user: 请从给定的汇编指令推导出C源代码:

```asm
<slfit>:
  endbr64
  push   %r15
  mov    %r9d,%r15d
  push   %r14
  mov    %rdx,%r14
  push   %r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  push   %rbx
  mov    %ecx,%ebx
  sub    $0x18,%rsp
  mov    0x58(%rsp),%r13
  mov    0x50(%rsp),%rbp
  movl   $0x0,0x0(%r13)
  test   %ecx,%ecx
  jle    L2
  movss  D5(%rip),%xmm2
  movslq %ecx,%rcx
  xor    %eax,%eax
  nopl   0x0(%rax)
L75:
  movss  (%rsi,%rax,4),%xmm0
  movss  %xmm0,(%r14,%rax,4)
  movss  (%r8,%rax,4),%xmm1
  ucomiss D14(%rip),%xmm1
  jp     L126
  jne    L126
  mulss  %xmm2,%xmm0
  xor    %r15d,%r15d
  movss  %xmm0,(%r14,%rax,4)
L126:
  add    $0x1,%rax
  cmp    %rax,%rcx
  jne    L75
  test   %r15d,%r15d
  je     L41
  pxor   %xmm5,%xmm5
  movss  D19(%rip),%xmm7
  xor    %eax,%eax
  movaps %xmm5,%xmm3
  movaps %xmm5,%xmm4
  nopw   0x0(%rax,%rax,1)
L125:
  movss  (%r8,%rax,4),%xmm0
  movaps %xmm0,%xmm1
  mulss  %xmm0,%xmm1
  movaps %xmm7,%xmm0
  divss  %xmm1,%xmm0
  movss  (%r12,%rax,4),%xmm1
  addss  %xmm0,%xmm5
  mulss  %xmm0,%xmm1
  mulss  (%r14,%rax,4),%xmm0
  add    $0x1,%rax
  addss  %xmm1,%xmm4
  addss  %xmm0,%xmm3
  cmp    %rax,%rcx
  jne    L125
  movaps %xmm4,%xmm9
  movss  0x0(%r13),%xmm1
  xor    %eax,%eax
  pxor   %xmm6,%xmm6
  divss  %xmm5,%xmm9
  xchg   %ax,%ax
L84:
  movss  (%r12,%rax,4),%xmm0
  movss  (%r8,%rax,4),%xmm8
  movss  (%r14,%rax,4),%xmm2
  add    $0x1,%rax
  subss  %xmm9,%xmm0
  divss  %xmm8,%xmm2
  divss  %xmm8,%xmm0
  mulss  %xmm0,%xmm2
  mulss  %xmm0,%xmm0
  addss  %xmm2,%xmm1
  addss  %xmm0,%xmm6
  movss  %xmm1,0x0(%r13)
  cmp    %rax,%rcx
  jne    L84
  movaps %xmm4,%xmm0
  movaps %xmm5,%xmm2
  pxor   %xmm8,%xmm8
  mulss  %xmm4,%xmm0
  cvtss2sd %xmm5,%xmm8
  mulss  %xmm6,%xmm2
  jmp    L167
  nopl   (%rax)
L41:
  pxor   %xmm5,%xmm5
  pxor   %xmm3,%xmm3
  movss  0x0(%r13),%xmm1
  xor    %eax,%eax
  cvtsi2ss %ebx,%xmm5
  pxor   %xmm8,%xmm8
  movaps %xmm3,%xmm4
  cvtss2sd %xmm5,%xmm8
  nopl   0x0(%rax)
L150:
  addss  (%r12,%rax,4),%xmm4
  addss  (%r14,%rax,4),%xmm3
  add    $0x1,%rax
  cmp    %rax,%rcx
  jne    L150
  movaps %xmm4,%xmm7
  xor    %eax,%eax
  pxor   %xmm6,%xmm6
  divss  %xmm5,%xmm7
  nopw   0x0(%rax,%rax,1)
L19:
  movss  (%r12,%rax,4),%xmm0
  subss  %xmm7,%xmm0
  movaps %xmm0,%xmm2
  mulss  %xmm0,%xmm2
  mulss  (%r14,%rax,4),%xmm0
  add    $0x1,%rax
  addss  %xmm2,%xmm6
  addss  %xmm0,%xmm1
  movss  %xmm1,0x0(%r13)
  cmp    %rax,%rcx
  jne    L19
  movaps %xmm4,%xmm0
  movaps %xmm6,%xmm2
  movss  D19(%rip),%xmm7
  mulss  %xmm4,%xmm0
  mulss  %xmm5,%xmm2
L167:
  divss  %xmm2,%xmm0
  movss  %xmm7,0xc(%rsp)
  movss  %xmm6,(%rsp)
  divss  %xmm6,%xmm1
  cvtss2sd %xmm0,%xmm0
  addsd  D43(%rip),%xmm0
  divsd  %xmm8,%xmm0
  movss  %xmm1,0x0(%r13)
  mulss  %xmm4,%xmm1
  subss  %xmm1,%xmm3
  divss  %xmm5,%xmm3
  cvtsd2ss %xmm0,%xmm0
  movss  %xmm3,0x0(%rbp)
  call   <sqrt@plt>
  movss  0xc(%rsp),%xmm7
  movss  (%rsp),%xmm6
  mov    0x60(%rsp),%rax
  divss  %xmm6,%xmm7
  movss  %xmm0,(%rax)
  movaps %xmm7,%xmm0
  call   <sqrt@plt>
  mov    0x68(%rsp),%rax
  movss  %xmm0,(%rax)
  test   %r15d,%r15d
  jne    L91
  test   %ebx,%ebx
  jle    L136
  movslq %ebx,%rax
  xor    %r15d,%r15d
  pxor   %xmm0,%xmm0
  mov    %rax,(%rsp)
L39:
  movss  0x0(%r13),%xmm2
  mulss  (%r12,%r15,4),%xmm2
  mov    $0x2,%edi
  movss  (%r14,%r15,4),%xmm1
  subss  0x0(%rbp),%xmm1
  add    $0x1,%r15
  subss  %xmm2,%xmm1
  addss  %xmm1,%xmm0
  call   <pow@plt>
  cmp    %r15,(%rsp)
  jne    L39
  pxor   %xmm1,%xmm1
  cmp    $0x2,%ebx
  jle    L88
  sub    $0x2,%ebx
  pxor   %xmm1,%xmm1
  cvtsi2ss %ebx,%xmm1
  divss  %xmm1,%xmm0
  call   <sqrt@plt>
  movaps %xmm0,%xmm1
L88:
  mov    0x60(%rsp),%rax
  movss  (%rax),%xmm0
  mulss  %xmm1,%xmm0
  movss  %xmm0,(%rax)
  mov    0x68(%rsp),%rax
  mulss  (%rax),%xmm1
  movss  %xmm1,(%rax)
L91:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L2:
  test   %r9d,%r9d
  je     L151
  pxor   %xmm2,%xmm2
  movss  D19(%rip),%xmm7
  pxor   %xmm8,%xmm8
  movaps %xmm2,%xmm0
  movaps %xmm2,%xmm1
  movaps %xmm2,%xmm5
  movaps %xmm2,%xmm3
  movaps %xmm2,%xmm4
  movaps %xmm2,%xmm6
  jmp    L167
L136:
  pxor   %xmm1,%xmm1
  jmp    L88
L151:
  pxor   %xmm5,%xmm5
  pxor   %xmm0,%xmm0
  pxor   %xmm2,%xmm2
  movss  D19(%rip),%xmm7
  cvtsi2ss %ecx,%xmm5
  pxor   %xmm8,%xmm8
  movaps %xmm0,%xmm1
  movaps %xmm0,%xmm3
  movaps %xmm0,%xmm4
  movaps %xmm0,%xmm6
  mulss  %xmm5,%xmm2
  cvtss2sd %xmm5,%xmm8
  jmp    L167
```

