unittests/ASM: Test pf2iw with values falling outside of 16-bit range

unittests/ASM/FEX_bugs/PF2IW_Saturate.asm

@@ -0,0 +1,19 @@
+%ifdef CONFIG
+{
+  "RegData": {
+    "MM0": "0xFFFF800000007FFF"
+  },
+  "HostFeatures": ["3DNOW"]
+}
+%endif
+
+; +100000.0f > INT16_MAX -> saturate to 0x00007FFF
+; -100000.0f < INT16_MIN -> saturate to 0xFFFF8000
+pf2iw mm0, [rel data1]
+
+hlt
+
+align 8
+data1:
+dd 0x47C35000 ; +100000.0f
+dd 0xC7C35000 ; -100000.0f