Critical Issue
Description
The LPM_CLSHIFT MegaWizard Plug-In Manager does not correctly set the shift direction.
Resolution
After you generate a left or right shifter with the MegaWizard
Plug-In Manager, manually modify the MegaWizard-generated wrapper
to add the direction.For example, add the direction line
as bolded below:
lpm_clshift LPM_CLSHIFT_component
( .data (data),
.distance (distance),.direction (1\'b1),.result
(sub_wire0)
// synopsys translate_off
,
.aclr (),
.clken (),
.clock (),
.overflow (),
.underflow ()
// synopsys translate_on?
);Note: VCC (1’b1) creates a right shifter; GND (1’b0) creates
a left shifter.