| Rev |
Log message |
Author |
Age |
Path |
| 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 |
2903d 21h |
/zipcpu/ |
| 142 |
Bug fix--fixes some problems with conditional execution, as well as removing
an unnecessary peephole optimization. |
dgisselq |
2904d 22h |
/zipcpu/ |
| 141 |
Fixes two bugs: one causing merged strings in the read only string section to
be referenced at the wrong address, and the second which caused the assembler
to fail at SYMBOL-OFFSET references. |
dgisselq |
2904d 22h |
/zipcpu/ |
| 140 |
Minor changes, but fixes build of zippy_tb.cpp. |
dgisselq |
2907d 11h |
/zipcpu/ |
| 139 |
Changes necessary to document the changed instruction set: LDIHI became MPY,
and MPYU and MPYS became MPYUHI and MPYSHI respectively. See the specification
for more details. |
dgisselq |
2910d 08h |
/zipcpu/ |
| 138 |
This updates the CPU multiply instruction into a set of three instructions.
MPY is a 32x32-bit multiply instruction, returning the low 32-bit result,
MPYUHI returns the upper 32-bits assuming the result was unsigned and MPYSHI
returns the upper 32-bits assuming the result was signed. |
dgisselq |
2910d 08h |
/zipcpu/ |
| 137 |
This should (again) fix the bug of trying to build optest.cpp. |
dgisselq |
2924d 02h |
/zipcpu/ |
| 136 |
Oops --- missed a couple HOST_WIDE_INT values in a printf. This casts them
to (long), so that we can work on both PC's and ARMs. |
dgisselq |
2924d 02h |
/zipcpu/ |
| 135 |
Replaced all occurrences of INTVAL(...) on printf lines with (long)INTVAL(...).
This should fix the problems zip-gcc was having while running on the ARM. |
dgisselq |
2924d 02h |
/zipcpu/ |
| 134 |
Working updates, to keep this up to date with the RTL code. |
dgisselq |
2924d 23h |
/zipcpu/ |
| 133 |
Changes preceding an instruction set update, which will change the multiply
operation from a 16x16 bit multiply to three types of 32x32-bit multiplies. |
dgisselq |
2924d 23h |
/zipcpu/ |
| 132 |
Lots of minor bug fixes. |
dgisselq |
2924d 23h |
/zipcpu/ |
| 131 |
Fixed a variable use before declaration error. |
dgisselq |
2924d 23h |
/zipcpu/ |
| 130 |
Simplified the lock logic, and removed it when pipelining was not defined. This
also means the file is now dependent upon cpudefs.v. In another change, brev
was modified so as not to update the flags. This makes it useable with GCC
as a potential move or load immediate instruction. |
dgisselq |
2924d 23h |
/zipcpu/ |
| 129 |
Bug fix. Fixes some ugly race conditions that would cause code from the wrong
address to be executed. |
dgisselq |
2924d 23h |
/zipcpu/ |
| 128 |
Cleaned up some comments. |
dgisselq |
2924d 23h |
/zipcpu/ |
| 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 |
2924d 23h |
/zipcpu/ |
| 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 |
2924d 23h |
/zipcpu/ |
| 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 |
2933d 07h |
/zipcpu/ |
| 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 |
2934d 21h |
/zipcpu/ |
| 123 |
This test now catches and tests some of the pipeline bugs I've been chasing. |
dgisselq |
2934d 21h |
/zipcpu/ |
| 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 |
2940d 01h |
/zipcpu/ |
| 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 |
2940d 01h |
/zipcpu/ |
| 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 |
2943d 20h |
/zipcpu/ |
| 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 |
2943d 21h |
/zipcpu/ |
| 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 |
2943d 23h |
/zipcpu/ |
| 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 |
2944d 07h |
/zipcpu/ |
| 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 |
2944d 07h |
/zipcpu/ |
| 115 |
A bug fix, applies to when there are more than 9 interrupt lines into the CPU. |
dgisselq |
2944d 07h |
/zipcpu/ |
| 114 |
Fixes a bug that killed make binutils before the build-gas directory
was created. |
dgisselq |
2949d 08h |
/zipcpu/ |
