user: What would the C source look like for the assembly code provided here:

```asm
<newt_raph>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x838,%rsp
  mov    %rdi,0x28(%rsp)
  mov    %rsi,0x18(%rsp)
  mov    %edx,0x24(%rsp)
  mov    %fs:0x28,%rax
  mov    %rax,0x828(%rsp)
  xor    %eax,%eax
  lea    0x50(%rsp),%rax
  mov    %rax,0x38(%rsp)
  lea    -0x1(%rdx),%eax
  mov    %rax,0x30(%rsp)
  shl    $0x3,%rax
  lea    0x58(%rsp,%rax,1),%rdi
  mov    %rdi,0x40(%rsp)
  lea    0x1e0(%rsp),%rdi
  mov    %rdi,0x48(%rsp)
  lea    0x1e8(%rsp,%rax,1),%rax
  mov    %rax,0x10(%rsp)
  mov    $0xffffffeb,%r15d
  mov    $0xfffffff5,%r14d
  mov    $0x0,%r13d
  jmp    L199
L224:
  movsd  0x0(%rbp),%xmm1
  movsd  D104(%rip),%xmm0
  comisd %xmm1,%xmm0
  jbe    L96
  comisd D37(%rip),%xmm1
  jbe    L96
  movsd  D49(%rip),%xmm0
  mulsd  (%rbx),%xmm0
  addsd  %xmm1,%xmm0
  movsd  %xmm0,0x0(%rbp)
  jmp    L34
L222:
  movsd  0x0(%rbp),%xmm1
  movsd  D104(%rip),%xmm6
  comisd %xmm1,%xmm6
  jbe    L96
  comisd D37(%rip),%xmm1
  jbe    L96
  movsd  D55(%rip),%xmm0
  mulsd  (%rbx),%xmm0
  addsd  %xmm1,%xmm0
  movsd  %xmm0,0x0(%rbp)
  jmp    L34
L96:
  movsd  0x0(%rbp),%xmm0
  addsd  (%r12),%xmm0
  movsd  %xmm0,0x0(%rbp)
L34:
  add    $0x8,%rbx
  add    $0x8,%rbp
  cmp    0x10(%rsp),%rbx
  je     L161
L33:
  mov    %rbx,%r12
  movsd  (%rbx),%xmm0
  call   <fabs@plt>
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
  addsd  0x8(%rsp),%xmm0
  movsd  %xmm0,0x8(%rsp)
  cmp    $0x9,%r14d
  jbe    L224
  cmp    $0x27,%r15d
  jbe    L222
  cmp    $0x3c,%r13d
  jle    L96
  movsd  0x0(%rbp),%xmm0
  movsd  D104(%rip),%xmm4
  comisd %xmm0,%xmm4
  jbe    L96
  comisd D37(%rip),%xmm0
  jbe    L96
  movsd  (%rbx),%xmm1
  mulsd  D97(%rip),%xmm1
  addsd  %xmm0,%xmm1
  movsd  %xmm1,0x0(%rbp)
  jmp    L34
L161:
  movsd  D8(%rip),%xmm0
  comisd 0x8(%rsp),%xmm0
  jae    L201
  add    $0x1,%r13d
  add    $0x1,%r14d
  add    $0x1,%r15d
  cmp    $0x96,%r13d
  je     L2
L199:
  lea    0x50(%rsp),%rsi
  mov    $0xffffffff,%r8d
  mov    $0x0,%ecx
  mov    0x24(%rsp),%ebx
  mov    %ebx,%edx
  mov    0x18(%rsp),%rdi
  mov    $0x0,%eax
  mov    0x28(%rsp),%r10
  call   *%r10
  test   %ebx,%ebx
  jle    L12
  mov    0x38(%rsp),%rbx
  pxor   %xmm7,%xmm7
  movsd  %xmm7,0x8(%rsp)
  mov    0x40(%rsp),%rbp
L44:
  movsd  (%rbx),%xmm0
  call   <fabs@plt>
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
  addsd  0x8(%rsp),%xmm0
  movsd  %xmm0,0x8(%rsp)
  add    $0x8,%rbx
  cmp    %rbp,%rbx
  jne    L44
  movsd  D32(%rip),%xmm5
  comisd %xmm0,%xmm5
  jae    L42
  lea    0x500(%rsp),%rcx
  lea    0x370(%rsp),%rdx
  lea    0x50(%rsp),%rsi
  sub    $0x8,%rsp
  mov    0x2c(%rsp),%eax
