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fpga fixes: warp scheduler, fnmadd, fdiv, fsqrt

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This commit is contained in:
Blaise Tine
2020-09-08 07:05:26 -07:00
parent 4c08929c56
commit 36ec603d17
22 changed files with 2374 additions and 2588 deletions
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28
hw/rtl/VX_warp_sched.v
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@@ -20,9 +20,9 @@ module VX_warp_sched #(
wire [31:0] join_pc;
wire [`NUM_THREADS-1:0] join_tm;
reg [`NUM_WARPS-1:0] active_warps; // real active warps (updated when a warp is activated or disabled)
reg [`NUM_WARPS-1:0] stalled_warps; // asserted when a branch/gpgpu instructions are issued
reg [`NUM_WARPS-1:0] active_warps, active_warps_n; // real active warps (updated when a warp is activated or disabled)
reg [`NUM_WARPS-1:0] schedule_table, schedule_table_n; // enforces round-robin, barrier, and non-speculating branches
reg [`NUM_WARPS-1:0] stalled_warps; // asserted when a branch/gpgpu instructions are issued
// Lock warp until instruction decode to resolve branches
reg [`NUM_WARPS-1:0] fetch_lock;
@@ -46,12 +46,20 @@ module VX_warp_sched #(
wire ifetch_rsp_fire = ifetch_rsp_if.valid && ifetch_rsp_if.ready;
always @(*) begin
active_warps_n = active_warps;
if (warp_ctl_if.valid && warp_ctl_if.wspawn.valid) begin
active_warps_n = warp_ctl_if.wspawn.wmask;
end
if (warp_ctl_if.valid && warp_ctl_if.tmc.valid) begin
active_warps_n[warp_ctl_if.wid] = (warp_ctl_if.tmc.tmask != 0);
end
end
always @(*) begin
schedule_table_n = schedule_table;
if (warp_ctl_if.valid
&& warp_ctl_if.tmc.valid
&& (0 == warp_ctl_if.tmc.tmask)) begin
schedule_table_n[warp_ctl_if.wid] = 0;
if (warp_ctl_if.valid && warp_ctl_if.tmc.valid) begin
schedule_table_n[warp_ctl_if.wid] = (warp_ctl_if.tmc.tmask != 0);
end
if (scheduled_warp) begin // remove scheduled warp (round-robin)
schedule_table_n[warp_to_schedule] = 0;
@@ -82,7 +90,6 @@ module VX_warp_sched #(
end
end else begin
if (warp_ctl_if.valid && warp_ctl_if.wspawn.valid) begin
active_warps <= warp_ctl_if.wspawn.wmask;
use_wspawn <= warp_ctl_if.wspawn.wmask & (~`NUM_WARPS'(1));
use_wspawn_pc <= warp_ctl_if.wspawn.pc;
end
@@ -97,9 +104,6 @@ module VX_warp_sched #(
end else if (warp_ctl_if.valid && warp_ctl_if.tmc.valid) begin
thread_masks[warp_ctl_if.wid] <= warp_ctl_if.tmc.tmask;
stalled_warps[warp_ctl_if.wid] <= 0;
if (0 == warp_ctl_if.tmc.tmask) begin
active_warps[warp_ctl_if.wid] <= 0;
end
end else if (join_if.valid && !didnt_split) begin
if (!join_fall) begin
warp_pcs[join_if.wid] <= join_pc;
@@ -143,8 +147,10 @@ module VX_warp_sched #(
warp_pcs[ifetch_rsp_if.wid] <= ifetch_rsp_if.PC + 4;
end
active_warps <= active_warps_n;
// reset 'schedule_table' when it goes to zero
schedule_table <= (| schedule_table_n) ? schedule_table_n : active_warps;
schedule_table <= (| schedule_table_n) ? schedule_table_n : active_warps_n;
end
end