user: 这段汇编代码用C语言表示是什么样的:

```asm
<fastBlur>:
  endbr64
  push   %r15
  mov    %esi,%r11d
  mov    %ecx,%esi
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  mov    %rdi,%rbp
  mov    %edx,%edi
  push   %rbx
  cmp    $0x1,%ecx
  je     L402
  cmp    $0x3,%ecx
  jne    L428
  mov    $0x1,%eax
  mov    $0x2,%ecx
L265:
  lea    -0x2(%r11),%r15d
  mov    %r15d,%r12d
  cmp    $0x3f,%esi
  je     L100
  cmp    $0x7f,%esi
  je     L16
  test   %eax,%eax
  jne    L34
  cmp    $0x1,%r11d
  jle    L400
  lea    -0x1(%r11),%r13d
  xor    %ebx,%ebx
  lea    0x1(%rsi),%r9d
  movslq %r11d,%r10
  lea    0x1(%rbp),%r14
L43:
  lea    (%r14,%rbx,1),%rcx
  xor    %r8d,%r8d
  test   %edi,%edi
  jle    L318
  nopl   0x0(%rax,%rax,1)
L315:
  movzbl -0x1(%rcx),%eax
  movzbl (%rcx),%edx
  add    $0x1,%r8d
  imul   %esi,%eax
  add    %edx,%eax
  cltd
  idiv   %r9d
  mov    %al,(%rcx)
  add    %r10,%rcx
  cmp    %r8d,%edi
  jne    L315
L318:
  add    $0x1,%rbx
  cmp    %rbx,%r13
  jne    L43
L67:
  movslq %r15d,%rbx
  lea    0x1(%rsi),%r9d
  movslq %r11d,%r10
  add    %rbp,%rbx
  nopl   0x0(%rax)
L365:
  mov    %rbx,%rcx
  xor    %r8d,%r8d
  test   %edi,%edi
  jle    L188
  nopw   0x0(%rax,%rax,1)
L470:
  movzbl 0x1(%rcx),%eax
  movzbl (%rcx),%edx
  add    $0x1,%r8d
  imul   %esi,%eax
  add    %edx,%eax
  cltd
  idiv   %r9d
  mov    %al,(%rcx)
  add    %r10,%rcx
  cmp    %r8d,%edi
  jne    L470
L188:
  sub    $0x1,%r12d
  sub    $0x1,%rbx
  cmp    $0xffffffff,%r12d
  jne    L365
L258:
  test   %r11d,%r11d
  jle    L205
  mov    %r11d,%r13d
  movslq %r11d,%r12
  lea    0x1(%rsi),%r9d
  xor    %r10d,%r10d
  neg    %r13d
  lea    0x0(%rbp,%r12,1),%r14
  xchg   %ax,%ax
L412:
  lea    (%r14,%r10,1),%rcx
  mov    $0x1,%r8d
  movslq %r13d,%rbx
  cmp    $0x1,%edi
  jle    L344
  nopw   0x0(%rax,%rax,1)
L399:
  mov    %rcx,%rax
  movzbl (%rcx),%edx
  add    $0x1,%r8d
  sub    %r10,%rax
  movzbl (%rax,%rbx,1),%eax
  imul   %esi,%eax
  add    %edx,%eax
  cltd
  idiv   %r9d
  mov    %al,(%rcx)
  add    %r12,%rcx
  cmp    %r8d,%edi
  jne    L399
L344:
  add    $0x1,%r10
  add    $0x1,%r13d
  jne    L412
L205:
  sub    $0x2,%edi
  js     L346
  mov    %edi,%ebx
  lea    -0x1(%r11),%eax
  lea    0x1(%rsi),%r8d
  movslq %r11d,%r10
  imul   %r11d,%ebx
  lea    0x1(%rbp,%rax,1),%r12
  nopl   0x0(%rax)
L72:
  movslq %ebx,%r9
  lea    0x0(%rbp,%r9,1),%rcx
  add    %r12,%r9
  test   %r11d,%r11d
  jle    L204
  nopl   0x0(%rax,%rax,1)
L433:
  movzbl (%rcx,%r10,1),%eax
  movzbl (%rcx),%edx
  add    $0x1,%rcx
  imul   %esi,%eax
  add    %edx,%eax
  cltd
  idiv   %r8d
  mov    %al,-0x1(%rcx)
  cmp    %rcx,%r9
  jne    L433
L204:
  sub    $0x1,%edi
  sub    %r11d,%ebx
  cmp    $0xffffffff,%edi
  jne    L72
L346:
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L428:
  cmp    $0x7,%ecx
  jne    L81
  mov    $0x3,%ecx
  lea    -0x2(%r11),%r15d
L34:
  mov    %r15d,%r9d
  cmp    $0x1,%r11d
  jle    L128
  lea    -0x1(%r11),%r13d
  xor    %ebx,%ebx
  lea    0x1(%rbp),%r12
  movslq %r11d,%r10
  nop
L278:
  lea    (%r12,%rbx,1),%rdx
  xor    %r8d,%r8d
  test   %edi,%edi
  jle    L293
  nopl   0x0(%rax,%rax,1)
L164:
  movzbl -0x1(%rdx),%eax
  movzbl (%rdx),%r14d
  add    $0x1,%r8d
  imul   %esi,%eax
  add    %r14d,%eax
  sar    %cl,%eax
  mov    %al,(%rdx)
  add    %r10,%rdx
  cmp    %r8d,%edi
  jne    L164
L293:
  add    $0x1,%rbx
  cmp    %rbx,%r13
  jne    L278
L380:
  movslq %r15d,%rbx
  movslq %r11d,%r10
  add    %rbp,%rbx
L124:
  mov    %rbx,%rdx
  xor    %r8d,%r8d
  test   %edi,%edi
  jle    L455
  nopw   0x0(%rax,%rax,1)
L38:
  movzbl 0x1(%rdx),%eax
