Vm-dev February 2023

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34 discussions

[OpenSmalltalk/opensmalltalk-vm] BitBlt rgbMul is broken for depth 1 and not correctly rounded above depth 4 (Issue #651)
by Nicolas Cellier 24 Nov '23

24 Nov '23

In depth 1, the resulting bits will always be 0. It's not a big problem because rgbMul is just a bitAnd operation at this depth. So a quick workaround would be to detect the case in BitBltSimulation destDepth = 1 ifTrue: [^self bitAnd: sourceWord with: destinationWord]. That would also accelerate the Bit BLock Transfer operation, so it's a good hack. But there is more. What we want is multiply ratios in interval [0,1]. dstRatio * srcRatio Our implementation is scaled ratio (scaled by `1 << nBits - 1`): src := (srcRatio * scale) rounded. dst := (dstRatio * scale) rounded. So what we want is: ((dst/scale) * (src/scale) * scale) rounded that is: (dst*src / (1<<nBits-1)) rounded Unfortunately, that's the other grief with the current implementation used for rounding: (dst+1)*(src+1) - 1 >> nBits It only equals correctly rounded operation for depths 2 and 4. For rounding we might use: (((dst/scale) * (src/scale) + 0.5) * scale) truncated. that is expressed with truncated division: dst*src + (scale+1//2) // scale So here is a nicer formulation for doing the job at any depth (including 5bits rgb channels for 16 bits depth) with correctly rounded division: aux := src * dst + (1 << (nBits - 1)). "add mid-scale for rounding" result := aux << (nBits - 1) + aux << (nBits -1). "divide by scale" This is because instead of dividing by scale, we can multiply by shifted inverse (sort of double precision), then shift right. (2 to: 32) allSatisfy: [:nBits | (1 << (nBits * 2) / (1 << nBits - 1)) rounded = (1 << nBits + 1)]. Multiplying by this inverse is easy and cheap: x * (1 << nBits + 1) = (x << nBits + x). And then applying the right shift `>> (2 * nBits)` is equivalent to: x >> nBits + x >> nBits. We must first add 0.5 (scaled), that is `src * dst + (1 << (nBits -1))` - our formulation of aux, and we're done. We verify: { (0 to: 1<<20-1) allSatisfy: [:i | (1<<9+i)>>10+ (1<<9+i)>>10 = (i/1023) rounded]. (0 to: 1<<18-1) allSatisfy: [:i | (1<<8+i)>>9+ (1<<8+i)>>9 = (i/511) rounded]. (0 to: 1<<16-1) allSatisfy: [:i | (1<<7+i)>>8+ (1<<7+i)>>8 = (i/255) rounded]. (0 to: 1<<14-1) allSatisfy: [:i | (1<<6+i)>>7+ (1<<6+i)>>7 = (i/127) rounded]. (0 to: 1<<12-1) allSatisfy: [:i | (1<<5+i)>>6+ (1<<5+i)>>6 = (i/63) rounded]. (0 to: 1<<10-1) allSatisfy: [:i | (1<<4+i)>>5+ (1<<4+i)>>5 = (i/31) rounded]. (0 to: 1<<8-1) allSatisfy: [:i | (1<<3+i)>>4+ (1<<3+i)>>4 = (i/15) rounded]. (0 to: 1<<6-1) allSatisfy: [:i | (1<<2+i)>>3+ (1<<2+i)>>3 = (i/7) rounded]. (0 to: 1<<4-1) allSatisfy: [:i | (1<<1+i)>>2+ (1<<1+i)>>2 = (i/3) rounded]. } allSatisfy: #yourself. The nice thing is that above down-scaling operation can be multiplexed. Suppose that we have p groups of 2*nBits `M` holding square-scale multiplication of each channel concatenated in a double-Word-Mul. doubleWordMul = Mp .... M5 M3 M1 Note we arrange to have odd channels in low word, and even channels in high word. We first form a `groupMask` on a word with (p+1)/2 groups of nBits alternating all one `i` and all zero `o`, `oioi...ioi`. channelMask := 1 << nBits - 1. groupMask := 0. 0 to: wordBits // (2 * nBits) do: [:i | groupMask = groupMask << (2 * nBits) + channelMask]. Where wordBits is the number of bits in a word (usually we want to operate on 32 bits words in BitBlt). We form the `doubleGroupMask` on a double-word with p groups of 2*nBits `oi`: doubleGroupMask := groupMask >> nBits. doubleGroupMask := doubleGroupMask << wordBits + groupMask. And we perform the division by scale: doubleWordMul := (doubleWordMul >> nBits bitAnd: doubleGroupMask) + doubleWord >> nBits bitAnd: doubleGroupMask. At this stage we obtain a double word containing scaled multiplicands interleaved with groups of nBits zeros: o mp ... o m3 o m1 Now the final result can be obtained by shifting back: doubleWordMul >> (wordBits - nBits) + (doubleWordMul bitAnd: groupMask) The only problem remaining is how to obtain the squared-scale multiplicands. It would be easy to form the alternate even-odd channels for each src and dst operands: doubleWordSrc := src >> nBits bitAnd: groupMask. doubleWordSrc := doubleWordSrc << wordBits + (src bitAnd: groupMask). doubleWordDst := dst >> nBits bitAnd: groupMask. doubleWordDst := doubleWordDst << wordBits + (dst bitAnd: groupMask). we now get `o sp ... o s3 o s1` and `0 dp ... o d3 o d1`, but we would now need a SIMD integer multiplication operating on groups of 2*nBits in parallel... We don't have that, at least in portable C code. So we still have to emulate it with a loop. half := 1 << (nBits - 1). shift := 0. doubleWordMul := 0 0 to: nChannels - 1 do: [:i | doubleWordMul := doubleWordMul + (((doubleWordSrc >> shift bitAnd: channelMask) * (doubleWordSrc >> shift bitAnd: channelMask) + half) << shift). shift := shift + nBits + nBits]. We know that each operation cannot overflow on upper neighbour group of 2*nBits, because the maximum value is: (1<<nBits-1) squared + (1 << (nBits-1)) = 1 << (2*nBits) - (2*(1<<nBits)) + (1 << (nBits-1)) - 1 < (1 << (2*nBits) - 1) It remains the odd case of 16 bits depth, which has 3 groups of 5 bits and a leading zero. I believe that above algorithm works without splitting in two half-words... To be tested. We have gathered the pieces for a correctly rounded almost-multiplexed rgbMul. Somehow have our cake and eat it too. -- Reply to this email directly or view it on GitHub: https://github.com/OpenSmalltalk/opensmalltalk-vm/issues/651 You are receiving this because you are subscribed to this thread. Message ID: <OpenSmalltalk/opensmalltalk-vm/issues/651(a)github.com>

