ylfeng/ReF-Decompile-dataset huggingface dataset:
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<encode_artnet_uint16_lohi>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %edi,%eax
  mov    %rsi,-0x10(%rbp)
  mov    %ax,-0x4(%rbp)
  movzwl -0x4(%rbp),%eax
  mov    %eax,%edx
  mov    -0x10(%rbp),%rax
  mov    %dl,(%rax)
  movzwl -0x4(%rbp),%eax
  shr    $0x8,%ax
  mov    %eax,%edx
  mov    -0x10(%rbp),%rax
  add    $0x1,%rax
  mov    %dl,(%rax)
  nop
  pop    %rbp
  ret
```

assistant: ```c
void encode_artnet_uint16_lohi(unsigned short n, unsigned char *data) {
  data[0] = n & 0xFF;
  data[1] = (n >> 8) & 0xFF;
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<encode_artnet_uint16_lohi>:
  endbr64
  mov    %edi,%eax
  mov    %dil,(%rsi)
  movzbl %ah,%eax
  mov    %al,0x1(%rsi)
  ret
```

assistant: ```c
void encode_artnet_uint16_lohi(unsigned short n, unsigned char *data) {
  data[0] = n & 0xFF;
  data[1] = (n >> 8) & 0xFF;
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<encode_artnet_uint16_lohi>:
  endbr64
  mov    %di,(%rsi)
  ret
```

assistant: ```c
void encode_artnet_uint16_lohi(unsigned short n, unsigned char *data) {
  data[0] = n & 0xFF;
  data[1] = (n >> 8) & 0xFF;
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<encode_artnet_uint16_lohi>:
  endbr64
  mov    %di,(%rsi)
  ret
```

assistant: ```c
void encode_artnet_uint16_lohi(unsigned short n, unsigned char *data) {
  data[0] = n & 0xFF;
  data[1] = (n >> 8) & 0xFF;
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<Map12>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  movsd  %xmm0,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  movq   %rax,%xmm0
  call   <Map24@plt>
  movq   %xmm0,%rax
  mov    %rax,-0x8(%rbp)
  movsd  -0x8(%rbp),%xmm0
  comisd D7(%rip),%xmm0
  jb     L5
  movsd  -0x8(%rbp),%xmm0
  movsd  D2(%rip),%xmm1
  subsd  %xmm1,%xmm0
  jmp    L12
L5:
  movsd  -0x8(%rbp),%xmm0
L12:
  movq   %xmm0,%rax
  movq   %rax,%xmm0
  leave
  ret
```

tool_calls: name: parse_data
arguments: data_label: D7
data_type: f64[2]
name: parse_data
arguments: data_label: D2
data_type: f64

tool: {"D7": [12.0,24.0]}

tool: D2: 24

assistant: ```c
double Map12(double hour) {
  double hour24;
  hour24 = Map24(hour);
  if (hour24 >= 12.0) {
    return (hour24 - 24.0);
  } else {
    return (hour24);
  }
}
```
user: What is the c source code of the assembly code below:

```asm
<Map12>:
  endbr64
  sub    $0x8,%rsp
  call   <Map24@plt>
  comisd D13(%rip),%xmm0
  jb     L3
  subsd  D10(%rip),%xmm0
L3:
  add    $0x8,%rsp
  ret
```

tool_calls: name: read_data
arguments: data_label: D13
type_guessed: f64[2]
name: read_data
arguments: data_label: D10
type_guessed: f64

tool: {"D13": [12.0,24.0]}

tool: D10: 24

assistant: ```c
double Map12(double hour) {
  double hour24;
  hour24 = Map24(hour);
  if (hour24 >= 12.0) {
    return (hour24 - 24.0);
  } else {
    return (hour24);
  }
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<Map12>:
  endbr64
  sub    $0x8,%rsp
  call   <Map24@plt>
  comisd D6(%rip),%xmm0
  jb     L4
  subsd  D19(%rip),%xmm0
L4:
  add    $0x8,%rsp
  ret
```

tool_calls: name: unpack_data
arguments: tag: D6
datatype: f64[2]
name: unpack_data
arguments: tag: D19
datatype: f64

tool: {"D6": [12.0,24.0]}

tool: D19: 24

assistant: ```c
double Map12(double hour) {
  double hour24;
  hour24 = Map24(hour);
  if (hour24 >= 12.0) {
    return (hour24 - 24.0);
  } else {
    return (hour24);
  }
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<Map12>:
  endbr64
  sub    $0x8,%rsp
  call   <Map24@plt>
  comisd D5(%rip),%xmm0
  jb     L4
  subsd  D6(%rip),%xmm0
L4:
  add    $0x8,%rsp
  ret
```

