Hello! >> >>> 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. >> >> >> > 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.
I have backported all relevant patches to release branches (4.7, 4.8). Uros.
