IainCRobertson
commented
4 months ago I agree - this looks like a bug in the reference encoder.
Iain
From: yandumchin @.> Sent: 16 June 2024 09:02 To: riscv-non-isa/riscv-trace-spec @.> Cc: Subscribed @.***> Subject: [riscv-non-isa/riscv-trace-spec] Encoder reference python script generatedm 3 TRAPs on 2 exception events (Issue #119)
Hi, I ran refernce encoder python script with the following inputs: 0,0,0,0,0x80000104,4,0,0,0,0,0 0,0,0,0,0x80000108,4,0,0,0,0,0 10,0,0,0,0x8000010C,4,0,0,0,0,0 - updiscon 1,6,0xEE,0,0x8000222,0,0,0,0,0,0 - exception 2,0,0,0,0x800001b0,0,0,0,0,0,0 - interrupt 0,0,0,0,0x800001e0,4,0,0,0,0,0 0,0,0,0,0x800001e4,4,0,0,0,0,0 0,0,0,0,0x800001e8,4,0,0,0,0,0
and got the following outputs: format=SYNC, subformat=SUPPORT, ienable=1, encoder_mode=0, ioptions=23, qual_status=0, denable=0, dloss=0, doptions=0 Payload[1f 17] next=80000154 next=80000104 curr=80000154 format=SYNC, subformat=START, address=80000154, branch=1, context=0, privilege=0, time=0, Reason[first_qualified] Payload[13 00 00 00 00 00 00 00 00 aa 00 00 40] next=80000108 curr=80000104 prev=80000154 format=ADDR, address=80000104, irreport=0, irdepth=511, notify=0, updiscon=0, Reason[prev_updiscon] Payload[12 04 00 00 02 00 00 00 e0] next=8000010c curr=80000108 prev=80000104 next=8000222 curr=8000010c prev=80000108 format=ADDR, address=8000010c, irreport=0, irdepth=511, notify=0, updiscon=0, Reason[next_exc_only] Payload[32 04 00 00 02 00 00 00 e0] next=800001b0 curr=8000222 prev=8000010c format=SYNC, subformat=TRAP, address=8000222, branch=1, context=0, ecause=6, interrupt=0, privilege=0, time=0, thaddr=0, tval=ee, Reason[prev_updiscon, curr_exc_only] Payload[17 00 00 00 00 00 00 00 00 83 88 00 00 02 00 00 00 80 3b] next=800001e0 curr=800001b0 prev=8000222 format=SYNC, subformat=TRAP, address=800001b0, branch=1, context=0, ecause=6, interrupt=0, privilege=0, time=0, thaddr=0, tval=ee, Reason[prev_exception, curr_exc_only] Payload[17 00 00 00 00 00 00 00 00 03 6c 00 00 20 00 00 00 80 3b] next=800001e4 curr=800001e0 prev=800001b0 format=SYNC, subformat=TRAP, address=800001e0, branch=1, context=0, ecause=0, interrupt=1, privilege=0, time=0, thaddr=1, Reason[prev_exception] Payload[17 00 00 00 00 00 00 00 00 30 78 00 00 20] next=800001e8 curr=800001e4 prev=800001e0 format=ADDR, address=800001e8, irreport=0, irdepth=511, notify=0, updiscon=0 Payload[a2 07 00 00 02 00 00 00 e0] format=SYNC, subformat=SUPPORT, ienable=0, encoder_mode=0, ioptions=23, qual_status=1, denable=0, dloss=0, doptions=0 Payload[4f 17]
as you can see 3 TRAP packets are generated as response to uninferred jump and 2 exception events. I expected 2 TRAPs and SYNC_START instead.
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yandumchin
Hi, I ran refernce encoder python script with the following inputs: 0,0,0,0,0x80000104,4,0,0,0,0,0 0,0,0,0,0x80000108,4,0,0,0,0,0 10,0,0,0,0x8000010C,4,0,0,0,0,0 - updiscon 1,6,0xEE,0,0x8000222,0,0,0,0,0,0 - exception 2,0,0,0,0x800001b0,0,0,0,0,0,0 - interrupt 0,0,0,0,0x800001e0,4,0,0,0,0,0 0,0,0,0,0x800001e4,4,0,0,0,0,0 0,0,0,0,0x800001e8,4,0,0,0,0,0
and got the following outputs: format=SYNC, subformat=SUPPORT, ienable=1, encoder_mode=0, ioptions=23, qual_status=0, denable=0, dloss=0, doptions=0 Payload[1f 17]
next=80000154 next=80000104 curr=80000154 format=SYNC, subformat=START, address=80000154, branch=1, context=0, privilege=0, time=0, Reason[first_qualified] Payload[13 00 00 00 00 00 00 00 00 aa 00 00 40] next=80000108 curr=80000104 prev=80000154 format=ADDR, address=80000104, irreport=0, irdepth=511, notify=0, updiscon=0, Reason[prev_updiscon] Payload[12 04 00 00 02 00 00 00 e0] next=8000010c curr=80000108 prev=80000104 next=8000222 curr=8000010c prev=80000108 format=ADDR, address=8000010c, irreport=0, irdepth=511, notify=0, updiscon=0, Reason[next_exc_only] Payload[32 04 00 00 02 00 00 00 e0] next=800001b0 curr=8000222 prev=8000010c format=SYNC, subformat=TRAP, address=8000222, branch=1, context=0, ecause=6, interrupt=0, privilege=0, time=0, thaddr=0, tval=ee, Reason[prev_updiscon, curr_exc_only] Payload[17 00 00 00 00 00 00 00 00 83 88 00 00 02 00 00 00 80 3b] next=800001e0 curr=800001b0 prev=8000222 format=SYNC, subformat=TRAP, address=800001b0, branch=1, context=0, ecause=6, interrupt=0, privilege=0, time=0, thaddr=0, tval=ee, Reason[prev_exception, curr_exc_only] Payload[17 00 00 00 00 00 00 00 00 03 6c 00 00 20 00 00 00 80 3b] next=800001e4 curr=800001e0 prev=800001b0 format=SYNC, subformat=TRAP, address=800001e0, branch=1, context=0, ecause=0, interrupt=1, privilege=0, time=0, thaddr=1, Reason[prev_exception] Payload[17 00 00 00 00 00 00 00 00 30 78 00 00 20] next=800001e8 curr=800001e4 prev=800001e0 format=ADDR, address=800001e8, irreport=0, irdepth=511, notify=0, updiscon=0 Payload[a2 07 00 00 02 00 00 00 e0] format=SYNC, subformat=SUPPORT, ienable=0, encoder_mode=0, ioptions=23, qual_status=1, denable=0, dloss=0, doptions=0 Payload[4f 17]
as you can see 3 TRAP packets are generated as response to uninferred jump and 2 exception events. I expected 2 TRAPs and SYNC_START instead.