diff options
Diffstat (limited to 'picorv32.v')
| -rw-r--r-- | picorv32.v | 26 |
1 files changed, 22 insertions, 4 deletions
@@ -27,7 +27,8 @@ module picorv32 #( parameter ENABLE_COUNTERS = 1, - parameter ENABLE_REGS_16_31 = 1 + parameter ENABLE_REGS_16_31 = 1, + parameter ENABLE_REGS_DUALPORT = 1 ) ( input clk, resetn, output reg trap, @@ -529,6 +530,21 @@ module picorv32 #( reg_op2 <= decoded_imm; mem_do_rinst <= mem_do_prefetch; cpu_state <= cpu_state_exec; + end else if (ENABLE_REGS_DUALPORT) begin +`ifdef DEBUG + $display("LD_RS2: %2d 0x%08x", decoded_rs2, decoded_rs2 ? cpuregs[decoded_rs2] : 0); +`endif + reg_op2 <= decoded_rs2 ? cpuregs[decoded_rs2] : 0; + if (is_sb_sh_sw) begin + cpu_state <= cpu_state_stmem; + mem_do_rinst <= 1; + end else if (is_sll_srl_sra) begin + reg_sh <= decoded_rs2 ? cpuregs[decoded_rs2] : 0; + cpu_state <= cpu_state_shift; + end else begin + mem_do_rinst <= mem_do_prefetch; + cpu_state <= cpu_state_exec; + end end else cpu_state <= cpu_state_ld_rs2; end @@ -689,7 +705,8 @@ endmodule module picorv32_axi #( parameter ENABLE_COUNTERS = 1, - parameter ENABLE_REGS_16_31 = 1 + parameter ENABLE_REGS_16_31 = 1, + parameter ENABLE_REGS_DUALPORT = 1 ) ( input clk, resetn, output trap, @@ -756,8 +773,9 @@ module picorv32_axi #( ); picorv32 #( - .ENABLE_COUNTERS (ENABLE_COUNTERS ), - .ENABLE_REGS_16_31(ENABLE_REGS_16_31) + .ENABLE_COUNTERS (ENABLE_COUNTERS ), + .ENABLE_REGS_16_31 (ENABLE_REGS_16_31 ), + .ENABLE_REGS_DUALPORT(ENABLE_REGS_DUALPORT) ) picorv32_core ( .clk (clk ), .resetn (resetn ), |