ylfeng/ReF-Decompile-dataset huggingface dataset:
user: 下面的汇编指令对应的C源代码是什么:

```asm
<print_usage>:
  endbr64
  push   %rbx
  mov    %rdi,%rbx
  lea    D1(%rip),%rdi
  call   <puts@plt>
  mov    %rbx,%rsi
  lea    D6(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D29(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%edi
  call   <exit@plt>
  pop    %rbx
  ret
```

tool_calls: name: read_data
arguments: data_tag: D1
type: string
name: read_data
arguments: data_tag: D6
type: string
name: read_data
arguments: data_tag: D29
type: string

tool: D1: 

pressure - Read and print air pressure and temperature from BMP085 via I2C.


tool: D6: Usage: %s [-aAdtTpm]


tool: D29:   -a --address		 sets the I2C bus address of the BMP085 sensor;
  -A --altitude		 calcluate and print the altitude;
  -d --device		 set the I2C device (defualt is /dev/i2c-0);
  -m --mode		 sets the measurement mode. Default value 1 = STANDARD. Allowed values:
                                            0 = ULTRA LOW POWER
                                            1 = STANDARD
                                            2 = HIGH RESOLUTION
                                            3 = ULTRA HIGH RESOLUTION
  -p --pressure		 measure the atmospheric pressure and print the value;
  -t --table		 print callibration table;
  -T --temperature	 measure temperature and print the value in C;


assistant: ```c
void print_usage(const char *prog) {
  printf("\n\npressure - Read and print air pressure and temperature from BMP085 via I2C.\n\n");
  printf("Usage: %s [-aAdtTpm]\n", prog);
  puts("  -a --address\t\t sets the I2C bus address of the BMP085 sensor;\n"
       "  -A --altitude\t\t calcluate and print the altitude;\n"
       "  -d --device\t\t set the I2C device (defualt is /dev/i2c-0);\n"
       "  -m --mode\t\t sets the measurement mode. Default value 1 = STANDARD. Allowed values:\n"
       "                                            0 = ULTRA LOW POWER\n"
       "                                            1 = STANDARD\n"
       "                                            2 = HIGH RESOLUTION\n"
       "                                            3 = ULTRA HIGH RESOLUTION\n"
       "  -p --pressure\t\t measure the atmospheric pressure and print the value;\n"
       "  -t --table\t\t print callibration table;\n"
       "  -T --temperature\t measure temperature and print the value in C;\n");
  exit(1);
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<print_usage>:
  endbr64
  push   %rbp
  mov    %rdi,%rbp
  lea    D15(%rip),%rdi
  call   <puts@plt>
  mov    %rbp,%rsi
  lea    D16(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  lea    D14(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%edi
  pop    %rbp
  jmp    1090 <exit@plt>
```

tool_calls: name: read_data
arguments: tag: D15
type_guessed: string
name: read_data
arguments: tag: D16
type_guessed: string
name: read_data
arguments: tag: D14
type_guessed: string

tool: D15: 

pressure - Read and print air pressure and temperature from BMP085 via I2C.


tool: D16: Usage: %s [-aAdtTpm]


tool: D14:   -a --address		 sets the I2C bus address of the BMP085 sensor;
  -A --altitude		 calcluate and print the altitude;
  -d --device		 set the I2C device (defualt is /dev/i2c-0);
  -m --mode		 sets the measurement mode. Default value 1 = STANDARD. Allowed values:
                                            0 = ULTRA LOW POWER
                                            1 = STANDARD
                                            2 = HIGH RESOLUTION
                                            3 = ULTRA HIGH RESOLUTION
  -p --pressure		 measure the atmospheric pressure and print the value;
  -t --table		 print callibration table;
  -T --temperature	 measure temperature and print the value in C;


assistant: ```c
void print_usage(const char *prog) {
  printf("\n\npressure - Read and print air pressure and temperature from BMP085 via I2C.\n\n");
  printf("Usage: %s [-aAdtTpm]\n", prog);
  puts("  -a --address\t\t sets the I2C bus address of the BMP085 sensor;\n"
       "  -A --altitude\t\t calcluate and print the altitude;\n"
       "  -d --device\t\t set the I2C device (defualt is /dev/i2c-0);\n"
       "  -m --mode\t\t sets the measurement mode. Default value 1 = STANDARD. Allowed values:\n"
       "                                            0 = ULTRA LOW POWER\n"
       "                                            1 = STANDARD\n"
       "                                            2 = HIGH RESOLUTION\n"
       "                                            3 = ULTRA HIGH RESOLUTION\n"
       "  -p --pressure\t\t measure the atmospheric pressure and print the value;\n"
       "  -t --table\t\t print callibration table;\n"
       "  -T --temperature\t measure temperature and print the value in C;\n");
  exit(1);
}
```
user: Translate the below assembly code into C programming language:

```asm
<print_usage>:
  endbr64
  push   %rbp
  mov    %rdi,%rbp
  lea    D5(%rip),%rdi
  call   <puts@plt>
  mov    %rbp,%rsi
  lea    D21(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  lea    D29(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%edi
  pop    %rbp
  jmp    1090 <exit@plt>
```

