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Vortex 2.0 changes:

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+ Microarchitecture optimizations
+ 64-bit support
+ Xilinx FPGA support
+ LLVM-16 support
+ Refactoring and quality control fixes
This commit is contained in:
Blaise Tine
2023-10-19 20:51:22 -07:00
parent d69a64c32c
commit d47cccc157
1300 changed files with 247321 additions and 311189 deletions
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50
hw/rtl/libs/VX_priority_encoder.sv
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@@ -1,3 +1,16 @@
// Copyright © 2019-2023
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
`include "VX_platform.vh"
`TRACING_OFF
@@ -14,7 +27,7 @@ module VX_priority_encoder #(
);
wire [N-1:0] reversed;
if (REVERSE) begin
if (REVERSE != 0) begin
for (genvar i = 0; i < N; ++i) begin
assign reversed[N-i-1] = data_in[i];
end
@@ -25,7 +38,7 @@ module VX_priority_encoder #(
if (N == 1) begin
assign onehot = reversed;
assign index = 0;
assign index = '0;
assign valid_out = reversed;
end else if (N == 2) begin
@@ -47,11 +60,12 @@ module VX_priority_encoder #(
);
VX_lzc #(
.N (N)
.N (N),
.REVERSE (1)
) lzc (
.in_i (reversed),
.cnt_o (index),
`UNUSED_PIN (valid_o)
.data_in (reversed),
.data_out (index),
`UNUSED_PIN (valid_out)
);
assign onehot = scan_lo & {(~scan_lo[N-2:0]), 1'b1};
@@ -67,23 +81,25 @@ module VX_priority_encoder #(
assign onehot[N-1:0] = reversed[N-1:0] & ~higher_pri_regs[N-1:0];
VX_lzc #(
.N (N)
.N (N),
.REVERSE (1)
) lzc (
.in_i (reversed),
.cnt_o (index),
.valid_o (valid_out)
.data_in (reversed),
.data_out (index),
.valid_out (valid_out)
);
end else if (MODEL == 3) begin
assign onehot = reversed & ~(reversed-1);
assign onehot = reversed & -reversed;
VX_lzc #(
.N (N)
.N (N),
.REVERSE (1)
) lzc (
.in_i (reversed),
.cnt_o (index),
.valid_o (valid_out)
.data_in (reversed),
.data_out (index),
.valid_out (valid_out)
);
end else begin
@@ -97,7 +113,7 @@ module VX_priority_encoder #(
for (integer i = N-1; i >= 0; --i) begin
if (reversed[i]) begin
index_r = LN'(i);
onehot_r = 0;
onehot_r = '0;
onehot_r[i] = 1'b1;
end
end
@@ -110,4 +126,4 @@ module VX_priority_encoder #(
end
endmodule
`TRACING_ON
`TRACING_ON