https://github.com/fujitsu/xbyak_aarch64

aarch jit-assembler sve xbyak
Last synced: 5 months ago
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Host: GitHub
URL: https://github.com/fujitsu/xbyak_aarch64
Owner: fujitsu
License: apache-2.0
Created: 2019-12-09T08:28:23.000Z (over 6 years ago)
Default Branch: main
Last Pushed: 2025-04-05T04:01:05.000Z (about 1 year ago)
Last Synced: 2025-04-05T05:18:28.435Z (about 1 year ago)
Topics: aarch, jit-assembler, sve, xbyak
Language: C++
Size: 2.03 MB
Stars: 199
Watchers: 24
Forks: 41
Open Issues: 9
Metadata Files:
- Readme: README.md
- License: LICENSE
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README

          [![Build Status](https://travis-ci.org/herumi/xbyak_aarch64.png)](https://travis-ci.org/herumi/xbyak_aarch64)

# Xbyak_aarch64 ; JIT assembler for AArch64 CPUs by C++

## Abstract

Xbyak_aarch64 is a C++ library which enables run-time assemble coding with the AArch64 instruction set of Arm(R)v8-A architecture.

Xbyak_aarch64 is based on Xbyak developed for x86_64 CPUs by MITSUNARI Shigeo.

## Feature

* GNU assembler like syntax.

* Fully support SVE instructions.

### Requirement

Xbyak_aarch64 uses no external library and it is written as standard C++ files

so that we believe Xbyak_aarch64 works various environment with various compilers.

### News

Break backward compatibility:

- To link `libxbyak_aarch64.a` is always necessary.

- namespace `Xbyak` is renamed to `Xbyak_aarch64`.

- Some class are renamed (e.g. CodeGeneratorAArch64 -> CodeGenerator).

- L_aarch64() is renamed to L().

- use dd(uint32_t) instead of dw(uint32_t).

### Supported Compilers

Almost C++11 or later compilers for AArch64 such as g++, clang++.

## Install

The command `make` builds `lib/libxbyak_aarch64.a`.

`make install` installs headers and a library into `/usr/local/` (default path).

Or add the location of the `xbyak_aarch64` directory to your compiler's include and link paths.

### Execution environment

You can execute programs using xbyak_aarch64 on systems running on Arm(R)v8-A architecure CPUs.

Even if you can't access such systems, you can try Xbyak_aarch64 on QEMU (generic and open source machine emulator and virtualizer).

We have checked programs built with xbyak_aarch64 can be executed with qemu version 3.1.0 on Linux running on x86_64 CPUs.

The following dpkgs are required.

* binutils-aarch64-linux-gnu

* cpp-8-aarch64-linux-gnu

* cpp-aarch64-linux-gnu

* g++-8-aarch64-linux-gnu

* g++-aarch64-linux-gnu

* gcc-8-aarch64-linux-gnu

* gcc-8-aarch64-linux-gnu-base:amd64

* gcc-aarch64-linux-gnu

* pkg-config-aarch64-linux-gnu

* qemu

* qemu-block-extra:amd64

* qemu-system-arm

* qemu-system-common

* qemu-system-data

* qemu-system-gui

* qemu-user

* qemu-user-static

* qemu-utils

Then execute the following commands.

```

cd xbyak_aarch64/sample

aarch64-linux-gnu-g++ add.cpp

env QEMU_LD_PREFIX=/usr/aarch64-linux-gnu qemu-aarch64 ./a.out

```

On Fedora linux use

```

sudo dnf install qemu qemu-user qemu-system-aarch64 qemu-user-static-aarch64

make clean

CXX=aarch64-redhat-linux-g++ make

cd sample

CXX=aarch64-redhat-linux-g++ make

aarch64-redhat-linux-g++ add.cpp -I ../ -L../lib/libxbyak_aarch64.a

```

## M1 mac

For test, aarch64-gas is necessary.

Make the binary from [GNU-A Downloads](https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a/downloads) or use [aarch64-unknown-linux-gnu](https://github.com/thinkski/osx-arm-linux-toolchains).

## How to make lib

```

make

```

makes `lib/libxbyak_aarch64.a`.

