hardcoded registers for the most part)
+ added extra g_exception_discard_reason() that can be called when we only
want to get rid of the currently pushed exception reason, and don't have
to load it (so it can do nothing on platforms that don't use push/pop)
git-svn-id: branches/hlcgllvm@28481 -
specified, but equal to DS in the current memory model -> call the high level
code generator with a near pointer type in order to force the segment to be
ignored
git-svn-id: trunk@27716 -
segment to survive e.g. several nested vecnodes, which cause the base register
to change from BP to something else. In the cases where the ss: prefix is not
needed, it is removed by make_simple_ref.
+ remove the ss: prefix in the several cases where make_simple_ref isn't called
(namely spilling and tcg8086.a_call_reg_far)
git-svn-id: trunk@27714 -
after r27581 in regard to floating point comparisons. The tcmpnan.pp test now
almost works (i.e. fails due to only one error, instead of many).
git-svn-id: trunk@27605 -
+ added helper function to i8086's symcpu is_proc_far that dispatches the call
to the proper is_far method (because we can't make a cpu specific descendant
of tabstractprocdef and add it there)
* all checks for (po_far in procoptions) in the i8086 code generator replaced
with calls to is_proc_far
git-svn-id: trunk@27559 -
+ x86 targets now directly call procedure variables located in references.
- a_call_ref method removed from tcg and thlcgobj.
git-svn-id: trunk@26666 -
tcg8086.a_op_const_reg, when the target CPU is 8086/8088, because it's
supposed to be faster on these processors, according to Intel's instruction
timings.
git-svn-id: trunk@26493 -
tcg8086.a_op_const_reg, since that optimization is already done in
optimize_op_const, which is called earlier in the same method.
git-svn-id: trunk@26488 -
overflow checking should not be implemented there. It should only leave the
flags in place for the jo instruction, which the IMUL instruction already
does.
git-svn-id: trunk@26487 -
size is >=16-bit:
o Generated code is now one instruction and one byte shorter.
o No 8-bit subregisters are used, which reduces register pressure.
git-svn-id: trunk@26336 -
tcg8086.a_load_reg_ref, which additionally fixes the following issues:
o The higher parts of the source register is no longer modified.
o The source register's size is no longer modified with makeregsize.
o Conversion from OS_S8 to a larger size is now supported.
git-svn-id: trunk@26335 -
o When expanding from a OS_8 to a 16-bit or 32-bit tcgsize, use the R_SUBH
subregister to initialize the high 16 bits of the register to zero. This
generates shorter and faster code, without increasing register
interferences, because R_SUBH has the same register constraints on i8086 as
R_SUBL, which is already used on the same imaginary register.
o After performing operations on the 8-bit subparts of a register that was
initially 16-bit, call makeregsize(OS_16) to notify the register allocator
that the register is once again 16-bit.
git-svn-id: trunk@26328 -
dest are subregisters of the same superregister, but of different sizes:
o Do not emit spurious moves from a register to the same register.
o Correctly support the case when converting from 16-bit to 32-bit int.
Previously it didn't work correctly, because in this particular case, due
to the way the GetNextReg scheme works, we have reg1=reg2.
git-svn-id: trunk@26313 -
- use a_op_const_reg for the multiplication, instead of emitting directly
instructions, which are 186+
- avoid using IMUL twice, when the element size is not power of two
- rm the system_i386_win32 leftovers
git-svn-id: trunk@25826 -
OP_OR or OP_XOR operation into two 16-bit parts, call a_op_const_reg/ref
recursively for the 16-bit parts, so certain optimizations can be done if the
low or high 16-bit of the const are $ffff.
git-svn-id: trunk@25703 -
