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axi_dacfifo: Remove unused signals 

The dac_last signal is not used anywhere in the module. Remove it and its
synchronization registers.

Fixes the following warnings:
  [Synth 8-6014] Unused sequential element dac_dlast_reg was removed.  ["axi_dacfifo_rd.v":372]
  [Synth 8-6014] Unused sequential element dac_dlast_m1_reg was removed.  ["axi_dacfifo_rd.v":373]
  [Synth 8-6014] Unused sequential element dac_dlast_m2_reg was removed.  ["axi_dacfifo_rd.v":374]

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
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Lars-Peter Clausen 2018-05-30 10:22:39 +02:00 committed by Lars-Peter Clausen
parent 7f18fc5f1c
commit 97abb9d6ab
1 changed files with 0 additions and 9 deletions
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9
library/xilinx/axi_dacfifo/axi_dacfifo_rd.v
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@ -136,9 +136,6 @@ module axi_dacfifo_rd #(
reg [ 2:0] dac_xfer_req_m = 3'b0;
reg [ 3:0] dac_last_beats = 4'b0;
reg [ 3:0] dac_last_beats_m = 4'b0;
reg dac_dlast = 1'b0;
reg dac_dlast_m1 = 1'b0;
reg dac_dlast_m2 = 1'b0;
// internal signals
@ -369,9 +366,6 @@ module axi_dacfifo_rd #(
dac_mem_waddr_m2 <= 'b0;
dac_mem_laddr_toggle_m <= 4'b0;
dac_mem_laddr <= 'b0;
dac_dlast <= 1'b0;
dac_dlast_m1 <= 1'b0;
dac_dlast_m2 <= 1'b0;
end else begin
dac_mem_waddr_m1 <= axi_mem_waddr_g;
dac_mem_waddr_m2 <= dac_mem_waddr_m1;
@ -380,9 +374,6 @@ module axi_dacfifo_rd #(
dac_mem_laddr <= (dac_mem_laddr_toggle_m[2] ^ dac_mem_laddr_toggle_m[1]) ?
axi_mem_laddr_s :
dac_mem_laddr;
dac_dlast_m1 <= axi_dlast;
dac_dlast_m2 <= dac_dlast_m1;
dac_dlast <= dac_dlast_m2;
end
end