Re: [Qemu-devel] x86 MMX register access problem seen on Sparc host

[malc]

On Sun, 21 Sep 2008, Blue Swirl wrote:

> Hi,
>
> I get these warnings when compiling i386 targets on Sparc host using a
> gcc 4.3 series compiler:
> /src/qemu/target-i386/ops_sse.h: In function 'helper_pmovmskb_mmx':
> /src/qemu/target-i386/ops_sse.h:982: warning: array subscript is above
> array bounds
> etc.
>
> The first line is the following:
>    val |= (s->XMM_B(0) >> 7);

All the lines before #if SHIFT == 1 should be MMX_B really.

> In cpu.h, the macro is defined on big endian host as
> #define XMM_B(n) _b[15 - (n)]
>
> But the type of Reg argument is MMXReg for pmovmskb_mmx and then the
> _b array has only 8 items.

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