tool_calls: name: disassemble_data
arguments: tag: D5
type_guessed: string
name: disassemble_data
arguments: tag: D21
type_guessed: string
name: disassemble_data
arguments: tag: D29
type_guessed: string

tool: D5: 

pressure - Read and print air pressure and temperature from BMP085 via I2C.


tool: D21: Usage: %s [-aAdtTpm]


tool: D29:   -a --address		 sets the I2C bus address of the BMP085 sensor;
  -A --altitude		 calcluate and print the altitude;
  -d --device		 set the I2C device (defualt is /dev/i2c-0);
  -m --mode		 sets the measurement mode. Default value 1 = STANDARD. Allowed values:
                                            0 = ULTRA LOW POWER
                                            1 = STANDARD
                                            2 = HIGH RESOLUTION
                                            3 = ULTRA HIGH RESOLUTION
  -p --pressure		 measure the atmospheric pressure and print the value;
  -t --table		 print callibration table;
  -T --temperature	 measure temperature and print the value in C;


assistant: ```c
void print_usage(const char *prog) {
  printf("\n\npressure - Read and print air pressure and temperature from BMP085 via I2C.\n\n");
  printf("Usage: %s [-aAdtTpm]\n", prog);
  puts("  -a --address\t\t sets the I2C bus address of the BMP085 sensor;\n"
       "  -A --altitude\t\t calcluate and print the altitude;\n"
       "  -d --device\t\t set the I2C device (defualt is /dev/i2c-0);\n"
       "  -m --mode\t\t sets the measurement mode. Default value 1 = STANDARD. Allowed values:\n"
       "                                            0 = ULTRA LOW POWER\n"
       "                                            1 = STANDARD\n"
       "                                            2 = HIGH RESOLUTION\n"
       "                                            3 = ULTRA HIGH RESOLUTION\n"
       "  -p --pressure\t\t measure the atmospheric pressure and print the value;\n"
       "  -t --table\t\t print callibration table;\n"
       "  -T --temperature\t measure temperature and print the value in C;\n");
  exit(1);
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<circularPermutation>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %edi,-0x24(%rbp)
  mov    %esi,-0x28(%rbp)
  mov    %rdx,-0x30(%rbp)
  mov    -0x24(%rbp),%eax
  mov    %eax,%esi
  mov    $0x2,%edi
  call   <pow@plt>
  sub    $0x1,%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x18(%rbp),%eax
  add    $0x1,%eax
  cltq
  shl    $0x2,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x18(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    -0x30(%rbp),%rax
  mov    %edx,(%rax)
  cmpl   $0x1,-0x24(%rbp)
  jne    L33
  mov    -0x10(%rbp),%rax
  mov    -0x28(%rbp),%edx
  mov    %edx,(%rax)
  mov    -0x10(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x10(%rbp),%rax
  add    $0x4,%rax
  and    $0x1,%edx
  mov    %edx,(%rax)
  mov    -0x10(%rbp),%rax
  jmp    L10
L33:
  mov    -0x28(%rbp),%edx
  mov    -0x24(%rbp),%ecx
  mov    -0x10(%rbp),%rax
  mov    %ecx,%esi
  mov    %rax,%rdi
  call   <generate@plt>
  mov    %eax,-0x14(%rbp)
  mov    -0x18(%rbp),%eax
  add    $0x1,%eax
  cltq
  shl    $0x2,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  movl   $0x0,-0x1c(%rbp)
  jmp    L9
L26:
  mov    -0x14(%rbp),%edx
  mov    -0x1c(%rbp),%eax
  add    %eax,%edx
  mov    -0x24(%rbp),%eax
  mov    $0x1,%esi
  mov    %eax,%ecx
  shl    %cl,%esi
  mov    %esi,%ecx
  mov    %edx,%eax
  cltd
  idiv   %ecx
  mov    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    -0x1c(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x8(%rbp),%rdx
  add    %rcx,%rdx
  mov    (%rax),%eax
  mov    %eax,(%rdx)
  addl   $0x1,-0x1c(%rbp)
L9:
  mov    -0x24(%rbp),%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%edx
  mov    %edx,%eax
  cmp    %eax,-0x1c(%rbp)
  jl     L26
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x8(%rbp),%rax
L10:
  leave
  ret
```

assistant: ```c
int *circularPermutation(int n, int start, int *returnSize) {
  int last = pow(2, n) - 1;
  int *arr = (int *)malloc(sizeof(int) * (last + 1));
  *returnSize = last + 1;
  if (n == 1) {
    arr[0] = start;
    arr[1] = ((arr[0] + 1) & 1);
    return arr;
  }
  int index = generate(arr, n, start);
  int *ret = (int *)malloc(sizeof(int) * (last + 1));
  for (int i = 0; i < (1 << n); i++)
    ret[i] = arr[(index + i) % (1 << n)];
  free(arr);
  return ret;
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<circularPermutation>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %edi,%r13d
  mov    %esi,%ebp
  mov    %rdx,%r15
  mov    %edi,%esi
  mov    $0x2,%edi
  call   <pow@plt>
  mov    %eax,%r12d
  lea    0x0(,%rax,4),%r14d
  mov    %r14d,%edi
  call   <malloc@plt>
  mov    %rax,%rbx
  mov    %r12d,(%r15)
  cmp    $0x1,%r13d
  je     L38
  mov    %ebp,%edx
  mov    %r13d,%esi
  mov    %rax,%rdi
  call   <generate@plt>
  mov    %eax,%r12d
  mov    %r14d,%edi
  call   <malloc@plt>
  mov    %rax,%rsi
  mov    %rax,%rbp
  mov    $0x1,%edi
  mov    %r13d,%ecx
  shl    %cl,%edi
  test   %edi,%edi
  jle    L25
  mov    %r12d,%ecx
  add    %edi,%r12d
L36:
  mov    %ecx,%eax
  cltd
  idiv   %edi
  movslq %edx,%rdx
  mov    (%rbx,%rdx,4),%eax
  mov    %eax,(%rsi)
  add    $0x1,%ecx
  add    $0x4,%rsi
  cmp    %r12d,%ecx
  jne    L36
L25:
  mov    %rbx,%rdi
  call   <free@plt>
L14:
  mov    %rbp,%rax
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L38:
  mov    %ebp,(%rax)
  add    $0x1,%ebp
  and    $0x1,%ebp
  mov    %ebp,0x4(%rax)
  mov    %rax,%rbp
  jmp    L14
```

