Download Altera Nios II Specifications
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rdctl rdctl read from control register Operation: rC ← ctlN Assembler Syntax: rdctl rC, ctlN Example: rdctl r3, ctl31 Description: Reads the value contained in control register ctlN and writes it to register rC. Instruction Type: R Instruction Fields: C = Register index of operand rC N = Control register index of operand ctlN 31 30 29 0 28 27 26 25 24 23 22 21 20 0 8–82 Nios II Processor Reference Handbook 19 C 18 17 16 15 14 13 0x26 12 11 10 9 8 N 7 6 5 4 3 2 1 0 0x3a Altera Corporation October 2007