Alan Modra wrote:
These are most likey 64-bit address constant loads. On ppc32, a 32-bit
address constant can be calculated in at most 2 instructions. A 64-bit
address takes up to 5 instructions to calculate in-line, or a TOC memory
load.
One general principle at work here is that there is no rul
On Fri, Mar 04, 2005 at 04:59:25PM -0600, Edmar Wienskoski wrote:
> and notice a considerable number of load instructions in the 64 bits one.
>
> Does anyone have an insight on why this is happening ?
These are most likey 64-bit address constant loads. On ppc32, a 32-bit
address constant can be
On Mar 4, 2005, at 6:57 PM, David Edelsohn wrote:
Edmar Wienskoski writes:
Edmar> I checked with several gcc versions. Some of the spec2k
Edmar> benchmarks has a considerable performance loss when
Edmar> the benchmark is compiled with a 64 bits tool.
Edmar> I looked into the assembler code generate
> Edmar Wienskoski writes:
Edmar> I checked with several gcc versions. Some of the spec2k
Edmar> benchmarks has a considerable performance loss when
Edmar> the benchmark is compiled with a 64 bits tool.
Edmar> I looked into the assembler code generated for try_route (route.c)
Edmar> (compiled
