fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-01-16 13:40:29 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

panfrost: Add routines to calculate stack size/shift

Browse source 
These implement the aforementioned formulas.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-12-09 09:00:24 -05:00
parent e6f8ef93ca
commit eac9247b2d
2 changed files with 31 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
src/panfrost/encoder/pan_encoder.h
View file

@ -66,4 +66,15 @@ panfrost_choose_hierarchy_mask(
unsigned width, unsigned height,
unsigned vertex_count, bool hierarchy);
/* Stack sizes */
unsigned
panfrost_get_stack_shift(unsigned stack_size);
unsigned
panfrost_get_total_stack_size(
unsigned stack_shift,
unsigned threads_per_core,
unsigned core_count);
#endif

20
src/panfrost/encoder/pan_scratch.c
View file

@ -77,3 +77,23 @@
* There are other valid characterisations of this formula, of course, but this
* is computationally simple, so good enough for our purposes.
*/
/* Computes log_stack_size = ceil(log2(max(s, 256))) - 4 */
unsigned
panfrost_get_stack_shift(unsigned stack_size)
{
return util_logbase2_ceil(MAX2(stack_size, 256)) - 4;
}
/* Computes the aligned stack size given the shift and thread count */
unsigned
panfrost_get_total_stack_size(
unsigned stack_shift,
unsigned threads_per_core,
unsigned core_count)
{
unsigned stack_size = 1 << (stack_shift + 4);
return stack_size * threads_per_core * core_count;
}