* [Qemu-devel] Bug ARM NEON instrucion vcvt
@ 2010-01-21 13:44 André Bergner
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From: André Bergner @ 2010-01-21 13:44 UTC (permalink / raw)
To: qemu-devel
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Hi,
I don't know if this is already known. I found the ARM NEON vcvt instruction
mentioned in some fix in the mailing list archive, but not what has been
fixed.
However, I found a bug in the implementation of that instruction. I observe
that the type operands are emulated in the wrong order.
Example: "vcvt.s32.f32 q0,q0" should convert a float in q0 into an integer,
which works correctly on the CPU. With Qemu I have to change the order of
the
operands to get the correct result (i.e. "vcvt.f32.s32 q0,q0").
I did not test all combinations of conversions, just integer and float.
cheers,
André
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