, Id offset, Id lod_clamp) {
+        if (!Sirit::ValidId(derivatives)) {
+            throw LogicError("Derivatives must be present");
         }
         boost::container::static_vector<Id, 3> deriv_x_accum;
         boost::container::static_vector<Id, 3> deriv_y_accum;
-        for (u32 i = 0; i < num_derivates; ++i) {
-            deriv_x_accum.push_back(ctx.OpCompositeExtract(ctx.F32[1], derivates, i * 2));
-            deriv_y_accum.push_back(ctx.OpCompositeExtract(ctx.F32[1], derivates, i * 2 + 1));
+        for (u32 i = 0; i < num_derivatives; ++i) {
+            deriv_x_accum.push_back(ctx.OpCompositeExtract(ctx.F32[1], derivatives, i * 2));
+            deriv_y_accum.push_back(ctx.OpCompositeExtract(ctx.F32[1], derivatives, i * 2 + 1));
         }
-        const Id derivates_X{ctx.OpCompositeConstruct(
-            ctx.F32[num_derivates], std::span{deriv_x_accum.data(), deriv_x_accum.size()})};
-        const Id derivates_Y{ctx.OpCompositeConstruct(
-            ctx.F32[num_derivates], std::span{deriv_y_accum.data(), deriv_y_accum.size()})};
-        Add(spv::ImageOperandsMask::Grad, derivates_X, derivates_Y);
+        const Id derivatives_X{ctx.OpCompositeConstruct(
+            ctx.F32[num_derivatives], std::span{deriv_x_accum.data(), deriv_x_accum.size()})};
+        const Id derivatives_Y{ctx.OpCompositeConstruct(
+            ctx.F32[num_derivatives], std::span{deriv_y_accum.data(), deriv_y_accum.size()})};
+        Add(spv::ImageOperandsMask::Grad, derivatives_X, derivatives_Y);
         if (Sirit::ValidId(offset)) {
             Add(spv::ImageOperandsMask::Offset, offset);
         }
@@ -91,26 +91,26 @@ public:
         }
     }
 
-    explicit ImageOperands(EmitContext& ctx, bool has_lod_clamp, Id derivates_1, Id derivates_2,
+    explicit ImageOperands(EmitContext& ctx, bool has_lod_clamp, Id derivatives_1, Id derivatives_2,
                            Id offset, Id lod_clamp) {
-        if (!Sirit::ValidId(derivates_1) || !Sirit::ValidId(derivates_2)) {
-            throw LogicError("Derivates must be present");
+        if (!Sirit::ValidId(derivatives_1) || !Sirit::ValidId(derivatives_2)) {
+            throw LogicError("Derivatives must be present");
         }
         boost::container::static_vector<Id, 3> deriv_1_accum{
-            ctx.OpCompositeExtract(ctx.F32[1], derivates_1, 0),
-            ctx.OpCompositeExtract(ctx.F32[1], derivates_1, 2),
-            ctx.OpCompositeExtract(ctx.F32[1], derivates_2, 0),
+            ctx.OpCompositeExtract(ctx.F32[1], derivatives_1, 0),
+            ctx.OpCompositeExtract(ctx.F32[1], derivatives_1, 2),
+            ctx.OpCompositeExtract(ctx.F32[1], derivatives_2, 0),
         };
         boost::container::static_vector<Id, 3> deriv_2_accum{
-            ctx.OpCompositeExtract(ctx.F32[1], derivates_1, 1),
-            ctx.OpCompositeExtract(ctx.F32[1], derivates_1, 3),
-            ctx.OpCompositeExtract(ctx.F32[1], derivates_2, 1),
+            ctx.OpCompositeExtract(ctx.F32[1], derivatives_1, 1),
+            ctx.OpCompositeExtract(ctx.F32[1], derivatives_1, 3),
+            ctx.OpCompositeExtract(ctx.F32[1], derivatives_2, 1),
         };
-        const Id derivates_id1{ctx.OpCompositeConstruct(
+        const Id derivatives_id1{ctx.OpCompositeConstruct(
             ctx.F32[3], std::span{deriv_1_accum.data(), deriv_1_accum.size()})};
-        const Id derivates_id2{ctx.OpCompositeConstruct(
+        const Id derivatives_id2{ctx.OpCompositeConstruct(
             ctx.F32[3], std::span{deriv_2_accum.data(), deriv_2_accum.size()})};
-        Add(spv::ImageOperandsMask::Grad, derivates_id1, derivates_id2);
+        Add(spv::ImageOperandsMask::Grad, derivatives_id1, derivatives_id2);
         if (Sirit::ValidId(offset)) {
             Add(spv::ImageOperandsMask::Offset, offset);
         }
@@ -548,12 +548,12 @@ Id EmitImageQueryLod(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, I
 }
 
