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|  | .. _amdgpu_synid9_imm4: | 
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|  | imm4 | 
|  | =========================== | 
|  |  | 
|  | A positive :ref:`integer_number<amdgpu_synid_integer_number>`. The value is truncated to 4 bits. | 
|  |  | 
|  | This operand is a mask which controls indexing mode for operands of subsequent instructions. Value 1 enables indexing and value 0 disables it. | 
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|  | ============ ======================================== | 
|  | Bit          Meaning | 
|  | ============ ======================================== | 
|  | 0            Enables or disables *src0* indexing. | 
|  | 1            Enables or disables *src1* indexing. | 
|  | 2            Enables or disables *src2* indexing. | 
|  | 3            Enables or disables *dst* indexing. | 
|  | ============ ======================================== | 
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