On Fri, 2014-07-04 at 18:17 +0200, Ard Biesheuvel wrote:
> On 4 July 2014 18:13, Edward Nevill wrote:
> If you are saying AArch64, I am assuming you can use inline asm and umulh, no?
>
Thank you, thank you, thank you,
You just saved me some very messy coding,
Ed.
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On 4 July 2014 18:13, Edward Nevill wrote:
> Hi,
>
> Does anyone know of a nice way to detect 64 x 64 -> 64 multiply overflow on
> aarch64?
>
> On x86 you can just use the V flag, but aarch64 seems to have no option to
> set the flags after a MUL instruction which I find very odd.
>
> The only s
Hi,
Does anyone know of a nice way to detect 64 x 64 -> 64 multiply overflow on
aarch64?
On x86 you can just use the V flag, but aarch64 seems to have no option to set
the flags after a MUL instruction which I find very odd.
The only solution I can think of is to do the equivalent of
r = a
