JIT - fctixx: Properly handle numbers > INT_MAX

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

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+# Credits: These tests stolen from https://github.com/dolphin-emu/hwtests
+# +0
+test_fctiwz_1:
+  #_ REGISTER_IN f0 0x0000000000000000
+  fctiwz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x0000000000000000
+  #_ REGISTER_OUT f1 0x0000000000000000
+
+# -0
+test_fctiwz_2:
+  #_ REGISTER_IN f0 0x8000000000000000
+  fctiwz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x8000000000000000
+  #_ REGISTER_OUT f1 0x0000000000000000
+
+# smallest positive subnormal
+test_fctiwz_3:
+  #_ REGISTER_IN f0 0x0000000000000001
+  fctiwz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x0000000000000001
+  #_ REGISTER_OUT f1 0x0000000000000000
+
+# largest subnormal
+test_fctiwz_4:
+  #_ REGISTER_IN f0 0x000fffffffffffff
+  fctiwz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x000fffffffffffff
+  #_ REGISTER_OUT f1 0x0000000000000000
+
+# +1
+test_fctiwz_5:
+  #_ REGISTER_IN f0 0x3ff0000000000000
+  fctiwz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x3ff0000000000000
+  #_ REGISTER_OUT f1 0x0000000000000001
+
+# -1
+test_fctiwz_6:
+  #_ REGISTER_IN f0 0xbff0000000000000
+  fctiwz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0xbff0000000000000
+  #_ REGISTER_OUT f1 0x00000000ffffffff
+
+# -(2^31)
+test_fctiwz_7:
+  #_ REGISTER_IN f0 0xc1e0000000000000
+  fctiwz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0xc1e0000000000000
+  #_ REGISTER_OUT f1 0x0000000080000000
+
+# 2^31 - 1
+test_fctiwz_8:
+  #_ REGISTER_IN f0 0x41dfffffffc00000
+  fctiwz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x41dfffffffc00000
+  #_ REGISTER_OUT f1 0x000000007fffffff
+
+# +infinity
+test_fctiwz_9:
+  #_ REGISTER_IN f0 0x7ff0000000000000
+  fctiwz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0x7ff0000000000000
+  #_ REGISTER_OUT f1 0x000000007fffffff
+
+# -infinity
+test_fctiwz_10:
+  #_ REGISTER_IN f0 0xfff0000000000000
+  fctiwz f1, f0
+  blr
+  #_ REGISTER_OUT f0 0xfff0000000000000
+  #_ REGISTER_OUT f1 0x0000000080000000
+
+# TODO(DrChat): Xenia doesn't handle NaNs yet.
+# # QNaN
+# test_fctiwz_11:
+#   #_ REGISTER_IN f0 0xfff8000000000000
+#   fctiwz f1, f0
+#   blr
+#   #_ REGISTER_OUT f0 0xfff8000000000000
+#   #_ REGISTER_OUT f1 0x0000000080000000
+# 
+# # SNaN
+# test_fctiwz_12:
+#   #_ REGISTER_IN f0 0xfff4000000000000
+#   fctiwz f1, f0
+#   blr
+#   #_ REGISTER_OUT f0 0xfff4000000000000
+#   #_ REGISTER_OUT f1 0x0000000080000000