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 -
* ti8086.moddivnode.pass_generate_code: use cg.a_op_const_reg, instead of
emit_const_reg, in order to support generating plain 8086/8088 code
(shr/shl/sar reg,const is 186+ if const is >= 2).
git-svn-id: trunk@26063 -
using it in inline asm causes an internal error and removing it didn't show
any regressions after running the testsuite on i386-linux.
git-svn-id: trunk@25827 -
- 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 -
cgobj.pas, tcg:
* g_save_registers: add the amount of used address registers to size as well
* g_save_registers: save all used address registers
* g_restore_registers: restore all stored address registers
m68k/cpubase.pas:
* rename saved_standard_address_registers to saved_address_registers
all other platform's cpubase.{inc,pas} (except alpha, ia64 and vis which are not up to date):
* add a saved_address_registers variable with one entry of RS_INVALID
At least a "make fullcycle" did complete.
git-svn-id: trunk@25664 -