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[OpenSmalltalk/opensmalltalk-vm] Allow choosing an image via zenity when no arguments are provided (#408)
by Leon Matthes 05 Jun '23

05 Jun '23

You can view, comment on, or merge this pull request online at: https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/408 -- Commit Summary -- * Add file chooser dialog to squeak.sh.in * Add file chooser dialog to bin.squeak.sh.in -- File Changes -- M platforms/unix/config/bin.squeak.sh.in (13) M platforms/unix/config/squeak.sh.in (13) -- Patch Links -- https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/408.patch https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/408.diff -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/408

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[OpenSmalltalk/opensmalltalk-vm] Revise docs on HowToBuild on Windows: cygwin tools must be in PATH [ci skip] (PR #657)
by Christoph Thiede 21 Mar '23

21 Mar '23

Otherwise, `MAKEDEBUG.BAT` & Co. might fail if some tools (such as `tee`) are not found. You can view, comment on, or merge this pull request online at: https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/657 -- Commit Summary -- * docs on HowToBuild on Windows: cygwin tools must be in PATH [ci skip] -- File Changes -- M building/win32x86/HowToBuild (1) M building/win64x64/HowToBuild (1) -- Patch Links -- https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/657.patch https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/657.diff -- Reply to this email directly or view it on GitHub: https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/657 You are receiving this because you are subscribed to this thread. Message ID: <OpenSmalltalk/opensmalltalk-vm/pull/657(a)github.com>

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[OpenSmalltalk/opensmalltalk-vm] 579d9e: Fix a regression in unbuffered modes of the win32 ...
by Eliot Miranda 27 Feb '23

