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<a id="changeset-link" style="font-size:14px;font-weight:600;color:#0068FF;font-size: 14px; color: #0068FF; font-weight: 600;" href="https://github.com/OpenSmalltalk/opensmalltalk-vm/compare/f5ec3f4fa2b6...0f0b5324b6e4">0f0b532 CHANGESET →</a>
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<p id="commit-message" style="margin:0px;font-family:cousine, monospace;font-size:14px;line-height:22px;font-family: cousine, monospace; font-size: 14px; text-align: left; line-height: 22px;">CogVM source as per Name: VMMaker.oscog-eem.2659<br><br>StackInterpreter:<br>Fix awful bug in Context printing (wot I wrote) where the sanitised sp is<br>printed rather than the awful truth. Have the CoInterpreter's interpret<br>use the Cogit;s breakBlock if it has none and the Cogit has one.<br><br>CoInterpreter:<br>Fix a major policy violation. To make doits fast I had made CoInterpreter>><br>executeNewMethod always JIT. But executeNewMethod is used in many more places<br>than primitiveExecuteMethod[ArgsArray], which meant that methods were being<br>over-eagerly jitted (such as in perform:). The Cog policy is only to JIT on<br>second use, or several loop iterations, except for executeMewthod, where we<br>need eager jitting to have jit speed doit performance.<br><br>So introduce executeNewMethodJitting, using it in primitiveExecuteMethod<br>[ArgsArray] to do what it says, and revert executeNewMethod to not JIT (if<br>the method is already jitted it will of course run the jit version).<br><br>Rename activateCoggedNewMethod: to the more comprehensible<br>activateNewCogMethod:inInterpreter:, requiring all clients to pass<br>in the newMethod methodHeader, which is the pointer to the cogMethod.<br><br>Cogit:<br>Use LoadEffectiveAddressMw:r:R: in place of MoveR:R:, AddCq:R: in as many places<br>as possible, including to set SmallInteger tags.<br><br>Improve the IMMUTABILITY store check/immutability trampolines by sharing the<br>stack switch code between the two c ases and oinly taking the branch in the<br>immutable/uncommon case. Hence extract trampoline return in to its own routine.<br><br>Refactor genWriteCResult[High]IntoReg: to do all the necessary checking.<br>Move genLoadStackPointers to Cogit from the backEnd.<br><br>Fix old bug in ARM32 LoadEffectiveAddressMwrR<br>Improve the ARM32 trampoline marshalling code fractionally.<br><br>Fix a slip in Lowcode FFI trampoline generation.<br><br>Gazillions of registers on ARMv8 => add Extra8Reg<br><br>Fix bug in genAlignCStackSavingRegisters:numArgs:wordAlignment:. Must ignore<br>register arguments.<br><br>No need to flush the cache on rewriting prim invocaton if out-of-line literals<br>are used.<br><br>A number of small improvements to context creation as part of reversing the<br>order of comparison of the SPReg with anythin g else, to suit ARMv8.<br><br>Implement and use a full set of ShiftCqRR. Use three argument shifts to save an<br>instruction in converting the result of a division primitive into a SmallInteger,<br>and save an instruction getting the format of an object in at:[put:].<br><br>In calling machine code primitives on RISCs we must save & restore the link<br>register around the call. We haven't noticed this issue before because we only<br>have one mcprim (hashMultiply) and that gets implemeted entirely in generated<br>machine code if a processor implements MulRR.<br><br>Since we're interested in performance and there are typically registers to<br>spare, on RISC define saveAndRestoreLinkRegUsingCalleeSavedRegNotLiveAtPointOfSendAround:<br>instead of using saveAndRestoreLinkRegAround: so that the Linkreg gets written<br>and read from an available callee-saved reg (if available).<br><br>Split the generation of translated hashMultiply into a SmallInteger version and<br>a Large(Positive)Integer version. hashMultiply never fails in SmallInteger.<br><br>Get the ARMv5 "stop" instruction (BKPT) correct.<br><br>Generalize OutOfLineLiteralsManager to function for 64 bits via<br>OutOfLineLiteralsManagerFor64Bits. OutOfLineLiteralsManagerFor64Bits's job is<br>to segregate 32-bit from 64-bit literals for better packing. Change the hack of<br>using operand 1 in a literal to hold the "isSharable/isUnique not" flag to<br>holding both the flag (now as an integer in the LSB) and the literal size<br>(in a four bit field above the LSB).<br><br>Send trampolines must save & restore the link register around the<br>selectorIndexDereferenceRoutine if on a 64-bit RISC.<br><br>Fix poor code for locating the last jump in the PIC prototype.</p>
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