tool_calls: name: retrieve_data
arguments: label: D5
datatype: f64[2]
name: retrieve_data
arguments: label: D6
datatype: f64

tool: {"D5": [12.0,24.0]}

tool: D6: 24

assistant: ```c
double Map12(double hour) {
  double hour24;
  hour24 = Map24(hour);
  if (hour24 >= 12.0) {
    return (hour24 - 24.0);
  } else {
    return (hour24);
  }
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<get_physical_package_id>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  add    $0xffffffffffffff80,%rsp
  mov    %edi,-0x74(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    -0x74(%rbp),%edx
  lea    -0x60(%rbp),%rax
  lea    D9(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sprintf@plt>
  lea    -0x60(%rbp),%rax
  lea    D6(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x68(%rbp)
  cmpq   $0x0,-0x68(%rbp)
  jne    L0
  lea    -0x60(%rbp),%rax
  mov    %rax,%rdi
  call   <perror@plt>
  mov    $0x1,%edi
  call   <exit@plt>
L0:
  lea    -0x6c(%rbp),%rdx
  mov    -0x68(%rbp),%rax
  lea    D24(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <fscanf@plt>
  mov    -0x68(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    -0x6c(%rbp),%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L5
  call   <__stack_chk_fail@plt>
L5:
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: data_tag: D9
data_type: string
name: disassemble_data
arguments: data_tag: D6
data_type: string
name: disassemble_data
arguments: data_tag: D24
data_type: string

tool: D9: /sys/devices/system/cpu/cpu%d/topology/physical_package_id

tool: D6: r

tool: D24: %d

assistant: ```c
int get_physical_package_id(int cpu) {
  char path[80];
  FILE *filep;
  int pkg;
  sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/physical_package_id", cpu);
  filep = fopen(path, "r");
  if (filep == NULL) {
    perror(path);
    exit(1);
  }
  fscanf(filep, "%d", &pkg);
  fclose(filep);
  return pkg;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<get_physical_package_id>:
  endbr64
  push   %rbx
  sub    $0x70,%rsp
  mov    %edi,%edx
  mov    %fs:0x28,%rax
  mov    %rax,0x68(%rsp)
  xor    %eax,%eax
  lea    0x10(%rsp),%rbx
  lea    D6(%rip),%rsi
  mov    %rbx,%rdi
  call   <sprintf@plt>
  lea    D14(%rip),%rsi
  mov    %rbx,%rdi
  call   <fopen@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L14
L19:
  lea    0xc(%rsp),%rdx
  lea    D15(%rip),%rsi
  mov    %rbx,%rdi
  call   <fscanf@plt>
  mov    %rbx,%rdi
  call   <fclose@plt>
  mov    0xc(%rsp),%eax
  mov    0x68(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L6
  add    $0x70,%rsp
  pop    %rbx
  ret
L14:
  lea    0x10(%rsp),%rdi
  call   <perror@plt>
  mov    $0x1,%edi
  call   <exit@plt>
  jmp    L19
L6:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: tag: D6
type: string
name: read_data
arguments: tag: D14
type: string
name: read_data
arguments: tag: D15
type: string

tool: D6: /sys/devices/system/cpu/cpu%d/topology/physical_package_id

tool: D14: r

tool: D15: %d

assistant: ```c
int get_physical_package_id(int cpu) {
  char path[80];
  FILE *filep;
  int pkg;
  sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/physical_package_id", cpu);
  filep = fopen(path, "r");
  if (filep == NULL) {
    perror(path);
    exit(1);
  }
  fscanf(filep, "%d", &pkg);
  fclose(filep);
  return pkg;
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<get_physical_package_id>:
  endbr64
  push   %r12
  mov    %edi,%edx
  lea    D22(%rip),%rsi
  push   %rbp
  sub    $0x78,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x68(%rsp)
  xor    %eax,%eax
  lea    0x10(%rsp),%r12
  mov    %r12,%rdi
  call   <sprintf@plt>
  lea    D15(%rip),%rsi
  mov    %r12,%rdi
  call   <fopen@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L20
L22:
  lea    0xc(%rsp),%rdx
  lea    D2(%rip),%rsi
  mov    %rbp,%rdi
  call   <fscanf@plt>
  mov    %rbp,%rdi
  call   <fclose@plt>
  mov    0xc(%rsp),%eax
  mov    0x68(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L11
  add    $0x78,%rsp
  pop    %rbp
  pop    %r12
  ret
L20:
  mov    %r12,%rdi
  call   <perror@plt>
  mov    $0x1,%edi
  call   <exit@plt>
  jmp    L22
L11:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: data_label: D22
type: string
name: read_data
arguments: data_label: D15
type: string
name: read_data
arguments: data_label: D2
type: string

