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Change default switch addressing to use MSBs of tdest

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This commit is contained in:
Alex Forencich 2019-07-25 00:40:13 -07:00
parent 76c805e416
commit 592ae7e6a2
1 changed files with 3 additions and 3 deletions
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6
rtl/axis_switch.v
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@ -55,7 +55,7 @@ module axis_switch #
// Output interface routing base tdest selection
// Concatenate M_COUNT DEST_WIDTH sized constants
// Port selected if M_BASE <= tdest <= M_TOP
// set to zero for default routing with tdest as port index
// set to zero for default routing with tdest MSBs as port index
parameter M_BASE = 0,
// Output interface routing top tdest selection
// Concatenate M_COUNT DEST_WIDTH sized constants
@ -188,8 +188,8 @@ generate
drop_next = 1'b1;
for (k = 0; k < M_COUNT; k = k + 1) begin
if (M_BASE == 0) begin
// M_BASE is zero, route with tdest as port index
if (int_s_axis_tdest[m*DEST_WIDTH +: DEST_WIDTH] == k && (M_CONNECT & (1 << (m+k*S_COUNT)))) begin
// M_BASE is zero, route with $clog2(M_COUNT) MSBs of tdest as port index
if (int_s_axis_tdest[m*DEST_WIDTH+(DEST_WIDTH-CL_M_COUNT) +: CL_M_COUNT] == k && (M_CONNECT & (1 << (m+k*S_COUNT)))) begin
select_next = k;
select_valid_next = 1'b1;
drop_next = 1'b0;