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8.15.2.3 IA-64 Processor-Status-Register (PSR) Bit Names

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.