Commit 90efc404 authored by Øyvind Harboe's avatar Øyvind Harboe
Browse files

zy1000: jtag_add_dr_scan() performance improvement



Reduce overhead in jtag_add_dr_scan() a bit.
Signed-off-by: default avatarØyvind Harboe <oyvind.harboe@zylin.com>
parent c21c740a
......@@ -650,22 +650,29 @@ int interface_jtag_add_dr_scan(int num_fields, const struct scan_field *fields,
for (j = 0; j < num_fields; j++)
{
/* Find a range of fields to write to this tap */
if (tap == fields[j].tap)
{
found = 1;
int i;
for (i = j + 1; i < num_fields; i++)
{
if (tap != fields[j].tap)
{
break;
}
}
scanFields(i - j, fields + j, TAP_DRSHIFT, pause);
scanFields(1, fields+j, TAP_DRSHIFT, pause);
j = i;
}
}
if (!found)
{
struct scan_field tmp;
/* program the scan field to 1 bit length, and ignore it's value */
tmp.num_bits = 1;
tmp.out_value = NULL;
tmp.in_value = NULL;
scanFields(1, &tmp, TAP_DRSHIFT, pause);
/* Shift out a 0 for disabled tap's */
shiftValueInner(TAP_DRSHIFT, pause?TAP_DRPAUSE:TAP_DRSHIFT, 1, 0);
}
else
{
......
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment