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[/] [zipcpu/] [trunk/] - Rev 129

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129 Bug fix. Fixes some ugly race conditions that would cause code from the wrong
address to be executed.
dgisselq 2897d 16h /zipcpu/trunk/
128 Cleaned up some comments. dgisselq 2897d 16h /zipcpu/trunk/
127 Lots of changes and bugfixes. The disassembler produces more readable output.
The assembler and linker will no longer automatically use LDIHI--in preparation
for switching to LONG_MPY. LDIHI/LDILO pairs have been changed to BREV/LDILO
pairs. Within the compiler, conditional moves have been rebuilt. They're not
perfect yet, but they are better. Lots of peephole optimizations, etc.
dgisselq 2897d 16h /zipcpu/trunk/
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 2897d 16h /zipcpu/trunk/
125 This patch contains minor updates. Two are important to mention: 1) It turns
the compare optimizations back on within the zip.md file, and 2) it fixes an
internal compiler fault that was causing the compiler to such up all of my
memory in an infinite recursion.
dgisselq 2906d 00h /zipcpu/trunk/
124 Lots of changes, lots of bugfixes--both to the compiler as well as to the
assembler. (Ex: the assembler will now properly execute a LDI _sym+5,R0).
Many compiler optimizations have been turned off, however. They will probably
be turned back on in the near future--once I get this version proven without
them.
dgisselq 2907d 14h /zipcpu/trunk/
123 This test now catches and tests some of the pipeline bugs I've been chasing. dgisselq 2907d 14h /zipcpu/trunk/
122 This represents a major rewrite of the machine definition file, gcc/config/zip/
zip.md. In particular, the architecture has been changed from a "cc0"
architecture to one with a specific CC_REG and CCmode. Instructions in the
machine definition file must now explicitly set this register with their
results. The result is better condition code handling, better usage of the
conditional execution modes of certain instructions, and even some decent
optimizations.
dgisselq 2912d 18h /zipcpu/trunk/
121 Fixed the bug whereby BGE instructions dissassembled as BGT instructions and
vice versa. Loads and stores of absolute addresses now show those addresses
in ($<>). The assembler also accepts integer offsets to symbols, although
it isn't clear that it does the "right" thing with them yet.
dgisselq 2912d 18h /zipcpu/trunk/
120 Should've regression tested that last build. This one fixes what that last
fix broke: Registers with offsets (i.e. operand-B) now work (again).
dgisselq 2916d 14h /zipcpu/trunk/
119 Fixed some limits bugs. Now LDI.Z 1 produces LDIHI.Z 0, LDOLO.Z 1 as desired
instead of the erroneous BREV.Z 0. Likewise, loading 0x80000000 no longer
produces a clear instruction, but actually loads the value of interest.
dgisselq 2916d 14h /zipcpu/trunk/
118 Fixes two bugs: 1) in the early branching code within the instruction decoder.
This prevented the early branching from working when built with Xilinx's tools,
while the code worked with Verilator. 2) The CPU was not working with the
traditional cache and early branching disabled. These two bugs masked each
other. The replacement code is simpler.
dgisselq 2916d 17h /zipcpu/trunk/
117 Bug fixes: This adds the zip_ucc() instruction as a builtin, fixes the zip_cc()
builtin (both are now unspec_volatile) together with fixing the *_context(int*)
builtins so that they use five registers, never four. Further, this fixes the
negative stack space offset bug. Many of the GCC files now have Zip debugging
hooks within them as well, to simplify further debugging of the compiler.
dgisselq 2917d 01h /zipcpu/trunk/
116 Updated binutils. This fixes problems with linking global variables, fixes
the map file report, adjusts the LJMP instruction disassembly to display the
resulting address, as well as in general fixing up link problems when
sizeof(byte) is 32-bits.
dgisselq 2917d 01h /zipcpu/trunk/
115 A bug fix, applies to when there are more than 9 interrupt lines into the CPU. dgisselq 2917d 01h /zipcpu/trunk/
114 Fixes a bug that killed make binutils before the build-gas directory
was created.
dgisselq 2922d 02h /zipcpu/trunk/
113 Bug fix: the Makefile wasn't building gcc, and the binutils would not allocate
space for common variables or zero'd (bss) variables properly. Several binutils
bugs were fixed to get variables to be allocated properly. Those are
reflected in this updated patch.
dgisselq 2922d 05h /zipcpu/trunk/
112 Removed some debugging code from the compiler. dgisselq 2925d 01h /zipcpu/trunk/
111 Bug fix compiler update! This fixes a lot of the bugs associated with the
previous compiler release.
dgisselq 2925d 01h /zipcpu/trunk/
110 The makefile no longer requires (or supports) building the obsolete machine
code test file optest.
dgisselq 2925d 01h /zipcpu/trunk/

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