user: What would the C source look like for the assembly code provided here:

```asm
<alloc_3d_char>:
  endbr64
  push   %r15
  mov    %esi,%r15d
  push   %r14
  push   %r13
  push   %r12
  mov    %edi,%r12d
  mov    %r12d,%edi
  push   %rbp
  imul   %esi,%edi
  push   %rbx
  mov    %edx,%ebx
  imul   %edx,%edi
  sub    $0x38,%rsp
  call   <malloc@plt>
  lea    0x0(,%r12,8),%edi
  mov    %rax,%rbp
  call   <malloc@plt>
  mov    %rax,0x28(%rsp)
  test   %rbp,%rbp
  je     L75
  test   %rax,%rax
  je     L75
  test   %r12d,%r12d
  jle    L17
  mov    %rax,%r13
  lea    (%rax,%r12,8),%rax
  mov    %ebx,%edi
  mov    %r15d,%r12d
  mov    %rax,0x10(%rsp)
  lea    -0x1(%r15),%eax
  and    $0xfffffffc,%r12d
  xor    %r14d,%r14d
  mov    %eax,0x20(%rsp)
  mov    %r15d,%eax
  imul   %r15d,%edi
  lea    0x0(,%r15,8),%ecx
  shr    $0x2,%eax
  mov    %r12d,0x24(%rsp)
  mov    %r15d,%r12d
  mov    %r13,%r15
  sub    $0x1,%eax
  mov    %ecx,%r13d
  add    $0x1,%rax
  mov    %edi,0xc(%rsp)
  shl    $0x5,%rax
  mov    %rax,0x18(%rsp)
  nopl   0x0(%rax)
L19:
  mov    %r13d,%edi
  call   <malloc@plt>
  mov    %rax,(%r15)
  test   %rax,%rax
  je     L75
  test   %r12d,%r12d
  movdqa D1(%rip),%xmm7
  jle    L45
  cmpl   $0x2,0x20(%rsp)
  movslq %r14d,%rdi
  jbe    L59
  movd   %ebx,%xmm5
  mov    0x18(%rsp),%rsi
  mov    %rax,%rdx
  movq   %rdi,%xmm3
  pshufd $0x0,%xmm5,%xmm4
  punpcklqdq %xmm3,%xmm3
  pxor   %xmm5,%xmm5
  movdqa D8(%rip),%xmm2
  movq   %rbp,%xmm0
  movdqa %xmm4,%xmm6
  lea    (%rsi,%rax,1),%rcx
  punpcklqdq %xmm0,%xmm0
  psrlq  $0x20,%xmm6
  paddq  %xmm0,%xmm3
  nopl   0x0(%rax,%rax,1)
L98:
  movdqa %xmm2,%xmm1
  movdqa %xmm5,%xmm8
  paddd  %xmm7,%xmm2
  add    $0x20,%rdx
  movdqa %xmm1,%xmm0
  psrlq  $0x20,%xmm1
  pmuludq %xmm4,%xmm0
  pmuludq %xmm6,%xmm1
  pshufd $0x8,%xmm0,%xmm0
  pshufd $0x8,%xmm1,%xmm1
  punpckldq %xmm1,%xmm0
  pcmpgtd %xmm0,%xmm8
  movdqa %xmm0,%xmm1
  punpckldq %xmm8,%xmm1
  punpckhdq %xmm8,%xmm0
  paddq  %xmm3,%xmm1
  paddq  %xmm3,%xmm0
  movups %xmm1,-0x20(%rdx)
  movups %xmm0,-0x10(%rdx)
  cmp    %rcx,%rdx
  jne    L98
  mov    0x24(%rsp),%esi
  mov    %esi,%ecx
  cmp    %esi,%r12d
  je     L45
L129:
  mov    %ebx,%edx
  movslq %ecx,%r10
  imul   %ecx,%edx
  lea    0x0(,%r10,8),%r11
  movslq %edx,%rsi
  add    %rdi,%rsi
  add    %rbp,%rsi
  mov    %rsi,(%rax,%r10,8)
  lea    0x1(%rcx),%esi
  cmp    %esi,%r12d
  jle    L45
  add    %ebx,%edx
  add    $0x2,%ecx
  movslq %edx,%rsi
  add    %rdi,%rsi
  add    %rbp,%rsi
  mov    %rsi,0x8(%rax,%r11,1)
  cmp    %ecx,%r12d
  jle    L45
  add    %ebx,%edx
  movslq %edx,%rdx
  add    %rdi,%rdx
  add    %rbp,%rdx
  mov    %rdx,0x10(%rax,%r11,1)
L45:
  add    $0x8,%r15
  add    0xc(%rsp),%r14d
  cmp    0x10(%rsp),%r15
  jne    L19
L17:
  mov    0x28(%rsp),%rax
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L59:
  xor    %ecx,%ecx
  jmp    L129
L75:
  movq   $0x0,0x28(%rsp)
  jmp    L17
```

tool_calls: name: retrieve_data
arguments: data_label: D1
datatype: byte[16]
name: retrieve_data
arguments: data_label: D8
datatype: byte[16]

tool: {"D1": [0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00]}

tool: {"D8": [0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x02,0x00,0x00,0x00,0x03,0x00,0x00,0x00]}

assistant: ```c
char ***alloc_3d_char(int ndim1, int ndim2, int ndim3) {
  char *space = malloc(ndim1 * ndim2 * ndim3 * sizeof(char));
  char ***array3 = malloc(ndim1 * sizeof(char **));
  int i, j;
  if (space == NULL || array3 == NULL)
    return NULL;
  for (j = 0; j < ndim1; j++) {
    array3[j] = malloc(ndim2 * sizeof(char *));
    if (array3[j] == NULL)
      return NULL;
    for (i = 0; i < ndim2; i++)
      array3[j][i] = space + j * (ndim3 * ndim2) + i * ndim3;
  }
  return array3;
}
```