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[/] [zipcpu] - Rev 125

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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 2970d 16h /zipcpu
104 An updated build script, actually builds zip-gcc. dgisselq 2971d 16h /zipcpu
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 2971d 20h /zipcpu
102 Updated bugfix version of the binutils patch, and a first patch of GCC.
The GCC patch is undergoing ongoing and active development. It is also known to
continue to contain active bugs. (It's not done yet.)		 dgisselq 2974d 05h /zipcpu
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 2976d 08h /zipcpu
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 2976d 08h /zipcpu
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 2976d 08h /zipcpu
98 Added justed longjump instructions from the previous (not used, broken)
functionality to the new LOD (PC),PC functionality.		 dgisselq 2976d 08h /zipcpu
97 Added longjump instructions. dgisselq 2976d 08h /zipcpu
96 Added the longjump functionality, so that the assembler will properly assemble
instructions to arbitrary 32-bit addresses.		 dgisselq 2976d 08h /zipcpu

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