user: Demonstrate the C code that generates the assembly output below:

```asm
<string_decode_base64>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  mov    %rsi,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x78,%rsp
  movdqa D45(%rip),%xmm0
  mov    %fs:0x28,%rax
  mov    %rax,0x68(%rsp)
  xor    %eax,%eax
  movb   $0x0,0x60(%rsp)
  movaps %xmm0,0x10(%rsp)
  movdqa D10(%rip),%xmm0
  movb   $0x0,(%rsi)
  movaps %xmm0,0x20(%rsp)
  movdqa D20(%rip),%xmm0
  movaps %xmm0,0x30(%rsp)
  movdqa D42(%rip),%xmm0
  movaps %xmm0,0x40(%rsp)
  movdqa D36(%rip),%xmm0
  movaps %xmm0,0x50(%rsp)
  test   %rdi,%rdi
  je     L164
  movzbl (%rdi),%edx
  mov    %rdi,%rbx
  xor    %r14d,%r14d
  lea    0x9(%rsp),%r15
  test   %dl,%dl
  je     L54
  nopl   (%rax)
L50:
  movl   $0x0,0xc(%rsp)
  xor    %r12d,%r12d
  nopl   0x0(%rax,%rax,1)
L156:
  movzbl %dl,%eax
  mov    %rbx,%rbp
  add    $0x1,%rbx
  movzbl (%rbx),%edx
  lea    -0x2b(%rax),%ecx
  cmp    $0x4f,%cl
  ja     L139
  sub    $0x2b,%eax
  cltq
  movzbl 0x10(%rsp,%rax,1),%eax
  test   %al,%al
  je     L139
  cmp    $0x24,%al
  je     L139
  test   %dl,%dl
  je     L152
  cmp    $0x3d,%al
  je     L156
  movslq %r12d,%rcx
  sub    $0x3e,%eax
  lea    0x1(%r12),%esi
  mov    %al,0xc(%rsp,%rcx,1)
  cmp    $0x3,%r12d
  je     L154
  mov    %esi,%r12d
  jmp    L156
  nopl   0x0(%rax)
L139:
  test   %dl,%dl
  jne    L156
L152:
  movslq %r12d,%rax
  movb   $0x0,0xc(%rsp,%rax,1)
  test   %r12d,%r12d
  jne    L180
L136:
  movzbl 0x1(%rbp),%edx
  test   %dl,%dl
  jne    L50
L54:
  movb   $0x0,0x0(%r13)
  mov    0x68(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L165
  add    $0x78,%rsp
  mov    %r14d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L154:
  lea    0xc(%rsp),%rdi
  mov    %r15,%rsi
  call   <string_convbase64_6x4_to_8x3@plt>
  movzwl 0x9(%rsp),%eax
  mov    %ax,0x0(%r13)
  lea    0x2(%r13),%rax
L163:
  movzbl 0xb(%rsp),%edx
  mov    $0x3,%r12d
  mov    %dl,(%rax)
L138:
  xor    %edx,%edx
  lea    -0x1(%r12),%eax
  test   %r12d,%r12d
  cmovle %edx,%eax
  mov    $0x1,%edx
  lea    0x1(%r14,%rax,1),%r14d
  mov    %r12d,%eax
  cmovle %rdx,%rax
  add    %rax,%r13
  jmp    L136
L180:
  lea    0xc(%rsp),%rdi
  mov    %r15,%rsi
  call   <string_convbase64_6x4_to_8x3@plt>
  sub    $0x1,%r12d
  je     L136
  movzbl 0x9(%rsp),%eax
  mov    %al,0x0(%r13)
  cmp    $0x1,%r12d
  je     L138
  movzbl 0xa(%rsp),%eax
  mov    %al,0x1(%r13)
  lea    0x2(%r13),%rax
  cmp    $0x3,%r12d
  je     L163
  mov    $0x2,%r12d
  jmp    L138
L164:
  xor    %r14d,%r14d
  jmp    L54
L165:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: label: D45
type_guessed: byte[16]
name: retrieve_data
arguments: label: D10
type_guessed: byte[16]
name: retrieve_data
arguments: label: D20
type_guessed: byte[16]
name: retrieve_data
arguments: label: D42
type_guessed: byte[16]
name: retrieve_data
arguments: label: D36
type_guessed: byte[16]

tool: {"D45": [0x7c,0x24,0x24,0x24,0x7d,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x24]}

tool: {"D10": [0x24,0x24,0x24,0x24,0x24,0x24,0x3e,0x3f,0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47]}

tool: {"D20": [0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57]}

tool: {"D42": [0x24,0x24,0x24,0x24,0x24,0x24,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,0x60,0x61]}

tool: {"D36": [0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,0x70,0x71]}

assistant: ```c
int string_decode_base64(const char *from, char *to) {
  const char *ptr_from;
  int length, to_length, i;
  char *ptr_to;
  unsigned char c, in[4], out[3];
  unsigned char base64_table[] = "|$$$}rstuvwxyz{$$$$$$$>?"
                                 "@ABCDEFGHIJKLMNOPQRSTUVW$$$$$$XYZ[\\]^_`abcdefghijklmnopq";
  ptr_from = from;
  ptr_to = to;
  ptr_to[0] = '\0';
  to_length = 0;
  while (ptr_from && ptr_from[0]) {
    length = 0;
    for (i = 0; i < 4; i++) {
      in[i] = 0;
    }
    for (i = 0; i < 4; i++) {
      c = 0;
      while (ptr_from[0] && (c == 0)) {
        c = (unsigned char)ptr_from[0];
        ptr_from++;
        c = ((c < 43) || (c > 122)) ? 0 : base64_table[c - 43];
        if (c)
          c = (c == '$') ? 0 : c - 61;
      }
      if (ptr_from[0]) {
        length++;
        if (c)
          in[i] = c - 1;
      } else {
        in[i] = '\0';
        break;
      }
    }
    if (length) {
      string_convbase64_6x4_to_8x3(in, out);
      for (i = 0; i < length - 1; i++) {
        ptr_to[0] = out[i];
        ptr_to++;
        to_length++;
      }
    }
  }
  ptr_to[0] = '\0';
  return to_length;
}
```