llvm-project/llvm/docs/AMDGPU/gfx8_msg.rst

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..
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.. _amdgpu_synid8_msg:
msg
===========================
A 16-bit message code. The bits of this operand have the following meaning:
============ ======================================================
Bits Description
============ ======================================================
3:0 Message *type*.
6:4 Optional *operation*.
9:7 Optional *parameters*.
15:10 Unused.
============ ======================================================
This operand may be specified as a positive 16-bit :ref:`integer_number<amdgpu_synid_integer_number>` or using the syntax described below:
======================================== ========================================================================
Syntax Description
======================================== ========================================================================
sendmsg(<*type*>) A message identified by its *type*.
sendmsg(<*type*>, <*op*>) A message identified by its *type* and *operation*.
sendmsg(<*type*>, <*op*>, <*stream*>) A message identified by its *type* and *operation* with a stream *id*.
======================================== ========================================================================
*Type* may be specified using message *name* or message *id*.
*Op* may be specified using operation *name* or operation *id*.
Stream *id* is an integer in the range 0..3.
Message *id*, operation *id* and stream *id* must be specified as positive :ref:`integer numbers<amdgpu_synid_integer_number>`.
Each message type supports specific operations:
================= ========== ============================== ============ ==========
Message name Message Id Supported Operations Operation Id Stream Id
================= ========== ============================== ============ ==========
MSG_INTERRUPT 1 \- \- \-
MSG_GS 2 GS_OP_CUT 1 Optional
\ GS_OP_EMIT 2 Optional
\ GS_OP_EMIT_CUT 3 Optional
MSG_GS_DONE 3 GS_OP_NOP 0 \-
\ GS_OP_CUT 1 Optional
\ GS_OP_EMIT 2 Optional
\ GS_OP_EMIT_CUT 3 Optional
MSG_SYSMSG 15 SYSMSG_OP_ECC_ERR_INTERRUPT 1 \-
\ SYSMSG_OP_REG_RD 2 \-
\ SYSMSG_OP_HOST_TRAP_ACK 3 \-
\ SYSMSG_OP_TTRACE_PC 4 \-
================= ========== ============================== ============ ==========
Examples:
.. parsed-literal::
s_sendmsg 0x12
s_sendmsg sendmsg(MSG_INTERRUPT)
s_sendmsg sendmsg(2, GS_OP_CUT)
s_sendmsg sendmsg(MSG_GS, GS_OP_EMIT)
s_sendmsg sendmsg(MSG_GS, 2)
s_sendmsg sendmsg(MSG_GS_DONE, GS_OP_EMIT_CUT, 1)
s_sendmsg sendmsg(MSG_SYSMSG, SYSMSG_OP_TTRACE_PC)