27 Feb '23

Branch: refs/heads/virtend Home: https://github.com/OpenSmalltalk/opensmalltalk-vm Commit: 579d9ed8df21afa7c0b724635e30e6c4cf71a9ed https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/579d9ed8df21afa7c0… Author: Eliot Miranda <eliot.miranda(a)gmail.com> Date: 2023-02-26 (Sun, 26 Feb 2023) Changed paths: M platforms/win32/plugins/CameraPlugin/winCameraOps.cpp Log Message: ----------- Fix a regression in unbuffered modes of the win32 CameraPlugin introduced in commit d51c1ac377067d3e469c111a15d85d4aaa187393 Author: Eliot Miranda <eliot.miranda(a)gmail.com> Date: Mon Feb 13 16:53:35 2023 -0800 CogVM source as per VMMaker.oscog-eem.3306 Add support for mirroring a frame in the CameraPlugin. Unimplemented on unix.

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[OpenSmalltalk/opensmalltalk-vm] 7fc935: Fix a regression in unbuffered modes of the win32 ...
by Eliot Miranda 27 Feb '23

27 Feb '23

Branch: refs/heads/Cog Home: https://github.com/OpenSmalltalk/opensmalltalk-vm Commit: 7fc935470cc93eefb5457348460ff27a31f16a43 https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/7fc935470cc93eefb5… Author: Eliot Miranda <eliot.miranda(a)gmail.com> Date: 2023-02-26 (Sun, 26 Feb 2023) Changed paths: M platforms/win32/plugins/CameraPlugin/winCameraOps.cpp Log Message: ----------- Fix a regression in unbuffered modes of the win32 CameraPlugin introduced in commit d51c1ac377067d3e469c111a15d85d4aaa187393 Author: Eliot Miranda <eliot.miranda(a)gmail.com> Date: Mon Feb 13 16:53:35 2023 -0800 CogVM source as per VMMaker.oscog-eem.3306 Add support for mirroring a frame in the CameraPlugin. Unimplemented on unix.

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[OpenSmalltalk/opensmalltalk-vm] 06f14e: CogVM source as per VMMaker.oscog-eem.3308
by Eliot Miranda 23 Feb '23

23 Feb '23

Branch: refs/heads/virtend Home: https://github.com/OpenSmalltalk/opensmalltalk-vm Commit: 06f14e7c3cee25876ba2b672bf144ddecb44dbfd https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/06f14e7c3cee25876b… Author: Eliot Miranda <eliot.miranda(a)gmail.com> Date: 2023-02-23 (Thu, 23 Feb 2023) Changed paths: M src/spur32.cog.lowcode/cogit.h M src/spur32.cog.lowcode/cogitARMv5.c M src/spur32.cog.lowcode/cogitIA32.c M src/spur32.cog/cogit.h M src/spur32.cog/cogitARMv5.c M src/spur32.cog/cogitIA32.c M src/spur32.sista/cogit.h M src/spur32.sista/cogitARMv5.c M src/spur32.sista/cogitIA32.c M src/spur64.cog.lowcode/cogit.h M src/spur64.cog.lowcode/cogitARMv8.c M src/spur64.cog.lowcode/cogitX64SysV.c M src/spur64.cog.lowcode/cogitX64WIN64.c M src/spur64.cog/cogit.h M src/spur64.cog/cogitARMv8.c M src/spur64.cog/cogitX64SysV.c M src/spur64.cog/cogitX64WIN64.c M src/spur64.sista/cogit.h M src/spur64.sista/cogitARMv8.c M src/spur64.sista/cogitX64SysV.c M src/spur64.sista/cogitX64WIN64.c M src/v3.cog/cogit.h M src/v3.cog/cogitARMv5.c M src/v3.cog/cogitIA32.c Log Message: ----------- CogVM source as per VMMaker.oscog-eem.3308 Oops! Fix 32-bit builds by providing the relevant null genPrimitiveHighResClock32

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[OpenSmalltalk/opensmalltalk-vm] 5cb568: CogVM source as per VMMaker.oscog-eem.3308
by Eliot Miranda 23 Feb '23

