user: 这段汇编代码用C语言表示是什么样的：

```asm
<__glTexImage2D_size>:
  endbr64
  mov    %edx,%r9d
  mov    %ecx,%r8d
  mov    $0x0,%eax
  or     %ecx,%edx
  js     L67
  cmp    $0x93,%edi
  je     L54
  jle    L73
  lea    -0x94(%rdi),%ecx
  cmp    $0xc,%ecx
  ja     L184
  mov    $0x1,%eax
  shl    %cl,%rax
  test   $0x8ab,%eax
  jne    L170
  test   $0x12,%ah
  jne    L284
  cmp    $0xa,%ecx
  je     L165
  mov    $0x0,%eax
  ret
L73:
  cmp    $0x91,%edi
  je     L185
  cmp    $0x92,%edi
  je     L60
  mov    $0x4,%eax
  cmp    $0x90,%edi
  jne    L63
L97:
  add    $0xffffff80,%esi
  cmp    $0x1a,%esi
  ja     L107
  mov    %esi,%esi
  lea    D7(%rip),%rcx
  movslq (%rcx,%rsi,4),%rdx
  add    %rcx,%rdx
  notrack jmp *%rdx
L63:
  mov    $0x0,%eax
  ret
L170:
  mov    $0x1,%eax
L287:
  add    $0xffffff80,%esi
  cmp    $0x1c,%esi
  ja     L99
  mov    %esi,%esi
  lea    D8(%rip),%rcx
  movslq (%rcx,%rsi,4),%rdx
  add    %rcx,%rdx
  notrack jmp *%rdx
L284:
  mov    $0x4,%eax
  jmp    L287
L165:
  mov    $0x3,%eax
  jmp    L287
  mov    $0x1,%edx
  jmp    L82
  mov    $0x0,%eax
  cmp    $0x99,%edi
  jne    L67
  lea    0xe(%r9),%eax
  add    $0x7,%r9d
  cmovns %r9d,%eax
  sar    $0x3,%eax
  imul   %r8d,%eax
  ret
  mov    $0x1,%edx
  mov    $0x1,%eax
  jmp    L82
  mov    $0x2,%eax
  mov    $0x2,%edx
  jmp    L82
  mov    $0x2,%eax
  mov    $0x4,%edx
  jmp    L82
  mov    $0x4,%edx
  mov    $0x1,%eax
  jmp    L82
  mov    $0x2,%edx
  mov    $0x1,%eax
  jmp    L82
  mov    $0x1,%edx
  mov    $0x2,%eax
  jmp    L82
  mov    $0x2,%edx
  mov    $0x1,%eax
L82:
  imul   %edx,%eax
  imul   %r9d,%eax
  imul   %r8d,%eax
  ret
L184:
  mov    $0x0,%eax
  ret
L99:
  mov    $0x0,%eax
  ret
L141:
  mov    $0x0,%eax
  ret
L107:
  mov    $0x0,%eax
  ret
L54:
  add    $0xffffff80,%esi
  cmp    $0x1a,%esi
  ja     L141
  mov    %esi,%esi
  lea    D6(%rip),%rdx
  movslq (%rdx,%rsi,4),%rax
  add    %rdx,%rax
  notrack jmp *%rax
  mov    $0x2,%edx
  mov    $0x1,%eax
  jmp    L82
  mov    $0x1,%edx
  mov    $0x1,%eax
  jmp    L82
  mov    $0x4,%edx
  mov    $0x1,%eax
  jmp    L82
L185:
  mov    $0x3,%eax
  jmp    L97
L60:
  mov    $0x1,%eax
  jmp    L97
  mov    $0x1,%edx
  mov    $0x1,%eax
  jmp    L82
  mov    $0x4,%edx
  mov    $0x1,%eax
  jmp    L82
L67:
  ret
```

assistant: ```c
GLint __glTexImage2D_size(GLenum format, GLenum type, GLsizei w, GLsizei h) {
  GLint elements, esize;
  if (w < 0)
    return 0;
  if (h < 0)
    return 0;
  switch (format) {
  case GL_COLOR_INDEX:
    elements = 1;
    break;
  case GL_RED:
  case GL_GREEN:
  case GL_BLUE:
  case GL_ALPHA:
  case GL_LUMINANCE:
  case GL_INTENSITY:
    elements = 1;
    break;
  case GL_LUMINANCE_ALPHA:
    elements = 2;
    break;
  case GL_RGB:
  case GL_BGR:
    elements = 3;
    break;
  case GL_RGBA:
  case GL_BGRA:
  case GL_ABGR_EXT:
    elements = 4;
    break;
  default:
    return 0;
  }
  switch (type) {
  case GL_BITMAP:
    if (format == GL_COLOR_INDEX) {
      return (h * ((w + 7) / 8));
    } else {
      return 0;
    }
  case GL_BYTE:
  case GL_UNSIGNED_BYTE:
    esize = 1;
    break;
  case GL_UNSIGNED_BYTE_3_3_2:
  case GL_UNSIGNED_BYTE_2_3_3_REV:
    esize = 1;
    elements = 1;
    break;
  case GL_SHORT:
  case GL_UNSIGNED_SHORT:
    esize = 2;
    break;
  case GL_UNSIGNED_SHORT_5_6_5:
  case GL_UNSIGNED_SHORT_5_6_5_REV:
  case GL_UNSIGNED_SHORT_4_4_4_4:
  case GL_UNSIGNED_SHORT_4_4_4_4_REV:
  case GL_UNSIGNED_SHORT_5_5_5_1:
  case GL_UNSIGNED_SHORT_1_5_5_5_REV:
    esize = 2;
    elements = 1;
    break;
  case GL_INT:
  case GL_UNSIGNED_INT:
  case GL_FLOAT:
    esize = 4;
    break;
  case GL_UNSIGNED_INT_8_8_8_8:
  case GL_UNSIGNED_INT_8_8_8_8_REV:
  case GL_UNSIGNED_INT_10_10_10_2:
  case GL_UNSIGNED_INT_2_10_10_10_REV:
    esize = 4;
    elements = 1;
    break;
  default:
    return 0;
  }
  return (elements * esize * w * h);
}
```