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[/] [zipcpu/] [trunk/] [rtl/] - Rev 196

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Rev Log message Author Age Path
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 2911d 21h /zipcpu/trunk/rtl/
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 2926d 12h /zipcpu/trunk/rtl/
132 Lots of minor bug fixes. dgisselq 2926d 12h /zipcpu/trunk/rtl/
131 Fixed a variable use before declaration error. dgisselq 2926d 12h /zipcpu/trunk/rtl/
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 2926d 12h /zipcpu/trunk/rtl/
129 Bug fix. Fixes some ugly race conditions that would cause code from the wrong
address to be executed.		 dgisselq 2926d 12h /zipcpu/trunk/rtl/
128 Cleaned up some comments. dgisselq 2926d 12h /zipcpu/trunk/rtl/
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 2945d 13h /zipcpu/trunk/rtl/
115 A bug fix, applies to when there are more than 9 interrupt lines into the CPU. dgisselq 2945d 20h /zipcpu/trunk/rtl/
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 2969d 21h /zipcpu/trunk/rtl/

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