tool: D22: /sys/devices/system/cpu/cpu%d/topology/physical_package_id

tool: D15: r

tool: D2: %d

assistant: ```c
int get_physical_package_id(int cpu) {
  char path[80];
  FILE *filep;
  int pkg;
  sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/physical_package_id", cpu);
  filep = fopen(path, "r");
  if (filep == NULL) {
    perror(path);
    exit(1);
  }
  fscanf(filep, "%d", &pkg);
  fclose(filep);
  return pkg;
}
```
user: Translate the below assembly code into C programming language:

```asm
<get_physical_package_id>:
  endbr64
  push   %r12
  mov    %edi,%edx
  lea    D5(%rip),%rsi
  push   %rbp
  sub    $0x78,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x68(%rsp)
  xor    %eax,%eax
  lea    0x10(%rsp),%r12
  mov    %r12,%rdi
  call   <sprintf@plt>
  lea    D17(%rip),%rsi
  mov    %r12,%rdi
  call   <fopen@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L12
L19:
  lea    0xc(%rsp),%rdx
  lea    D4(%rip),%rsi
  mov    %rbp,%rdi
  call   <fscanf@plt>
  mov    %rbp,%rdi
  call   <fclose@plt>
  mov    0xc(%rsp),%eax
  mov    0x68(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L10
  add    $0x78,%rsp
  pop    %rbp
  pop    %r12
  ret
L12:
  mov    %r12,%rdi
  call   <perror@plt>
  mov    $0x1,%edi
  call   <exit@plt>
  jmp    L19
L10:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: parse_data
arguments: data_label: D5
data_type: string
name: parse_data
arguments: data_label: D17
data_type: string
name: parse_data
arguments: data_label: D4
data_type: string

tool: D5: /sys/devices/system/cpu/cpu%d/topology/physical_package_id

tool: D17: r

tool: D4: %d

assistant: ```c
int get_physical_package_id(int cpu) {
  char path[80];
  FILE *filep;
  int pkg;
  sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/physical_package_id", cpu);
  filep = fopen(path, "r");
  if (filep == NULL) {
    perror(path);
    exit(1);
  }
  fscanf(filep, "%d", &pkg);
  fclose(filep);
  return pkg;
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<factorial>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %edi,-0x14(%rbp)
  movl   $0x1,-0x8(%rbp)
  movl   $0x1,-0x4(%rbp)
  jmp    L10
L5:
  mov    -0x8(%rbp),%eax
  imul   -0x4(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  addl   $0x1,-0x4(%rbp)
L10:
  mov    -0x4(%rbp),%eax
  cmp    -0x14(%rbp),%eax
  jle    L5
  mov    -0x8(%rbp),%eax
  pop    %rbp
  ret
```

assistant: ```c
int factorial(int x) {
  int factorial = 1, i;
  for (i = 1; i <= x; i++) {
    factorial *= i;
  }
  return factorial;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<factorial>:
  endbr64
  test   %edi,%edi
  jle    L18
  add    $0x1,%edi
  mov    $0x1,%eax
  mov    $0x1,%edx
L4:
  imul   %eax,%edx
  add    $0x1,%eax
  cmp    %edi,%eax
  jne    L4
L5:
  mov    %edx,%eax
  ret
L18:
  mov    $0x1,%edx
  jmp    L5
```