## How to use cmake

on Windows ARM64

```

mkdir build

cd build

cmake .. -A arm64

msbuild xbyak_aarch64.sln /p:Configuration=Release

```

## How to use Xbyak_aarch64

Inherit `Xbyak::CodeGenerator` class and make the class method.

Make an instance of the class and get the function

pointer by calling `getCode()` and call it.

The following example 1) generates a JIT-ed function which simply adds two integer values passed as arguments and returns an integer value as a result,

and 2) calls the function. This example outputs "7" to STDOUT.

compile options:

- `-I /xbyak_aarch64`.

- `-L /lib -lxbyak_aarch64`.

```

#include "xbyak_aarch64.h"

using namespace Xbyak_aarch64;

class Generator : public CodeGenerator {

public:

  Generator() {

    Label L1, L2;

    L(L1);

    add(w0, w1, w0);

    cmp(w0, 13);

    b(EQ, L2);

    sub(w1, w1, 1);

    b(L1);

    L(L2);

    ret();

  }

};

int main() {

  Generator gen;

  gen.ready();

  auto f = gen.getCode();

  std::cout << f(3, 4) << std::endl;

  return 0;

}

```

## Syntax

Synatx is similar to "AS" (GNU assembler).

Each AArch64 instruction is correspond to each function written in "xbyak_aarch64_mnemonic.h", we call it a **mnemonic function**.

Please refer files in sample/mnemonic_syntax directory for usage of mnemonic functions.

The below example shows correspondence between "AS" syntax and Xbyak_aarch64 mnemonic functions.

```

"AS"                  Xbyak_aarch64

add w0, w0, w1  --> add(w0, w0, w1);

add x0, x0, x1  --> add(x0, x0, x1);

add x0, x0, 5   --> add(x0, x0, 5);

mov w0, 1       --> mov(w0, 1);

ret             --> ret();

```

### Mnemonic functions

Each **mnemonic function** corresponds to one AArch64 instruction.

Function name represents corresponding mnemonic of instruction.

Because **"and", "or", "not"** are reserved keywords C++ and **"."** can't be used in C++ function name,

the following special cases are exist.

|Mnemonic of instruction|Name of **mnemonic funciton**|

|----|----|

|and|and_|

|or|or_|

|not|not_|

|b.cond|b|

### Operand

This section explains operands, which are given to mnemonic functions as their arguments.

#### General purpose registers

As general purpose registers,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

|Instance name|C++ class name|Remarks|

|----|----|----|

|w0, w1, ..., w30|WReg|32-bit general purpose registers|

|x0, x1, ..., x30|WReg|64-bit general purpose registers|

|wzr|WReg|32-bit zero register|

|xzr|XReg|64-bit zero register|

|wsp|WReg|32-bit stack pointer|

|sp|zXReg|64-bit stack pointer|

You can also use your original instance as mnemonic functions argumetns.

Please refer constructor of "C++ class name" in Xbyak_aarch64 files.

```

WReg dstReg(0);

WReg srcReg0(1);

WReg srcReg1(2);

add(dstReg, srcReg0, srcReg1);  <--- (1)

add(w0, w1, w2);                <--- Output is same JIT code of (1)

```

##### SIMD/Floating point registers as scalar registers

As SIMD/Floating point registers with scalar use,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

|Instance name|C++ class name|Remarks|

|----|----|----|

|b0, b1, ..., b31|BReg|8-bit scalar registers|

|h0, h1, ..., h31|HReg|16-bit scalar registers|

|s0, s1, ..., s31|SReg|32-bit scalar registers|

|d0, d1, ..., d31|DReg|64-bit scalar registers|

|q0, q1, ..., q31|QReg|128-bit scalar registers|

You can also use your original instance as mnemonic functions argumetns.

Please refer constructor of "C++ class name" in Xbyak_aarch64 files.

```

BReg dstReg(0);

mov(b0, v0.b[5]);       <--- (1)

mov(dstReg, v0.b[5]);   <--- Output is same JIT code of (1)

