> 2017-11-17 Daniel Cederman <ceder...@gaisler.com>
>
> * config/sparc/sparc.c (fpop_reg_depend_p): New function.
> (div_sqrt_insn_p): New function.
> (sparc_do_work_around_errata): Insert NOP instructions to
> prevent sequences that could trigger the TN-0013 errata for
> certain LEON3 processors.
> (pass_work_around_errata::gate): Also test sparc_fix_tn0013.
> (sparc_option_override): Set sparc_fix_tn0013 appropriately.
> * config/sparc/sparc.md (fix_tn0013): New attribute.
> (in_branch_delay): Prevent div and sqrt in delay slot if fix_tn0013.
> * config/sparc/sparc.opt (sparc_fix_tn0013: New variable.
OK for mainline and 7 branch modulo:
> + /* Check if this is a problematic sequence. */
> + if (i > 1
> + && fp_found >= 2
> + && div_sqrt_insn_p (after))
> + {
> + /* If is this is the short version of the problematic
> + sequence we add two NOPs in a row to also prevent
> + the long version. */
> + if (i == 2)
> + emit_insn_before (gen_nop (), next);
> + insert_nop = true;
> + break;
> + }
Superfluous "is".
--
Eric Botcazou
