| Age | Commit message (Collapse) | Author |
|---|
|
The arm64 ABI needs to know precisely what
floating point types are being used, so we
need to store that information.
I also made typ[] a dynamic array.
|
|
This big diff does multiple changes to allow
the addition of new targets to qbe. The
changes are listed below in decreasing order
of impact.
1. Add a new Target structure.
To add support for a given target, one has to
implement all the members of the Target
structure. All the source files where changed
to use this interface where needed.
2. Single out amd64-specific code.
In this commit, the amd64 target T_amd64_sysv
is the only target available, it is implemented
in the amd64/ directory. All the non-static
items in this directory are prefixed with either
amd64_ or amd64_sysv (for items that are
specific to the System V ABI).
3. Centralize Ops information.
There is now a file 'ops.h' that must be used to
store all the available operations together with
their metadata. The various targets will only
select what they need; but it is beneficial that
there is only *one* place to change to add a new
instruction.
One good side effect of this change is that any
operation 'xyz' in the IL now as a corresponding
'Oxyz' in the code.
4. Misc fixes.
One notable change is that instruction selection
now generates generic comparison operations and
the lowering to the target's comparisons is done
in the emitter.
GAS directives for data are the same for many
targets, so data emission was extracted in a
file 'gas.c'.
5. Modularize the Makefile.
The Makefile now has a list of C files that
are target-independent (SRC), and one list
of C files per target. Each target can also
use its own 'all.h' header (for example to
define registers).
|
|
|
|
|
|
|
|
This was not necessary as temporaries were never freed
and returned from an array zero initialized. But in the
coming load optimization, we sometimes free temporaries
by resetting fn->ntmp.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
int is used all over the place for temporaries,
maybe this should be changed, I don't know.
Another thing to consider is that temporaries
are currently on 12 bits (and will be on 29
or 30 bits in the future), so int will always be
safe to store them. We just loose the free
invariant of non-negativity.
|
|
|
|
|
|
|
