intel: decoder: extract instruction/structs length

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Scott D Phillips <scott.d.phillips@intel.com>

src/intel/common/gen_decoder.c

@@ -162,6 +162,13 @@ create_group(struct parser_context *ctx,
    group->spec = ctx->spec;
    group->variable = false;
 
+   for (int i = 0; atts[i]; i += 2) {
+      char *p;
+      if (strcmp(atts[i], "length") == 0) {
+         group->dw_length = strtoul(atts[i + 1], &p, 0);
+      }
+   }
+
    if (parent) {
       group->parent = parent;
       get_group_offset_count(atts,

src/intel/common/gen_decoder.h

@@ -87,6 +87,7 @@ struct gen_group {
 
    struct gen_field *fields; /* linked list of fields */
 
+   uint32_t dw_length;
    uint32_t group_offset, group_count;
    uint32_t group_size;
    bool variable;