| Rev |
Log message |
Author |
Age |
Path |
| 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 |
3059d 11h |
/zipcpu/trunk/sw/zasm/ |
| 137 |
This should (again) fix the bug of trying to build optest.cpp. |
dgisselq |
3079d 15h |
/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 |
3080d 12h |
/zipcpu/trunk/sw/zasm/ |
| 123 |
This test now catches and tests some of the pipeline bugs I've been chasing. |
dgisselq |
3090d 10h |
/zipcpu/trunk/sw/zasm/ |
| 110 |
The makefile no longer requires (or supports) building the obsolete machine
code test file optest. |
dgisselq |
3107d 21h |
/zipcpu/trunk/sw/zasm/ |
| 109 |
This file is now marked as obsolete. |
dgisselq |
3107d 21h |
/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 |
3123d 21h |
/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 |
3125d 02h |
/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 |
3129d 13h |
/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 |
3129d 13h |
/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 |
3129d 13h |
/zipcpu/trunk/sw/zasm/ |
| 98 |
Added justed longjump instructions from the previous (not used, broken)
functionality to the new LOD (PC),PC functionality. |
dgisselq |
3129d 13h |
/zipcpu/trunk/sw/zasm/ |
| 97 |
Added longjump instructions. |
dgisselq |
3129d 13h |
/zipcpu/trunk/sw/zasm/ |
| 96 |
Added the longjump functionality, so that the assembler will properly assemble
instructions to arbitrary 32-bit addresses. |
dgisselq |
3129d 13h |
/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 |
3131d 19h |
/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 |
3164d 14h |
/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 |
3195d 16h |
/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 |
3201d 20h |
/zipcpu/trunk/sw/zasm/ |
| 60 |
Fixed assembler processing of jump instructions, so that the new fast
return instruction can be used. The test file was modified to test
pipelined value passing within the CPU. That's where the value gets
(re)used before being stored back in the register file. As of this release,
all tests work. |
dgisselq |
3262d 21h |
/zipcpu/trunk/sw/zasm/ |
| 55 |
A test was added to double check whether carry following right shifts worked.
This was a necessary part of getting two cycle linear feedback shift register
operations working for a memory test on a XuLA2 board. With this, I can now
verify that such feedback registers work for pseudorandom number purposes. |
dgisselq |
3272d 23h |
/zipcpu/trunk/sw/zasm/ |
