[shader_recompiler] Add IAbs64 to prevent errors when using I2F with a 64-bit packed CBUF variant (#2918)

- Using I2F cbuf variant (packed 32x2 aka. U64)
- Code will call IAbs() if some conditions are met (signed + abs bit)
- Uh oh we don't have a variant for 64 bits!
- Fuck now we just made BAD ir code :(

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2918
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: Caio Oliveira <caiooliveirafarias0@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/shader_recompiler/backend/glasm/emit_glasm_instructions.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 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
 
@@ -313,6 +316,7 @@ void EmitUDiv32(EmitContext& ctx, IR::Inst& inst, ScalarU32 a, ScalarU32 b);
 void EmitINeg32(EmitContext& ctx, IR::Inst& inst, ScalarS32 value);
 void EmitINeg64(EmitContext& ctx, IR::Inst& inst, Register value);
 void EmitIAbs32(EmitContext& ctx, IR::Inst& inst, ScalarS32 value);
+void EmitIAbs64(EmitContext& ctx, IR::Inst& inst, ScalarS32 value);
 void EmitShiftLeftLogical32(EmitContext& ctx, IR::Inst& inst, ScalarU32 base, ScalarU32 shift);
 void EmitShiftLeftLogical64(EmitContext& ctx, IR::Inst& inst, ScalarRegister base, ScalarU32 shift);
 void EmitShiftRightLogical32(EmitContext& ctx, IR::Inst& inst, ScalarU32 base, ScalarU32 shift);

src/shader_recompiler/backend/glasm/emit_glasm_integer.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 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
 
@@ -113,6 +116,10 @@ void EmitIAbs32(EmitContext& ctx, IR::Inst& inst, ScalarS32 value) {
     ctx.Add("ABS.S {},{};", inst, value);
 }
 
+void EmitIAbs64(EmitContext& ctx, IR::Inst& inst, ScalarS32 value) {
+    ctx.Add("ABS.S64 {},{};", inst, value);
+}
+
 void EmitShiftLeftLogical32(EmitContext& ctx, IR::Inst& inst, ScalarU32 base, ScalarU32 shift) {
     ctx.Add("SHL.U {}.x,{},{};", inst, base, shift);
 }

src/shader_recompiler/backend/glsl/emit_glsl_instructions.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 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
 
@@ -373,6 +376,7 @@ void EmitUDiv32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::strin
 void EmitINeg32(EmitContext& ctx, IR::Inst& inst, std::string_view value);
 void EmitINeg64(EmitContext& ctx, IR::Inst& inst, std::string_view value);
 void EmitIAbs32(EmitContext& ctx, IR::Inst& inst, std::string_view value);
+void EmitIAbs64(EmitContext& ctx, IR::Inst& inst, std::string_view value);
 void EmitShiftLeftLogical32(EmitContext& ctx, IR::Inst& inst, std::string_view base,
                             std::string_view shift);
 void EmitShiftLeftLogical64(EmitContext& ctx, IR::Inst& inst, std::string_view base,

src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp

@@ -98,6 +98,11 @@ void EmitIAbs32(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
     ctx.AddU32("{}=abs(int({}));", inst, value);
 }
 
+void EmitIAbs64(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    // TODO: Uhm, are you sure? This may crash on some drivers!
+    ctx.AddU32("{}=abs(int64_t({}));", inst, value);
+}
+
 void EmitShiftLeftLogical32(EmitContext& ctx, IR::Inst& inst, std::string_view base,
                             std::string_view shift) {
     ctx.AddU32("{}={}<<{};", inst, base, shift);

src/shader_recompiler/backend/spirv/emit_spirv_instructions.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 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
 
@@ -293,6 +296,7 @@ Id EmitUDiv32(EmitContext& ctx, Id a, Id b);
 Id EmitINeg32(EmitContext& ctx, Id value);
 Id EmitINeg64(EmitContext& ctx, Id value);
 Id EmitIAbs32(EmitContext& ctx, Id value);
+Id EmitIAbs64(EmitContext& ctx, Id value);
 Id EmitShiftLeftLogical32(EmitContext& ctx, Id base, Id shift);
 Id EmitShiftLeftLogical64(EmitContext& ctx, Id base, Id shift);
 Id EmitShiftRightLogical32(EmitContext& ctx, Id base, Id shift);

src/shader_recompiler/backend/spirv/emit_spirv_integer.cpp

@@ -94,6 +94,10 @@ Id EmitIAbs32(EmitContext& ctx, Id value) {
     return ctx.OpSAbs(ctx.U32[1], value);
 }
 
+Id EmitIAbs64(EmitContext& ctx, Id value) {
+    return ctx.OpSAbs(ctx.U64, value);
+}
+
 Id EmitShiftLeftLogical32(EmitContext& ctx, Id base, Id shift) {
     return ctx.OpShiftLeftLogical(ctx.U32[1], base, shift);
 }

src/shader_recompiler/frontend/ir/ir_emitter.cpp

@@ -1190,8 +1190,15 @@ U32U64 IREmitter::INeg(const U32U64& value) {
     }
 }
 
-U32 IREmitter::IAbs(const U32& value) {
+U32U64 IREmitter::IAbs(const U32U64& value) {
+    switch (value.Type()) {
+    case Type::U32:
         return Inst<U32>(Opcode::IAbs32, value);
+    case Type::U64:
+        return Inst<U64>(Opcode::IAbs64, value);
+    default:
+        ThrowInvalidType(value.Type());
+    }
 }
 