assistant: ```c
int factorial(int x) {
  int factorial = 1, i;
  for (i = 1; i <= x; i++) {
    factorial *= i;
  }
  return factorial;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<factorial>:
  endbr64
  test   %edi,%edi
  jle    L16
  add    $0x1,%edi
  mov    $0x1,%eax
  mov    $0x1,%r8d
  cs nopw 0x0(%rax,%rax,1)
L10:
  imul   %eax,%r8d
  add    $0x1,%eax
  cmp    %edi,%eax
  jne    L10
  mov    %r8d,%eax
  ret
  nop
L16:
  mov    $0x1,%r8d
  mov    %r8d,%eax
  ret
```

assistant: ```c
int factorial(int x) {
  int factorial = 1, i;
  for (i = 1; i <= x; i++) {
    factorial *= i;
  }
  return factorial;
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<factorial>:
  endbr64
  test   %edi,%edi
  jle    L13
  add    $0x1,%edi
  mov    $0x1,%eax
  mov    $0x1,%r8d
  cs nopw 0x0(%rax,%rax,1)
L5:
  imul   %eax,%r8d
  add    $0x1,%eax
  cmp    %edi,%eax
  jne    L5
  mov    %r8d,%eax
  ret
  nop
L13:
  mov    $0x1,%r8d
  mov    %r8d,%eax
  ret
```

assistant: ```c
int factorial(int x) {
  int factorial = 1, i;
  for (i = 1; i <= x; i++) {
    factorial *= i;
  }
  return factorial;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0xbc0,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  lea    -0xbc0(%rbp),%rax
  mov    $0xbb8,%esi
  mov    %rax,%rdi
  call   <init_sieve@plt>
  lea    -0xbc0(%rbp),%rax
  mov    $0x1,%edx
  mov    $0x1e,%esi
  mov    %rax,%rdi
  call   <strange_unique_prime_triplets@plt>
  lea    -0xbc0(%rbp),%rax
  mov    $0x0,%edx
  mov    $0x3e8,%esi
  mov    %rax,%rdi
  call   <strange_unique_prime_triplets@plt>
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L9
  call   <__stack_chk_fail@plt>
L9:
  leave
  ret
```

assistant: ```c
int main() {
  unsigned char sieve[3000];
  init_sieve(sieve, 3000);
  strange_unique_prime_triplets(sieve, 30, true);
  strange_unique_prime_triplets(sieve, 1000, false);
  return 0;
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<main>:
  endbr64
  push   %rbx
  sub    $0xbc0,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0xbb8(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbx
  mov    $0xbb8,%esi
  mov    %rbx,%rdi
  call   <init_sieve@plt>
  mov    $0x1,%edx
  mov    $0x1e,%esi
  mov    %rbx,%rdi
  call   <strange_unique_prime_triplets@plt>
  mov    $0x0,%edx
  mov    $0x3e8,%esi
  mov    %rbx,%rdi
  call   <strange_unique_prime_triplets@plt>
  mov    0xbb8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L5
  mov    $0x0,%eax
  add    $0xbc0,%rsp
  pop    %rbx
  ret
L5:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int main() {
  unsigned char sieve[3000];
  init_sieve(sieve, 3000);
  strange_unique_prime_triplets(sieve, 30, true);
  strange_unique_prime_triplets(sieve, 1000, false);
  return 0;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<main>:
  endbr64
  push   %rbp
  mov    $0xbb8,%esi
  sub    $0xbc0,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0xbb8(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbp
  mov    %rbp,%rdi
  call   <init_sieve@plt>
  mov    $0x1,%edx
  mov    $0x1e,%esi
  mov    %rbp,%rdi
  call   <strange_unique_prime_triplets@plt>
  xor    %edx,%edx
  mov    $0x3e8,%esi
  mov    %rbp,%rdi
  call   <strange_unique_prime_triplets@plt>
  mov    0xbb8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L0
  add    $0xbc0,%rsp
  xor    %eax,%eax
  pop    %rbp
  ret
L0:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int main() {
  unsigned char sieve[3000];
  init_sieve(sieve, 3000);
  strange_unique_prime_triplets(sieve, 30, true);
  strange_unique_prime_triplets(sieve, 1000, false);
  return 0;
}
```
user: 这段汇编代码用C语言表示是什么样的？

```asm
<main>:
  endbr64
  push   %rbp
  mov    $0xbb8,%esi
  sub    $0xbc0,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0xbb8(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbp
  mov    %rbp,%rdi
  call   <init_sieve@plt>
  mov    $0x1,%edx
  mov    $0x1e,%esi
  mov    %rbp,%rdi
  call   <strange_unique_prime_triplets@plt>
  xor    %edx,%edx
  mov    $0x3e8,%esi
  mov    %rbp,%rdi
  call   <strange_unique_prime_triplets@plt>
  mov    0xbb8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L2
  add    $0xbc0,%rsp
  xor    %eax,%eax
  pop    %rbp
  ret
L2:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int main() {
  unsigned char sieve[3000];
  init_sieve(sieve, 3000);
  strange_unique_prime_triplets(sieve, 30, true);
  strange_unique_prime_triplets(sieve, 1000, false);
  return 0;
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<fast_url_decode>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x18,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    -0x28(%rbp),%rbx
  mov    -0x30(%rbp),%r12
  jmp    L37
L8:
  movzbl (%rbx),%eax
  cmp    $0x25,%al
  jne    L51
  lea    0x1(%rbx),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L43
  lea    0x2(%rbx),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L43
  lea    0x1(%rbx),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <from_hex@plt>
  shl    $0x4,%eax
  mov    %eax,%r13d
  lea    0x2(%rbx),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <from_hex@plt>
  mov    %eax,%edx
  mov    %r12,%rax
  lea    0x1(%rax),%r12
  or     %r13d,%edx
  mov    %dl,(%rax)
  add    $0x2,%rbx
  jmp    L43
L51:
  movzbl (%rbx),%eax
  cmp    $0x2b,%al
  jne    L77
  mov    %r12,%rax
  lea    0x1(%rax),%r12
  movb   $0x20,(%rax)
  jmp    L43
L77:
  mov    %r12,%rax
  lea    0x1(%rax),%r12
  movzbl (%rbx),%edx
  mov    %dl,(%rax)
L43:
  add    $0x1,%rbx
L37:
  movzbl (%rbx),%eax
  test   %al,%al
  jne    L8
  movb   $0x0,(%r12)
  mov    %r12,%rax
  sub    -0x30(%rbp),%rax
  add    $0x18,%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %rbp
  ret
```

