Vortex 2.0 changes:

+ Microarchitecture optimizations + 64-bit support + Xilinx FPGA support + LLVM-16 support + Refactoring and quality control fixes minor update minor update minor update minor update minor update minor update cleanup cleanup cache bindings and memory perf refactory minor update minor update hw unit tests fixes minor update minor update minor update minor update minor update minor udpate minor update minor update minor update minor update minor update minor update minor update minor updates minor updates minor update minor update minor update minor update minor update minor update minor updates minor updates minor updates minor updates minor update minor update
2023-10-19 20:51:22 -07:00
parent d69a64c32c
commit c1e168fdbe
1309 changed files with 247412 additions and 311463 deletions
--- a/hw/rtl/libs/VX_allocator.sv
+++ b/hw/rtl/libs/VX_allocator.sv
@@ -0,0 +1,87 @@
+// 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
+module VX_allocator #(
+    parameter SIZE  = 1,
+    parameter ADDRW = `LOG2UP(SIZE)
+) (
+    input  wire             clk,
+    input  wire             reset,
+
+    input  wire             acquire_en,    
+    output wire [ADDRW-1:0] acquire_addr,      
+    
+    input  wire             release_en,
+    input  wire [ADDRW-1:0] release_addr,    
+    
+    output wire             empty,
+    output wire             full    
+);
+    reg [SIZE-1:0] free_slots, free_slots_n;
+    reg [ADDRW-1:0] acquire_addr_r;
+    reg empty_r, full_r;    
+    wire [ADDRW-1:0] free_index;
+    wire free_valid;
+
+    always @(*) begin
+        free_slots_n = free_slots;
+        if (release_en) begin
+            free_slots_n[release_addr] = 1;                
+        end
+        if (acquire_en) begin
+            free_slots_n[acquire_addr_r] = 0;
+        end            
+    end
+
+    VX_lzc #(
+        .N (SIZE),
+        .REVERSE (1)
+    ) free_slots_sel (
+        .data_in   (free_slots_n),
+        .data_out  (free_index),
+        .valid_out (free_valid)
+    );  
+
+    always @(posedge clk) begin
+        if (reset) begin
+            acquire_addr_r <= ADDRW'(1'b0);
+            free_slots     <= {SIZE{1'b1}};
+            empty_r        <= 1'b1;
+            full_r         <= 1'b0;            
+        end else begin
+            if (release_en) begin
+                `ASSERT(0 == free_slots[release_addr], ("%t: releasing invalid addr %d", $time, release_addr));
+            end
+            if (acquire_en) begin                
+                `ASSERT(~full_r, ("%t: allocator is full", $time));
+            end            
+            
+            if (acquire_en || (release_en && full_r)) begin
+                acquire_addr_r <= free_index;
+            end
+
+            free_slots <= free_slots_n;           
+            empty_r    <= (& free_slots_n);
+            full_r     <= ~free_valid;
+        end        
+    end
+        
+    assign acquire_addr = acquire_addr_r;
+    assign empty        = empty_r;
+    assign full         = full_r;
+    
+endmodule
+`TRACING_ON