Using as: i386-TBM

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#### 9.15.14 AMD’s Trailing Bit Manipulation Instructions

`as` supports AMD’s Trailing Bit Manipulation (TBM) instruction set, available on AMD’s BDVER2 processors (Trinity and Viperfish).

TBM instructions provide instructions implementing individual bit manipulation operations such as isolating, masking, setting, resetting, complementing, and operations on trailing zeros and ones.