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using lzc instead of priority_encoder

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Blaise Tine
2021-08-26 07:29:47 -07:00
parent 2a27bfbfd5
commit e494860f38
4 changed files with 30 additions and 36 deletions
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18
hw/rtl/VX_warp_sched.v
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@@ -30,7 +30,7 @@ module VX_warp_sched #(
reg [`NUM_WARPS-1:0] stalled_warps; // asserted when a branch/gpgpu instructions are issued
reg [`NUM_WARPS-1:0][`NUM_THREADS-1:0] thread_masks;
reg [`NUM_WARPS-1:0][31:0] warp_pcs, warp_next_pcs;
reg [`NUM_WARPS-1:0][31:0] warp_pcs;
// barriers
reg [`NUM_BARRIERS-1:0][`NUM_WARPS-1:0] barrier_masks; // warps waiting on barrier
@@ -121,12 +121,11 @@ module VX_warp_sched #(
end
if (ifetch_req_fire) begin
warp_next_pcs[ifetch_req_if.wid] <= ifetch_req_if.PC + 4;
warp_pcs[ifetch_req_if.wid] <= ifetch_req_if.PC + 4;
end
if (wstall_if.valid) begin
stalled_warps[wstall_if.wid] <= wstall_if.stalled;
warp_pcs[wstall_if.wid] <= warp_next_pcs[wstall_if.wid];
end
// join handling
@@ -200,13 +199,12 @@ module VX_warp_sched #(
wire [`NUM_WARPS-1:0] ready_warps = active_warps & ~(stalled_warps | barrier_stalls);
VX_priority_encoder #(
.N (`NUM_WARPS)
) pri_enc (
.data_in (ready_warps),
.index (schedule_wid),
.valid_out (schedule_valid),
`UNUSED_PIN (onehot)
VX_lzc #(
.WIDTH (`NUM_WARPS)
) wid_select (
.in_i (ready_warps),
.cnt_o (schedule_wid),
.valid_o (schedule_valid)
);
wire [`NUM_WARPS-1:0][(`NUM_THREADS + 32)-1:0] schedule_data;