assistant: ```c
int fast_url_decode(const char *str, char *buf) {
  register const char *pstr = str;
  register char *pbuf = buf;
  while (*pstr) {
    if (*pstr == '%') {
      if (pstr[1] && pstr[2]) {
        *pbuf++ = from_hex(pstr[1]) << 4 | from_hex(pstr[2]);
        pstr += 2;
      }
    } else if (*pstr == '+') {
      *pbuf++ = ' ';
    } else {
      *pbuf++ = *pstr;
    }
    pstr++;
  }
  *pbuf = '\0';
  return pbuf - buf;
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<fast_url_decode>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rsi,%r12
  movzbl (%rdi),%eax
  test   %al,%al
  je     L5
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  jmp    L82
L51:
  movzbl 0x1(%rbx),%edi
  test   %dil,%dil
  je     L55
  cmpb   $0x0,0x2(%rbx)
  jne    L67
  movzbl 0x1(%rbx),%eax
  lea    0x1(%rbx),%rbx
  jmp    L82
L67:
  movsbl %dil,%edi
  call   <from_hex@plt>
  mov    %eax,%r13d
  movsbl 0x2(%rbx),%edi
  call   <from_hex@plt>
  shl    $0x4,%r13d
  or     %eax,%r13d
  mov    %r13b,0x0(%rbp)
  lea    0x2(%rbx),%rax
  lea    0x1(%rbp),%rbp
  jmp    L4
L98:
  movb   $0x20,0x0(%rbp)
  lea    0x1(%rbp),%rbp
  mov    %rbx,%rax
L4:
  lea    0x1(%rax),%rbx
  movzbl 0x1(%rax),%eax
  test   %al,%al
  je     L55
L82:
  cmp    $0x25,%al
  je     L51
  cmp    $0x2b,%al
  je     L98
  mov    %al,0x0(%rbp)
  lea    0x1(%rbp),%rbp
  mov    %rbx,%rax
  jmp    L4
L5:
  mov    %rsi,%rbp
L55:
  movb   $0x0,0x0(%rbp)
  mov    %ebp,%eax
  sub    %r12d,%eax
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
int fast_url_decode(const char *str, char *buf) {
  register const char *pstr = str;
  register char *pbuf = buf;
  while (*pstr) {
    if (*pstr == '%') {
      if (pstr[1] && pstr[2]) {
        *pbuf++ = from_hex(pstr[1]) << 4 | from_hex(pstr[2]);
        pstr += 2;
      }
    } else if (*pstr == '+') {
      *pbuf++ = ' ';
    } else {
      *pbuf++ = *pstr;
    }
    pstr++;
  }
  *pbuf = '\0';
  return pbuf - buf;
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<fast_url_decode>:
  endbr64
  push   %r13
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x8,%rsp
  movzbl (%rdi),%edi
  test   %dil,%dil
  je     L9
L25:
  cmp    $0x25,%dil
  je     L15
L66:
  lea    0x1(%rbp),%rax
  cmp    $0x2b,%dil
  je     L21
  mov    %dil,0x0(%rbp)
  movzbl 0x1(%rbx),%edi
  mov    %rax,%rbp
L47:
  add    $0x1,%rbx
  test   %dil,%dil
  je     L73
  cmp    $0x25,%dil
  jne    L66
L15:
  movsbl 0x1(%rbx),%edi
  test   %dil,%dil
  jne    L49
L73:
  movb   $0x0,0x0(%rbp)
  mov    %ebp,%eax
  add    $0x8,%rsp
  pop    %rbx
  sub    %r12d,%eax
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopw   0x0(%rax,%rax,1)
