diff options
Diffstat (limited to 'rtl/core/control/writeback.sv')
| -rw-r--r-- | rtl/core/control/writeback.sv | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/rtl/core/control/writeback.sv b/rtl/core/control/writeback.sv index 5d6d7c6..f28e9a9 100644 --- a/rtl/core/control/writeback.sv +++ b/rtl/core/control/writeback.sv @@ -31,8 +31,7 @@ module core_control_writeback final_writeback, update_flags, final_update_flags, - output word wr_value, - output psr_flags wb_alu_flags + output word wr_value ); reg_num last_rd; @@ -79,6 +78,12 @@ module core_control_writeback wr_value = vector; else if(next_cycle.mul_hi_wb) wr_value = mul_q_hi; + + update_flags = 0; + if(next_cycle.issue) + update_flags = final_update_flags; + else if(next_cycle.exception) + update_flags = 0; end always_ff @(posedge clk or negedge rst_n) @@ -86,14 +91,9 @@ module core_control_writeback last_rd <= 0; final_rd <= 0; final_writeback <= 0; - - update_flags <= 0; final_update_flags <= 0; - - wb_alu_flags <= {$bits(wb_alu_flags){1'b0}}; end else begin last_rd <= rd; - wb_alu_flags <= alu_flags; if(next_cycle.issue) final_rd <= dec.data.rd; @@ -110,12 +110,6 @@ module core_control_writeback else if(next_cycle.exception) final_writeback <= 1; - update_flags <= 0; - if(next_cycle.issue) - update_flags <= final_update_flags; - else if(next_cycle.exception) - update_flags <= 0; - if(next_cycle.issue) final_update_flags <= issue && dec.psr.update_flags; else if(next_cycle.exception) |