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_whitenotifier-c >
[nmigen] rroohhh opened issue #385: Bad error message for duplicate ClockDomain -
https://git.io/Jf8gV
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ZirconiumX >
Question: how do I implement comparison in terms of a subtraction? I've already got a giant 64-bit adder in my critical path, might as well put it to use
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ZirconiumX >
If x - y < 0 (setting the carry bit) then x < y
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ZirconiumX >
But signed comparison seems trickier
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tpw_rules >
as in V?
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tpw_rules >
2s complement overflow?
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ktemkin >
look at how other ALUs generate their Signed Overflow bit
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tpw_rules >
mmh is there no way to view a pdf raw on github
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ktemkin >
well, that saves me the hassle of typing an equivalent out
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ZirconiumX >
Oh, it's just the overflow flag. I thought it'd be trickier than that
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mwk >
hm? it's overflow XOR sign
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