diff --git a/rpcs3/Emu/RSX/Common/FragmentProgramDecompiler.cpp b/rpcs3/Emu/RSX/Common/FragmentProgramDecompiler.cpp
index 938f0d9c5e..b0b9e76057 100644
--- a/rpcs3/Emu/RSX/Common/FragmentProgramDecompiler.cpp
+++ b/rpcs3/Emu/RSX/Common/FragmentProgramDecompiler.cpp
@@ -413,8 +413,8 @@ bool FragmentProgramDecompiler::handle_scb(u32 opcode)
 	case RSX_FP_OPCODE_MIN: SetDst("min($0, $1)"); return true;
 	case RSX_FP_OPCODE_MOV: SetDst("$0"); return true;
 	case RSX_FP_OPCODE_MUL: SetDst("($0 * $1)"); return true;
-	case RSX_FP_OPCODE_PK2: SetDst("packSnorm2x16($0)"); return true; // TODO: More testing (Sonic The Hedgehog (NPUB-30442/NPEB-00478))
-	case RSX_FP_OPCODE_PK4: SetDst("packSnorm4x8($0)"); return true; // TODO: More testing (Sonic The Hedgehog (NPUB-30442/NPEB-00478))
+	case RSX_FP_OPCODE_PK2: SetDst("round(clamp($0, -1.0, 1.0) * 32767.0)"); return true; // TODO: More testing (Sonic The Hedgehog (NPUB-30442/NPEB-00478))
+	case RSX_FP_OPCODE_PK4: SetDst("round(clamp($0, -1.0, 1.0) * 127.0)"); return true; // TODO: More testing (Sonic The Hedgehog (NPUB-30442/NPEB-00478))
 	case RSX_FP_OPCODE_PK16: LOG_ERROR(RSX, "Unimplemented SCB instruction: PK16"); return true;
 	case RSX_FP_OPCODE_PKB: LOG_ERROR(RSX, "Unimplemented SCB instruction: PKB"); return true;
 	case RSX_FP_OPCODE_PKG: LOG_ERROR(RSX, "Unimplemented SCB instruction: PKG"); return true;
@@ -494,8 +494,8 @@ bool FragmentProgramDecompiler::handle_tex_srb(u32 opcode)
 			return true;
 		}
 		return false;
-	case RSX_FP_OPCODE_UP2: SetDst("unpackSnorm2x16($0)"); return true; // TODO: More testing (Sonic The Hedgehog (NPUB-30442/NPEB-00478))
-	case RSX_FP_OPCODE_UP4: SetDst("unpackSnorm4x8($0)"); return true; // TODO: More testing (Sonic The Hedgehog (NPUB-30442/NPEB-00478))
+	case RSX_FP_OPCODE_UP2: SetDst("clamp($0 / 32767.0, -1.0, 1.0)"); return true; // TODO: More testing (Sonic The Hedgehog (NPUB-30442/NPEB-00478))
+	case RSX_FP_OPCODE_UP4: SetDst("clamp($0 / 127.0, -1.0, 1.0)"); return true; // TODO: More testing (Sonic The Hedgehog (NPUB-30442/NPEB-00478))
 	case RSX_FP_OPCODE_UP16: LOG_ERROR(RSX, "Unimplemented TEX_SRB instruction: UP16"); return true;
 	case RSX_FP_OPCODE_UPB: LOG_ERROR(RSX, "Unimplemented TEX_SRB instruction: UPB"); return true;
 	case RSX_FP_OPCODE_UPG: LOG_ERROR(RSX, "Unimplemented TEX_SRB instruction: UPG"); return true;