23 Feb '23

Branch: refs/heads/Cog Home: https://github.com/OpenSmalltalk/opensmalltalk-vm Commit: 5cb56813a7eb7585ccc7d7621d1cfa589eeaa523 https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/5cb56813a7eb7585cc… Author: Eliot Miranda <eliot.miranda(a)gmail.com> Date: 2023-02-23 (Thu, 23 Feb 2023) Changed paths: M src/spur32.cog.lowcode/cogit.h M src/spur32.cog.lowcode/cogitARMv5.c M src/spur32.cog.lowcode/cogitIA32.c M src/spur32.cog/cogit.h M src/spur32.cog/cogitARMv5.c M src/spur32.cog/cogitIA32.c M src/spur32.sista/cogit.h M src/spur32.sista/cogitARMv5.c M src/spur32.sista/cogitIA32.c M src/spur64.cog.lowcode/cogit.h M src/spur64.cog.lowcode/cogitARMv8.c M src/spur64.cog.lowcode/cogitX64SysV.c M src/spur64.cog.lowcode/cogitX64WIN64.c M src/spur64.cog/cogit.h M src/spur64.cog/cogitARMv8.c M src/spur64.cog/cogitX64SysV.c M src/spur64.cog/cogitX64WIN64.c M src/spur64.sista/cogit.h M src/spur64.sista/cogitARMv8.c M src/spur64.sista/cogitX64SysV.c M src/spur64.sista/cogitX64WIN64.c M src/v3.cog/cogit.h M src/v3.cog/cogitARMv5.c M src/v3.cog/cogitIA32.c Log Message: ----------- CogVM source as per VMMaker.oscog-eem.3308 Oops! Fix 32-bit builds by providing the relevant null genPrimitiveHighResClock32

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VM Maker: VMMaker.oscog-eem.3308.mcz
by commits＠source.squeak.org 23 Feb '23

23 Feb '23

Eliot Miranda uploaded a new version of VMMaker to project VM Maker: http://source.squeak.org/VMMaker/VMMaker.oscog-eem.3308.mcz ==================== Summary ==================== Name: VMMaker.oscog-eem.3308 Author: eem Time: 23 February 2023, 2:46:36.593952 pm UUID: 9a6ed9b2-78a0-4b41-81e0-6993219f3dc7 Ancestors: VMMaker.oscog-eem.3307 Oops! Fix 32-bit builds by providing the relevant null genPrimitiveHighResClock32 =============== Diff against VMMaker.oscog-eem.3307 =============== Item was added: + ----- Method: CogObjectRepresentation>>genPrimitiveHighResClock32 (in category 'primitive generators') ----- + genPrimitiveHighResClock32 + <inline: true> + "This awaits a 32-bit implementation of genAlloc64BitPositiveIntegerValue:into:scratchReg:scratchReg:..." + ^UnimplementedPrimitive! Item was removed: - ----- Method: CogObjectRepresentationFor64BitSpur>>genPrimitiveHighResClock32 (in category 'primitive generators') ----- - genPrimitiveHighResClock32 - <inline: true> - "This awaits a 32-bit implementation of genAlloc64BitPositiveIntegerValue:into:scratchReg:scratchReg:..." - ^UnimplementedPrimitive!

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[OpenSmalltalk/opensmalltalk-vm] bc49ac: Oops! the ErrorCode parameter for the CameraPlugin...
by Eliot Miranda 23 Feb '23

