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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 2247d 11h /zipcpu/trunk/
137 This should (again) fix the bug of trying to build optest.cpp. dgisselq 2261d 05h /zipcpu/trunk/
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 2261d 05h /zipcpu/trunk/
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 2261d 05h /zipcpu/trunk/
134 Working updates, to keep this up to date with the RTL code. dgisselq 2262d 02h /zipcpu/trunk/
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 2262d 02h /zipcpu/trunk/
132 Lots of minor bug fixes. dgisselq 2262d 02h /zipcpu/trunk/
131 Fixed a variable use before declaration error. dgisselq 2262d 02h /zipcpu/trunk/
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 2262d 02h /zipcpu/trunk/
129 Bug fix. Fixes some ugly race conditions that would cause code from the wrong
address to be executed.
dgisselq 2262d 02h /zipcpu/trunk/
128 Cleaned up some comments. dgisselq 2262d 02h /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 2262d 02h /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 2262d 02h /zipcpu/trunk/
125 This patch contains minor updates. Two are important to mention: 1) It turns
the compare optimizations back on within the 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 2270d 10h /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
dgisselq 2272d 00h /zipcpu/trunk/
123 This test now catches and tests some of the pipeline bugs I've been chasing. dgisselq 2272d 00h /zipcpu/trunk/
122 This represents a major rewrite of the machine definition file, gcc/config/zip/ 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
dgisselq 2277d 04h /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 2277d 04h /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 2281d 00h /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 2281d 00h /zipcpu/trunk/

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