* allow -128 to 255 as a constant for instructions taking a byte sized constants (this is also what GNU As accepts), resolves#32039
git-svn-id: trunk@38316 -
inline assembly, and fixed check after r35959 (mantis #32318)
o can also subscript parameters passed by value on the stack
o can also subscript local variables, the parameters passed by reference
that are subsequently copied into a local
git-svn-id: trunk@37886 -
* changed most of the variables in the assembler readers used to store constants from aint to tcgint
as aint has only the size of the accumular while some CPUs (AVR) allow larger constants in instructions
+ allow access to absolute symbols with address type in inline assembler
* allow absolute addresses in avr inline assembler
+ tests
git-svn-id: trunk@37411 -
from cpubase unit to a method in the tcg class. The reason for doing that is
that this is now a standard part of the 16-bit and 8-bit code generators and
moving to the tcg class allows doing extra checks (not done yet, but for
example, in the future, we can keep track of whether there was an extra
register allocated with getintregister and halt with an internalerror in case
GetNextReg() is called for registers, which weren't allocated as a part of a
sequence, therefore catching a certain class of 8-bit and 16-bit code
generator bugs at compile time, instead of generating wrong code).
- removed GetLastReg() from avr's cpubase unit, because it isn't used for
anything. It might be added to the tcg class, in case it's ever needed, but
for now I've left it out.
* GetOffsetReg() and GetOffsetReg64() were also moved to the tcg unit.
git-svn-id: trunk@37180 -
shiftcount>=size*8-1. This is commonly used by code, that extracts the sign
bit and improves code generation for signed division by power-of-2 as well.
This also fixes building avr-embedded (mantis #32241), which was caused by an
infinite loop in the register allocator, when regvars are enabled, due to too
much register pressure, when building charset.pp after r36842.
git-svn-id: trunk@36867 -
determine whether it's in a register if it's a pure assembler routine
* you can't "index" implicit pointers either using their fields
git-svn-id: trunk@36287 -
directly in inline assembly: that's only possible if it's a register
parameter where the address of the record was passed (rather than the
record itself), or if a parameter has been explicitly typecasted in
Intel-style assembly using ".size"
git-svn-id: trunk@35959 -
directly in inline assembly: that's only possible if it's a register
parameter where the address of the record was passed (rather than the
record itself)
git-svn-id: trunk@35424 -
o separate information for reading and writing, because e.g. in a
try-block, only the writes to local variables and parameters are
volatile (they have to be committed immediately in case the next
instruction causes an exception)
o for now, only references to absolute memory addresses are marked
as volatile
o the volatily information is (should be) properly maintained throughout
all code generators for all archictures with this patch
o no optimizers or other compiler infrastructure uses the volatility
information yet
o this functionality is not (yet) exposed at the language level, it
is only for internal code generator use right now
git-svn-id: trunk@34996 -
