On 2017-07-11 09:21, Eric Botcazou wrote:
Applied without the undocumented tweaks to the divdf3_fix and sqrtdf2_fix
patterns. Why are 2 nops necessary here? The stored value doesn't matter.
And the length attribute should be adjusted if nops are added to the pattern.
The first nop was added
> 2017-07-07 Daniel Cederman
>
> * config/sparc/sparc.c (sparc_do_work_around_errata): Insert NOP
> instructions to prevent sequences that can trigger the store-store
> errata for certain LEON3FT processors.
> (sparc_option_override): -mfix-ut699, -mfix-ut700, and
>
This patch adds a workaround to the Sparc backend for the LEON3FT
store-store errata. It is enabled when using the -mfix-ut699,
-mfix-ut700, or -mfix-gr712rc flag.
The workaround inserts NOP instructions to prevent the following two
instruction sequences from being generated:
std -> stb/sth/st/st