  movzbl (%rdx),%r12d
  add    $0x1,%r8d
  imul   %esi,%eax
  add    %r12d,%eax
  sar    %cl,%eax
  mov    %al,(%rdx)
  add    %r10,%rdx
  cmp    %r8d,%edi
  jne    L38
L455:
  sub    $0x1,%r9d
  sub    $0x1,%rbx
  cmp    $0xffffffff,%r9d
  jne    L124
L48:
  test   %r11d,%r11d
  jle    L294
  mov    %r11d,%r12d
  movslq %r11d,%rbx
  xor    %r9d,%r9d
  neg    %r12d
  lea    0x0(%rbp,%rbx,1),%r13
  nopw   0x0(%rax,%rax,1)
L360:
  lea    0x0(%r13,%r9,1),%rdx
  mov    $0x1,%r8d
  movslq %r12d,%r10
  cmp    $0x1,%edi
  jle    L472
  nopl   0x0(%rax,%rax,1)
L110:
  mov    %rdx,%rax
  movzbl (%rdx),%r14d
  add    $0x1,%r8d
  sub    %r9,%rax
  movzbl (%rax,%r10,1),%eax
  imul   %esi,%eax
  add    %r14d,%eax
  sar    %cl,%eax
  mov    %al,(%rdx)
  add    %rbx,%rdx
  cmp    %r8d,%edi
  jne    L110
L472:
  add    $0x1,%r9
  add    $0x1,%r12d
  jne    L360
L294:
  sub    $0x2,%edi
  js     L346
  mov    %edi,%r10d
  lea    -0x1(%r11),%eax
  movslq %r11d,%r9
  imul   %r11d,%r10d
  lea    0x1(%rbp,%rax,1),%rbx
  nopl   0x0(%rax,%rax,1)
L275:
  movslq %r10d,%r8
  lea    0x0(%rbp,%r8,1),%rdx
  add    %rbx,%r8
  test   %r11d,%r11d
  jle    L125
L272:
  movzbl (%rdx,%r9,1),%eax
  movzbl (%rdx),%r12d
  add    $0x1,%rdx
  imul   %esi,%eax
  add    %r12d,%eax
  sar    %cl,%eax
  mov    %al,-0x1(%rdx)
  cmp    %r8,%rdx
  jne    L272
L125:
  sub    $0x1,%edi
  sub    %r11d,%r10d
  cmp    $0xffffffff,%edi
  jne    L275
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L81:
  cmp    $0xf,%ecx
  jne    L476
  mov    $0x4,%ecx
  lea    -0x2(%r11),%r15d
  jmp    L34
L402:
  mov    $0x1,%eax
  mov    $0x1,%ecx
  jmp    L265
L476:
  cmp    $0x1f,%ecx
  jne    L131
  mov    $0x5,%ecx
  lea    -0x2(%r11),%r15d
  jmp    L34
L128:
  test   %r15d,%r15d
  js     L48
  jmp    L380
  cs nopw 0x0(%rax,%rax,1)
L400:
  test   %r15d,%r15d
  js     L258
  jmp    L67
L16:
  mov    $0x7,%ecx
  jmp    L34
L131:
  xor    %eax,%eax
  xor    %ecx,%ecx
  jmp    L265
L100:
  mov    $0x6,%ecx
  jmp    L34
```

assistant: ```c
void fastBlur(unsigned char *img, int w, int h, int size) {
  int x, y;
  int m = size;
  int divZ = 0;
  int canFastDiv = 0;
  if (size == 1)
    divZ = 1, canFastDiv = 1;
  if (size == 3)
    divZ = 2, canFastDiv = 1;
  if (size == 7)
    divZ = 3, canFastDiv = 1;
  if (size == 15)
    divZ = 4, canFastDiv = 1;
  if (size == 31)
    divZ = 5, canFastDiv = 1;
  if (size == 63)
    divZ = 6, canFastDiv = 1;
  if (size == 127)
    divZ = 7, canFastDiv = 1;
  if (canFastDiv) {
    for (x = 1; x < w; x++)
      for (y = 0; y < h; y++)
        img[x + w * y] = (m * img[x - 1 + w * y] + img[x + w * y]) >> divZ;
    for (x = w - 2; x >= 0; x--)
      for (y = 0; y < h; y++)
        img[x + w * y] = (m * img[x + 1 + w * y] + img[x + w * y]) >> divZ;
    for (x = 0; x < w; x++)
      for (y = 1; y < h; y++)
        img[x + w * y] = (m * img[x - w + w * y] + img[x + w * y]) >> divZ;
    for (y = h - 2; y >= 0; y--)
      for (x = 0; x < w; x++)
        img[x + w * y] = (m * img[x + w + w * y] + img[x + w * y]) >> divZ;
    return;
  }
  for (x = 1; x < w; x++)
    for (y = 0; y < h; y++)
      img[x + w * y] = (m * img[x - 1 + w * y] + img[x + w * y]) / (m + 1);
  for (x = w - 2; x >= 0; x--)
    for (y = 0; y < h; y++)
      img[x + w * y] = (m * img[x + 1 + w * y] + img[x + w * y]) / (m + 1);
  for (x = 0; x < w; x++)
    for (y = 1; y < h; y++)
      img[x + w * y] = (m * img[x - w + w * y] + img[x + w * y]) / (m + 1);
  for (y = h - 2; y >= 0; y--)
    for (x = 0; x < w; x++)
      img[x + w * y] = (m * img[x + w + w * y] + img[x + w * y]) / (m + 1);
}
```