```

#### SIMD/Floating point registers as vector registers

As SIMD/Floating point registers with vector use,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

|Instance name|C++ class name|Remarks|

|----|----|----|

|v0.b8, v1.b8, ..., v31.b8|VReg8B|8-bit x8 elements vector registers|

|v0.b16, v1.b16, ..., v31.b16|VReg16B|8-bit x16 elements vector registers|

|v0.h4, v1.h4, ..., v31.h4|VReg4H|16-bit x4 elements vector registers|

|v0.h8, v1.h8, ..., v31.h8|VReg8H|16-bit x8 elements vector registers|

|v0.s2, v1.s2, ..., v31.s2|VReg2S|32-bit x2 elements vector registers|

|v0.s4, v1.s4, ..., v31.s4|VReg4S|32-bit x4 elements vector registers|

|v0.d1, v1.d1, ..., v31.d1|VReg1D|64-bit x1 elements vector registers|

|v0.d2, v1.d2, ..., v31.d2|VReg2D|64-bit x2 elements vector registers|

You can also use your original instance as mnemonic functions argumetns.

Please refer constructor of "C++ class name" in Xbyak_aarch64 files.

```

VReg16B dstReg(0);

VReg16B srcReg(1);

mov(v0.b16, v1.b16);   <--- (1)

mov(dstReg, srcReg);   <--- Output is same JIT code of (1)

```

#### Element of SIMD/Floating point registers

As SIMD/Floating point registers with element-wise use,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

|Instance name|C++ class name|Remarks|

|----|----|----|

|v0.b[0], v0.b[1], ..., v0.b[15]|VRegBElem|8-bit element of vector register #0|

|vN.b[0], vN.b[1], ..., vN.b[15]|VRegBElem|8-bit element of vector register #N|

|v0.h[0], v0.h[1], ..., v0.h[15]|VRegHElem|16-bit element of vector register #0|

|vN.h[0], vN.h[1], ..., vN.h[15]|VRegHElem|16-bit element of vector register #N|

|v0.s[0], v0.s[1], ..., v0.s[15]|VRegSElem|32-bit element of vector register #0|

|vN.s[0], vN.s[1], ..., vN.s[15]|VRegSElem|32-bit element of vector register #N|

|v0.d[0], v0.d[1], ..., v0.d[15]|VRegDElem|64-bit element of vector register #0|

|vN.d[0], vN.d[1], ..., vN.d[15]|VRegDElem|64-bit element of vector register #N|

You can also use your original instance as mnemonic functions argumetns.

Please refer constructor of "C++ class name" in Xbyak_aarch64 files.

```

VRegBElem dstReg(0, 3, 16);

VRegBElem srcReg(1, 4, 16);

VRegB     hoge(0);

mov(v0.b[3], v1.b[4]); <--- (1)

mov(dstReg,  srcReg);  <--- Output is same JIT code of (1)

mov(hoge[3], srcReg);  <--- Output is same JIT code of (1)

```

### SIMD/Floating point register lists

As SIMD/Floating point register lists,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

Register index can be cyclic.

|Instance name|C++ class name|Remarks|

|----|----|----|

|v0.b16 - v0.b16|VReg16BList|SIMD/Floating point register list containing 8-bit elements x 16 x 1|

|v0.b16 - v1.b16|VReg16BList|SIMD/Floating point register list containing 8-bit elements x 16 x 2|

|v0.b16 - v2.b16|VReg16BList|SIMD/Floating point register list containing 8-bit elements x 16 x 3|

|v0.b16 - v3.b16|VReg16BList|SIMD/Floating point register list containing 8-bit elements x 16 x 4|

|v31.b16 - v2.b16|VReg16BList|SIMD/Floating point register list containing 8-bit elements x 16 x 4|

|v0.h8 - v3.h8|VReg8HList|SIMD/Floating point register list containing 16-bit elements x 8 x 4|

|v0.s4 - v3.s4|VReg4SList|SIMD/Floating point register list containing 32-bit elements x 4 x 4|

|v0.d2 - v3.d2|VReg2DList|SIMD/Floating point register list containing 64-bit elements x 2 x 4|

You can also use your original instance as mnemonic functions arguments.

