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minor update

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This commit is contained in:
Blaise Tine 2023-06-20 15:14:02 -04:00
parent b8ddc91b2c
commit 95bedf9a18
2 changed files with 12 additions and 9 deletions
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2
hw/rtl/VX_define.vh
View file

@ -150,11 +150,11 @@
`define INST_M_REM 3'b110
`define INST_M_REMU 3'b111
`define INST_M_BITS 3
`define INST_M_SIGNED(op) (~op[0])
`define INST_M_IS_MULX(op) (~op[2])
`define INST_M_IS_MULH(op) (op[1:0] != 0)
`define INST_M_SIGNED_A(op) (op[1:0] != 1)
`define INST_M_IS_REM(op) op[1]
`define INST_M_SIGNED(op) (~op[0])
`define INST_FMT_B 3'b000
`define INST_FMT_H 3'b001

19
hw/rtl/core/VX_alu_unit.sv
View file

@ -107,15 +107,18 @@ module VX_alu_unit #(
end
// branch
wire is_jal = is_br_op && (br_op == `INST_BR_JAL || br_op == `INST_BR_JALR);
wire [`NUM_THREADS-1:0][`XLEN-1:0] alu_jal_result = is_jal ? {`NUM_THREADS{`XLEN'(alu_req_if.next_PC)}} : alu_result;
wire [`XLEN-1:0] br_dest = add_result[alu_req_if.tid][`XLEN-1:0];
wire [`XLEN:0] cmp_result = sub_result[alu_req_if.tid][`XLEN:0];
wire is_less = cmp_result[`XLEN];
wire is_equal = ~(| cmp_result[`XLEN-1:0]);
wire is_equal = ~(| cmp_result[`XLEN-1:0]);
wire is_br_static = `INST_BR_STATIC(br_op);
wire [`NUM_THREADS-1:0][`XLEN-1:0] alu_jal_result;
for (genvar i = 0; i < `NUM_THREADS; ++i) begin
assign alu_jal_result[i] = (is_br_op && is_br_static) ? alu_req_if.next_PC : alu_result[i];
end
// output
@ -151,12 +154,12 @@ module VX_alu_unit #(
);
`UNUSED_VAR (br_op_r)
wire br_neg = `INST_BR_NEG(br_op_r);
wire br_less = `INST_BR_LESS(br_op_r);
wire br_static = `INST_BR_STATIC(br_op_r);
wire is_br_neg_r = `INST_BR_NEG(br_op_r);
wire is_br_less_r = `INST_BR_LESS(br_op_r);
wire is_br_static_r = `INST_BR_STATIC(br_op_r);
assign branch_ctl_if.valid = alu_valid_out && alu_ready_out && is_br_op_r;
assign branch_ctl_if.taken = ((br_less ? is_less_r : is_equal_r) ^ br_neg) | br_static;
assign branch_ctl_if.taken = ((is_br_less_r ? is_less_r : is_equal_r) ^ is_br_neg_r) | is_br_static_r;
assign branch_ctl_if.wid = alu_wid;
assign branch_ctl_if.dest = br_dest_r[`XLEN-1:0];