  push   %rax
  mov    0x38(%rsp),%r9
  lea    0x6a0(%rsp),%r8
  mov    0x28(%rsp),%rdi
  call   <fdjac3@plt>
  add    $0x10,%rsp
  mov    $0x0,%eax
  mov    0x30(%rsp),%rcx
L29:
  movsd  0x50(%rsp,%rax,8),%xmm0
  xorpd  D64(%rip),%xmm0
  movsd  %xmm0,0x1e0(%rsp,%rax,8)
  mov    %rax,%rdx
  add    $0x1,%rax
  cmp    %rcx,%rdx
  jne    L29
  lea    0x1e0(%rsp),%rcx
  lea    0x690(%rsp),%rdx
  lea    0x500(%rsp),%rsi
  lea    0x370(%rsp),%rdi
  mov    0x24(%rsp),%r8d
  call   <tridiag@plt>
  mov    0x18(%rsp),%rbp
  mov    0x48(%rsp),%rbx
  pxor   %xmm5,%xmm5
  movsd  %xmm5,0x8(%rsp)
  jmp    L33
L2:
  mov    $0x1,%eax
  jmp    L51
L12:
  mov    $0x0,%eax
L51:
  mov    0x828(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L176
  add    $0x838,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L42:
  mov    $0x0,%eax
  jmp    L51
L201:
  mov    $0x0,%eax
  jmp    L51
L176:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: parse_data
arguments: data_label: D104
type: f64
name: parse_data
arguments: data_label: D37
type: f32[4]
name: parse_data
arguments: data_label: D49
type: f64
name: parse_data
arguments: data_label: D55
type: f64
name: parse_data
arguments: data_label: D97
type: f64
name: parse_data
arguments: data_label: D8
type: byte[8]
name: parse_data
arguments: data_label: D32
type: byte[8]
name: parse_data
arguments: data_label: D64
type: f32[4]

tool: D104: 2

tool: {"D37": [0.0,-2.3125,-107374184.0,1.8499999046325684]}

tool: D49: 0.9

tool: D55: 0.7

tool: D97: 0.2

tool: {"D8": [0x2d,0x43,0x1c,0xeb,0xe2,0x36,0x1a,0x3f]}

tool: {"D32": [0x9a,0x99,0x99,0x99,0x99,0x99,0xb9,0x3f]}

tool: {"D64": [0.0,-0.0,0.0,0.0]}

assistant: ```c
int newt_raph(void (*vecfunc)(double x[], double fvec[], int n, int init, ...), double x[], int n) {
  int k, i, index[50], Error;
  double errx, errf, d, fvec[50], fjac[50 * 50], p[50];
  double a[50], b[50], c[50];
  Error = 0;
  for (k = 0; k < 150; k++) {
    (*vecfunc)(x, fvec, n, 0, -1);
    errf = 0.0;
    for (i = 0; i < n; i++)
      errf += fabs(fvec[i]);
    if (errf <= 1e-1) {
      return (Error);
    }
    fdjac3(x, fvec, a, b, c, vecfunc, n);
    for (i = 0; i < n; i++)
      p[i] = -fvec[i];
    tridiag(a, b, c, p, n);
    errx = 0.0;
    for (i = 0; i < n; i++) {
      errx += fabs(p[i]);
      if (k > 10 && k <= 20 && x[i] < 2.0 && x[i] > -5.0)
        x[i] += p[i] * 0.9;
      else if (k > 20 && k <= 60 && x[i] < 2.0 && x[i] > -5.0)
        x[i] += p[i] * 0.7;
      else if (k > 60 && x[i] < 2.0 && x[i] > -5.0)
        x[i] += p[i] * 0.2;
      else
        x[i] += p[i];
    }
    if (errx <= 1e-4) {
      return (Error);
    }
  }
  Error = 1;
  return (Error);
}
```