wu-arch/vortex
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

using onehot multiplexer to reduce critical path

Browse Source
This commit is contained in:
Blaise Tine
2021-07-08 00:26:59 -07:00
parent dc34c5c5bd
commit 10e9ee124b
11 changed files with 161 additions and 207 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
hw/rtl/libs/VX_stream_arbiter.v
View File

@@ -24,8 +24,7 @@ module VX_stream_arbiter #(
if (NUM_REQS > 1) begin
wire sel_valid;
wire sel_ready;
wire [LOG_NUM_REQS-1:0] sel_idx;
wire [NUM_REQS-1:0] sel_1hot;
wire [NUM_REQS-1:0] sel_1hot;
if (TYPE == "X") begin
VX_fixed_arbiter #(
@@ -37,8 +36,8 @@ module VX_stream_arbiter #(
.requests (valid_in),
.enable (sel_ready),
.grant_valid (sel_valid),
.grant_index (sel_idx),
.grant_onehot (sel_1hot)
.grant_onehot (sel_1hot),
`UNUSED_PIN (grant_index)
);
end else if (TYPE == "R") begin
VX_rr_arbiter #(
@@ -50,8 +49,8 @@ module VX_stream_arbiter #(
.requests (valid_in),
.enable (sel_ready),
.grant_valid (sel_valid),
.grant_index (sel_idx),
.grant_onehot (sel_1hot)
.grant_onehot (sel_1hot),
`UNUSED_PIN (grant_index)
);
end else if (TYPE == "F") begin
VX_fair_arbiter #(
@@ -63,8 +62,8 @@ module VX_stream_arbiter #(
.requests (valid_in),
.enable (sel_ready),
.grant_valid (sel_valid),
.grant_index (sel_idx),
.grant_onehot (sel_1hot)
.grant_onehot (sel_1hot),
`UNUSED_PIN (grant_index)
);
end else if (TYPE == "M") begin
VX_matrix_arbiter #(
@@ -76,13 +75,24 @@ module VX_stream_arbiter #(
.requests (valid_in),
.enable (sel_ready),
.grant_valid (sel_valid),
.grant_index (sel_idx),
.grant_onehot (sel_1hot)
.grant_onehot (sel_1hot),
`UNUSED_PIN (grant_index)
);
end else begin
$error ("invalid parameter");
end
wire [DATAW-1:0] data_in_sel;
VX_onehot_mux #(
.DATAW (DATAW),
.COUNT (NUM_REQS)
) data_in_mux (
.data_in (data_in),
.sel_in (sel_1hot),
.data_out (data_in_sel)
);
VX_skid_buffer #(
.DATAW (DATAW),
.PASSTHRU (!BUFFERED)
@@ -90,7 +100,7 @@ module VX_stream_arbiter #(
.clk (clk),
.reset (reset),
.valid_in (sel_valid),
.data_in (data_in[sel_idx]),
.data_in (data_in_sel),
.ready_in (sel_ready),
.valid_out (valid_out),
.data_out (data_out),