|
发表于 2010-6-16 00:04:37
|
显示全部楼层
For example, OpenCores' Plasma CPU is a MIPS clone, but it doesn't implement MIPS's unaligned load/store instructions due to patent issue. Therefore, if this kind unsupported instructions are executed, an exception is raised, and then the CPU jumps to the exception handler to "emulate" the instructions (MIPS ISA defines an exception to handle unknown instructions).
However, if you want to avoid such exceptions, maybe you should modify the GCC toolchain. |
|