switch_fpu_prepare

函数名称：FPU state switching for scheduling.* This is a two-stage process:* - switch_fpu_prepare() saves the old state.* This is done within the context of the old process.* - switch_fpu_finish() sets TIF_NEED_FPU_LOAD; the floating point state

函数原型：static inline void switch_fpu_prepare(struct fpu *old_fpu, int cpu)

返回类型：void

参数：

类型	参数	名称
struct fpu *	old_fpu
int	cpu

574

如果static_cpu_has(Onboard FPU )且非flags按位与I am a kernel thread 的值则

575

如果非These must be called with preempt disabled则@last_cpu:* Records the last CPU on which this context was loaded into* FPU registers等于负1

577

否则@last_cpu:* Records the last CPU on which this context was loaded into* FPU registers等于cpu

581

trace_x86_fpu_regs_deactivated(old_fpu)

**调用者**
名称	描述
__switch_to	switch_to(x,y) should switch tasks from x to y

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告