Xilinx MicroBlaze Reference Manual page 220

Notes
By default, Type B Instructions will take the 16-bit IMM field value and sign extend it to 32 bits to use
as the immediate operand. This behavior can be overridden by preceding the Type B instruction with
an imm instruction. See the instruction
As a special case, the imm instruction does not override a Software Break "brki rD, 0x18" when
C_DEBUG_ENABLED. is greater than zero, irrespective of the value of C_BASE_VECTORS, to allow
Software Break after an imm instruction.
MicroBlaze Processor Reference Guide
UG984 (v2018.2) June 21, 2018
Chapter 5: MicroBlaze Instruction Set Architecture
"imm" for details on using 32-bit immediate values.
www.xilinx.com
221
Send Feedback