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intel/fs: Separate SLM size calculation from encoding 

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8486>
This commit is contained in:
Caio Marcelo de Oliveira Filho 2020-06-25 13:58:36 -07:00 committed by Marge Bot
parent 9c38cbbb96
commit 77aa86a521
1 changed files with 21 additions and 7 deletions
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28
src/intel/compiler/brw_compiler.h
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@ -1581,6 +1581,19 @@ void brw_debug_key_recompile(const struct brw_compiler *c, void *log,
const struct brw_base_prog_key *old_key,
const struct brw_base_prog_key *key);
/* Shared Local Memory Size is specified as powers of two,
* and also have a Gen-dependent minimum value if not zero.
*/
static inline uint32_t
calculate_gen_slm_size(unsigned gen, uint32_t bytes)
{
assert(bytes <= 64 * 1024);
if (bytes > 0)
return MAX2(util_next_power_of_two(bytes), gen >= 9 ? 1024 : 4096);
else
return 0;
}
static inline uint32_t
encode_slm_size(unsigned gen, uint32_t bytes)
{
@ -1595,18 +1608,19 @@ encode_slm_size(unsigned gen, uint32_t bytes)
* -------------------------------------------------------------------
* Gen9+ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
*/
assert(bytes <= 64 * 1024);
if (bytes > 0) {
/* Shared Local Memory Size is specified as powers of two. */
slm_size = util_next_power_of_two(bytes);
slm_size = calculate_gen_slm_size(gen, bytes);
assert(util_is_power_of_two_nonzero(slm_size));
if (gen >= 9) {
/* Use a minimum of 1kB; turn an exponent of 10 (1024 kB) into 1. */
slm_size = ffs(MAX2(slm_size, 1024)) - 10;
/* Turn an exponent of 10 (1024 kB) into 1. */
assert(slm_size >= 1024);
slm_size = ffs(slm_size) - 10;
} else {
/* Use a minimum of 4kB; convert to the pre-Gen9 representation. */
slm_size = MAX2(slm_size, 4096) / 4096;
assert(slm_size >= 4096);
/* Convert to the pre-Gen9 representation. */
slm_size = slm_size / 4096;
}
}