On Tue, 27 Aug 2013 19:41:09 +0200 Uros Bizjak <ubiz...@gmail.com> wrote:
> On Tue, Aug 27, 2013 at 7:36 PM, H.J. Lu <hjl.to...@gmail.com> wrote: > > >>> As reported in [1] the host processor detection has not yet been updated > >>> to recognize Intel Ivy Bridge and Haswell processors. > >>> This small patch adds the detection of these processors and assumes > >>> core-avx2 as march for unknown processors of the PENTIUMPRO family that > >>> support AVX2. > >> > >> I have committed slightly improved (attached) patch that uses > >> core-avx-i for IvyBridge and adds another IvyBridge model number. > >> While there, I also reordered a bunch of statements. > >> > >> Thanks, > >> Uros. > > > > Page C-3 in ntel optimization guide shows: > > > > 06_3CH, 06_45H, 06_46H Intel microarchitecture Haswell > > 06_3AH, 06_3EH Intel microarchitecture Ivy Bridge > > 06_2AH, 06_2DH Intel microarchitecture Sandy Bridge > > 06_25H, 06_2CH, 06_2FH Intel microarchitecture Westmere > > 06_1AH, 06_1EH, 06_1FH, Intel microarchitecture Nehalem > > 06_2EH > > 06_17H, 06_1DH Enhanced Intel Core microarchitecture > > 06_0FH Intel Core microarchitecture > > > > At least, we should add 0x45 and 0x46 to Haswell. > > OK, the patch is pre-approved. Can these changes be backported to 4.8 and the Ivy Bridge parts to 4.7 as well? We've had a couple reports of bad -march=native results for Haswell on 4.7. I can file PRs if you're interested. -- Ryan Hill psn: dirtyepic_sk gcc-porting/toolchain/wxwidgets @ gentoo.org 47C3 6D62 4864 0E49 8E9E 7F92 ED38 BD49 957A 8463
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