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[/] [zipcpu/] [trunk/] [sw/] [zasm/] - Rev 209

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Rev Log message Author Age Path
209 8b bytes, + formal verification throughout + dcache dgisselq 1943d 16h /zipcpu/trunk/sw/zasm/
202 Additional ZipCPU changes associated w 8b upgrade dgisselq 2683d 00h /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 2782d 08h /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 2857d 22h /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 2919d 03h /zipcpu/trunk/sw/zasm/
156 Fixed a compiler warning for an unused result. dgisselq 2950d 19h /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 2983d 18h /zipcpu/trunk/sw/zasm/
137 This should (again) fix the bug of trying to build optest.cpp. dgisselq 3003d 22h /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 3004d 19h /zipcpu/trunk/sw/zasm/
123 This test now catches and tests some of the pipeline bugs I've been chasing. dgisselq 3014d 17h /zipcpu/trunk/sw/zasm/
110 The makefile no longer requires (or supports) building the obsolete machine
code test file optest.
dgisselq 3032d 04h /zipcpu/trunk/sw/zasm/
109 This file is now marked as obsolete. dgisselq 3032d 04h /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 3048d 04h /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 3049d 09h /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 3053d 20h /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 3053d 20h /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 3053d 20h /zipcpu/trunk/sw/zasm/
98 Added justed longjump instructions from the previous (not used, broken)
functionality to the new LOD (PC),PC functionality.
dgisselq 3053d 20h /zipcpu/trunk/sw/zasm/
97 Added longjump instructions. dgisselq 3053d 20h /zipcpu/trunk/sw/zasm/
96 Added the longjump functionality, so that the assembler will properly assemble
instructions to arbitrary 32-bit addresses.
dgisselq 3053d 20h /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 3056d 02h /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 3088d 21h /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 3119d 23h /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 3126d 03h /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 3187d 03h /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 3197d 06h /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 3197d 06h /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 3197d 06h /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 3197d 06h /zipcpu/trunk/sw/zasm/
51 Added the capability to look at binary files and 'see' characters as they
are encoded in memory.
dgisselq 3197d 06h /zipcpu/trunk/sw/zasm/

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