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ad2f821ff5
Specifically we should write the sysval semantic as an instruction idx
for the following instructions:
VKD3D_SM4_OP_DCL_INPUT_SGV
VKD3D_SM4_OP_DCL_INPUT_PS_SGV
VKD3D_SM4_OP_DCL_INPUT_SIV
VKD3D_SM4_OP_DCL_INPUT_PS_SIV
VKD3D_SM4_OP_DCL_OUTPUT_SIV
and not the following ones:
VKD3D_SM4_OP_DCL_INPUT
VKD3D_SM4_OP_DCL_PS_INPUT
VKD3D_SM4_OP_DCL_OUTPUT
Which is consistent with what we do when reading these instructions in
the following functions:
shader_sm4_read_declaration_register_semantic()
shader_sm4_read_dcl_input_ps_siv()
and
shader_sm4_read_dcl_input_ps()
shader_sm4_read_declaration_dst()
for the non-SGV and non-SIV cases.
Note that the non-SGV and non-SIV instructions don't need/use this
extra information because they rely on the dst register type and index.
I suggest to introduce this change because the here replaced check is
brittle, and we might be omitting the sysval semantic in some cases.