user: 这段汇编代码用C语言表示是什么样的？

```asm
<mmx_blur16>:
  endbr64
  push   %r15
  mov    %r8d,%r15d
  push   %r14
  push   %r13
  push   %r12
  mov    %esi,%r12d
  push   %rbp
  mov    %edx,%ebp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rdi,(%rsp)
  mov    %ecx,0xc(%rsp)
  test   %edx,%edx
  jle    L137
  movslq 0xc(%rsp),%r13
  mov    (%rsp),%r14
  xor    %ebx,%ebx
  add    %r13,%r13
  nopl   0x0(%rax)
L113:
  mov    %r14,%rdi
  mov    %r15d,%edx
  mov    %r12d,%esi
  add    $0x1,%ebx
  call   <mmx16_blurrow@plt>
  add    %r13,%r14
  cmp    %ebx,%ebp
  jne    L113
L137:
  test   %r12d,%r12d
  je     L99
  testb  $0x2,(%rsp)
  jne    L55
  cmp    $0x1,%r12d
  jle    L114
L78:
  mov    0xc(%rsp),%eax
  lea    (%rax,%rax,1),%r13d
  testb  $0x3,(%rsp)
  jne    L31
  cmp    $0x3,%r12d
  jle    L126
L109:
  mov    (%rsp),%rbx
  mov    %r12d,%r14d
  nopl   0x0(%rax)
L136:
  mov    %rbx,%rdi
  mov    %r15d,%ecx
  mov    %r13d,%edx
  mov    %ebp,%esi
  call   <mmx16_blurcol_4@plt>
  sub    $0x4,%r14d
  add    $0x8,%rbx
  cmp    $0x3,%r14d
  jg     L136
  lea    -0x4(%r12),%ecx
  mov    $0x8,%esi
  mov    %ecx,%eax
  shr    $0x2,%eax
  lea    0x1(%rax),%edx
  shl    $0x3,%rdx
  cmp    $0x3,%r12d
  cmovle %rsi,%rdx
  neg    %eax
  add    %rdx,(%rsp)
  xor    %edx,%edx
  shl    $0x2,%eax
  cmp    $0x3,%r12d
  cmovle %edx,%eax
  lea    (%rax,%rcx,1),%r12d
L66:
  cmp    $0x1,%r12d
  jle    L114
L126:
  mov    (%rsp),%rbx
  mov    0xc(%rsp),%eax
  mov    %r15d,%ecx
  mov    %ebp,%esi
  sub    $0x2,%r12d
  lea    (%rax,%rax,1),%edx
  mov    %rbx,%rdi
  call   <mmx16_blurcol_2@plt>
  mov    %rbx,%rax
  add    $0x4,%rax
  mov    %rax,(%rsp)
L114:
  test   %r12d,%r12d
  je     L99
  mov    0xc(%rsp),%edx
  mov    (%rsp),%rdi
  add    $0x18,%rsp
  mov    %r15d,%ecx
  pop    %rbx
  mov    %ebp,%esi
  pop    %rbp
  add    %edx,%edx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    10b0 <mmx16_blurcol@plt>
  cs nopw 0x0(%rax,%rax,1)
L99:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nop
L31:
  mov    (%rsp),%rbx
  mov    %r15d,%ecx
  mov    %r13d,%edx
  mov    %ebp,%esi
  sub    $0x2,%r12d
  mov    %rbx,%rdi
  call   <mmx16_blurcol_2@plt>
  mov    %rbx,%rax
  add    $0x4,%rax
  mov    %rax,(%rsp)
  cmp    $0x3,%r12d
  jg     L109
  jmp    L66
  nopw   0x0(%rax,%rax,1)
L55:
  mov    (%rsp),%rdi
  mov    0xc(%rsp),%eax
  mov    %r15d,%ecx
  mov    %ebp,%esi
  sub    $0x1,%r12d
  lea    0x2(%rdi),%rbx
  lea    (%rax,%rax,1),%edx
  call   <mmx16_blurcol@plt>
  mov    %rbx,(%rsp)
  cmp    $0x1,%r12d
  jg     L78
  jmp    L114
```

assistant: ```c
void mmx_blur16(unsigned short *img, int width, int height, int step_width, int alpha32) {
  int row, col;
  int ii;
  for (row = 0; row < height; ++row)
    mmx16_blurrow(img + row * step_width, width, alpha32);
  if (width && (unsigned int)img & 0x2) {
    mmx16_blurcol(img++, height, step_width * 2, alpha32);
    width--;
  }
  if (width >= 2 && (unsigned int)img & 0x3) {
    mmx16_blurcol_2(img, height, step_width * 2, alpha32);
    img += 2;
    width -= 2;
  }
  while (width >= 4) {
    mmx16_blurcol_4(img, height, step_width * 2, alpha32);
    img += 4;
    width -= 4;
  }
  if (width >= 2) {
    mmx16_blurcol_2(img, height, step_width * 2, alpha32);
    img += 2;
    width -= 2;
  }
  if (width) {
    mmx16_blurcol(img, height, step_width * 2, alpha32);
    img += 1;
    width -= 1;
  }
}
```