as: IA-64-Bits

 
 9.16.2.3 IA-64 Processor-Status-Register (PSR) Bit Names
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 The assembler defines bit masks for each of the bits in the IA-64
 processor status register.  For example, 'psr.ic' corresponds to a value
 of 0x2000.  These masks are primarily intended for use with the
 'ssm'/'sum' and 'rsm'/'rum' instructions, but they can be used anywhere
 else where an integer constant is expected.