IAR Embedded Workbench for RISC-V 3.40IAR C/C++ DevelopmentThe preprocessorDescription of predefined preprocessor symbols__riscv_b__riscv_bIn this section: DescriptionThis is an architecture extension test macro. It is defined when the code is compiled for a RISC-V core with the B extension. The value of the symbol is an integer that identifies the version of the extension.See also__riscv_arch_test.