floating-point exception mode register

I need to get (and set) the floating-point exception mode.
I’ve seen that in exec/interrupts.h there are:



That should be get and set via ReadTaskContext/WriteTaskContext. Now my question is. Is the only way to get that register? Is it the correct way? Is there a #define to get only the bit I need?

Thanks

@afxgroup
You could use assembler, or asm inline(), code using the mffs/mtfsf instructions instead if you only need it for the current task, but using OS functions like (Read|Write)TaskContext() instead is better.

Thanks joerg

@afxgroup

To enable/disable jave/ieee mode for altivec I used following code, for fpu exception you could write something similiar.


#ifdef __ALTIVEC__
#include <altivec.h>
#endif

#ifdef __ALTIVEC__
/*java/ieee mode off*/
const vector unsigned int VOne = vec_splat_u32 (1);
vec_mtvscr (VOne); */
#endif /* __ALTIVEC__ */

Edit:
Your can give a look here, Apple is stil one of best sources in the web to get PowerPC infos

https://dev.os9.ca/techpubs/mac/PPCNumerics/PPCNumerics-154.html