Shader_IR: Implement FLO instruction.

2 files changed, 20 insertions, 0 deletions

diff --git a/src/video_core/shader/decode/arithmetic_integer.cpp b/src/video_core/shader/decode/arithmetic_integer.cpp
index a33d242e9..9208b7bef 100644
--- a/src/video_core/shader/decode/arithmetic_integer.cpp
+++ b/src/video_core/shader/decode/arithmetic_integer.cpp
@@ -130,6 +130,24 @@ u32 ShaderIR::DecodeArithmeticInteger(NodeBlock& bb, u32 pc) {
         SetRegister(bb, instr.gpr0, value);
         break;
     }
+    case OpCode::Id::FLO_R:
+    case OpCode::Id::FLO_C:
+    case OpCode::Id::FLO_IMM: {
+        Node value;
+        if (instr.flo.invert) {
+            op_b = Operation(OperationCode::IBitwiseNot, NO_PRECISE, op_b);
+        }
+        if (instr.flo.is_signed) {
+            value = Operation(OperationCode::IBitMSB, NO_PRECISE, op_b);
+        } else {
+            value = Operation(OperationCode::UBitMSB, NO_PRECISE, op_b);
+        }
+        if (instr.flo.sh) {
+            value = Operation(OperationCode::UBitwiseXor, NO_PRECISE, value, Immediate(31));
+        }
+        SetRegister(bb, instr.gpr0, value);
+        break;
+    }
     case OpCode::Id::SEL_C:
     case OpCode::Id::SEL_R:
     case OpCode::Id::SEL_IMM: {
diff --git a/src/video_core/shader/node.h b/src/video_core/shader/node.h
index 54217e6a4..2d11facaf 100644
--- a/src/video_core/shader/node.h
+++ b/src/video_core/shader/node.h
@@ -68,6 +68,7 @@ enum class OperationCode {
     IBitfieldInsert,       /// (MetaArithmetic, int base, int insert, int offset, int bits) -> int
     IBitfieldExtract,      /// (MetaArithmetic, int value, int offset, int offset) -> int
     IBitCount,             /// (MetaArithmetic, int) -> int
+    IBitMSB,               /// (MetaArithmetic, int) -> int
 
     UAdd,                  /// (MetaArithmetic, uint a, uint b) -> uint
     UMul,                  /// (MetaArithmetic, uint a, uint b) -> uint
@@ -86,6 +87,7 @@ enum class OperationCode {
     UBitfieldInsert,  /// (MetaArithmetic, uint base, uint insert, int offset, int bits) -> uint
     UBitfieldExtract, /// (MetaArithmetic, uint value, int offset, int offset) -> uint
     UBitCount,        /// (MetaArithmetic, uint) -> uint
+    UBitMSB,          /// (MetaArithmetic, uint) -> uint
 
     HAdd,       /// (MetaArithmetic, f16vec2 a, f16vec2 b) -> f16vec2
     HMul,       /// (MetaArithmetic, f16vec2 a, f16vec2 b) -> f16vec2