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After some profiling: one-hot FSM encoding

This commit is contained in:
Clifford Wolf 2015-07-01 21:20:31 +02:00
parent c22ea8fe0a
commit f6fe27ecbf
1 changed files with 10 additions and 9 deletions
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19
picorv32.v
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@ -487,15 +487,16 @@ module picorv32 #(
// Main State Machine // Main State Machine
localparam cpu_state_trap = 0; localparam cpu_state_trap = 8'b10000000;
localparam cpu_state_fetch = 1; localparam cpu_state_fetch = 8'b01000000;
localparam cpu_state_ld_rs1 = 2; localparam cpu_state_ld_rs1 = 8'b00100000;
localparam cpu_state_ld_rs2 = 3; localparam cpu_state_ld_rs2 = 8'b00010000;
localparam cpu_state_exec = 4; localparam cpu_state_exec = 8'b00001000;
localparam cpu_state_shift = 5; localparam cpu_state_shift = 8'b00000100;
localparam cpu_state_stmem = 6; localparam cpu_state_stmem = 8'b00000010;
localparam cpu_state_ldmem = 7; localparam cpu_state_ldmem = 8'b00000001;
reg [2:0] cpu_state;
reg [7:0] cpu_state;
reg [1:0] irq_state; reg [1:0] irq_state;
reg set_mem_do_rinst; reg set_mem_do_rinst;