 Id EmitImageGradient(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords,
-                     Id derivates, Id offset, Id lod_clamp) {
+                     Id derivatives, Id offset, Id lod_clamp) {
     const auto info{inst->Flags<IR::TextureInstInfo>()};
     const auto operands =
-        info.num_derivates == 3
-            ? ImageOperands(ctx, info.has_lod_clamp != 0, derivates, offset, {}, lod_clamp)
-            : ImageOperands(ctx, info.has_lod_clamp != 0, derivates, info.num_derivates, offset,
+        info.num_derivatives == 3
+            ? ImageOperands(ctx, info.has_lod_clamp != 0, derivatives, offset, {}, lod_clamp)
+            : ImageOperands(ctx, info.has_lod_clamp != 0, derivatives, info.num_derivatives, offset,
                             lod_clamp);
     return Emit(&EmitContext::OpImageSparseSampleExplicitLod,
                 &EmitContext::OpImageSampleExplicitLod, ctx, inst, ctx.F32[4],
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h b/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h
index a440b557d..7d34575c8 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h
@@ -543,7 +543,7 @@ Id EmitImageQueryDimensions(EmitContext& ctx, IR::Inst* inst, const IR::Value& i
                             const IR::Value& skip_mips);
 Id EmitImageQueryLod(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords);
 Id EmitImageGradient(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords,
-                     Id derivates, Id offset, Id lod_clamp);
+                     Id derivatives, Id offset, Id lod_clamp);
 Id EmitImageRead(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords);
 void EmitImageWrite(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords, Id color);
 Id EmitIsTextureScaled(EmitContext& ctx, const IR::Value& index);
diff --git a/src/shader_recompiler/frontend/ir/ir_emitter.cpp b/src/shader_recompiler/frontend/ir/ir_emitter.cpp
index b7caa4246..49171c470 100644
--- a/src/shader_recompiler/frontend/ir/ir_emitter.cpp
+++ b/src/shader_recompiler/frontend/ir/ir_emitter.cpp
@@ -1864,11 +1864,11 @@ Value IREmitter::ImageQueryLod(const Value& handle, const Value& coords, Texture
     return Inst(op, Flags{info}, handle, coords);
 }
 
-Value IREmitter::ImageGradient(const Value& handle, const Value& coords, const Value& derivates,
+Value IREmitter::ImageGradient(const Value& handle, const Value& coords, const Value& derivatives,
                                const Value& offset, const F32& lod_clamp, TextureInstInfo info) {
     const Opcode op{handle.IsImmediate() ? Opcode::BoundImageGradient
                                          : Opcode::BindlessImageGradient};
-    return Inst(op, Flags{info}, handle, coords, derivates, offset, lod_clamp);
+    return Inst(op, Flags{info}, handle, coords, derivatives, offset, lod_clamp);
 }
 
