In other words , software interrupts always occur at the beginning of an instruction execution cycle 换句话说,软件中断常常在指令运行周期的开始发生。
The instruction execution may involve several operations and depends on the nature of the instruction 执行指令可能包括多个操作,这取决于指令的类型。
Because with ia - 64 , the whole premise is to basically simplify the chip as much as possible in terms of the issue logic and the instruction execution , and to put more emphasis on the compiler 因为,对于ia - 64 ,整个前提就是在发送逻辑和指令执行方面从根本上尽可能地简化芯片,而将更多的注意力放在编译器上。
Many embedded applications have little or no need for floating - point arithmetic , and software emulation of powerpc floating - point instruction execution is usually more than adequate when it is needed 很多嵌入式应用程序很少或者根本不需要浮点算法,而当需要的时候,对powerpc浮点指令执行进行软件仿真就足够了。
Although gpu has a very high computing speed , algorithms implemented in cpu cannot be put to execute in gpu directly because of the discrepancy in instruction execution manner of the two . gpu ' s architecture is a high parallel simd instruction set system . to reimplement algorithms insufficient to run on cpu with programmable graphics hardware , it has to reconsider the data structures and procedures to implement them to make full use of the 虽然gpu具有非常高的计算速度,但并不能将以前在cpu中实现的算法直接放到gpu中来执行,这是因为gpu的指令执行方式和cpu不一样, gpu的体系结构是一种高度并行的单指令多数据( simd )指令执行体系,所以要在可编程图形硬件上实现在cpu中效率不高的算法,就需要重新制定算法实现的数据结构和步骤,以充分利用gpu并行处理体系结构带来的性能优势。