comment about max_exponent, remove its use: use python slice [:-1]

[soc.git] / TLB / src / LFSR.py

diff --git a/TLB/src/LFSR.py b/TLB/src/LFSR.py
index c850d5fb9501166cc9c347c207bc4d978a21b6fd..d0c6322775fdfb049dc0242afbacc1f731ca0352 100644 (file)
--- a/TLB/src/LFSR.py
+++ b/TLB/src/LFSR.py
@@ -70,7 +70,8 @@ class LFSR(LFSRPolynomial):
 
             Outputs:
             -------
-            :state: the LFSR state.  length is taken from the polynomial
+            :state: the LFSR state.  bitwidth is taken from the polynomial
+                    maximum exponent.
 
             Note: if an LFSRPolynomial is passed in as the input, because
             LFSRPolynomial is derived from set() it's ok:
@@ -95,7 +96,7 @@ class LFSR(LFSRPolynomial):
         # if enabled, shift-and-feedback
         with m.If(self.enable):
             # shift up lower bits by Cat'ing in a new bit zero (feedback)
-            newstate = Cat(feedback, self.state[0:self.max_exponent - 1])
+            newstate = Cat(feedback, self.state[:-1])
             m.d.sync += self.state.eq(newstate)
 
         return m