Please refer constructor of "C++ class name" in Xbyak_aarch64 files.

```

VReg16BList dstList(v0.b16, v3.b16);

VReg16BList hoge(VReg16B(0), VReg16B(3));

ld4((v0.b16 - v3.b16), ptr(x0)); <--- (1)

ld4(dstLsit, ptr(x0));   <--- Output is same JIT code of (1)

ld4(hoge, ptr(x0));      <--- Output is same JIT code of (1)

```

### Element of vector register lists

As elements of SIMD/Floating point register lists,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

|Instance name|C++ class name|Remarks|

|----|----|----|

|(v0.b16 - v0.b16)[0]|VRegBElem|First 8-bit element of one-vector-register list|

|(v0.b16 - v0.b16)[N]|VRegBElem|N-th 8-bit element of one-vector-register list|

|(v0.b16 - v3.b16)[N]|VRegBElem|N-th 8-bit element of four-vector-register list|

|(v0.h8 - v3.h8)[N]|VRegHElem|N-th 16-bit element of four-vector-register list|

|(v0.s4 - v3.s4)[N]|VRegSElem|N-th 32-bit element of four-vector-register list|

|(v0.d2 - v3.d2)[N]|VRegDElem|N-th 64-bit element of four-vector-register list|

You can also use your original instance as mnemonic functions argumetns.

Please refer constructor of "C++ class name" in Xbyak_aarch64 files.

```

VRegBElem dstReg(0, 3, 16);

VRegBElem hoge((VReg16B(0) - VReg16B(3))[3]);

ld4((v0.b16 - v3.b16)[3], ptr(x0)); <--- (1)

ld4(dstReg, ptr(x0));       <--- Output is same JIT code of (1)

ld4(hoge, ptr(x0));         <--- Output is same JIT code of (1)

```

### SVE registers as vector registers

AS SVE registers,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

|Instance name|C++ class name|Remarks|

|----|----|----|

|Z0.b, z1.b, ..., z31.b|ZRegB|8-bit x 64 elements SVE registers.|

|Z0.h, z1.h, ..., z31.h|ZRegB|16-bit x 32 elements SVE registers.|

|Z0.s, z1.s, ..., z31.s|ZRegB|32-bit x 16 elements SVE registers.|

|Z0.d, z1.d, ..., z31.d|ZRegB|64-bit x 8 elements SVE registers.|

|Z0.q, z1.q, ..., z31.q|ZRegB|128-bit x 4 elements SVE registers.|

You can also use your original instance as mnemonic functions argumetns.

Please refer constructor of "C++ class name" in Xbyak_aarch64 files.

```

ZRegB dstReg(0);

add(z0.b, z1.b, z2.b);      <--- (1)

add(ZRegB(0), z1.b, z2.b);  <--- Output is same JIT code of (1)

add(dstReg, z1.b, z2.b);    <--- Output is same JIT code of (1)

```

### Element of SVE registers

As SVE registers with element-wise use,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

|Instance name|C++ class name|Remarks|

|----|----|----|

|z0.b[0], z0.b[1], ..., z0.b[15]|ZRegBElem|8-bit element of SVE register #0|

|vN.b[0], vN.b[1], ..., vN.b[15]|ZRegBElem|8-bit element of SVE register #N|

|z0.h[0], z0.h[1], ..., z0.h[15]|ZRegHElem|16-bit element of SVE register #0|

|vN.h[0], vN.h[1], ..., vN.h[15]|ZRegHElem|16-bit element of SVE register #N|

|z0.s[0], z0.s[1], ..., z0.s[15]|ZRegSElem|32-bit element of SVE register #0|

|vN.s[0], vN.s[1], ..., vN.s[15]|ZRegSElem|32-bit element of SVE register #N|

|z0.d[0], z0.d[1], ..., z0.d[15]|ZRegDElem|64-bit element of SVE register #0|

|vN.d[0], vN.d[1], ..., vN.d[15]|ZRegDElem|64-bit element of SVE register #N|

|z0.q[0], z0.q[1], ..., z0.q[15]|ZRegDElem|128-bit element of SVE register #0|

|vN.q[0], vN.q[1], ..., vN.q[15]|ZRegDElem|128-bit element of SVE register #N|

You can also use your original instance as mnemonic functions argumetns.