23 Feb '23

Branch: refs/heads/virtend Home: https://github.com/OpenSmalltalk/opensmalltalk-vm Commit: bc49ac6581ea1621e9820127f6a00328c180a80b https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/bc49ac6581ea1621e9… Author: Eliot Miranda <eliot.miranda(a)gmail.com> Date: 2023-02-21 (Tue, 21 Feb 2023) Changed paths: M platforms/iOS/plugins/CameraPlugin/AVFoundationVideoGrabber.m Log Message: ----------- Oops! the ErrorCode parameter for the CameraPlugin is not needed/should not be implemented (on macos). Commit: 885b07470d762993a290888eabc847354eb16289 https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/885b07470d762993a2… Author: Eliot Miranda <eliot.miranda(a)gmail.com> Date: 2023-02-22 (Wed, 22 Feb 2023) Changed paths: M src/plugins/UnixOSProcessPlugin/UnixOSProcessPlugin.c M src/spur32.cog.lowcode/cogit.h M src/spur32.cog.lowcode/cogitARMv5.c M src/spur32.cog.lowcode/cogitIA32.c M src/spur32.cog.lowcode/cointerp.c M src/spur32.cog.lowcode/cointerp.h M src/spur32.cog.lowcode/gcc3x-cointerp.c M src/spur32.cog/cogit.h M src/spur32.cog/cogitARMv5.c M src/spur32.cog/cogitIA32.c M src/spur32.cog/cointerp.c M src/spur32.cog/cointerp.h M src/spur32.cog/cointerpmt.c M src/spur32.cog/cointerpmt.h M src/spur32.cog/gcc3x-cointerp.c M src/spur32.cog/gcc3x-cointerpmt.c M src/spur32.sista/cogit.h M src/spur32.sista/cogitARMv5.c M src/spur32.sista/cogitIA32.c M src/spur32.sista/cointerp.c M src/spur32.sista/cointerp.h M src/spur32.sista/gcc3x-cointerp.c M src/spur32.stack.lowcode/gcc3x-interp.c M src/spur32.stack.lowcode/interp.c M src/spur32.stack/gcc3x-interp.c M src/spur32.stack/interp.c M src/spur32.stack/validImage.c M src/spur64.cog.lowcode/cogit.h M src/spur64.cog.lowcode/cogitARMv8.c M src/spur64.cog.lowcode/cogitX64SysV.c M src/spur64.cog.lowcode/cogitX64WIN64.c M src/spur64.cog.lowcode/cointerp.c M src/spur64.cog.lowcode/cointerp.h M src/spur64.cog.lowcode/gcc3x-cointerp.c M src/spur64.cog/cogit.h M src/spur64.cog/cogitARMv8.c M src/spur64.cog/cogitX64SysV.c M src/spur64.cog/cogitX64WIN64.c M src/spur64.cog/cointerp.c M src/spur64.cog/cointerp.h M src/spur64.cog/cointerpmt.c M src/spur64.cog/cointerpmt.h M src/spur64.cog/gcc3x-cointerp.c M src/spur64.cog/gcc3x-cointerpmt.c M src/spur64.sista/cogit.h M src/spur64.sista/cogitARMv8.c M src/spur64.sista/cogitX64SysV.c M src/spur64.sista/cogitX64WIN64.c M src/spur64.sista/cointerp.c M src/spur64.sista/cointerp.h M src/spur64.sista/gcc3x-cointerp.c M src/spur64.stack.lowcode/gcc3x-interp.c M src/spur64.stack.lowcode/interp.c M src/spur64.stack/gcc3x-interp.c M src/spur64.stack/interp.c M src/spur64.stack/validImage.c M src/v3.cog/cogit.h M src/v3.cog/cogitARMv5.c M src/v3.cog/cogitIA32.c M src/v3.cog/cointerp.c M src/v3.cog/cointerp.h M src/v3.cog/gcc3x-cointerp.c M src/v3.stack/gcc3x-interp.c M src/v3.stack/interp.c Log Message: ----------- CogVM source as per VMMaker.oscog-eem.3307/VMConstruction-Plugins-OSProcessPlugin.oscog-eem.76 Implement a machine code primitive for primitiveHighResClock on 64-bit platforms. This is faster than the fast-call interpreter primitive by 15% on x86_64 and by 480% on ARMv8 (Apple M1). Have compilePrimitive use methodOrBlockNumArgs rather than argumentCountOf: methodObj. Fix the type of semaIndices. This should be int. unsigned char risks corruption if there are more than 256 external semaphores, which could be the case in a very complex application. Fix a few sends of stackIntegerValue: that were not followed by the obligatory interpreterProxy failed check. I lost patience/time, but this really should be done. In all VMs, proceeding after a primitive has failed without checking for primitive failure can have disastrous effects (arguments are popped off the stack that shouldn't be). Compare: https://github.com/OpenSmalltalk/opensmalltalk-vm/compare/9ac04b3eab5d...88…

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[OpenSmalltalk/opensmalltalk-vm] 75b01d: CogVM source as per VMMaker.oscog-eem.3307/VMConst...
by Eliot Miranda 23 Feb '23

