Comment #3 on issue 1023 by alexandre.rames: NaN is interpreted as true in conditionals on ARM with crankshaft
http://code.google.com/p/v8/issues/detail?id=1023
The fix here is quite easy. Provided that the vcmp before has the E bit (bit 8) set and invalid exception are enabled, it will raise an invalid exception if the operand is NaN.
However we need to make sure the Invalid Exception is enabled. This is not the first time we need to make sure such checks. I'll first create a patch where we locally enable it, but we should later try to make sure that all these are always enabled in the generated code. (FPSCR bits 8-12 and 15 sets)
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