assistant: ```c
int *circularPermutation(int n, int start, int *returnSize) {
  int last = pow(2, n) - 1;
  int *arr = (int *)malloc(sizeof(int) * (last + 1));
  *returnSize = last + 1;
  if (n == 1) {
    arr[0] = start;
    arr[1] = ((arr[0] + 1) & 1);
    return arr;
  }
  int index = generate(arr, n, start);
  int *ret = (int *)malloc(sizeof(int) * (last + 1));
  for (int i = 0; i < (1 << n); i++)
    ret[i] = arr[(index + i) % (1 << n)];
  free(arr);
  return ret;
}
```
user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<circularPermutation>:
  endbr64
  push   %r15
  push   %r14
  mov    %rdx,%r14
  push   %r13
  mov    %esi,%r13d
  mov    %edi,%esi
  push   %r12
  mov    %edi,%r12d
  mov    $0x2,%edi
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  call   <pow@plt>
  lea    0x0(,%rax,4),%r15d
  mov    %eax,%ebx
  mov    %r15d,%edi
  call   <malloc@plt>
  mov    %ebx,(%r14)
  mov    %rax,%rbp
  cmp    $0x1,%r12d
  je     L21
  mov    %r13d,%edx
  mov    %r12d,%esi
  mov    %rax,%rdi
  call   <generate@plt>
  mov    %r15d,%edi
  mov    %eax,%ebx
  call   <malloc@plt>
  mov    $0x1,%edi
  mov    %r12d,%ecx
  shl    %cl,%edi
  mov    %rax,%r13
  test   %edi,%edi
  jle    L7
  mov    %rax,%rsi
  lea    (%rdi,%rbx,1),%r8d
  nopl   (%rax)
L38:
  mov    %ebx,%eax
  add    $0x1,%ebx
  add    $0x4,%rsi
  cltd
  idiv   %edi
  movslq %edx,%rdx
  mov    0x0(%rbp,%rdx,4),%eax
  mov    %eax,-0x4(%rsi)
  cmp    %ebx,%r8d
  jne    L38
L7:
  mov    %rbp,%rdi
  call   <free@plt>
L14:
  add    $0x8,%rsp
  mov    %r13,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L21:
  mov    %r13d,(%rax)
  add    $0x1,%r13d
  and    $0x1,%r13d
  mov    %r13d,0x4(%rax)
  mov    %rax,%r13
  jmp    L14
```

