c-c++ assembly inline x86-64 128-bit SIMD - brief summary

c-c++ assembly inline x86-64 128-bit SIMD - brief summary.md

C/C++ and inline assembly

• x86_64 NASM Assembly Quick Reference ("Cheat Sheet")

• Inline Assembly quick notes

• How to Use Inline Assembly Language in C Code

• Extended Asm - Assembler Instructions with C Expression Operands

128-bit stuff

• GCC's built-in 128-bit integer

• UInt128: Addition/Subtraction - code project example

SIMD

• CS3330: A quick guide to SSE/SIMD

• SSE 2 — An Overview

• SSE2 128–Bit SIMD Integer Instructions

• SSE2 Instructions

• x86/x64 SIMD Instruction List (SSE to AVX512)

• Sse2 Intrinsics

• Check SSE2 support

int check_sse2(void){
  int test;
  __asm__ ( 
    "mov $0, %%rax      \n\t"
    "cpuid              \n\t" 
    "xor %%rax, %%rax   \n\t"
    "mov %%edx, %%eax   \n\t"
    "mov %%eax, %0  \n\t"

    : "=r" (test)
  );
  if (!(test & 0x4000000))
    return -1;
  return 0;
}

other

• get stack pointer

static void* get_sp(void) {
  void* sp;
  __asm__ volatile("mov %0, sp" : "=r"(sp));
  return sp;
}