| Rev |
Log message |
Author |
Age |
Path |
| 209 |
8b bytes, + formal verification throughout + dcache |
dgisselq |
1858d 18h |
/zipcpu/trunk/sw/zasm |
| 202 |
Additional ZipCPU changes associated w 8b upgrade |
dgisselq |
2598d 02h |
/zipcpu/trunk/sw/zasm |
| 200 |
Lots of GCC bugs fixed, some new features added, longs should work now. The
build scripts have also been updated and simplified. |
dgisselq |
2697d 10h |
/zipcpu/trunk/sw/zasm |
| 188 |
Adjusted the opcodes to match the binutils port: added RTN instructions, and
allowed BREAK instructions to include an immediate--to be interpreted by the
debugger. |
dgisselq |
2773d 00h |
/zipcpu/trunk/sw/zasm |
| 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 |
2834d 05h |
/zipcpu/trunk/sw/zasm |
| 156 |
Fixed a compiler warning for an unused result. |
dgisselq |
2865d 21h |
/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 |
2898d 20h |
/zipcpu/trunk/sw/zasm |
| 137 |
This should (again) fix the bug of trying to build optest.cpp. |
dgisselq |
2919d 00h |
/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 |
2919d 21h |
/zipcpu/trunk/sw/zasm |
| 123 |
This test now catches and tests some of the pipeline bugs I've been chasing. |
dgisselq |
2929d 19h |
/zipcpu/trunk/sw/zasm |
| 110 |
The makefile no longer requires (or supports) building the obsolete machine
code test file optest. |
dgisselq |
2947d 06h |
/zipcpu/trunk/sw/zasm |
| 109 |
This file is now marked as obsolete. |
dgisselq |
2947d 06h |
/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 |
2963d 06h |
/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 |
2964d 11h |
/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 |
2968d 22h |
/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 |
2968d 22h |
/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 |
2968d 22h |
/zipcpu/trunk/sw/zasm |
| 98 |
Added justed longjump instructions from the previous (not used, broken)
functionality to the new LOD (PC),PC functionality. |
dgisselq |
2968d 22h |
/zipcpu/trunk/sw/zasm |
| 97 |
Added longjump instructions. |
dgisselq |
2968d 22h |
/zipcpu/trunk/sw/zasm |
| 96 |
Added the longjump functionality, so that the assembler will properly assemble
instructions to arbitrary 32-bit addresses. |
dgisselq |
2968d 22h |
/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 |
2971d 04h |
/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 |
3003d 23h |
/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 |
3035d 01h |
/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 |
3041d 05h |
/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 |
3102d 06h |
/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 |
3112d 08h |
/zipcpu/trunk/sw/zasm |
| 54 |
This builds on the support for backslash character escapes in both single
and multicharacter expressions. Backslash character escapes are now
possible with quotations and backslashes, and the same code to interpret
the escapes is applied to both single and multicharacter sequences. |
dgisselq |
3112d 08h |
/zipcpu/trunk/sw/zasm |
| 53 |
Updated the #include/#define directives to work properly for nested includes.
(They were supposed to work properly for nested includes before ... and didn't)
This fixes those bugs. |
dgisselq |
3112d 08h |
/zipcpu/trunk/sw/zasm |
| 52 |
Added the capability to "see" character's encoded within a binary file,
by printing the character value(s) of each opcode (if they are printable)
on each line. |
dgisselq |
3112d 08h |
/zipcpu/trunk/sw/zasm |
| 51 |
Added the capability to look at binary files and 'see' characters as they
are encoded in memory. |
dgisselq |
3112d 08h |
/zipcpu/trunk/sw/zasm |