assistant: ```c
int *circularPermutation(int n, int start, int *returnSize) {
  int last = pow(2, n) - 1;
  int *arr = (int *)malloc(sizeof(int) * (last + 1));
  *returnSize = last + 1;
  if (n == 1) {
    arr[0] = start;
    arr[1] = ((arr[0] + 1) & 1);
    return arr;
  }
  int index = generate(arr, n, start);
  int *ret = (int *)malloc(sizeof(int) * (last + 1));
  for (int i = 0; i < (1 << n); i++)
    ret[i] = arr[(index + i) % (1 << n)];
  free(arr);
  return ret;
}
```
user: Translate the below assembly code into C programming language:

```asm
<circularPermutation>:
  endbr64
  push   %r15
  push   %r14
  mov    %rdx,%r14
  push   %r13
  mov    %esi,%r13d
  mov    %edi,%esi
  push   %r12
  mov    %edi,%r12d
  mov    $0x2,%edi
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  call   <pow@plt>
  lea    0x0(,%rax,4),%r15d
  mov    %eax,%ebx
  mov    %r15d,%edi
  call   <malloc@plt>
  mov    %ebx,(%r14)
  mov    %rax,%rbp
  cmp    $0x1,%r12d
  je     L37
  mov    %r13d,%edx
  mov    %r12d,%esi
  mov    %rax,%rdi
  call   <generate@plt>
  mov    %r15d,%edi
  mov    %eax,%ebx
  call   <malloc@plt>
  mov    $0x1,%edi
  mov    %r12d,%ecx
  shl    %cl,%edi
  mov    %rax,%r13
  test   %edi,%edi
  jle    L14
  mov    %rax,%rsi
  lea    (%rdi,%rbx,1),%r8d
  nopl   (%rax)
L1:
  mov    %ebx,%eax
  add    $0x1,%ebx
  add    $0x4,%rsi
  cltd
  idiv   %edi
  movslq %edx,%rdx
  mov    0x0(%rbp,%rdx,4),%eax
  mov    %eax,-0x4(%rsi)
  cmp    %ebx,%r8d
  jne    L1
L14:
  mov    %rbp,%rdi
  call   <free@plt>
L32:
  add    $0x8,%rsp
  mov    %r13,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L37:
  lea    0x1(%r13),%eax
  movd   %r13d,%xmm0
  mov    %rbp,%r13
  and    $0x1,%eax
  movd   %eax,%xmm1
  punpckldq %xmm1,%xmm0
  movq   %xmm0,0x0(%rbp)
  jmp    L32
```

assistant: ```c
int *circularPermutation(int n, int start, int *returnSize) {
  int last = pow(2, n) - 1;
  int *arr = (int *)malloc(sizeof(int) * (last + 1));
  *returnSize = last + 1;
  if (n == 1) {
    arr[0] = start;
    arr[1] = ((arr[0] + 1) & 1);
    return arr;
  }
  int index = generate(arr, n, start);
  int *ret = (int *)malloc(sizeof(int) * (last + 1));
  for (int i = 0; i < (1 << n); i++)
    ret[i] = arr[(index + i) % (1 << n)];
  free(arr);
  return ret;
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<old_str_xchg>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %rdx,-0x28(%rbp)
  mov    %rcx,-0x30(%rbp)
  cmpq   $0x0,-0x20(%rbp)
  je     L4
  cmpq   $0x0,-0x28(%rbp)
  je     L4
  cmpq   $0x0,-0x30(%rbp)
  je     L4
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L4
  mov    -0x30(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L4
  mov    -0x28(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,-0x8(%rbp)
  jmp    L75
L84:
  mov    -0x10(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x20(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcmp@plt>
  test   %eax,%eax
  jne    L65
  mov    -0x8(%rbp),%rdx
  mov    -0x30(%rbp),%rcx
  mov    -0x18(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  mov    -0x8(%rbp),%rax
  add    %rax,-0x18(%rbp)
  mov    -0x10(%rbp),%rax
  add    %rax,-0x20(%rbp)
  jmp    L75
L65:
  mov    -0x8(%rbp),%rdx
  mov    -0x30(%rbp),%rcx
  mov    -0x20(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcmp@plt>
  test   %eax,%eax
  jne    L16
  mov    -0x10(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x18(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  mov    -0x10(%rbp),%rax
  add    %rax,-0x18(%rbp)
  mov    -0x8(%rbp),%rax
  add    %rax,-0x20(%rbp)
  jmp    L75
L16:
  mov    -0x20(%rbp),%rdx
  lea    0x1(%rdx),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    %rcx,-0x18(%rbp)
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
L75:
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L84
  mov    -0x18(%rbp),%rax
  movb   $0x0,(%rax)
  jmp    L58
L4:
  nop
L58:
  leave
  ret
```

