rsx/fp: Fix SAT and ABS modifier precedence

- Real RSX applies the SAT modifier before ABS

Author: Yahfz

rpcs3/Emu/RSX/Program/FragmentProgramDecompiler.cpp

@@ -792,8 +792,10 @@ template<typename T> std::string FragmentProgramDecompiler::GetSRC(T src)
 	}
 
 	// Warning: Modifier order matters. e.g neg should be applied after precision clamping (tested with Naruto UNS)
+	const bool precision_before_abs = precision_modifier == RSX_FP_PRECISION_SATURATE;
+	if (precision_before_abs) ret = ClampValue(ret, precision_modifier);
 	if (src.abs) ret = "abs(" + ret + ")";
-	if (precision_modifier) ret = ClampValue(ret, precision_modifier);
+	if (precision_modifier && !precision_before_abs) ret = ClampValue(ret, precision_modifier);
 	if (src.neg) ret = "-" + ret;
 
 	return ret;

rpcs3/Emu/RSX/Program/GLSLInterpreter/FragmentInterpreter.glsl

@@ -83,6 +83,8 @@ layout(location=0) in vec4 in_regs[16];
 #define RSX_FP_REGISTER_TYPE_CONSTANT 2
 #define RSX_FP_REGISTER_TYPE_UNKNOWN 3
 
+#define RSX_FP_PRECISION_SATURATE 4
+
 #define CELL_GCM_SHADER_CONTROL_DEPTH_EXPORT 0xe
 #define CELL_GCM_SHADER_CONTROL_32_BITS_EXPORTS 0x40
 
@@ -242,6 +244,11 @@ vec4 read_src(const in int index)
 	ur1 = GET_INST_BITS(index + 1, 9, 8);
 	vr0 = shuffle(vr0, ur1);
 
+	if (GET_INST_BITS(2, 19 + index * 3, 3) == RSX_FP_PRECISION_SATURATE)
+	{
+		vr0 = clamp(select(vr0, vr_zero, isnan(vr0)), 0., 1.);
+	}
+
 	// abs
 	if (index == 0)
 	{