On 19/05/15 13:48, Ramana Radhakrishnan wrote: > Hardware Integer divide instructions do not trap. Define this to be so > for the ARM port. > > Applied to trunk after a build and test across architecture ranges and a > bootstrap and regression run on a Cortex-A15 - a v7ve core that has > hardware divide instructions. > > A patch for AArch64 follows. > > regards > Ramana > > 2015-05-17 Ramana Radhakrishnan <ramana.radhakrish...@arm.com> > > * configure.host: Define cpu_defines_dir for ARM. > * config/cpu/arm/cpu_defines.h: New file. >
+#ifdef __ARM_ARCH_EXT_IDIV__ +#define __glibcxx_integral_traps false +#else +#define __glibcxx_integral_traps true +#endif Hmm, I wonder if we should always define this to false. If we're building on an architecture that doesn't have division, we'll call a library function; but if that is picked at link time, and the link time options suggest that hw division is available, we could end up with a library function that doesn't trap. R.