assistant: ```c
void old_str_xchg(char *dst, const char *src, const char *s1, const char *s2) {
  if (!src || !s1 || !s2 || !*s1 || !*s2)
    return;
  size_t s1len = strlen(s1);
  size_t s2len = strlen(s2);
  while (*src) {
    if (!memcmp(src, s1, s1len)) {
      memcpy(dst, s2, s2len);
      dst += s2len;
      src += s1len;
    } else if (!memcmp(src, s2, s2len)) {
      memcpy(dst, s1, s1len);
      dst += s1len;
      src += s2len;
    } else {
      *dst++ = *src++;
    }
  }
  *dst = '\0';
}
```
user: 这段汇编代码用C语言表示是什么样的：

```asm
<old_str_xchg>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdx,%r12
  test   %rdx,%rdx
  sete   %al
  test   %rcx,%rcx
  sete   %dl
  or     %dl,%al
  jne    L4
  mov    %rdi,%rbp
  mov    %rsi,%rbx
  mov    %rcx,%r13
  test   %rsi,%rsi
  je     L4
  cmpb   $0x0,(%r12)
  je     L4
  cmpb   $0x0,(%rcx)
  je     L4
  mov    %r12,%rdi
  call   <strlen@plt>
  mov    %rax,%r14
  mov    %r13,%rdi
  call   <strlen@plt>
  mov    %rax,%r15
  cmpb   $0x0,(%rbx)
  jne    L82
L68:
  movb   $0x0,0x0(%rbp)
L4:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L23:
  mov    %r15,%rdx
  mov    %r13,%rsi
  mov    %rbx,%rdi
  call   <memcmp@plt>
  test   %eax,%eax
  je     L2
  movzbl (%rbx),%eax
  mov    %al,0x0(%rbp)
  lea    0x1(%rbx),%rbx
  lea    0x1(%rbp),%rbp
L48:
  cmpb   $0x0,(%rbx)
  je     L68
L82:
  mov    %r14,%rdx
  mov    %r12,%rsi
  mov    %rbx,%rdi
  call   <memcmp@plt>
  test   %eax,%eax
  jne    L23
  mov    %r15,%rdx
  mov    %r13,%rsi
  mov    %rbp,%rdi
  call   <memcpy@plt>
  add    %r15,%rbp
  add    %r14,%rbx
  jmp    L48
L2:
  mov    %r14,%rdx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <memcpy@plt>
  add    %r14,%rbp
  add    %r15,%rbx
  jmp    L48
```

assistant: ```c
void old_str_xchg(char *dst, const char *src, const char *s1, const char *s2) {
  if (!src || !s1 || !s2 || !*s1 || !*s2)
    return;
  size_t s1len = strlen(s1);
  size_t s2len = strlen(s2);
  while (*src) {
    if (!memcmp(src, s1, s1len)) {
      memcpy(dst, s2, s2len);
      dst += s2len;
      src += s1len;
    } else if (!memcmp(src, s2, s2len)) {
      memcpy(dst, s1, s1len);
      dst += s1len;
      src += s2len;
    } else {
      *dst++ = *src++;
    }
  }
  *dst = '\0';
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<old_str_xchg>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  test   %rdx,%rdx
  sete   %al
  test   %rcx,%rcx
  sete   %dl
  or     %dl,%al
  jne    L25
  mov    %rsi,%rbx
  test   %rsi,%rsi
  je     L25
  cmpb   $0x0,(%r12)
  je     L25
  cmpb   $0x0,(%rcx)
  mov    %rcx,%r13
  je     L25
  mov    %rdi,%rbp
  mov    %r12,%rdi
  call   <strlen@plt>
  mov    %r13,%rdi
  mov    %rax,%r14
  call   <strlen@plt>
  mov    %rax,%r15
  nopl   (%rax)
L58:
  cmpb   $0x0,(%rbx)
  je     L0
L17:
  mov    %r14,%rdx
  mov    %r12,%rsi
  mov    %rbx,%rdi
  call   <memcmp@plt>
  mov    %r15,%rdx
  mov    %r13,%rsi
  test   %eax,%eax
  jne    L70
  mov    %rbp,%rdi
  add    %r14,%rbx
  add    %r15,%rbp
  call   <memcpy@plt>
  cmpb   $0x0,(%rbx)
  jne    L17
L0:
  movb   $0x0,0x0(%rbp)
L25:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L70:
  mov    %rbx,%rdi
  call   <memcmp@plt>
  test   %eax,%eax
  je     L74
  movzbl (%rbx),%eax
  add    $0x1,%rbp
  add    $0x1,%rbx
  mov    %al,-0x1(%rbp)
  jmp    L58
  nopl   0x0(%rax)
L74:
  mov    %rbp,%rdi
  mov    %r14,%rdx
  mov    %r12,%rsi
  add    %r14,%rbp
  call   <memcpy@plt>
  add    %r15,%rbx
  jmp    L58
```

