On Sun, Nov 8, 2015 at 4:37 PM, Michael Meissner <meiss...@linux.vnet.ibm.com> wrote: > This patch adds support for scalar count trailing zeros instruction that is > being added to ISA 3.0 (power9). > > I have built this patch (along with patches #2 and #4) with a bootstrap build > on a power8 little endian system. There were no regressions in the test > suite. Is this patch ok to install in the trunk once patch #1 has been > installed. > > [gcc] > 2015-11-08 Michael Meissner <meiss...@linux.vnet.ibm.com> > > * config/rs6000/rs6000.c (rs6000_rtx_costs): Update costs for > count trailing zero instruction if we have hardware support. > > * config/rs6000/rs6000.h (TARGET_CTZ): Add support for count > trailing zero instruction in ISA 3.0. > * config/rs6000/rs6000.c (ctz<mode>2): Likewise. > (ctz<mode>2_h): Likewise. > > [gcc/testsuite] > 2015-11-08 Michael Meissner <meiss...@linux.vnet.ibm.com> > > * gcc.target/powerpc/ctz-1.c: Add test for count trailing zero > instruciton support. > * gcc.target/powerpc/ctz-2.c: Likewise.
This is okay. We can address the attribute at a later time if necessary. Please re-check CTZ_DEFINED_VALUE_AT_ZERO. Thanks, David
