Shader: implement RDNA2 image atomic float maximum

Shader: implement RDNA2 image atomic float minimum

Co-authored-by: foufouadi <attar.foued@gmail.com>
Co-authored-by: frans <francois.att@gmail.com>
Co-authored-by: fxpw <fxpw@outlook.com>
Co-authored-by: Matthew Hurley <171001439+theantipopau@users.noreply.github.com>

src/graphics/shader/recompiler/frontend/decode/ImageOps.cpp

@@ -198,6 +198,8 @@ constexpr Detail::OpcodeMap MIMG_ATOMIC_OPCODE_LIST[] = {
     {0x18u, Opcode::IMAGE_ATOMIC_AND},
     {0x19u, Opcode::IMAGE_ATOMIC_OR},
     {0x1au, Opcode::IMAGE_ATOMIC_XOR},
+    {0x1eu, Opcode::IMAGE_ATOMIC_FMIN},
+    {0x1fu, Opcode::IMAGE_ATOMIC_FMAX},
 };
 
 constexpr auto MIMG_SAMPLE_OPS = Detail::MakeOpcodeTable<0x100>(MIMG_SAMPLE_OPCODE_LIST);

src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.cpp

@@ -579,6 +579,8 @@ std::string InstructionToString(const Instruction& inst) {
 		case Opcode::IMAGE_ATOMIC_AND:
 		case Opcode::IMAGE_ATOMIC_OR:
 		case Opcode::IMAGE_ATOMIC_XOR:
+		case Opcode::IMAGE_ATOMIC_FMIN:
+		case Opcode::IMAGE_ATOMIC_FMAX:
 		case Opcode::IMAGE_LOAD:
 		case Opcode::IMAGE_LOAD_MIP:
 		case Opcode::IMAGE_GET_RESINFO:

src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.h

@@ -571,6 +571,8 @@ enum class Opcode {
 	IMAGE_ATOMIC_AND,
 	IMAGE_ATOMIC_OR,
 	IMAGE_ATOMIC_XOR,
+	IMAGE_ATOMIC_FMIN,
+	IMAGE_ATOMIC_FMAX,
 	IMAGE_SAMPLE,
 	IMAGE_GATHER4_L,
 	IMAGE_GATHER4_LZ,