 U32U64 IREmitter::ShiftLeftLogical(const U32U64& base, const U32& shift) {

src/shader_recompiler/frontend/ir/ir_emitter.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 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
 
@@ -218,7 +221,7 @@ public:
     [[nodiscard]] U32 IMul(const U32& a, const U32& b);
     [[nodiscard]] U32 IDiv(const U32& a, const U32& b, bool is_signed = false);
     [[nodiscard]] U32U64 INeg(const U32U64& value);
-    [[nodiscard]] U32 IAbs(const U32& value);
+    [[nodiscard]] U32U64 IAbs(const U32U64& value);
     [[nodiscard]] U32U64 ShiftLeftLogical(const U32U64& base, const U32& shift);
     [[nodiscard]] U32U64 ShiftRightLogical(const U32U64& base, const U32& shift);
     [[nodiscard]] U32U64 ShiftRightArithmetic(const U32U64& base, const U32& shift);

src/shader_recompiler/frontend/ir/opcodes.inc

@@ -296,6 +296,7 @@ OPCODE(UDiv32,                                              U32,            U32,
 OPCODE(INeg32,                                              U32,            U32,                                                                            )
 OPCODE(INeg64,                                              U64,            U64,                                                                            )
 OPCODE(IAbs32,                                              U32,            U32,                                                                            )
+OPCODE(IAbs64,                                              U64,            U64,                                                                            )
 OPCODE(ShiftLeftLogical32,                                  U32,            U32,            U32,                                                            )
 OPCODE(ShiftLeftLogical64,                                  U64,            U64,            U32,                                                            )
 OPCODE(ShiftRightLogical32,                                 U32,            U32,            U32,                                                            )

src/shader_recompiler/frontend/maxwell/translate/impl/integer_floating_point_conversion.cpp

@@ -70,32 +70,25 @@ void I2F(TranslatorVisitor& v, u64 insn, IR::U32U64 src) {
     int src_bitsize{};
     switch (i2f.int_format) {
     case IntFormat::U8:
-        src = v.ir.BitFieldExtract(src, v.ir.Imm32(static_cast<u32>(i2f.selector) * 8),
-                                   v.ir.Imm32(8), is_signed);
-        if (i2f.abs != 0) {
+        src = v.ir.BitFieldExtract(src, v.ir.Imm32(u32(i2f.selector) * 8), v.ir.Imm32(8), is_signed);
+        if (i2f.abs != 0)
             src = SmallAbs(v, src, 8);
-        }
         src_bitsize = 8;
         break;
     case IntFormat::U16:
-        if (i2f.selector == 1 || i2f.selector == 3) {
+        if (i2f.selector == 1 || i2f.selector == 3)
             throw NotImplementedException("Invalid U16 selector {}", i2f.selector.Value());
-        }
-        src = v.ir.BitFieldExtract(src, v.ir.Imm32(static_cast<u32>(i2f.selector) * 8),
-                                   v.ir.Imm32(16), is_signed);
-        if (i2f.abs != 0) {
+        src = v.ir.BitFieldExtract(src, v.ir.Imm32(u32(i2f.selector) * 8), v.ir.Imm32(16), is_signed);
+        if (i2f.abs != 0)
             src = SmallAbs(v, src, 16);
-        }
         src_bitsize = 16;
         break;
     case IntFormat::U32:
     case IntFormat::U64:
-        if (i2f.selector != 0) {
+        if (i2f.selector != 0)
             throw NotImplementedException("Unexpected selector {}", i2f.selector.Value());
-        }
-        if (i2f.abs != 0 && is_signed) {
+        if (i2f.abs != 0 && is_signed)
             src = v.ir.IAbs(src);
-        }
         src_bitsize = i2f.int_format == IntFormat::U64 ? 64 : 32;
         break;
     }
@@ -106,9 +99,7 @@ void I2F(TranslatorVisitor& v, u64 insn, IR::U32U64 src) {
         .rounding = CastFpRounding(i2f.fp_rounding),
         .fmz_mode = IR::FmzMode::DontCare,
     };
-    auto value{v.ir.ConvertIToF(static_cast<size_t>(dst_bitsize),
-                                static_cast<size_t>(conversion_src_bitsize), is_signed, src,
-                                fp_control)};
+    auto value{v.ir.ConvertIToF(size_t(dst_bitsize), size_t(conversion_src_bitsize), is_signed, src, fp_control)};
     if (i2f.neg != 0) {
         if (i2f.abs != 0 || !is_signed) {
             // We know the value is positive
@@ -141,9 +132,8 @@ void I2F(TranslatorVisitor& v, u64 insn, IR::U32U64 src) {
             throw NotImplementedException("Unaligned destination {}", i2f.dest_reg.Value());
         }
         const IR::Value vector{v.ir.UnpackDouble2x32(value)};
-        for (int i = 0; i < 2; ++i) {
-            v.X(i2f.dest_reg + i, IR::U32{v.ir.CompositeExtract(vector, static_cast<size_t>(i))});
-        }
+        for (int i = 0; i < 2; ++i)
+            v.X(i2f.dest_reg + i, IR::U32{v.ir.CompositeExtract(vector, size_t(i))});
         break;
     }
     default: