Re: [PATCH][AArch64] Change representation of SABD in RTL

2019-02-07 Thread Kyrill Tkachov
Hi James, On 06/02/19 17:33, James Greenhalgh wrote: On Mon, Feb 04, 2019 at 04:23:32AM -0600, Kyrill Tkachov wrote: Hi all, Richard raised a concern about the RTL we use to represent the AdvSIMD SABD (vector signed absolute difference) instruction. We currently represent it as ABS (MINUS op1

Re: [PATCH][AArch64] Change representation of SABD in RTL

2019-02-06 Thread James Greenhalgh
On Mon, Feb 04, 2019 at 04:23:32AM -0600, Kyrill Tkachov wrote: > Hi all, > > Richard raised a concern about the RTL we use to represent the AdvSIMD SABD > (vector signed absolute difference) instruction. > We currently represent it as ABS (MINUS op1 op2). > > This isn't exactly what SABD does. A