[Qemu-devel] Can anybody help me figure out what has been done about floating point multiply in QEMU?

[Qemu-devel] Can anybody help me figure out what has been done about floating point multiply in QEMU?

[Guan, Qiang]

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Hi, Everybody



I am a freshman in QEMU.

I want to figure out what is happening in emulating the floating point calculation in QEMU. I checked the codes in target-i386/translate.c, but I cannot find anything about floating point calculation, I can only find the emulation about integer "mul" or "div". My question is what did QEMU do when they need to emulate a floating point calculation? where are these codes?



Best wishes



Qiang

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Re: [Qemu-devel] Can anybody help me figure out what has been done about floating point multiply in QEMU?

[Nathan Froyd]

On 05/23/2011 01:36 PM, Guan, Qiang wrote:
> I want to figure out what is happening in emulating the floating point
> calculation in QEMU. I checked the codes in target-i386/translate.c, but I
> cannot find anything about floating point calculation, I can only find the
> emulation about integer "mul" or "div". My question is what did QEMU do when
> they need to emulate a floating point calculation? where are these codes?

All the code for manipulating floating-point numbers is in the fpu directory.

The target-i386 code that calls into those functions is in op_helper.c.

HTH,
-Nathan