Messages in this thread | | | Subject | Re: [PATCH] ARC: Fix __udelay parentheses | From | Joe Perches <> | Date | Wed, 28 Aug 2013 23:01:18 -0700 |
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On Thu, 2013-08-29 at 05:55 +0000, Vineet Gupta wrote:
> The intent of writing orig code was to generate only 1 MPYHU insn (32*32 = > high-part-64) for the whole math, at any optimization level whatsoever. If the > first MPY is overflowing, u r likely spinning for > 10,000 usec (10ms) which is 1 > scheduling tick on ARC - not good - presumably for hardware debug. It would be > better to use a tight loop there and throw it out later.
It's a delay loop. Does it matter whether or not a multiply or division is used?
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