This is interesting. I've quickly tried it out on the SH port. It can be
accomplished with the combine pass, although there are a few things that
should be taken care of:
- an extendsidi2 pattern is required (so that the extension is not
performed before expand)
...
One potential
Hi Jon,
I'd like to try to optimise double word left shifts of sign/zero
extended
operands if a widening multiply instruction is available. For the
following
code:
long long f(long a, long b)
{
return (long long)a b;
}
I'd like to optimise this to something like:
(long long) a * (1
Hi,
I'd like to try to optimise double word left shifts of sign/zero extended
operands if a widening multiply instruction is available. For the following
code:
long long f(long a, long b)
{
return (long long)a b;
}
ARM, MIPS etc expand to a fairly long sequence
On Thu, Jul 26, 2012 at 8:57 AM, Jon Beniston jon.benis...@ensilica.com wrote:
I'd like to try to optimise double word left shifts of sign/zero extended
operands if a widening multiply instruction is available. For the following
code:
long long f(long a, long b)
{
return (long long)a b;
On Thu, 2012-07-26 at 10:51 -0700, Ian Lance Taylor wrote:
On Thu, Jul 26, 2012 at 8:57 AM, Jon Beniston jon.benis...@ensilica.com
wrote:
I'd like to try to optimise double word left shifts of sign/zero extended
operands if a widening multiply instruction is available. For the following