Please refer constructor of "C++ class name" in Xbyak_aarch64 files.

```

ZRegBElem hoge(1, 7, 8);

dup(z0.b, z1.b[7]);  <--- (1)

add(z0.b, hoge);     <--- Output is same JIT code of (1)

```

### SVE register lists

As SVE register lists,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

Register index can be cyclic.

|Instance name|C++ class name|Remarks|

|----|----|----|

|z0.b - z0.b|ZRegBList|SVE register list containing 8-bit elements x 64 x 1|

|z0.b - z1.b|ZRegBList|SVE register list containing 8-bit elements x 64 x 2|

|z0.b - z2.b|ZRegBList|SVE register list containing 8-bit elements x 64 x 3|

|z0.b - z3.b|ZRegBList|SVE register list containing 8-bit elements x 64 x 4|

|z31.b - z2.b|ZRegBList|SVE register list containing 8-bit elements x 64 x 4|

|z0.h - z3.h|ZRegHList|SVE register list containing 16-bit elements x 32 x 4|

|z0.s - z3.s|ZRegSList|SVE register list containing 32-bit elements x 16 x 4|

|z0.d - z3.d|ZRegDList|SVE register list containing 64-bit elements x 8 x 4|

|z0.q - z3.q|ZRegQList|SVE register list containing 128-bit elements x 4 x 4|

```

ZRegBList dstList(z0.b, z3.b);

ZRegBList hoge(ZRegB(0) - ZRegB(3));

ld4((z0.b - z3.b), p0, ptr(x0)); <--- (1)

ld4(dstList, p0, ptr(x0));       <--- Output is same JIT code of (1)

ld4(hoge, p0, ptr(x0));          <--- Output is same JIT code of (1)

```

### Element of SVE register lists

As elements of SVE register lists,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

|Instance name|C++ class name|Remarks|

|----|----|----|

|(z0.b - z0.b)[0]|ZRegBElem|First 8-bit elements of one-SVE-register list|

|(z0.b - z0.b)[N]|ZRegBElem|N-th 8-bit elements of one-SVE-register list|

|(z0.b - z3.b)[N]|ZRegBElem|N-th 8-bit elements of four-SVE-register list|

|(z0.h - z3.h)[N]|ZRegHElem|N-th 16-bit elements of four-SVE-register list|

|(z0.s - z3.s)[N]|ZRegSElem|N-th 32-bit elements of four-SVE-register list|

|(z0.d - z3.d)[N]|ZRegDElem|N-th 64-bit elements of four-SVE-register list|

You can also use your original instance as mnemonic functions argumetns analogous with the element of vector register lists.

### Predicate registers

As predicate registers,

the following table shows example of mnemonic functions' arguments ("Instance name" column).

|Instance name|C++ class name|Remarks|

|----|----|----|

|p0, p1, ..., p7|PReg|Predicate registers|

|p0.b, p1.b, ..., p7.b|PRegB|Predicate registers for 8-bit elements|

|p0.h, p1.h, ..., p7.h|PRegH|Predicate registers for 16-bit elements|

|p0.s, p1.s, ..., p7.s|PRegS|Predicate registers for 32-bit elements|

|p0.d, p1.d, ..., p7.d|PRegD|Predicate registers for 64-bit elements|

Though Xbyak_aarch64 defines PRegB, PRegH, PRegS, PRegD classes,

you can use PReg class instances where mnemonic functions take predicate register operands.

The AArch64 instructin set has two predication types, "merging" and "zeroing" predicate.

You can use "T_m" or "T_z" to inform mnemonic functions which type you choses ((1), (2)).

You can ommit "T_m" and "T_z" for mnemonic functions whose correspond predicate instructions

can take either one. For example, "CLS" instruction in the AARch64 instruction set is only defined for merging predicate,

both (3) and (4) are OK.

Some instructions are defined for both predicated and unpredicated.

Output JIT-ed code of (5) and (6) are deferent.

```

mov(z0.b, p0/T_m, 1);              <--- (1), merging predicate

mov(z0.b, p0/T_z, 1);              <--- (2), zeroing predicate

cls(z0.b, p0/T_m, z0.b);           <--- (3)

cls(z0.b, p0, z0.b);               <--- (4), output is same JIT code of (3)

add(z0.b, p0/T_m, z1.b, z2.b);     <--- (5), predicated add

add(z0.b, p0, z1.b, z2.b);         <--- (6), output is same JIT code of (5)

add(z0.b, z1.b, z2.b);             <--- (7), unpredicated add, output is NOT same JIT code of (5)

```

You can also use your original instance as mnemonic functions argumetns.

