Hi Mikey,
On Mon, 13 May 2013 17:09:59 +1000 Michael Neuling <mi...@neuling.org> wrote:
>
> This doesn't work for me but the below does:
>
> _GLOBAL(__bswapdi2)
> rotlwi r9,r4,8
> rotlwi r10,r3,8
> rlwimi r9,r4,24,0,7
> rlwimi r10,r3,24,0,7
> rlwimi r9,r4,24,16,23
> rlwimi r10,r3,24,16,23
> mr r4,r10
> mr r3,r9
> blr
>
> stolen from GCC -02 output of:
> unsigned long long __bswapdi2(unsigned long long x)
> {
> return ((x & 0x00000000000000ffULL) << 56) |
> ((x & 0x000000000000ff00ULL) << 40) |
> ((x & 0x0000000000ff0000ULL) << 24) |
> ((x & 0x00000000ff000000ULL) << 8) |
> ((x & 0x000000ff00000000ULL) >> 8) |
> ((x & 0x0000ff0000000000ULL) >> 24) |
> ((x & 0x00ff000000000000ULL) >> 40) |
> ((x & 0xff00000000000000ULL) >> 56);
> }So, if we are just stealing the output of gcc, why not just use the C version (at least for 32 bit)? -- Cheers, Stephen Rothwell s...@canb.auug.org.au
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