Re: [Qemu-devel] SSE 'maxps' instruction bug?

2007-03-13 Thread Tim Olson
: a = (a b) ? a : b; Which is exactly how it is coded in qemu (at least in v0.8.2). This relies upon the fact that the greater-than comparison returns false anytime there is an unordered operand (NaN), for either operand -- in which case the result is the second argument. -- Tim Olson

Re: [Qemu-devel] qemu-system-* using mmap?

2006-12-14 Thread Tim Olson
On Dec 13, 2006, at 10:04 AM, Joseph Miller wrote: Can someone elaborate on this a little? What is the difference between the SOFTMMU and the mmap()? Should I be using the --enable-system or the --disable-system for win32 guest on i386 debian host? Can someone give a little more insight

[Qemu-devel] qemu-system-* using mmap?

2006-12-13 Thread Tim Olson
there is a big performance hit using the software mmu, as each target load or store instruction is expanded into 20-30 host instructions to perform the translation. Is there a way to build the qemu-system-* emulators using the mmap() feature mentioned in the documentation? -- Tim Olson