examples/aarch64/examples.h

// Copyright 2015, VIXL authors
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//
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#ifndef VIXL_EXAMPLE_EXAMPLES_H_
#define VIXL_EXAMPLE_EXAMPLES_H_

#include "aarch64/macro-assembler-aarch64.h"
#include "aarch64/simulator-aarch64.h"

using namespace vixl;
using namespace vixl::aarch64;

// Generate a function with the following prototype:
//   uint64_t factorial(uint64_t n)
//
// It provides an iterative implementation of the factorial computation.
void GenerateFactorial(MacroAssembler* masm);

// Generate a function with the following prototype:
//   uint64_t factorial_rec(uint64_t n)
//
// It provides a recursive implementation of the factorial computation.
void GenerateFactorialRec(MacroAssembler* masm);

// Generate a function with the following prototype:
//   void neon_matrix_multiply(float* dst, float* mat1, float* mat2)
//
// It provides an implementation of a column-major 4x4 matrix multiplication.
void GenerateNEONMatrixMultiply(MacroAssembler* masm);

// Generate a function with the following prototype:
//   void add2_vectors(int8_t *vecA, const int8_t *vecB, unsigned size)
//
// Demonstrate how to add two vectors using NEON. The result is stored in vecA.
void GenerateAdd2Vectors(MacroAssembler* masm);

// Generate a function with the following prototype:
//   double add3_double(double x, double y, double z)
//
// This example is intended to show the calling convention with double
// floating point arguments.
void GenerateAdd3Double(MacroAssembler* masm);

// Generate a function with the following prototype:
//   double add4_double(uint64_t a, double b, uint64_t c, double d)
//
// The generated function pictures the calling convention for functions
// mixing integer and floating point arguments.
void GenerateAdd4Double(MacroAssembler* masm);

// Generate a function with the following prototype:
//   uint32_t sum_array(uint8_t* array, uint32_t size)
//
// The generated function computes the sum of all the elements in
// the given array.
void GenerateSumArray(MacroAssembler* masm);

// Generate a function with the following prototype:
//   int64_t abs(int64_t x)
//
// The generated function computes the absolute value of an integer.
void GenerateAbs(MacroAssembler* masm);

// Generate a function with the following prototype:
//   uint64_t check_bounds(uint64_t value, uint64_t low, uint64_t high)
//
// The goal of this example is to illustrate the use of conditional
// instructions. The generated function will check that the given value is
// contained within the given boundaries. It returns 1 if 'value' is between
// 'low' and 'high' (ie. low <= value <= high).
void GenerateCheckBounds(MacroAssembler* masm);

// Generate a function with the following prototype:
//   uint32_t crc32(const char *msg, size_t msg_length)
//
// The generated function computes the CRC-32 checksum on the input msg
// with specified length, and returns the result.
void GenerateCrc32(MacroAssembler* masm);

// Generate a function which uses the stack to swap the content of the x0, x1,
// x2 and x3 registers.
void GenerateSwap4(MacroAssembler* masm);

// Generate a function which swaps the content of w0 and w1.
// This example demonstrates some interesting features of VIXL's stack
// operations.
void GenerateSwapInt32(MacroAssembler* masm);

// Generate a function with the following prototype:
//   uint64_t demo_function(uint64_t x)
//
// This is the example used in doc/getting-started-aarch64.txt
void GenerateDemoFunction(MacroAssembler* masm);

// This function generates and runs code that uses literals to sum the `a` and
// `b` inputs.
int64_t LiteralExample(int64_t a, int64_t b);

// Generate a few examples of runtime calls.
void GenerateRuntimeCallExamples(MacroAssembler* masm);

#endif  // VIXL_EXAMPLE_EXAMPLES_H_