mirror of https://github.com/YosysHQ/picorv32.git
After some profiling: one-hot FSM encoding
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picorv32.v
19
picorv32.v
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@ -487,15 +487,16 @@ module picorv32 #(
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// Main State Machine
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// Main State Machine
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localparam cpu_state_trap = 0;
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localparam cpu_state_trap = 8'b10000000;
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localparam cpu_state_fetch = 1;
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localparam cpu_state_fetch = 8'b01000000;
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localparam cpu_state_ld_rs1 = 2;
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localparam cpu_state_ld_rs1 = 8'b00100000;
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localparam cpu_state_ld_rs2 = 3;
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localparam cpu_state_ld_rs2 = 8'b00010000;
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localparam cpu_state_exec = 4;
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localparam cpu_state_exec = 8'b00001000;
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localparam cpu_state_shift = 5;
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localparam cpu_state_shift = 8'b00000100;
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localparam cpu_state_stmem = 6;
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localparam cpu_state_stmem = 8'b00000010;
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localparam cpu_state_ldmem = 7;
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localparam cpu_state_ldmem = 8'b00000001;
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reg [2:0] cpu_state;
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reg [7:0] cpu_state;
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reg [1:0] irq_state;
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reg [1:0] irq_state;
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reg set_mem_do_rinst;
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reg set_mem_do_rinst;
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