tool_calls: name: parse_data
arguments: label: D5
type_guessed: f32
name: parse_data
arguments: label: D14
type_guessed: byte[4]
name: parse_data
arguments: label: D19
type_guessed: f32
name: parse_data
arguments: label: D43
type_guessed: f32[2]

tool: D5: 0.75

tool: {"D14": [0x00,0xc0,0x79,0xc4]}

tool: D19: 1

tool: {"D43": [0.0,1.875]}

assistant: ```c
void slfit(float *x, float *y, float *z, int ndata, float *sig, int weight, float *a, float *b, float *siga, float *sigb) {
  float sx = .0f;
  float sy = .0f;
  float st2 = .0f;
  float ss = .0f;
  *b = .0f;
  int q = 0;
  float sigdat = 0.0f;
  float t = 0.0f;
  float wt = 0.0f;
  float chi2 = 0.0f;
  float sxoss = 0.0f;
  int useweight = weight;
  int i = 0;
  for (i = 0; i < ndata; i++) {
    *(z + i) = *(y + i);
    if (*(sig + i) == -999.0) {
      useweight = 0;
      *(z + i) = 0.75 * (*(y + i));
    }
  }
  if (useweight) {
    for (i = 0; i < ndata; i++) {
      wt = 1.0 / (*(sig + i) * (*(sig + i)));
      ss = ss + wt;
      sx = sx + *(x + i) * wt;
      sy = sy + *(z + i) * wt;
    }
  } else {
    for (i = 0; i < ndata; i++) {
      sx = sx + *(x + i);
      sy = sy + *(z + i);
    }
    ss = (float)ndata;
  }
  sxoss = sx / ss;
  if (useweight) {
    for (i = 0; i < ndata; i++) {
      t = (*(x + i) - sxoss) / *(sig + i);
      *b = *b + t * (*(z + i) / *(sig + i));
      st2 = st2 + t * t;
    }
  } else {
    for (i = 0; i < ndata; i++) {
      t = (*(x + i) - sxoss);
      st2 = st2 + t * t;
      *b = *b + t * (*(z + i));
    }
  }
  *b = *b / st2;
  *a = (sy - sx * (*b)) / ss;
  *siga = sqrt((1.0 + sx * sx / (ss * st2)) / ss);
  *sigb = sqrt(1.0 / st2);
  chi2 = 0.0;
  if (!useweight) {
    for (i = 0; i < ndata; i++) {
      chi2 = pow((chi2 + ((*(z + i)) - *a - *b * (*(x + i)))), 2);
    }
    q = 1;
    sigdat = 0.0f;
    if (ndata > 2)
      sigdat = sqrt(chi2 / (ndata - 2));
    *siga = *siga * sigdat;
    *sigb = *sigb * sigdat;
  }
}
```