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Re: [Patch, microblaze]: Fix bswaphi2 implementation


Hi Michael,

Please find attached same patch based against latest from gcc master.

Can this be applied and backported to gcc-4_8-branch when reviewed.

thanks,
David

On 15 July 2013 14:49, David Holsgrove <david.holsgrove@xilinx.com> wrote:
> MicroBlaze insn swaph swaps the contents of register rA as two
> halfwords placing result in rD;
>
> (rD)[0:15]  <- (rA)[16:31]
> (rD)[16:31] <- (rA)[0:15]
>
> gcc bswaphi2 is intended to reverse the order of the bytes in the
> half integer in rA
>
> (rD)[8:15]  <- (rA)[0:7]
> (rD)[7:0]   <- (rA)[8:15]
> (rD)[24:31] <- (rA)[16:23]
> (rD)[16:23] <- (rA)[24:31]
>
> Correct the microblaze bswaphi2 insn pattern to be a swapb followed
> by swaph
>
> Changelog entry would be:
>
> 2013-07-15  David Holsgrove <david.holsgrove@xilinx.com>
>
>  * gcc/config/microblaze/microblaze.md: Fix bswaphi2
>
>
> Can this also be backported to the gcc-4_8-branch?
>
> thanks,
> David

Attachment: 0002-Patch-microblaze-Fix-bswaphi2-implementation.patch
Description: Binary data


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