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Diffstat (limited to 'src/panfrost/midgard/helpers.h')
| -rw-r--r-- | src/panfrost/midgard/helpers.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/panfrost/midgard/helpers.h b/src/panfrost/midgard/helpers.h index d2bfc18273e..66223f3fd78 100644 --- a/src/panfrost/midgard/helpers.h +++ b/src/panfrost/midgard/helpers.h @@ -254,6 +254,28 @@ expand_writemask(unsigned mask, unsigned channels) return o; } +/* Tansform an expanded writemask (duplicated 8-bit format) into its condensed + * form (one bit per component) */ + +static inline unsigned +condense_writemask(unsigned expanded_mask, + unsigned bits_per_component) +{ + if (bits_per_component == 8) + unreachable("XXX TODO: sort out how 8-bit constant encoding works"); + + unsigned slots_per_component = bits_per_component / 16; + unsigned max_comp = (16 * 8) / bits_per_component; + unsigned condensed_mask = 0; + + for (unsigned i = 0; i < max_comp; i++) { + if (expanded_mask & (1 << (i * slots_per_component))) + condensed_mask |= (1 << i); + } + + return condensed_mask; +} + /* Coerce structs to integer */ static inline unsigned |