Please refer constructor of "C++ class name" in Xbyak_aarch64 files.

```

PReg hoge(0);

add(z0.b, p0, z1.b, z2.b);         <--- (8)

add(z0.b, PReg(0), z1.b, z2.b);    <--- Output is same JIT code of (8)

add(z0.b, hoge, z1.b, z2.b);       <--- Output is same JIT code of (8)

```

### Immediate values

You can use immediate values for arguments of mnemonic functions in the form that C++ syntax allows,

such as, "10", "-128", "0xFF", "1<<32", "3.5", etc.

Please care for range of values.

For example, "ADD (immediate)" instruction can receive signed 12-bit value

so that you have to ensure that the value passed to mnemonic function is inside the range.

Mnemonic functions of Xbyak_aarch64 checks immediate values at runtime,

and throws exception if it detects range over.

```

void genAddFunc() {

     int a = 1<<16;

     add(x0, x0, a);    <--- This mnemonic function throws exception at runtime.

     ret();

}

```

Some immediate values may not decided at coding time but runtime.

You should check the immediate values and handle them.

```

void gen_Summation_From_One_To_Parameter_Func(unsigned int N) {

    if(N < (1<<11)) {

        for(int i=0; i()());

}

```

**Note**: See [sample/test0.cpp](sample/test0.cpp).

### AutoGrow

If `AutoGrow` is specified in a constructor of `CodeGenerator`,

the memory region for JIT-ed code is automatically extended if needed.

Call `ready()` or `readyRE()` before calling `getCode()` to fix jump address.

```

struct Code : Xbyak_aarch64::CodeGenerator {

  Code()

    : Xbyak_aarch64::CodeGenerator(, Xbyak_aarch64::AutoGrow)

  {

     ...

  }

};

Code c;

// generate code for jit

c.ready(); // mode = Read/Write/Exec

```

**Note**:

* Don't use the address returned by `getCurr()` before calling `ready()` because it may be invalid address.

### Read/Exec mode

Xbyak_aarch64 set Read/Write/Exec mode to memory to run JIT-ed code.

If you want to use Read/Exec mode for security, then specify `DontSetProtectRWE` for `CodeGenerator` and

call `setProtectModeRE()` after generating JIT-ed code.

```

struct Code : Xbyak_aarch64::CodeGenerator {

    Code()

        : Xbyak_aarch64::CodeGenerator(4096, Xbyak_aarch64::DontSetProtectRWE)

    {

        mov(eax, 123);

        ret();

    }

};

Code c;

c.setProtectModeRE();

```

Call `readyRE()` instead of `ready()` when using `AutoGrow` mode.

## How to pass arguments to JIT generated function

To be written...

## Macro

To be written...

## Sample

To be written...

* [add.cpp](sample/add.cpp) ; tiny sample

* [label.cpp](sample/label.cpp) ; label sample

## License

Copyright FUJITSU LIMITED 2019-2020

Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

## Reference

- Chapter C6:A64 Base Instruction Descriptions and C7:A64 Advanced SIMD and Floating-point Instruction Descriptions of "ARM(R) Architecture Reference Manual ARMv8, for ARMv8-A architecture profile", ARM DDI 0487D.b (ID042519)".

- "ARM(R) Architecture Reference Manual Supplement, The Scalable Vector Extension (SVE), for ARMv8-A", ARM DDI0584.

- "Procedure Call Standard for the ARM 64-bit Architecture (AArch64)",  ARM IHI 0055B".

- [Xbyak_aarch64; Just-In-Time Assembler for Armv8-A and Scalable Vector Extension](https://connect.linaro.org/resources/lvc21/lvc21-203/)

- [Development of Deep Learning Library for AArch64 CPU](https://connect.linaro.org/resources/lvc21f/lvc21f-212/)

- [A Binary Translator to Accelerate Development of Deep Learning Processing Library for AArch64 CPU](https://search.ieice.org/bin/pdf_advpub.php?category=C&lang=E&fname=2021LHP0001&abst=)

## Notice

* Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

* Intel is a registered trademark of Intel Corporation (or its subsidiaries) in the US and/or elsewhere.

## Acknowledgement

We are grateful to MITSUNARI-san (Cybozu Labs, Inc.) for release Xbyak as an open source software and his advice for development of Xbyak_aarch64.

## History

|Date|Version|Remarks|

|----|----|----|

|December 9, 2019|0.9.0|First public release version.|

## Copyright

Copyright FUJITSU LIMITED 2019-2020
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