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pipeline refactoring

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This commit is contained in:
Blaise Tine
2020-07-20 09:38:54 -04:00
parent 577a5791dc
commit e2100e9e87
14 changed files with 182 additions and 268 deletions
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27
hw/rtl/VX_decode.v
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@@ -92,7 +92,7 @@ module VX_decode #(
// BRANCH
always @(*) begin
br_op = `BR_OTHER;
br_op = `BR_EQ;
case (opcode)
`INST_B: begin
case (func3)
@@ -192,20 +192,20 @@ module VX_decode #(
assign decode_tmp_if.curr_PC = ifetch_rsp_if.curr_PC;
assign decode_tmp_if.next_PC = ifetch_rsp_if.curr_PC + 32'h4;
assign decode_tmp_if.ex_type = is_br ? `EX_BR :
is_lsu ? `EX_LSU :
is_csr ? `EX_CSR :
is_mul ? `EX_MUL :
is_gpu ? `EX_GPU :
assign decode_tmp_if.ex_type = is_lsu ? `EX_LSU :
is_csr ? `EX_CSR :
is_mul ? `EX_MUL :
is_gpu ? `EX_GPU :
is_br ? `EX_ALU :
(is_rtype || is_itype || is_lui || is_auipc) ? `EX_ALU :
`EX_NOP;
assign decode_tmp_if.instr_op = is_br ? `OP_BITS'(br_op) :
is_lsu ? `OP_BITS'(lsu_op) :
is_csr ? `OP_BITS'(csr_op) :
is_mul ? `OP_BITS'(mul_op) :
is_gpu ? `OP_BITS'(gpu_op) :
(is_rtype || is_itype || is_lui || is_auipc) ? `OP_BITS'(alu_op) :
assign decode_tmp_if.instr_op = is_lsu ? `OP_BITS'(lsu_op) :
is_csr ? `OP_BITS'(csr_op) :
is_mul ? `OP_BITS'(mul_op) :
is_gpu ? `OP_BITS'(gpu_op) :
is_br ? `OP_BITS'({1'b1, br_op}) :
(is_rtype || is_itype || is_lui || is_auipc) ? `OP_BITS'(alu_op) :
0;
assign decode_tmp_if.rd = rd;
@@ -219,7 +219,7 @@ module VX_decode #(
is_csr ? 32'(u_12) :
src2_imm;
assign decode_tmp_if.rs1_is_PC = is_auipc;
assign decode_tmp_if.rs1_is_PC = is_auipc;
assign decode_tmp_if.rs2_is_imm = is_itype || is_lui || is_auipc || is_csr_imm;
@@ -269,7 +269,6 @@ module VX_decode #(
// trap unsupported instructions
assert(~(~stall && (decode_tmp_if.ex_type == `EX_ALU) && `ALU_OP(decode_tmp_if.instr_op) == `ALU_OTHER));
assert(~(~stall && (decode_tmp_if.ex_type == `EX_BR) && `BR_OP(decode_tmp_if.instr_op) == `BR_OTHER));
assert(~(~stall && (decode_tmp_if.ex_type == `EX_CSR) && `CSR_OP(decode_tmp_if.instr_op) == `CSR_OTHER));
assert(~(~stall && (decode_tmp_if.ex_type == `EX_GPU) && `GPU_OP(decode_tmp_if.instr_op) == `GPU_OTHER));
end