armv7 – Windows Questions

Category : armv7

arm-none-eabi-g++ produces a strange assembly in a constructor with memset on ARMv7

6th February 2021 arm, arm-none-eabi-gcc, armv7, assembly, c++

I am porting code from x86 to armv7. The code is consist of several custom libs: one of them is LibC, so I have my own implementation of memset and other similar functions. But I faced a crash on arm. class WindowFrameFake { public: WindowFrameFake(); ~WindowFrameFake() { } private: Vector<Button*> m_buttons1; Vector<Button*> m_buttons2; LG::Color m_color ..

cross-compiling for arm include extra libraries

18th November 2020 arm, armv7, c++, cross-compiling

I am cross-compiling C++ for armv7-m using arm-none-eabi tool-chain. However, I noticed that the tool chain included extra files from newlib/libc/stdlib which are not relevant to my project like fvwrite.c fvprint.c wcrtomb.c . Is there a compiler flag that can remove these extra includes and how to assure that they are irrelevant to my project ..

Is this a proper way to extract a byte from a NEON uint8x16_t vector?

27th May 2020 arm64, armv7, c++, simd

I am a beginner to NEON intrinsics, and I wanted to work with uint8x16_t and also uint8x16x4_t. While working with it I came across a situation, where I wanted to extract a byte from a uint8x16_t. Being naive to the details I accidentally began extracting bytes from it using the [] operator at runtime. But ..