JIT - fctidz: Properly saturate

src/xenia/cpu/ppc/testing/instr_fctixz.s

@@ -95,3 +95,100 @@ test_fctiwz_10:
 #   blr
 #   #_ REGISTER_OUT f0 0xfff4000000000000
 #   #_ REGISTER_OUT f1 0x0000000080000000
+
+# +0
+test_fctidz_1:
+  #_ REGISTER_IN f0 0x0000000000000000
+  fctidz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x0000000000000000
+  #_ REGISTER_OUT f1 0x0000000000000000
+
+# -0
+test_fctidz_2:
+  #_ REGISTER_IN f0 0x8000000000000000
+  fctidz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x8000000000000000
+  #_ REGISTER_OUT f1 0x0000000000000000
+
+# smallest positive subnormal
+test_fctidz_3:
+  #_ REGISTER_IN f0 0x0000000000000001
+  fctidz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x0000000000000001
+  #_ REGISTER_OUT f1 0x0000000000000000
+
+# largest subnormal
+test_fctidz_4:
+  #_ REGISTER_IN f0 0x000fffffffffffff
+  fctidz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x000fffffffffffff
+  #_ REGISTER_OUT f1 0x0000000000000000
+
+# +1
+test_fctidz_5:
+  #_ REGISTER_IN f0 0x3ff0000000000000
+  fctidz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x3ff0000000000000
+  #_ REGISTER_OUT f1 0x0000000000000001
+
+# -1
+test_fctidz_6:
+  #_ REGISTER_IN f0 0xbff0000000000000
+  fctidz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0xbff0000000000000
+  #_ REGISTER_OUT f1 0xffffffffffffffff
+
+# -(2^31)
+test_fctidz_7:
+  #_ REGISTER_IN f0 0xc1e0000000000000
+  fctidz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0xc1e0000000000000
+  #_ REGISTER_OUT f1 0xffffffff80000000
+
+# 2^31 - 1
+test_fctidz_8:
+  #_ REGISTER_IN f0 0x41dfffffffc00000
+  fctidz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x41dfffffffc00000
+  #_ REGISTER_OUT f1 0x000000007fffffff
+
+# +infinity
+test_fctidz_9:
+  #_ REGISTER_IN f0 0x7ff0000000000000
+  fctidz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x7ff0000000000000
+  #_ REGISTER_OUT f1 0x7fffffffffffffff
+
+# -infinity
+test_fctidz_10:
+  #_ REGISTER_IN f0 0xfff0000000000000
+  fctidz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0xfff0000000000000
+  #_ REGISTER_OUT f1 0x8000000000000000
+
+# TODO(DrChat): Xenia doesn't handle NaNs yet.
+# # QNaN
+# test_fctidz_11:
+#   #_ REGISTER_IN f0 0xfff8000000000000
+#   fctidz f1, f0
+#   blr
+#   #_ REGISTER_OUT f0 0xfff8000000000000
+#   #_ REGISTER_OUT f1 0x8000000000000000
+# 
+# # SNaN
+# test_fctidz_12:
+#   #_ REGISTER_IN f0 0xfff4000000000000
+#   fctidz f1, f0
+#   blr
+#   #_ REGISTER_OUT f0 0xfff4000000000000
+#   #_ REGISTER_OUT f1 0x8000000000000000