 Value IREmitter::ImageRead(const Value& handle, const Value& coords, TextureInstInfo info) {
diff --git a/src/shader_recompiler/frontend/ir/ir_emitter.h b/src/shader_recompiler/frontend/ir/ir_emitter.h
index f3c81dbe1..6c30897f4 100644
--- a/src/shader_recompiler/frontend/ir/ir_emitter.h
+++ b/src/shader_recompiler/frontend/ir/ir_emitter.h
@@ -335,7 +335,7 @@ public:
     [[nodiscard]] Value ImageFetch(const Value& handle, const Value& coords, const Value& offset,
                                    const U32& lod, const U32& multisampling, TextureInstInfo info);
     [[nodiscard]] Value ImageGradient(const Value& handle, const Value& coords,
-                                      const Value& derivates, const Value& offset,
+                                      const Value& derivatives, const Value& offset,
                                       const F32& lod_clamp, TextureInstInfo info);
     [[nodiscard]] Value ImageRead(const Value& handle, const Value& coords, TextureInstInfo info);
     void ImageWrite(const Value& handle, const Value& coords, const Value& color,
diff --git a/src/shader_recompiler/frontend/ir/modifiers.h b/src/shader_recompiler/frontend/ir/modifiers.h
index 1e9e8c8f5..c20c2401f 100644
--- a/src/shader_recompiler/frontend/ir/modifiers.h
+++ b/src/shader_recompiler/frontend/ir/modifiers.h
@@ -40,7 +40,7 @@ union TextureInstInfo {
     BitField<21, 1, u32> has_lod_clamp;
     BitField<22, 1, u32> relaxed_precision;
     BitField<23, 2, u32> gather_component;
-    BitField<25, 2, u32> num_derivates;
+    BitField<25, 2, u32> num_derivatives;
     BitField<27, 3, ImageFormat> image_format;
     BitField<30, 1, u32> ndv_is_active;
 };
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/texture_gradient.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/texture_gradient.cpp
index dd34507bc..4ce3dd0cd 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/texture_gradient.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/texture_gradient.cpp
@@ -59,7 +59,7 @@ void Impl(TranslatorVisitor& v, u64 insn, bool is_bindless) {
         BitField<51, 3, IR::Pred> sparse_pred;
         BitField<0, 8, IR::Reg> dest_reg;
         BitField<8, 8, IR::Reg> coord_reg;
-        BitField<20, 8, IR::Reg> derivate_reg;
+        BitField<20, 8, IR::Reg> derivative_reg;
         BitField<28, 3, TextureType> type;
         BitField<31, 4, u64> mask;
         BitField<36, 13, u64> cbuf_offset;
@@ -71,7 +71,7 @@ void Impl(TranslatorVisitor& v, u64 insn, bool is_bindless) {
     }
 
     IR::Value coords;
-    u32 num_derivates{};
+    u32 num_derivatives{};
     IR::Reg base_reg{txd.coord_reg};
     IR::Reg last_reg;
     IR::Value handle;
@@ -90,42 +90,42 @@ void Impl(TranslatorVisitor& v, u64 insn, bool is_bindless) {
     switch (txd.type) {
     case TextureType::_1D: {
         coords = v.F(base_reg);
-        num_derivates = 1;
+        num_derivatives = 1;
         last_reg = base_reg + 1;
         break;
     }
     case TextureType::ARRAY_1D: {
         last_reg = base_reg + 1;
         coords = v.ir.CompositeConstruct(v.F(base_reg), read_array());
-        num_derivates = 1;
+        num_derivatives = 1;
         break;
     }
     case TextureType::_2D: {
         last_reg = base_reg + 2;
         coords = v.ir.CompositeConstruct(v.F(base_reg), v.F(base_reg + 1));
-        num_derivates = 2;
+        num_derivatives = 2;
         break;
     }
     case TextureType::ARRAY_2D: {
         last_reg = base_reg + 2;
         coords = v.ir.CompositeConstruct(v.F(base_reg), v.F(base_reg + 1), read_array());
-        num_derivates = 2;
+        num_derivatives = 2;
         break;
     }
     default:
         throw NotImplementedException("Invalid texture type");
     }
 
-    const IR::Reg derivate_reg{txd.derivate_reg};
-    IR::Value derivates;
-    switch (num_derivates) {
+    const IR::Reg derivative_reg{txd.derivative_reg};
+    IR::Value derivatives;
+    switch (num_derivatives) {
     case 1: {
-        derivates = v.ir.CompositeConstruct(v.F(derivate_reg), v.F(derivate_reg + 1));
+        derivatives = v.ir.CompositeConstruct(v.F(derivative_reg), v.F(derivative_reg + 1));
         break;
     }
     case 2: {
-        derivates = v.ir.CompositeConstruct(v.F(derivate_reg), v.F(derivate_reg + 1),
-                                            v.F(derivate_reg + 2), v.F(derivate_reg + 3));
+        derivatives = v.ir.CompositeConstruct(v.F(derivative_reg), v.F(derivative_reg + 1),
+                                              v.F(derivative_reg + 2), v.F(derivative_reg + 3));
         break;
     }
     default:
@@ -150,9 +150,10 @@ void Impl(TranslatorVisitor& v, u64 insn, bool is_bindless) {
 
     IR::TextureInstInfo info{};
     info.type.Assign(GetType(txd.type));
-    info.num_derivates.Assign(num_derivates);
+    info.num_derivatives.Assign(num_derivatives);
     info.has_lod_clamp.Assign(has_lod_clamp ? 1 : 0);
-    const IR::Value sample{v.ir.ImageGradient(handle, coords, derivates, offset, lod_clamp, info)};
+    const IR::Value sample{
+        v.ir.ImageGradient(handle, coords, derivatives, offset, lod_clamp, info)};
 
