[1/2] Re-format zen memcpy/memset costs.

The patch improves readability of the memcpy and memset
expansion strategies.

gcc/ChangeLog:

	* config/i386/x86-tune-costs.h: Change code formatting.
---
  gcc/config/i386/x86-tune-costs.h | 38 +++++++++++++++++++++++---------
  1 file changed, 28 insertions(+), 10 deletions(-)

> The patch improves readability of the memcpy and memset
> expansion strategies.
> 
> gcc/ChangeLog:
> 
> 	* config/i386/x86-tune-costs.h: Change code formatting.

OK,
thanks!
Honza
> ---
>  gcc/config/i386/x86-tune-costs.h | 38 +++++++++++++++++++++++---------
>  1 file changed, 28 insertions(+), 10 deletions(-)
> 
> diff --git a/gcc/config/i386/x86-tune-costs.h b/gcc/config/i386/x86-tune-costs.h
> index c73917e5a62..1169178433f 100644
> --- a/gcc/config/i386/x86-tune-costs.h
> +++ b/gcc/config/i386/x86-tune-costs.h
> @@ -1311,14 +1311,23 @@ const struct processor_costs bdver_cost = {
>      very small blocks it is better to use loop.  For large blocks, libcall
>      can do nontemporary accesses and beat inline considerably.  */
>  static stringop_algs znver1_memcpy[2] = {
> -  {libcall, {{6, loop, false}, {14, unrolled_loop, false},
> +  /* 32-bit tuning.  */
> +  {libcall, {{6, loop, false},
> +	     {14, unrolled_loop, false},
>  	     {-1, rep_prefix_4_byte, false}}},
> -  {libcall, {{16, loop, false}, {8192, rep_prefix_8_byte, false},
> +  /* 64-bit tuning.  */
> +  {libcall, {{16, loop, false},
> +	     {8192, rep_prefix_8_byte, false},
>  	     {-1, libcall, false}}}};
>  static stringop_algs znver1_memset[2] = {
> -  {libcall, {{8, loop, false}, {24, unrolled_loop, false},
> -	     {2048, rep_prefix_4_byte, false}, {-1, libcall, false}}},
> -  {libcall, {{48, unrolled_loop, false}, {8192, rep_prefix_8_byte, false},
> +  /* 32-bit tuning.  */
> +  {libcall, {{8, loop, false},
> +	     {24, unrolled_loop, false},
> +	     {2048, rep_prefix_4_byte, false},
> +	     {-1, libcall, false}}},
> +  /* 64-bit tuning.  */
> +  {libcall, {{48, unrolled_loop, false},
> +	     {8192, rep_prefix_8_byte, false},
>  	     {-1, libcall, false}}}};
>  struct processor_costs znver1_cost = {
>    {
> @@ -1448,14 +1457,23 @@ struct processor_costs znver1_cost = {
>      very small blocks it is better to use loop.  For large blocks, libcall
>      can do nontemporary accesses and beat inline considerably.  */
>  static stringop_algs znver2_memcpy[2] = {
> -  {libcall, {{6, loop, false}, {14, unrolled_loop, false},
> +  /* 32-bit tuning.  */
> +  {libcall, {{6, loop, false},
> +	     {14, unrolled_loop, false},
>  	     {-1, rep_prefix_4_byte, false}}},
> -  {libcall, {{16, loop, false}, {64, rep_prefix_4_byte, false},
> +  /* 64-bit tuning.  */
> +  {libcall, {{16, loop, false},
> +	     {64, rep_prefix_4_byte, false},
>  	     {-1, libcall, false}}}};
>  static stringop_algs znver2_memset[2] = {
> -  {libcall, {{8, loop, false}, {24, unrolled_loop, false},
> -	     {2048, rep_prefix_4_byte, false}, {-1, libcall, false}}},
> -  {libcall, {{24, rep_prefix_4_byte, false}, {128, rep_prefix_8_byte, false},
> +  /* 32-bit tuning.  */
> +  {libcall, {{8, loop, false},
> +	     {24, unrolled_loop, false},
> +	     {2048, rep_prefix_4_byte, false}
> +	     {-1, libcall, false}}},
> +  /* 64-bit tuning.  */
> +  {libcall, {{24, rep_prefix_4_byte, false},
> +	     {128, rep_prefix_8_byte, false},
>  	     {-1, libcall, false}}}};
>  struct processor_costs znver2_cost = {
> -- 
> 2.26.2
> 
>