23 Feb '23

Branch: refs/heads/Cog Home: https://github.com/OpenSmalltalk/opensmalltalk-vm Commit: 75b01dac3ee745bab2867f1c56fb2790d57ceee2 https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/75b01dac3ee745bab2… Author: Eliot Miranda <eliot.miranda(a)gmail.com> Date: 2023-02-22 (Wed, 22 Feb 2023) Changed paths: M src/plugins/UnixOSProcessPlugin/UnixOSProcessPlugin.c M src/spur32.cog.lowcode/cogit.h M src/spur32.cog.lowcode/cogitARMv5.c M src/spur32.cog.lowcode/cogitIA32.c M src/spur32.cog.lowcode/cointerp.c M src/spur32.cog.lowcode/cointerp.h M src/spur32.cog.lowcode/gcc3x-cointerp.c M src/spur32.cog/cogit.h M src/spur32.cog/cogitARMv5.c M src/spur32.cog/cogitIA32.c M src/spur32.cog/cointerp.c M src/spur32.cog/cointerp.h M src/spur32.cog/cointerpmt.c M src/spur32.cog/cointerpmt.h M src/spur32.cog/gcc3x-cointerp.c M src/spur32.cog/gcc3x-cointerpmt.c M src/spur32.sista/cogit.h M src/spur32.sista/cogitARMv5.c M src/spur32.sista/cogitIA32.c M src/spur32.sista/cointerp.c M src/spur32.sista/cointerp.h M src/spur32.sista/gcc3x-cointerp.c M src/spur32.stack.lowcode/gcc3x-interp.c M src/spur32.stack.lowcode/interp.c M src/spur32.stack/gcc3x-interp.c M src/spur32.stack/interp.c M src/spur32.stack/validImage.c M src/spur64.cog.lowcode/cogit.h M src/spur64.cog.lowcode/cogitARMv8.c M src/spur64.cog.lowcode/cogitX64SysV.c M src/spur64.cog.lowcode/cogitX64WIN64.c M src/spur64.cog.lowcode/cointerp.c M src/spur64.cog.lowcode/cointerp.h M src/spur64.cog.lowcode/gcc3x-cointerp.c M src/spur64.cog/cogit.h M src/spur64.cog/cogitARMv8.c M src/spur64.cog/cogitX64SysV.c M src/spur64.cog/cogitX64WIN64.c M src/spur64.cog/cointerp.c M src/spur64.cog/cointerp.h M src/spur64.cog/cointerpmt.c M src/spur64.cog/cointerpmt.h M src/spur64.cog/gcc3x-cointerp.c M src/spur64.cog/gcc3x-cointerpmt.c M src/spur64.sista/cogit.h M src/spur64.sista/cogitARMv8.c M src/spur64.sista/cogitX64SysV.c M src/spur64.sista/cogitX64WIN64.c M src/spur64.sista/cointerp.c M src/spur64.sista/cointerp.h M src/spur64.sista/gcc3x-cointerp.c M src/spur64.stack.lowcode/gcc3x-interp.c M src/spur64.stack.lowcode/interp.c M src/spur64.stack/gcc3x-interp.c M src/spur64.stack/interp.c M src/spur64.stack/validImage.c M src/v3.cog/cogit.h M src/v3.cog/cogitARMv5.c M src/v3.cog/cogitIA32.c M src/v3.cog/cointerp.c M src/v3.cog/cointerp.h M src/v3.cog/gcc3x-cointerp.c M src/v3.stack/gcc3x-interp.c M src/v3.stack/interp.c Log Message: ----------- CogVM source as per VMMaker.oscog-eem.3307/VMConstruction-Plugins-OSProcessPlugin.oscog-eem.76 Implement a machine code primitive for primitiveHighResClock on 64-bit platforms. This is faster than the fast-call interpreter primitive by 15% on x86_64 and by 480% on ARMv8 (Apple M1). Have compilePrimitive use methodOrBlockNumArgs rather than argumentCountOf: methodObj. Fix the type of semaIndices. This should be int. unsigned char risks corruption if there are more than 256 external semaphores, which could be the case in a very complex application. Fix a few sends of stackIntegerValue: that were not followed by the obligatory interpreterProxy failed check. I lost patience/time, but this really should be done. In all VMs, proceeding after a primitive has failed without checking for primitive failure can have disastrous effects (arguments are popped off the stack that shouldn't be).

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Vm-dev February 2023