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minor updates

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This commit is contained in:
Blaise Tine
2021-01-12 03:10:39 -08:00
parent 7c4823e65c
commit fa5592be22
4 changed files with 31 additions and 50 deletions
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31
hw/rtl/VX_alu_unit.v
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@@ -86,40 +86,35 @@ module VX_alu_unit #(
wire [31:0] br_dest = add_result[alu_req_if.tid];
wire [32:0] cmp_result = sub_result[alu_req_if.tid];
wire [32:0] cmp_result_r;
wire is_br_op_r;
`IGNORE_WARNINGS_BEGIN
wire [`BR_BITS-1:0] br_op_r;
`IGNORE_WARNINGS_END
wire is_less = cmp_result[32];
wire is_equal = ~(| cmp_result[31:0]);
wire br_neg = `BR_NEG(br_op);
wire br_less = `BR_LESS(br_op);
wire br_static = `BR_STATIC(br_op);
wire br_taken = ((br_less ? is_less : is_equal) ^ br_neg) | br_static;
// output
wire is_br_op_r;
wire stall_out = ~alu_commit_if.ready && alu_commit_if.valid;
VX_pipe_register #(
.DATAW (1 + `NW_BITS + `NUM_THREADS + 32 + `NR_BITS + 1 + (`NUM_THREADS * 32) + 1 + `BR_BITS + 32 + 33),
.DATAW (1 + `NW_BITS + `NUM_THREADS + 32 + `NR_BITS + 1 + (`NUM_THREADS * 32) + 1 + 1 + 32),
.RESETW (1)
) pipe_reg (
.clk (clk),
.reset (reset),
.enable (!stall_out),
.data_in ({alu_req_if.valid, alu_req_if.wid, alu_req_if.tmask, alu_req_if.PC, alu_req_if.rd, alu_req_if.wb, alu_jal_result, is_br_op, br_op, br_dest, cmp_result}),
.data_out ({alu_commit_if.valid, alu_commit_if.wid, alu_commit_if.tmask, alu_commit_if.PC, alu_commit_if.rd, alu_commit_if.wb, alu_commit_if.data, is_br_op_r, br_op_r, branch_ctl_if.dest, cmp_result_r})
.data_in ({alu_req_if.valid, alu_req_if.wid, alu_req_if.tmask, alu_req_if.PC, alu_req_if.rd, alu_req_if.wb, alu_jal_result, is_br_op, br_taken, br_dest}),
.data_out ({alu_commit_if.valid, alu_commit_if.wid, alu_commit_if.tmask, alu_commit_if.PC, alu_commit_if.rd, alu_commit_if.wb, alu_commit_if.data, is_br_op_r, branch_ctl_if.taken, branch_ctl_if.dest})
);
assign alu_commit_if.eop = 1'b1;
wire is_less = cmp_result_r[32];
wire is_equal = ~(| cmp_result_r[31:0]);
wire br_neg = `BR_NEG(br_op_r);
wire br_less = `BR_LESS(br_op_r);
wire br_static = `BR_STATIC(br_op_r);
wire br_taken = ((br_less ? is_less : is_equal) ^ br_neg) | br_static;
assign branch_ctl_if.valid = alu_commit_if.valid && alu_commit_if.ready && is_br_op_r;
assign branch_ctl_if.wid = alu_commit_if.wid;
assign branch_ctl_if.taken = br_taken;
assign branch_ctl_if.wid = alu_commit_if.wid;
// can accept new request?
assign alu_req_if.ready = ~stall_out;