URL https://opencores.org/ocsvn/neorv32/neorv32/trunk

Subversion Repositories neorv32

[/] [neorv32/] [trunk/] [rtl/] [core/] [neorv32_cpu_alu.vhd] - Diff between revs 39 and 40

Rev 39	Rev 40
Line 304...	Line 304...
`begin`	`begin`
`if (rstn_i = '0') then`	`if (rstn_i = '0') then`
`cp_ctrl.cmd_ff <= '0';`	`cp_ctrl.cmd_ff <= '0';`
`cp_ctrl.busy <= '0';`	`cp_ctrl.busy <= '0';`
`elsif rising_edge(clk_i) then`	`elsif rising_edge(clk_i) then`
`if (CPU_EXTENSION_RISCV_M = true) then`
`cp_ctrl.cmd_ff <= cp_ctrl.cmd;`	`cp_ctrl.cmd_ff <= cp_ctrl.cmd;`
`if ((cp0_valid_i or cp1_valid_i or cp2_valid_i or cp3_valid_i) = '1') then -- cp computation done?`	`if ((cp0_valid_i or cp1_valid_i or cp2_valid_i or cp3_valid_i) = '1') then -- cp computation done?`
`cp_ctrl.busy <= '0';`	`cp_ctrl.busy <= '0';`
`elsif (cp_ctrl.start = '1') then`	`elsif (cp_ctrl.start = '1') then`
`cp_ctrl.busy <= '1';`	`cp_ctrl.busy <= '1';`
`end if;`	`end if;`
`else -- no co-processor(s) implemented`
`cp_ctrl.cmd_ff <= '0';`
`cp_ctrl.busy <= '0';`
`end if;`
`end if;`	`end if;`
`end process cp_arbiter;`	`end process cp_arbiter;`

`-- is co-processor operation? --`	`-- is co-processor operation? --`
`cp_ctrl.cmd <= '1' when (ctrl_i(ctrl_alu_func1_c downto ctrl_alu_func0_c) = alu_func_cmd_copro_c) else '0';`	`cp_ctrl.cmd <= '1' when (ctrl_i(ctrl_alu_func1_c downto ctrl_alu_func0_c) = alu_func_cmd_copro_c) else '0';`