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RCL Rotate Bits Left with CF REPNZ Repeat String Operation Prefix
RCR Rotate Bits Right with CF REPZ Repeat String Operation Prefix
RDMSR Read from Model Specific Register RET Return from Procedure
RDTSC Read Time-Stamp Counter ROL Rotate Bits Left
REP Repeat String Operation Prefix ROR Rotate Bits Right
REPE Repeat String Operation Prefix RSM Resume from System Management Mode
REPNE Repeat String Operation Prefix