Optimized to minimize load latency and icache usage. Together with the
previous fpc_ansistr_decr_ref optimization this little test programm
runs about 40% faster.
program stringspeed;
procedure test(s:string);
begin
end;
var
s:string;
i: cardinal;
begin
s:='abcd';
for i:=0 to $FFFFFF do
test(s);
end.
Even with s:='' it's about 30% faster.
git-svn-id: trunk@22035 -
As fpc_ansistr_decr_ref is a very often called procedure in typical
pascal programs this optimized version will shave off some cycles
compared to the generic one.
It tries to avoid load latencies as much as possible and also uses the
new Z-flag functionality of the InterlockedDecrement from the previous
patch. Also FreeMem is called as a tail-function.
git-svn-id: trunk@22034 -
Use movs instead of mov when setting the result in r0. This way the Z
flag will be set for the calling function which might allow some smaller
optimizations later on. It does not affect current code in any way,
because flags are not expected to be used across function calls.
git-svn-id: trunk@22033 -
Especially with 64bit operators the CG sometimes generates:
and r0, r1, #0
Which just clears r0 and is equivalent with
mov r0, #0
git-svn-id: trunk@22032 -
In certain cases the CG would emit something like
bic r1, r0, #0
As BIC is clearing the specified bits this is equivalent to
mov r1, r0
This patch changes the CG to emit the mov instead which the register
allocator will hopefully remove most of the time.
git-svn-id: trunk@22024 -
default value (mantis #22343)
* give an error when specifying an invalid default value (e.g. a
floating point number for a longint parameter)
git-svn-id: trunk@22021 -
since they require function calls and it's not possible to call functions
inside constant blocks (and because current_procinfo is not necessarily
valid when a constant block is parsed, this moreover crashes the compiler)
git-svn-id: trunk@22018 -
Currently the register spiller can not handle the "bond" between IT* and
a following instruction, sometimes breaking them apart, which breaks the
build or worse the result.
So for now we're not emitting A_IT* in second_cmp64bit anymore but use a
conditional jump instead.
This fixes Mantis #22520
git-svn-id: trunk@22009 -
We're currently using rev for armv6+, but FPC 2.6 could not handle the
instruction. So if somebody wants to build trunk it can't be for armv6+.
We'll circumvent the problem by always using the the generic code when
build with FPC 2.6.
git-svn-id: trunk@22003 -
