Skip to content

Register cache tricks #187

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
davidgiven merged 1 commit into from
May 31, 2026
Merged

Register cache tricks #187

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions src/cowbe/archpdp11.cow.ng
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1033,6 +1033,7 @@ gen JUMP():j uses all
gen STARTSUB() uses all
{
RegCacheReset();
PreferredValuesReset();

EmitterOpenStream(current_subr);

Expand Down
8 changes: 6 additions & 2 deletions src/cowbe/codegen.coh
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -46,8 +46,12 @@ end record;

var imported_values: SimpleValue[REGISTER_COUNT];
MemZero(&imported_values as [uint8], @bytesof imported_values);

var preferred_values: SimpleValue[REGISTER_COUNT];
MemZero(&preferred_values as [uint8], @bytesof preferred_values);
sub PreferredValuesReset() is
MemZero(&preferred_values as [uint8], @bytesof preferred_values);
end sub;
PreferredValuesReset();

var emitting_asm: uint8 := 0;

Expand Down Expand Up @@ -86,7 +90,7 @@ end sub;
end sub;

sub FindConflictingRegisters(inreg: RegId): (conflicting: RegId) is
conflicting := 0;
conflicting := inreg;
var reg := &registers[0];
while reg != &registers[REGISTER_COUNT] loop
if (reg.id & inreg) != 0 then
Expand Down