| So the general idea with FMA3 is that it's designed to have enough degrees of | |
| freedom so you can just have a more general FMA4 op in the IR and pick the right | |
| FMA3 op *very* late (ideally, after register allocation!). | |
| The generalized FMA op looks like this: | |
| dst = FMA ±src0, ±src1, ±src2 | |
| where at most one of the src's can be a memory operand. This computes | |
| (±src0 * ±src1) ± src2. The two signs for src0 and src1 combine |
This is mainly a notes dump and should be used for reference. This guide assumes:
Limitations of the qemu-system-aarch64 emulator on x86 include only being able to emulate one CPU and no KVM support.
| # Poker II Firmware disassembly help tool. | |
| original = IO.read("./Poker II original firmware.bin") | |
| extracted = "" | |
| original.each_byte{|b| | |
| m = (((b & 0x0f) << 4) | ((b & 0xf0) >> 4)) ^ 0xff | |
| extracted << m.chr | |
| } | |
| puts extracted |
| // Mini memory editor for Dear ImGui (to embed in your game/tools) | |
| // Animated GIF: https://twitter.com/ocornut/status/894242704317530112 | |
| // THE MEMORY EDITOR CODE HAS MOVED TO GIT: | |
| // https://github.com/ocornut/imgui_club/tree/master/imgui_memory_editor | |
| // Click "Revisions" on the Gist to see old version. |
There is sometimes a situation in which one needs to get the relative offset of a structure field, common examples of this include serialization frameworks which aid to serialize objects, vertex attributes for rendering (D3D, GL.), etc.
The most common technique for getting this information is through the offsetof
macro defined in stddef.h. Unfortunately using the macro in C++ comes with a
new set of restrictions that prevent some (subjectively valid) uses of it.
| #include <stdio.h> | |
| // #define CLANG_EXTENSION | |
| // Clang compile with -O3 | |
| #define VS_EXTENSION | |
| // https://godbolt.org/z/sVWrF4 | |
| // Clang compile with -O3 -fms-compatibility | |
| // VS2017 compile with /O3 |
| from data1 import data1 | |
| from data2 import data2 | |
| from data3 import data3 | |
| from data4 import data4 | |
| from data500 import data500 | |
| from data600 import data600 | |
| from data610 import data610 | |
| from data700 import data700 | |
| all_data = (data1, data2, data3, data4, data500, data600, data610, data700) |
| #!python | |
| # coding=utf-8 | |
| # Get ids.txt from https://github.com/cjkvi/cjkvi-ids/ and place it next to this script | |
| # ~requires python 3.6 or newer on windows~ | |
| # note: depends on the accuracy of ids.txt. for some characters, like 祭, it's pretty bad. | |
| # see also: http://www.chise.org/ids-find | |
| contains = {} |
| # Polyrhythmic Prime Discovery | |
| # by Leonard Ritter <[email protected]> | |
| primes = [] | |
| phases = [] | |
| counter = 2 | |
| def is_any_phase_zero (): |
| // simplevm.c: demonstrates Hypervisor.Framework usage in Apple Silicon | |
| // Based on the work by @zhuowei | |
| // @imbushuo - Nov 2020 | |
| // To build: | |
| // Prepare the entitlement with BOTH com.apple.security.hypervisor and com.apple.vm.networking WHEN SIP IS OFF | |
| // Prepare the entitlement com.apple.security.hypervisor and NO com.apple.vm.networking WHEN SIP IS ON | |
| // ^ Per @never_released, tested on 11.0.1, idk why | |
| // clang -o simplevm -O2 -framework Hypervisor -mmacosx-version-min=11.0 simplevm.c | |
| // codesign --entitlements simplevm.entitlements --force -s - simplevm |
