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Diffstat (limited to 'llvm/docs/AMDGPU/gfx12_sendmsg.rst')
| -rw-r--r-- | llvm/docs/AMDGPU/gfx12_sendmsg.rst | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/llvm/docs/AMDGPU/gfx12_sendmsg.rst b/llvm/docs/AMDGPU/gfx12_sendmsg.rst new file mode 100644 index 0000000..cb51be0 --- /dev/null +++ b/llvm/docs/AMDGPU/gfx12_sendmsg.rst @@ -0,0 +1,48 @@ +.. _amdgpu_synid_sendmsg: + +sendmsg +======= + +An 8-bit value in simm16[7:0] encodes the message type. + +This operand may be specified as one of the following: + +* An :ref:`integer_number<amdgpu_synid_integer_number>` or an :ref:`absolute_expression<amdgpu_synid_absolute_expression>`. The value must be in the range 0..0xFFFF. +* A *sendmsg* value described below. + + + ==================================== ==================================================== + Sendmsg Value Syntax Description + ==================================== ==================================================== + sendmsg(<*type*>) A message identified by its *type*. + ==================================== ==================================================== + +*Type* may be specified using message *name* or message *id*. + +Numeric values may be specified as positive :ref:`integer numbers<amdgpu_synid_integer_number>` +or :ref:`absolute expressions<amdgpu_synid_absolute_expression>`. + + +Only the following message types are valid. + + ====================== =========== + Message type simm16[7:0] + ====================== =========== + Reserved 0 + MSG_INTERRUPT 1 + MSG_HS_TESSFACTOR 2 + MSG_DEALLOC_VGPRS 3 + MSG_GS_ALLOC_REQ 9 + ====================== =========== + +Examples: + +.. parsed-literal:: + + // numeric message code + msg = 0x1 + s_sendmsg 0x3 + s_sendmsg msg + 2 + + // sendmsg with strict arguments validation + s_sendmsg sendmsg(MSG_INTERRUPT) |