user: What is the c source code of the assembly code below:

```asm
<ux00ddr_phy_fixup>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x48(%rbp)
  mov    -0x48(%rbp),%rax
  add    $0x2000,%rax
  mov    %rax,-0x8(%rbp)
  movl   $0x0,-0x3c(%rbp)
  movl   $0x0,-0x38(%rbp)
  movl   $0x0,-0x34(%rbp)
  movl   $0x0,-0x30(%rbp)
  jmp    L89
L156:
  mov    -0x38(%rbp),%eax
  add    $0x22,%eax
  mov    %eax,-0x20(%rbp)
  movl   $0x0,-0x2c(%rbp)
  jmp    L19
L36:
  mov    -0x20(%rbp),%edx
  mov    -0x2c(%rbp),%eax
  add    %edx,%eax
  shl    $0x2,%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x1c(%rbp)
  movl   $0x0,-0x28(%rbp)
  jmp    L134
L54:
  cmpl   $0x0,-0x28(%rbp)
  jne    L97
  movl   $0x0,-0x24(%rbp)
  jmp    L81
L97:
  movl   $0x10,-0x24(%rbp)
L81:
  mov    -0x24(%rbp),%eax
  mov    -0x1c(%rbp),%edx
  mov    %eax,%ecx
  sar    %cl,%edx
  mov    %edx,%eax
  and    $0x3f,%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x24(%rbp),%eax
  add    $0x6,%eax
  mov    -0x1c(%rbp),%edx
  mov    %eax,%ecx
  sar    %cl,%edx
  mov    %edx,%eax
  and    $0x3f,%eax
  mov    %eax,-0x14(%rbp)
  cmpl   $0x0,-0x18(%rbp)
  jne    L98
  cmpl   $0x3f,-0x14(%rbp)
  jne    L98
  mov    $0x1,%eax
  jmp    L45
L98:
  mov    $0x0,%eax
L45:
  mov    %eax,-0x10(%rbp)
  cmpl   $0x0,-0x14(%rbp)
  jne    L78
  cmpl   $0x3f,-0x18(%rbp)
  jne    L78
  mov    $0x1,%eax
  jmp    L133
L78:
  mov    $0x0,%eax
L133:
  mov    %eax,-0xc(%rbp)
  cmpl   $0x0,-0x10(%rbp)
  jne    L91
  cmpl   $0x0,-0xc(%rbp)
  je     L73
L91:
  mov    -0x34(%rbp),%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%edx
  mov    %edx,%eax
  or     %eax,-0x3c(%rbp)
  movb   $0x30,-0x3e(%rbp)
  movb   $0x30,-0x3d(%rbp)
  mov    -0x34(%rbp),%edx
  movslq %edx,%rax
  imul   $0x66666667,%rax,%rax
  shr    $0x20,%rax
  sar    $0x2,%eax
  mov    %edx,%esi
  sar    $0x1f,%esi
  sub    %esi,%eax
  mov    %eax,%ecx
  mov    %ecx,%eax
  shl    $0x2,%eax
  add    %ecx,%eax
  add    %eax,%eax
  mov    %edx,%ecx
  sub    %eax,%ecx
  mov    %ecx,%edx
  movzbl -0x3e(%rbp),%eax
  add    %edx,%eax
  mov    %al,-0x3e(%rbp)
  mov    -0x34(%rbp),%eax
  movslq %eax,%rdx
  imul   $0x66666667,%rdx,%rdx
  shr    $0x20,%rdx
  sar    $0x2,%edx
  sar    $0x1f,%eax
  mov    %eax,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  mov    %eax,%edx
  movzbl -0x3d(%rbp),%eax
  add    %edx,%eax
  mov    %al,-0x3d(%rbp)
L73:
  addl   $0x1,-0x34(%rbp)
  addl   $0x1,-0x28(%rbp)
L134:
  cmpl   $0x1,-0x28(%rbp)
  jle    L54
  addl   $0x1,-0x2c(%rbp)
L19:
  cmpl   $0x3,-0x2c(%rbp)
  jle    L36
  subl   $0xffffff80,-0x38(%rbp)
  addl   $0x1,-0x30(%rbp)
L89:
  cmpl   $0x7,-0x30(%rbp)
  jle    L156
  mov    $0x0,%eax
  pop    %rbp
  ret
```

assistant: ```c
uint64_t ux00ddr_phy_fixup(size_t ahbregaddr) {
  size_t ddrphyreg = ahbregaddr + 0x2000;
  uint64_t fails = 0;
  uint32_t slicebase = 0;
  uint32_t dq = 0;
  for (uint32_t slice = 0; slice < 8; slice++) {
    uint32_t regbase = slicebase + 34;
    for (uint32_t reg = 0; reg < 4; reg++) {
      uint32_t updownreg = (*(volatile uint32_t *)(((regbase + reg) << 2) + (ddrphyreg)));
      for (uint32_t bit = 0; bit < 2; bit++) {
        uint32_t phy_rx_cal_dqn_0_offset;
        if (bit == 0) {
          phy_rx_cal_dqn_0_offset = 0;
        } else {
          phy_rx_cal_dqn_0_offset = 16;
        }
        uint32_t down = (updownreg >> phy_rx_cal_dqn_0_offset) & 0x3F;
        uint32_t up = (updownreg >> (phy_rx_cal_dqn_0_offset + 6)) & 0x3F;
        uint8_t failc0 = ((down == 0) && (up == 0x3F));
        uint8_t failc1 = ((up == 0) && (down == 0x3F));
        if (failc0 || failc1) {
          fails |= (1 << dq);
          char slicelsc = '0';
          char slicemsc = '0';
          slicelsc += (dq % 10);
          slicemsc += (dq / 10);
        }
        dq++;
      }
    }
    slicebase += 128;
  }
  return (0);
}
```