The iterator code already computed this value, then we stored it in
the structure name, strtok'd it back out, and also manually computed
it when printing dword headers.

Just put the value in the struct and use it.  Way simpler.
---
 src/intel/tools/aubinator.c | 35 +++++++++++++----------------------
 src/intel/tools/decoder.c   |  8 ++++----
 src/intel/tools/decoder.h   |  1 +
 3 files changed, 18 insertions(+), 26 deletions(-)

diff --git a/src/intel/tools/aubinator.c b/src/intel/tools/aubinator.c
index 1f6a1fe4b1d..fc2efd3e46e 100644
--- a/src/intel/tools/aubinator.c
+++ b/src/intel/tools/aubinator.c
@@ -96,23 +96,14 @@ valid_offset(uint32_t offset)
 }
 
 static void
-print_dword_val(struct gen_field_iterator *iter, uint64_t offset,
-                int *dword_num)
+print_dword_header(struct gen_field_iterator *iter, uint64_t offset)
 {
-   struct gen_field *f;
-
-   f = iter->group->fields[iter->i - 1];
-   const int dword = f->start / 32;
-
-   if (*dword_num != dword) {
-      fprintf(outfile, "0x%08"PRIx64":  0x%08x : Dword %d\n",
-              offset + 4 * dword,  iter->p[dword], dword);
-      *dword_num = dword;
-   }
+   fprintf(outfile, "0x%08"PRIx64":  0x%08x : Dword %d\n",
+           offset + 4 * iter->dword, iter->p[iter->dword], iter->dword);
 }
 
 static char *
-print_iterator_values(struct gen_field_iterator *iter, int *idx)
+print_iterator_values(struct gen_field_iterator *iter)
 {
     char *token = NULL;
     if (strstr(iter->value, "struct") == NULL) {
@@ -121,7 +112,6 @@ print_iterator_values(struct gen_field_iterator *iter, int 
*idx)
         token = strtok(iter->value, " ");
         if (token != NULL) {
             token = strtok(NULL, " ");
-            *idx = atoi(strtok(NULL, ">"));
         } else {
             token = NULL;
         }
@@ -136,7 +126,7 @@ decode_group(struct gen_spec *spec, struct gen_group *strct,
 {
    struct gen_field_iterator iter;
    char *token = NULL;
-   int idx = 0, dword_num = 0;
+   int last_dword = 0;
    uint64_t offset = 0;
 
    if (option_print_offsets)
@@ -147,15 +137,16 @@ decode_group(struct gen_spec *spec, struct gen_group 
*strct,
    gen_field_iterator_init(&iter, strct, p,
                            option_color == COLOR_ALWAYS);
    while (gen_field_iterator_next(&iter)) {
-      idx = 0;
-      print_dword_val(&iter, offset, &dword_num);
-      if (dword_num >= starting_dword)
-         token = print_iterator_values(&iter, &idx);
+      if (last_dword != iter.dword) {
+         print_dword_header(&iter, offset);
+         last_dword = iter.dword;
+      }
+      if (iter.dword >= starting_dword)
+         token = print_iterator_values(&iter);
       if (token != NULL) {
-         fprintf(outfile, "0x%08"PRIx64":  0x%08x : Dword %d\n",
-                 offset + 4 * idx, p[idx], idx);
+         print_dword_header(&iter, offset);
          struct gen_group *struct_val = gen_spec_find_struct(spec, token);
-         decode_group(spec, struct_val, &p[idx], 0);
+         decode_group(spec, struct_val, &p[iter.dword], 0);
          token = NULL;
       }
    }
diff --git a/src/intel/tools/decoder.c b/src/intel/tools/decoder.c
index e94c7387128..3e0b6a86d38 100644
--- a/src/intel/tools/decoder.c
+++ b/src/intel/tools/decoder.c
@@ -752,12 +752,12 @@ gen_field_iterator_next(struct gen_field_iterator *iter)
 
    f = iter->group->fields[iter->i++];
    iter->name = f->name;
-   int index = f->start / 32;
+   iter->dword = f->start / 32;
 
    if ((f->end - f->start) > 32)
-      v.qw = ((uint64_t) iter->p[index+1] << 32) | iter->p[index];
+      v.qw = ((uint64_t) iter->p[iter->dword+1] << 32) | iter->p[iter->dword];
    else
-      v.qw = iter->p[index];
+      v.qw = iter->p[iter->dword];
 
    const char *enum_name = NULL;
 
@@ -794,7 +794,7 @@ gen_field_iterator_next(struct gen_field_iterator *iter)
       break;
    case GEN_TYPE_STRUCT:
       snprintf(iter->value, sizeof(iter->value),
-               "<struct %s %d>", f->type.gen_struct->name, (f->start / 32));
+               "<struct %s %d>", f->type.gen_struct->name, iter->dword);
 
       break;
    case GEN_TYPE_UFIXED:
diff --git a/src/intel/tools/decoder.h b/src/intel/tools/decoder.h
index 7b14ef4a647..700ce21f033 100644
--- a/src/intel/tools/decoder.h
+++ b/src/intel/tools/decoder.h
@@ -55,6 +55,7 @@ struct gen_field_iterator {
    const char *name;
    char value[128];
    const uint32_t *p;
+   int dword; /**< current field starts at &p[dword] */
    int i;
    bool print_colors;
 };
-- 
2.12.0

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