user: 请从给定的汇编指令推导出C源代码:

```asm
<iswt_input1>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %esi,-0x2c(%rbp)
  mov    %edx,-0x30(%rbp)
  mov    %rcx,-0x38(%rbp)
  mov    %r8d,-0x3c(%rbp)
  mov    %r9,-0x48(%rbp)
  mov    -0x2c(%rbp),%eax
  imul   -0x30(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x18(%rbp)
  mov    -0x2c(%rbp),%r8d
  mov    -0x30(%rbp),%edi
  mov    -0x18(%rbp),%rcx
  mov    -0x2c(%rbp),%edx
  mov    -0x30(%rbp),%esi
  mov    -0x28(%rbp),%rax
  mov    %r8d,%r9d
  mov    %edi,%r8d
  mov    %rax,%rdi
  call   <matrix_tran@plt>
  mov    -0x2c(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x30(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x30(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x1c(%rbp),%eax
  imul   -0x30(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  lea    (%rdx,%rax,1),%rdi
  mov    -0x30(%rbp),%ecx
  mov    -0x10(%rbp),%rdx
  mov    -0x30(%rbp),%eax
  mov    %eax,%esi
  call   <verbatim_copy@plt>
  movl   $0x0,-0x20(%rbp)
  jmp    L18
L13:
  mov    -0x1c(%rbp),%eax
  sub    -0x20(%rbp),%eax
  mov    %eax,%edi
  mov    -0x1c(%rbp),%eax
  sub    -0x20(%rbp),%eax
  sub    $0x1,%eax
  imul   -0x30(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  lea    (%rdx,%rax,1),%rsi
  mov    -0x48(%rbp),%r9
  mov    -0x30(%rbp),%r8d
  mov    -0x8(%rbp),%rcx
  mov    -0x30(%rbp),%edx
  mov    -0x10(%rbp),%rax
  sub    $0x8,%rsp
  push   %rdi
  mov    0x18(%rbp),%edi
  push   %rdi
  push   0x10(%rbp)
  mov    %rax,%rdi
  call   <iswt_conv_step@plt>
  add    $0x20,%rsp
  mov    -0x30(%rbp),%ecx
  mov    -0x10(%rbp),%rdx
  mov    -0x30(%rbp),%esi
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <verbatim_copy@plt>
  addl   $0x1,-0x20(%rbp)
L18:
  mov    -0x20(%rbp),%eax
  cmp    -0x1c(%rbp),%eax
  jl     L13
  mov    -0x30(%rbp),%ecx
  mov    -0x38(%rbp),%rdx
  mov    -0x30(%rbp),%esi
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <verbatim_copy@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  nop
  leave
  ret
```

assistant: ```c
void iswt_input1(double *matrixIn, int rowLength, int colLength, double *sigOut, int sigOutLength, double *filterLow, double *filterHi, int filterLength) {
  int step, count;
  double *approxTemp, *approxOut, *matrixInTemp;
  matrixInTemp = malloc(rowLength * colLength * sizeof(double));
  matrix_tran(matrixIn, colLength, rowLength, matrixInTemp, colLength, rowLength);
  step = rowLength - 1;
  approxTemp = malloc(colLength * sizeof(double));
  approxOut = malloc(colLength * sizeof(double));
  verbatim_copy(matrixInTemp + step * colLength, colLength, approxTemp, colLength);
  for (count = 0; count < step; count++) {
    iswt_conv_step(approxTemp, matrixInTemp + (step - count - 1) * colLength, colLength, approxOut, colLength, filterLow, filterHi, filterLength, step - count);
    verbatim_copy(approxOut, colLength, approxTemp, colLength);
  }
  verbatim_copy(approxTemp, colLength, sigOut, colLength);
  free(matrixInTemp);
  free(approxTemp);
  free(approxOut);
  return;
}
```