Answers Database
XNFPREP 5.0: ERROR 3609 with XBLOX designs with carrylogic and rloc_range
Record #407
Problem Title:
XNFPREP 5.0: ERROR 3609 with XBLOX designs with carrylogic and rloc_range
Problem Description:
Solution 1:
PROGRAM:
XNFPREP 5.0.0
PROBLEM:
XBLOX will implement counters and other components (add_sub) with
carry logic. If the RLOC_RANGE attribute is placed on the component,
XBLOX will then place the RLOC_RANGE attribute on all the primitives
it creates to implement that component. In the case of a add_sub, there
will be CY4_XX symbols that will have the RLOC_RANGE applied, but no
RLOC. This is then flagged in XNFPREP with the following error:
XNFPREP: ERROR 3609:
The symbol '$1i36/CY_MODE_0' (type = CY4_37, output signal =
$1i36/CY_MODE_SIG_2_0) has RLOC_RANGE parameter, however it does
not have any RLOC parameter.
This is obviously an error, but not one created by the user.
NOTE: In XBLOX 5.0, carry logic is used for components
if there width is 13 or greater. So a counter
that is 12 bits will NOT be implemented with carry
logic.
WORKAROUND:
Edit the .xg file. Delete the RLOC_RANGE attribute from the SYMs that do NOT
have RLOC attributes on them.
End of Record #407 - Last Modified: 04/01/97 07:47 |
