user: 下面的汇编指令对应的C源代码是什么:

```asm
<__glTexImage2D_size>:
  endbr64
  mov    %ecx,%r9d
  mov    %edx,%ecx
  xor    %eax,%eax
  mov    %edx,%r8d
  or     %r9d,%ecx
  js     L99
  cmp    $0x93,%edi
  je     L74
  jle    L72
  lea    -0x94(%rdi),%ecx
  cmp    $0xc,%ecx
  ja     L103
  mov    $0x1,%edx
  shl    %cl,%rdx
  test   $0x8ab,%edx
  jne    L193
  and    $0x12,%dh
  jne    L20
  cmp    $0xa,%ecx
  je     L186
L99:
  ret
  nopl   0x0(%rax,%rax,1)
L72:
  cmp    $0x91,%edi
  je     L92
  cmp    $0x92,%edi
  je     L42
  cmp    $0x90,%edi
  jne    L144
  mov    $0x8,%ecx
  mov    $0x10,%edx
  mov    $0x4,%r10d
L208:
  lea    -0x80(%rsi),%eax
  cmp    $0x1a,%eax
  ja     L199
  lea    D8(%rip),%rsi
  movslq (%rsi,%rax,4),%rax
  add    %rsi,%rax
  notrack jmp *%rax
  nopl   (%rax)
L193:
  mov    $0x2,%ecx
  mov    $0x4,%edx
  mov    $0x1,%r10d
L45:
  add    $0xffffff80,%esi
  cmp    $0x1c,%esi
  ja     L199
  lea    D5(%rip),%r11
  movslq (%r11,%rsi,4),%rax
  add    %r11,%rax
  notrack jmp *%rax
  nopl   (%rax)
  imul   %r10d,%r8d
L64:
  mov    %r9d,%eax
  imul   %r8d,%eax
  ret
  nopl   0x0(%rax)
L42:
  mov    $0x2,%ecx
  mov    $0x4,%edx
  mov    $0x1,%r10d
  jmp    L208
  nopw   0x0(%rax,%rax,1)
L144:
  ret
  nopl   0x0(%rax)
L92:
  mov    $0x6,%ecx
  mov    $0xc,%edx
  mov    $0x3,%r10d
  jmp    L208
  nopl   (%rax)
L74:
  mov    $0x4,%ecx
  mov    $0x8,%edx
  mov    $0x2,%r10d
  jmp    L208
  nopl   (%rax)
  add    %r8d,%r8d
  jmp    L64
  nopl   (%rax)
L199:
  xor    %eax,%eax
  ret
  nopl   0x0(%rax,%rax,1)
  shl    $0x2,%r8d
  jmp    L64
  xchg   %ax,%ax
L103:
  ret
  nopl   0x0(%rax)
  imul   %edx,%r8d
  jmp    L64
  nopl   0x0(%rax)
  imul   %ecx,%r8d
  jmp    L64
  nopl   0x0(%rax)
L20:
  mov    $0x8,%ecx
  mov    $0x10,%edx
  mov    $0x4,%r10d
  jmp    L45
  nopl   (%rax)
L186:
  mov    $0x6,%ecx
  mov    $0xc,%edx
  mov    $0x3,%r10d
  jmp    L45
  xor    %eax,%eax
  cmp    $0x99,%edi
  jne    L99
  lea    0x7(%r8),%eax
  sar    $0x3,%eax
  imul   %r9d,%eax
  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);
}
```