[Libre-soc-bugs] [Bug 684] XLEN-16 fails when XLEN=8

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=684

--- Comment #14 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
helpers.py:

+    def XLCASTU(self, value):
+        bits = min(value.bits, self.XLEN)
+        return SelectableInt(value.value & ((1 << bits) - 1), self.XLEN)
+

that can just be:

        return SelectableInt(value.value, self.XLEN)

with a comment explaining that SelectableInt performs the required
value truncation.

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