assistant: ```c
void old_str_xchg(char *dst, const char *src, const char *s1, const char *s2) {
  if (!src || !s1 || !s2 || !*s1 || !*s2)
    return;
  size_t s1len = strlen(s1);
  size_t s2len = strlen(s2);
  while (*src) {
    if (!memcmp(src, s1, s1len)) {
      memcpy(dst, s2, s2len);
      dst += s2len;
      src += s1len;
    } else if (!memcmp(src, s2, s2len)) {
      memcpy(dst, s1, s1len);
      dst += s1len;
      src += s2len;
    } else {
      *dst++ = *src++;
    }
  }
  *dst = '\0';
}
```
user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<old_str_xchg>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  test   %rdx,%rdx
  sete   %al
  test   %rcx,%rcx
  sete   %dl
  or     %dl,%al
  jne    L9
  mov    %rsi,%rbx
  test   %rsi,%rsi
  je     L9
  cmpb   $0x0,(%r12)
  je     L9
  cmpb   $0x0,(%rcx)
  mov    %rcx,%r13
  je     L9
  mov    %rdi,%rbp
  mov    %r12,%rdi
  call   <strlen@plt>
  mov    %r13,%rdi
  mov    %rax,%r14
  call   <strlen@plt>
  mov    %rax,%r15
  nopl   (%rax)
L79:
  cmpb   $0x0,(%rbx)
  je     L43
L12:
  mov    %r14,%rdx
  mov    %r12,%rsi
  mov    %rbx,%rdi
  call   <memcmp@plt>
  mov    %r15,%rdx
  mov    %r13,%rsi
  test   %eax,%eax
  jne    L31
  mov    %rbp,%rdi
  add    %r14,%rbx
  add    %r15,%rbp
  call   <memcpy@plt>
  cmpb   $0x0,(%rbx)
  jne    L12
L43:
  movb   $0x0,0x0(%rbp)
L9:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L31:
  mov    %rbx,%rdi
  call   <memcmp@plt>
  test   %eax,%eax
  je     L93
  movzbl (%rbx),%eax
  add    $0x1,%rbp
  add    $0x1,%rbx
  mov    %al,-0x1(%rbp)
  jmp    L79
  nopl   0x0(%rax)
L93:
  mov    %rbp,%rdi
  mov    %r14,%rdx
  mov    %r12,%rsi
  add    %r14,%rbp
  call   <memcpy@plt>
  add    %r15,%rbx
  jmp    L79
```

assistant: ```c
void old_str_xchg(char *dst, const char *src, const char *s1, const char *s2) {
  if (!src || !s1 || !s2 || !*s1 || !*s2)
    return;
  size_t s1len = strlen(s1);
  size_t s2len = strlen(s2);
  while (*src) {
    if (!memcmp(src, s1, s1len)) {
      memcpy(dst, s2, s2len);
      dst += s2len;
      src += s1len;
    } else if (!memcmp(src, s2, s2len)) {
      memcpy(dst, s1, s1len);
      dst += s1len;
      src += s2len;
    } else {
      *dst++ = *src++;
    }
  }
  *dst = '\0';
}
```