Re: Floating-point in kernel space

2007-03-10 Thread Maslan
It would be helpful to know why you need this support as well I just wanted to know the idea behind not having FP in kernel-space. Thanks, Maslan ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers

Re: Floating-point in kernel space

2007-03-10 Thread Kip Macy
On 3/10/07, Maslan [EMAIL PROTECTED] wrote: It would be helpful to know why you need this support as well I just wanted to know the idea behind not having FP in kernel-space. Saving and restoring FPU registers adds overhead to thread context switching and there has never been a legitimate

Re: Floating-point in kernel space

2007-03-10 Thread Alexander Leidinger
Quoting Michael M. Press [EMAIL PROTECTED] (Fri, 9 Mar 2007 18:10:25 -0500): I think i've seen somewhere but i don't remember that floating point arithmetic is not allowed in kernel space, if that's right, can anyone please tell why ??? and why not not emulate the floating point in kernel

Floating-point in kernel space

2007-03-09 Thread Maslan
Hello, I think i've seen somewhere but i don't remember that floating point arithmetic is not allowed in kernel space, if that's right, can anyone please tell why ??? and why not not emulate the floating point in kernel space ??? Thanks -- I'm Searching For Perfection, So Even If U Need

Re: Floating-point in kernel space

2007-03-09 Thread Oliver Fromme
the kernel. So far there has been no compelling reason for having FP support in kernel code that would justify to pay that price. and why not not emulate the floating point in kernel space ??? First, FPU emulation is rather slow, and second, someone would have to write the code. In the past

Re: Floating-point in kernel space

2007-03-09 Thread Coleman Kane
of the FPU registers on every context switch within the kernel. So far there has been no compelling reason for having FP support in kernel code that would justify to pay that price. and why not not emulate the floating point in kernel space ??? First, FPU emulation is rather slow, and second

Re: Floating-point in kernel space

2007-03-09 Thread Michael M. Press
I think i've seen somewhere but i don't remember that floating point arithmetic is not allowed in kernel space, if that's right, can anyone please tell why ??? and why not not emulate the floating point in kernel space ??? That's nonsense! Floating point arithmetic is absolutely allowed