| Rev |
Log message |
Author |
Age |
Path |
| 103 |
A barely functional, but somewhat working, version of GCC to check in.
If the Lord is willing, it should be accompanied by a newlib port soon.
That port should move the GCC status from barely functional but somewhat
working to functional and working, although not (yet) complete. |
dgisselq |
2962d 20h |
/zipcpu/trunk/ |
| 102 |
Updated bugfix version of the binutils patch, and a first patch of GCC.
The GCC patch is undergoing ongoing and active development. It is also known to
continue to contain active bugs. (It's not done yet.) |
dgisselq |
2965d 05h |
/zipcpu/trunk/ |
| 101 |
Adjusted the "BREAK" instruction so that it will now disassemble properly
with an operand. This was necessary to create a (trap_if ...) instruction
for the GCC compiler. |
dgisselq |
2967d 08h |
/zipcpu/trunk/ |
| 100 |
Some changes to support early branching: branches are now ADD #x,PC instructions
instead of MOV #x(PC),PC--providing greater range to the CPU. When that range
is insufficient, ZPARSER now recognizes long jump instructions coded as
LOD (PC),PC followed by the jump address. (This change was made necessary by
the need to build an assembler/linker that could create instructions that would
jump to any address in the 32-bit address space. In short, a part of the
ongoing GCC upgrade and rework.) |
dgisselq |
2967d 08h |
/zipcpu/trunk/ |
| 99 |
Added big-endian versus little-endian functionality. You can now specify which
your input file is as a command line parameter, and zdump will properly
disassemble the file. |
dgisselq |
2967d 08h |
/zipcpu/trunk/ |
| 98 |
Added justed longjump instructions from the previous (not used, broken)
functionality to the new LOD (PC),PC functionality. |
dgisselq |
2967d 08h |
/zipcpu/trunk/ |
| 97 |
Added longjump instructions. |
dgisselq |
2967d 08h |
/zipcpu/trunk/ |
| 96 |
Added the longjump functionality, so that the assembler will properly assemble
instructions to arbitrary 32-bit addresses. |
dgisselq |
2967d 08h |
/zipcpu/trunk/ |
| 95 |
Fixed a bug whereby a mistaken code for CLR was masking a valid LDI of a large
integer value. |
dgisselq |
2969d 14h |
/zipcpu/trunk/ |
| 94 |
These changes make it possible to build binutils-2.25/ here in this
directory. "make binutils" should be all that is necessary to build the
entire binutils package for the Zip CPU.
The default configure script, run from gas-script.sh below, will build and
install these utilities in an install/ subdirectory made below sw/. |
dgisselq |
2994d 11h |
/zipcpu/trunk/ |
| 93 |
A BINUTILS BACKEND IS NOW AVAILABLE!!!! |
dgisselq |
3002d 09h |
/zipcpu/trunk/ |
| 92 |
Adjustments made to match the simplified early branching. |
dgisselq |
3002d 09h |
/zipcpu/trunk/ |
| 91 |
Minor updates. |
dgisselq |
3002d 09h |
/zipcpu/trunk/ |
| 90 |
Removed MOV x(PC),PC from the list of possible early branching instructions.
ADD X,PC and LDI X,PC are now the only recognized early branching instructions.
This was done to spare logic, although I don't think I spared more than a
LUT or two. |
dgisselq |
3002d 09h |
/zipcpu/trunk/ |
| 89 |
Minor changes, to include making default branching an ADD.[condition] X,PC
instruction, rather than allowing both MOV X(PC),PC and ADD X,PC instructions.
Further zopcodes.cpp contains several bug fixes. |
dgisselq |
3002d 09h |
/zipcpu/trunk/ |
| 88 |
Eliminated some warnings. The div fixes were to simplify the logic, even though
the result is less readable ... |
dgisselq |
3026d 08h |
/zipcpu/trunk/ |
| 87 |
Adjusted the operator input line to reflect actual logic inputs, rather
than the registered inputs which may have been out of date. (Indeed, they
were out of date for the bug I was chasing and fixed ...) |
dgisselq |
3028d 07h |
/zipcpu/trunk/ |
| 86 |
Removed the requirement to have the dev.scope.cpu hardware defined outside
of the Zip CPU (it was defined in another project). This was causing a bus
error in the simulator (which it should have), but taking it out fixes things
in the simulator (while removing capability from one special piece of H/W). |
dgisselq |
3028d 07h |
/zipcpu/trunk/ |
| 85 |
Minor update/correction to operand B definition. |
dgisselq |
3028d 07h |
/zipcpu/trunk/ |
| 84 |
Minor updates. |
dgisselq |
3028d 07h |
/zipcpu/trunk/ |
