1 files changed, 22 insertions, 0 deletions
diff --git a/src/panfrost/midgard/disassemble.c b/src/panfrost/midgard/disassemble.c
index 93e11667749..8c7f718674f 100644
--- a/src/panfrost/midgard/disassemble.c
+++ b/src/panfrost/midgard/disassemble.c
@@ -49,6 +49,28 @@ static bool is_instruction_int = false;
 
 static struct midgard_disasm_stats midg_stats;
 
+/* Transform 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;
+}
+
 static void
 print_alu_opcode(FILE *fp, midgard_alu_op op)
 {