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

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209 8b bytes, + formal verification throughout + dcache dgisselq 1245d 19h /zipcpu/trunk/sw/zasm
202 Additional ZipCPU changes associated w 8b upgrade dgisselq 1985d 03h /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 2084d 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 2160d 01h /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 2221d 06h /zipcpu/trunk/sw/zasm
156 Fixed a compiler warning for an unused result. dgisselq 2252d 22h /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 2285d 21h /zipcpu/trunk/sw/zasm
137 This should (again) fix the bug of trying to build optest.cpp. dgisselq 2306d 01h /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 2306d 22h /zipcpu/trunk/sw/zasm
123 This test now catches and tests some of the pipeline bugs I've been chasing. dgisselq 2316d 20h /zipcpu/trunk/sw/zasm
110 The makefile no longer requires (or supports) building the obsolete machine
code test file optest.
dgisselq 2334d 07h /zipcpu/trunk/sw/zasm
109 This file is now marked as obsolete. dgisselq 2334d 07h /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 2350d 07h /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 2351d 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 2355d 23h /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 2355d 23h /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 2355d 23h /zipcpu/trunk/sw/zasm
98 Added justed longjump instructions from the previous (not used, broken)
functionality to the new LOD (PC),PC functionality.
dgisselq 2355d 23h /zipcpu/trunk/sw/zasm
97 Added longjump instructions. dgisselq 2355d 23h /zipcpu/trunk/sw/zasm
96 Added the longjump functionality, so that the assembler will properly assemble
instructions to arbitrary 32-bit addresses.
dgisselq 2355d 23h /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 2358d 05h /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 2391d 00h /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 2422d 02h /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 2428d 06h /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 2489d 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 2499d 09h /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 2499d 09h /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 2499d 09h /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 2499d 09h /zipcpu/trunk/sw/zasm
51 Added the capability to look at binary files and 'see' characters as they
are encoded in memory.
dgisselq 2499d 09h /zipcpu/trunk/sw/zasm

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