L21:
  movb   $0x20,0x0(%rbp)
  mov    %rax,%rbp
  movzbl 0x1(%rbx),%edi
  jmp    L47
  nopl   (%rax)
L49:
  cmpb   $0x0,0x2(%rbx)
  jne    L90
  add    $0x1,%rbx
  jmp    L25
  nopl   0x0(%rax)
L90:
  call   <from_hex@plt>
  movsbl 0x2(%rbx),%edi
  add    $0x1,%rbp
  add    $0x2,%rbx
  mov    %eax,%r13d
  call   <from_hex@plt>
  shl    $0x4,%r13d
  or     %eax,%r13d
  mov    %r13b,-0x1(%rbp)
  movzbl 0x1(%rbx),%edi
  jmp    L47
  nopw   0x0(%rax,%rax,1)
L9:
  movb   $0x0,0x0(%rbp)
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
int fast_url_decode(const char *str, char *buf) {
  register const char *pstr = str;
  register char *pbuf = buf;
  while (*pstr) {
    if (*pstr == '%') {
      if (pstr[1] && pstr[2]) {
        *pbuf++ = from_hex(pstr[1]) << 4 | from_hex(pstr[2]);
        pstr += 2;
      }
    } else if (*pstr == '+') {
      *pbuf++ = ' ';
    } else {
      *pbuf++ = *pstr;
    }
    pstr++;
  }
  *pbuf = '\0';
  return pbuf - buf;
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<fast_url_decode>:
  endbr64
  push   %r13
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x8,%rsp
  movzbl (%rdi),%edi
  test   %dil,%dil
  je     L38
L84:
  cmp    $0x25,%dil
  je     L80
L85:
  lea    0x1(%rbp),%rax
  cmp    $0x2b,%dil
  je     L50
  mov    %dil,0x0(%rbp)
  movzbl 0x1(%rbx),%edi
  mov    %rax,%rbp
L39:
  add    $0x1,%rbx
  test   %dil,%dil
  je     L88
  cmp    $0x25,%dil
  jne    L85
L80:
  movsbl 0x1(%rbx),%edi
  test   %dil,%dil
  jne    L41
L88:
  movb   $0x0,0x0(%rbp)
  mov    %ebp,%eax
  add    $0x8,%rsp
  pop    %rbx
  sub    %r12d,%eax
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopw   0x0(%rax,%rax,1)
L50:
  movb   $0x20,0x0(%rbp)
  mov    %rax,%rbp
  movzbl 0x1(%rbx),%edi
  jmp    L39
  nopl   (%rax)
L41:
  cmpb   $0x0,0x2(%rbx)
  jne    L7
  add    $0x1,%rbx
  jmp    L84
  nopl   0x0(%rax)
L7:
  call   <from_hex@plt>
  movsbl 0x2(%rbx),%edi
  add    $0x1,%rbp
  add    $0x2,%rbx
  mov    %eax,%r13d
  call   <from_hex@plt>
  shl    $0x4,%r13d
  or     %eax,%r13d
  mov    %r13b,-0x1(%rbp)
  movzbl 0x1(%rbx),%edi
  jmp    L39
  nopw   0x0(%rax,%rax,1)
L38:
  movb   $0x0,0x0(%rbp)
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
int fast_url_decode(const char *str, char *buf) {
  register const char *pstr = str;
  register char *pbuf = buf;
  while (*pstr) {
    if (*pstr == '%') {
      if (pstr[1] && pstr[2]) {
        *pbuf++ = from_hex(pstr[1]) << 4 | from_hex(pstr[2]);
        pstr += 2;
      }
    } else if (*pstr == '+') {
      *pbuf++ = ' ';
    } else {
      *pbuf++ = *pstr;
    }
    pstr++;
  }
  *pbuf = '\0';
  return pbuf - buf;
}
```