Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx> writes: > On Tue, Nov 24, 2015 at 11:38:53AM +0100, Arnd Bergmann wrote: >> I suggested using -mcpu=cortex-a15 because there are old gcc versions >> that don't know about -march=armv7ve or -march=armv7-a+idiv yet, but >> that do understand -mcpu=cortex-a15. > > That's not all. The bigger problem is that there are toolchains out > there which accept these options, but do _not_ support IDIV in either > ARM or Thumb mode. I'm afraid that makes it impossible to add this > feature to the mainline kernel in this form: we need to run a test > build to check that -march=armv7ve or what-not really does work > through both GCC and GAS. If the compiler accepts the option but doesn't actually emit any div instructions, is there any real harm? -- Måns Rullgård mans@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
