IAR Embedded Workbench for RISC-V 3.40IAR C/C++ DevelopmentThe preprocessorDescription of predefined preprocessor symbols__riscv_zbb__riscv_zbbIn this section: DescriptionAn integer that is set to the version number of the B extension when the code is compiled for a RISC-V core with the standard extension Zbb (“best of” bit manipulation instructions).