| Rev |
Log message |
Author |
Age |
Path |
| 165 |
Added a test to make certain that the arithmetic right shift was properly
propagating the high order bit. (The test works under verilator, but didn't
initially work in Xilinx -- thus a difference between the two.) |
dgisselq |
2862d 00h |
/zipcpu/trunk/sw/zasm |
| 156 |
Fixed a compiler warning for an unused result. |
dgisselq |
2893d 16h |
/zipcpu/trunk/sw/zasm |
| 143 |
This section belatedly adjusts the zasm assembler so that it can handle
the LONG_MPY changes that have taken place. However, the test.S assembler
test script is still not properly testing the multiplies--at least it will
succeed on everything else. |
dgisselq |
2926d 15h |
/zipcpu/trunk/sw/zasm |
| 137 |
This should (again) fix the bug of trying to build optest.cpp. |
dgisselq |
2946d 19h |
/zipcpu/trunk/sw/zasm |
| 126 |
Lots of changes preparing the assembly for an instruction set change. While
implemented, they are still commented out via #ifdef LONG_MPY. By defining
LONG_MPY, this new change set will take place. |
dgisselq |
2947d 17h |
/zipcpu/trunk/sw/zasm |
| 123 |
This test now catches and tests some of the pipeline bugs I've been chasing. |
dgisselq |
2957d 15h |
/zipcpu/trunk/sw/zasm |
| 110 |
The makefile no longer requires (or supports) building the obsolete machine
code test file optest. |
dgisselq |
2975d 01h |
/zipcpu/trunk/sw/zasm |
| 109 |
This file is now marked as obsolete. |
dgisselq |
2975d 01h |
/zipcpu/trunk/sw/zasm |
| 105 |
Fixed some nasty early branching bugs. Adjusted the Makefile to declare that
cpudefs.h was automatically generated from cpudefs.v, and made sure that
zipbones included the cpudefs.v so it could get the DEBUG_SCOPE define.
In addition, the test.S was updated to test long jumps, the early branching
bug we found, and all three early branching instructions: ADD #x,PC, LOC(PC),PC,
and LDI #x,PC. |
dgisselq |
2991d 01h |
/zipcpu/trunk/sw/zasm |
| 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 |
2992d 06h |
/zipcpu/trunk/sw/zasm |
| 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 |
2996d 17h |
/zipcpu/trunk/sw/zasm |
| 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 |
2996d 17h |
/zipcpu/trunk/sw/zasm |
| 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 |
2996d 17h |
/zipcpu/trunk/sw/zasm |
| 98 |
Added justed longjump instructions from the previous (not used, broken)
functionality to the new LOD (PC),PC functionality. |
dgisselq |
2996d 18h |
/zipcpu/trunk/sw/zasm |
| 97 |
Added longjump instructions. |
dgisselq |
2996d 18h |
/zipcpu/trunk/sw/zasm |
| 96 |
Added the longjump functionality, so that the assembler will properly assemble
instructions to arbitrary 32-bit addresses. |
dgisselq |
2996d 18h |
/zipcpu/trunk/sw/zasm |
| 95 |
Fixed a bug whereby a mistaken code for CLR was masking a valid LDI of a large
integer value. |
dgisselq |
2999d 00h |
/zipcpu/trunk/sw/zasm |
| 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 |
3031d 19h |
/zipcpu/trunk/sw/zasm |
| 70 |
Updated the assembler support files, zopcodes in particular, to handle
the disassembly of the new very long instruction word codes. |
dgisselq |
3062d 20h |
/zipcpu/trunk/sw/zasm |
| 69 |
This implements the "new Instruction Set" architecture for the Zip CPU. It's
a massive change set, that touches just about everything but probably not
enough of everything. Please see the spec.pdf for a description of this
new architecture. |
dgisselq |
3069d 01h |
/zipcpu/trunk/sw/zasm |
