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)
{
* -------------------------------------------------------------------
* 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;
}
}