user: Converte this assembly snippet into its equivalent C code:

```asm
<us3tensor>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %rdi,0x8(%rsp)
  mov    %rsi,0x20(%rsp)
  mov    %rdx,%r13
  mov    %rcx,%r14
  mov    %r8,0x28(%rsp)
  sub    %rdi,%rsi
  mov    %rsi,%r15
  add    $0x1,%r15
  mov    %rcx,%rax
  sub    %rdx,%rax
  add    $0x1,%rax
  mov    %rax,0x10(%rsp)
  sub    %r8,%r9
  lea    0x1(%r9),%rbx
  lea    0x0(,%r15,8),%rdi
  call   <malloc@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L63
L84:
  mov    0x8(%rsp),%rax
  shl    $0x3,%rax
  mov    %rbp,%rdi
  sub    %rax,%rdi
  mov    %rdi,0x18(%rsp)
  imul   0x10(%rsp),%r15
  lea    0x0(,%r15,8),%rdi
  call   <malloc@plt>
  mov    %rax,0x0(%rbp)
  test   %rax,%rax
  je     L104
L117:
  lea    0x0(,%r13,8),%r12
  sub    %r12,0x0(%rbp)
  imul   %rbx,%r15
  lea    0x0(,%r15,4),%rdi
  call   <malloc@plt>
  mov    0x0(%rbp),%rdx
  mov    %rax,(%rdx,%r13,8)
  mov    0x0(%rbp),%rax
  cmpq   $0x0,(%rax,%r13,8)
  je     L43
L30:
  mov    %r12,%rdx
  add    0x0(%rbp),%rdx
  mov    0x28(%rsp),%rax
  shl    $0x2,%rax
  sub    %rax,(%rdx)
  lea    0x1(%r13),%r9
  cmp    %r9,%r14
  jl     L72
  lea    0x0(,%rbx,4),%r8
  lea    0x1(%r14),%rdi
  mov    %r12,%rdx
  mov    %r9,%rax
L97:
  mov    0x0(%rbp),%rcx
  mov    %r8,%rsi
  add    (%rcx,%rdx,1),%rsi
  mov    %rsi,(%rcx,%rax,8)
  add    $0x1,%rax
  add    $0x8,%rdx
  cmp    %rdi,%rax
  jne    L97
L72:
  mov    0x20(%rsp),%rdi
  mov    0x8(%rsp),%rax
  cmp    %rax,%rdi
  jle    L95
  mov    0x10(%rsp),%rax
  lea    0x0(,%rax,8),%r11
  imul   %rbx,%rax
  mov    %rax,%r10
  shl    $0x2,%r10
  shl    $0x2,%rbx
  mov    0x18(%rsp),%rax
  lea    (%rax,%rdi,8),%r15
  shl    $0x3,%r13
  lea    0x1(%r14),%r8
L106:
  mov    %rbp,%rdi
  mov    0x0(%rbp),%rdx
  lea    (%rdx,%r11,1),%rax
  mov    %rax,0x8(%rbp)
  mov    %r10,%rcx
  add    (%rdx,%r12,1),%rcx
  mov    %rcx,(%rax,%r12,1)
  cmp    %r9,%r14
  jl     L65
  mov    %r13,%rdx
  mov    %r9,%rax
L119:
  mov    0x8(%rdi),%rcx
  mov    %rbx,%rsi
  add    (%rcx,%rdx,1),%rsi
  mov    %rsi,(%rcx,%rax,8)
  add    $0x1,%rax
  add    $0x8,%rdx
  cmp    %r8,%rax
  jne    L119
L65:
  add    $0x8,%rbp
  cmp    %r15,%rbp
  jne    L106
L95:
  mov    0x18(%rsp),%rax
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L63:
  lea    D15(%rip),%rdi
  call   <nrerror@plt>
  jmp    L84
L104:
  lea    D29(%rip),%rdi
  call   <nrerror@plt>
  jmp    L117
L43:
  lea    D23(%rip),%rdi
  call   <nrerror@plt>
  jmp    L30
```

tool_calls: name: disassemble_data
arguments: tag: D15
data_type: string
name: disassemble_data
arguments: tag: D29
data_type: string
name: disassemble_data
arguments: tag: D23
data_type: string

tool: D15: allocation failure 1 in us3tensor()

tool: D29: allocation failure 2 in us3tensor()

tool: D23: allocation failure 3 in s3tensor()

assistant: ```c
ushort ***us3tensor(long nrl, long nrh, long ncl, long nch, long ndl, long ndh) {
  long i, j, nrow = nrh - nrl + 1, ncol = nch - ncl + 1, ndep = ndh - ndl + 1;
  ushort ***t;
  t = (ushort ***)malloc((size_t)((nrow + 0) * sizeof(ushort **)));
  if (!t)
    nrerror("allocation failure 1 in us3tensor()");
  t += 0;
  t -= nrl;
  t[nrl] = (ushort **)malloc((size_t)((nrow * ncol + 0) * sizeof(ushort *)));
  if (!t[nrl])
    nrerror("allocation failure 2 in us3tensor()");
  t[nrl] += 0;
  t[nrl] -= ncl;
  t[nrl][ncl] = (ushort *)malloc((size_t)((nrow * ncol * ndep + 0) * sizeof(ushort)));
  if (!t[nrl][ncl])
    nrerror("allocation failure 3 in s3tensor()");
  t[nrl][ncl] += 0;
  t[nrl][ncl] -= ndl;
  for (j = ncl + 1; j <= nch; j++)
    t[nrl][j] = t[nrl][j - 1] + ndep;
  for (i = nrl + 1; i <= nrh; i++) {
    t[i] = t[i - 1] + ncol;
    t[i][ncl] = t[i - 1][ncl] + ncol * ndep;
    for (j = ncl + 1; j <= nch; j++)
      t[i][j] = t[i][j - 1] + ndep;
  }
  return t;
}
```