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Re: [PATCH] i586: Use a jump table in strcpy.S {BZ #22353]


On 10/30/2017 02:12 PM, H.J. Lu wrote:

What's the performance impact of the change?  Is it even worth to use a jump
table here?


I added 2 strcpy implementations to hjl/pr22353/master.  Jump table is faster
than other non-SSE strcpy implementations because it can copy up to 4 bytes
at a time.

To clarify, I meant replacing the jump table with conditional branches, basically getting rid of Duff's device.

Thanks,
Florian


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