     IR::Reg dest_reg{txd.dest_reg};
     for (size_t element = 0; element < 4; ++element) {
diff --git a/src/shader_recompiler/frontend/maxwell/translate_program.cpp b/src/shader_recompiler/frontend/maxwell/translate_program.cpp
index 47183cae1..321ea625b 100644
--- a/src/shader_recompiler/frontend/maxwell/translate_program.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate_program.cpp
@@ -310,6 +310,7 @@ IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Blo
     }
     Optimization::CollectShaderInfoPass(env, program);
     Optimization::LayerPass(program, host_info);
+    Optimization::VendorWorkaroundPass(program);
 
     CollectInterpolationInfo(env, program);
     AddNVNStorageBuffers(program);
diff --git a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
index f46e55122..ec12c843a 100644
--- a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
+++ b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
@@ -428,7 +428,7 @@ void FoldFPAdd32(IR::Inst& inst) {
     }
 }
 
-bool FoldDerivateYFromCorrection(IR::Inst& inst) {
+bool FoldDerivativeYFromCorrection(IR::Inst& inst) {
     const IR::Value lhs_value{inst.Arg(0)};
     const IR::Value rhs_value{inst.Arg(1)};
     IR::Inst* const lhs_op{lhs_value.InstRecursive()};
@@ -464,7 +464,7 @@ void FoldFPMul32(IR::Inst& inst) {
     if (lhs_value.IsImmediate() || rhs_value.IsImmediate()) {
         return;
     }
-    if (FoldDerivateYFromCorrection(inst)) {
+    if (FoldDerivativeYFromCorrection(inst)) {
         return;
     }
     IR::Inst* const lhs_op{lhs_value.InstRecursive()};
@@ -699,7 +699,7 @@ void FoldFSwizzleAdd(IR::Block& block, IR::Inst& inst) {
     }
 }
 
-bool FindGradient3DDerivates(std::array<IR::Value, 3>& results, IR::Value coord) {
+bool FindGradient3DDerivatives(std::array<IR::Value, 3>& results, IR::Value coord) {
     if (coord.IsImmediate()) {
         return false;
     }
@@ -834,7 +834,7 @@ void FoldImageSampleImplicitLod(IR::Block& block, IR::Inst& inst) {
     IR::Inst* const inst2 = coords.InstRecursive();
     std::array<std::array<IR::Value, 3>, 3> results_matrix;
     for (size_t i = 0; i < 3; i++) {
-        if (!FindGradient3DDerivates(results_matrix[i], inst2->Arg(i).Resolve())) {
+        if (!FindGradient3DDerivatives(results_matrix[i], inst2->Arg(i).Resolve())) {
             return;
         }
     }
@@ -852,7 +852,7 @@ void FoldImageSampleImplicitLod(IR::Block& block, IR::Inst& inst) {
     IR::Value derivatives_1 = ir.CompositeConstruct(results_matrix[0][1], results_matrix[0][2],
                                                     results_matrix[1][1], results_matrix[1][2]);
     IR::Value derivatives_2 = ir.CompositeConstruct(results_matrix[2][1], results_matrix[2][2]);
-    info.num_derivates.Assign(3);
+    info.num_derivatives.Assign(3);
     IR::Value new_gradient_instruction =
         ir.ImageGradient(handle, new_coords, derivatives_1, derivatives_2, lod_clamp, info);
     IR::Inst* const new_inst = new_gradient_instruction.InstRecursive();
diff --git a/src/shader_recompiler/ir_opt/passes.h b/src/shader_recompiler/ir_opt/passes.h
index 7082fc5f2..1e637cb23 100644
--- a/src/shader_recompiler/ir_opt/passes.h
+++ b/src/shader_recompiler/ir_opt/passes.h
@@ -26,6 +26,7 @@ void SsaRewritePass(IR::Program& program);
 void PositionPass(Environment& env, IR::Program& program);
 void TexturePass(Environment& env, IR::Program& program, const HostTranslateInfo& host_info);
 void LayerPass(IR::Program& program, const HostTranslateInfo& host_info);
+void VendorWorkaroundPass(IR::Program& program);
 void VerificationPass(const IR::Program& program);
 
