unittests/ASM: Test pf2id overflow saturation

unittests/ASM/FEX_bugs/PF2ID_Saturate.asm

@@ -0,0 +1,19 @@
+%ifdef CONFIG
+{
+  "RegData": {
+    "MM0": "0x800000007FFFFFFF"
+  },
+  "HostFeatures": ["3DNOW"]
+}
+%endif
+
+; +3000000000.0f > INT32_MAX -> saturate to 0x7FFFFFFF
+; -3000000000.0f < INT32_MIN -> saturate to 0x80000000
+pf2id mm0, [rel data1]
+
+hlt
+
+align 8
+data1:
+dd 0x4F32D05E ; +3000000000.0f
+dd 0xCF32D05E ; -3000000000.0f