Merge remote-tracking branch 'rv64cpu-import/master'

1 files changed, 41 insertions, 0 deletions

diff --git a/rv64cpu/rtl/core/registers/fpr_file.sv b/rv64cpu/rtl/core/registers/fpr_file.sv
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+++ b/rv64cpu/rtl/core/registers/fpr_file.sv
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+//     Richard CPU
+//     Copyright (C) 2026  Richard Qin
+
+// File path: rtl/core/fp_regfile.sv
+// Description: 32-entry 64-bit floating-point register file for RV64F/RV64D.
+
+module fpr_file
+    import rv64_pkg::*;
+(
+    input  logic            clk,
+    input  logic            rst,
+
+    input  logic [4:0]      fs1_addr,
+    input  logic [4:0]      fs2_addr,
+    input  logic [4:0]      fs3_addr,
+    output logic [XLEN-1:0] fs1_rdata,
+    output logic [XLEN-1:0] fs2_rdata,
+    output logic [XLEN-1:0] fs3_rdata,
+
+    input  logic            fp_write_en,
+    input  logic [4:0]      fd_addr,
+    input  logic [XLEN-1:0] fd_wdata
+);
+
+    logic [XLEN-1:0] regs [0:31];
+
+    assign fs1_rdata = (fp_write_en && (fs1_addr == fd_addr)) ? fd_wdata : regs[fs1_addr];
+    assign fs2_rdata = (fp_write_en && (fs2_addr == fd_addr)) ? fd_wdata : regs[fs2_addr];
+    assign fs3_rdata = (fp_write_en && (fs3_addr == fd_addr)) ? fd_wdata : regs[fs3_addr];
+
+    always_ff @(posedge clk) begin
+        if (rst) begin
+            for (int unsigned reg_idx = 0; reg_idx < 32; reg_idx++) begin
+                regs[reg_idx] <= '0;
+            end
+        end else if (fp_write_en) begin
+            regs[fd_addr] <= fd_wdata;
+        end
+    end
+
+endmodule