 // Dual Vertex
diff --git a/src/shader_recompiler/ir_opt/vendor_workaround_pass.cpp b/src/shader_recompiler/ir_opt/vendor_workaround_pass.cpp
new file mode 100644
index 000000000..08c658cb8
--- /dev/null
+++ b/src/shader_recompiler/ir_opt/vendor_workaround_pass.cpp
@@ -0,0 +1,79 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "shader_recompiler/frontend/ir/basic_block.h"
+#include "shader_recompiler/frontend/ir/ir_emitter.h"
+#include "shader_recompiler/frontend/ir/value.h"
+#include "shader_recompiler/ir_opt/passes.h"
+
+namespace Shader::Optimization {
+
+namespace {
+void AddingByteSwapsWorkaround(IR::Block& block, IR::Inst& inst) {
+    /*
+     * Workaround for an NVIDIA bug seen in Super Mario RPG
+     *
+     * We are looking for this pattern:
+     *   %lhs_bfe = BitFieldUExtract %factor_a, #0, #16
+     *   %lhs_mul = IMul32 %lhs_bfe, %factor_b           // potentially optional?
+     *   %lhs_shl = ShiftLeftLogical32 %lhs_mul, #16
+     *   %rhs_bfe = BitFieldUExtract %factor_a, #16, #16
+     *   %result  = IAdd32 %lhs_shl, %rhs_bfe
+     *
+     * And replacing the IAdd32 with a BitwiseOr32
+     *   %result  = BitwiseOr32 %lhs_shl, %rhs_bfe
+     *
+     */
+    IR::Inst* const lhs_shl{inst.Arg(0).TryInstRecursive()};
+    IR::Inst* const rhs_bfe{inst.Arg(1).TryInstRecursive()};
+    if (!lhs_shl || !rhs_bfe) {
+        return;
+    }
+    if (lhs_shl->GetOpcode() != IR::Opcode::ShiftLeftLogical32 ||
+        lhs_shl->Arg(1) != IR::Value{16U}) {
+        return;
+    }
+    if (rhs_bfe->GetOpcode() != IR::Opcode::BitFieldUExtract || rhs_bfe->Arg(1) != IR::Value{16U} ||
+        rhs_bfe->Arg(2) != IR::Value{16U}) {
+        return;
+    }
+    IR::Inst* const lhs_mul{lhs_shl->Arg(0).TryInstRecursive()};
+    if (!lhs_mul) {
+        return;
+    }
+    const bool lhs_mul_optional{lhs_mul->GetOpcode() == IR::Opcode::BitFieldUExtract};
+    if (lhs_mul->GetOpcode() != IR::Opcode::IMul32 &&
+        lhs_mul->GetOpcode() != IR::Opcode::BitFieldUExtract) {
+        return;
+    }
+    IR::Inst* const lhs_bfe{lhs_mul_optional ? lhs_mul : lhs_mul->Arg(0).TryInstRecursive()};
+    if (!lhs_bfe) {
+        return;
+    }
+    if (lhs_bfe->GetOpcode() != IR::Opcode::BitFieldUExtract) {
+        return;
+    }
+    if (lhs_bfe->Arg(1) != IR::Value{0U} || lhs_bfe->Arg(2) != IR::Value{16U}) {
+        return;
+    }
+    IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
+    inst.ReplaceUsesWith(ir.BitwiseOr(IR::U32{inst.Arg(0)}, IR::U32{inst.Arg(1)}));
+}
+
+} // Anonymous namespace
+
+void VendorWorkaroundPass(IR::Program& program) {
+    for (IR::Block* const block : program.post_order_blocks) {
+        for (IR::Inst& inst : block->Instructions()) {
+            switch (inst.GetOpcode()) {
+            case IR::Opcode::IAdd32:
+                AddingByteSwapsWorkaround(*block, inst);
+                break;
+            default:
+                break;
+            }
+        }
+    }
+}
+
+} // namespace Shader::Optimization
diff --git a/src/shader_recompiler/profile.h b/src/shader_recompiler/profile.h
index e62ba8a20..66901a965 100644
--- a/src/shader_recompiler/profile.h
+++ b/src/shader_recompiler/profile.h
@@ -43,6 +43,7 @@ struct Profile {
     bool support_gl_sparse_textures{};
     bool support_gl_derivative_control{};
     bool support_scaled_attributes{};
+    bool support_multi_viewport{};
 
     bool warp_size_potentially_larger_than_guest{};