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kevintechnology.com | ||
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nullprogram.com
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www.afronski.pl
Personal blog of Wojtek Gawro?ski, a passionate software developer. |
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kristerw.github.io
GCC per default enables one optimization for x86_64 that can change the result of floating-point operations: -ffp-contract=fast.1 This allows the compiler to do floating-point expression contraction such as combining multiplication and addition instructions with an FMA instruction.2 -ffp-contract=fast is enabled for C++ and GNU C. It is not enabled for standard C (that is, when compiling with -std=c99, etc.).? The FMA instruction omits the rounding done in the multiplication instruction, making the calculations produce different results for some input values.? |
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0x44.cc
[AI summary] The article provides an in-depth explanation of reverse engineering concepts, including CPU operations, memory representation, data structures, and disassembly techniques. It guides readers through understanding machine code, endianness, signed integers, and how to analyze C code using tools like Visual Studio and disassemblers. |
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