user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<benchmark>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x28,%rsp
  mov    %edi,%r14d
  mov    %esi,-0x44(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  mov    %esi,%eax
  cltq
  shl    $0x2,%rax
  lea    0xf(%rax),%rdx
  mov    %rdx,%rsi
  and    $0xfffffffffffffff0,%rsi
  and    $0xfffffffffffff000,%rdx
  mov    %rsp,%rcx
  sub    %rdx,%rcx
L99:
  cmp    %rcx,%rsp
  je     L122
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L99
L122:
  mov    %rsi,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  je     L72
  orq    $0x0,-0x8(%rsp,%rdx,1)
L72:
  mov    %rsp,%r13
  add    $0xf,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffffff0,%rcx
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%rdx
  sub    %rax,%rdx
L80:
  cmp    %rdx,%rsp
  je     L143
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L80
L143:
  mov    %rcx,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  test   %rax,%rax
  je     L63
  orq    $0x0,-0x8(%rsp,%rax,1)
L63:
  lea    0x3(%rsp),%r12
  mov    %r12,%rax
  shr    $0x2,%rax
  mov    %rax,-0x50(%rbp)
  and    $0xfffffffffffffffc,%r12
  mov    -0x44(%rbp),%eax
  test   %eax,%eax
  jle    L87
  mov    %eax,%r15d
  mov    $0x0,%ebx
L117:
  mov    $0x0,%eax
  call   <rand_float@plt>
  mulss  D2(%rip),%xmm0
  subss  D58(%rip),%xmm0
  movss  %xmm0,0x0(%r13,%rbx,4)
  mov    $0x0,%eax
  call   <rand_float@plt>
  mulss  D24(%rip),%xmm0
  subss  D30(%rip),%xmm0
  movss  %xmm0,(%r12,%rbx,4)
  add    $0x1,%rbx
  cmp    %r15,%rbx
  jne    L117
L87:
  mov    $0x0,%eax
  call   <tic@plt>
  movq   %xmm0,%r15
  test   %r14d,%r14d
  jle    L133
  mov    $0x0,%ebx
L115:
  mov    $0x1,%r8d
  mov    %r12,%rcx
  mov    $0x1,%edx
  mov    %r13,%rsi
  movss  D0(%rip),%xmm0
  mov    -0x44(%rbp),%edi
  call   <c_saxpy@plt>
  movss  (%r12),%xmm0
  ucomiss %xmm0,%xmm0
  jp     L84
  add    $0x1,%ebx
  cmp    %ebx,%r14d
  jne    L115
  jmp    L133
L84:
  lea    D51(%rip),%rdi
  call   <printf@plt>
L133:
  mov    $0x0,%eax
  call   <tic@plt>
  movq   %r15,%xmm1
  subsd  %xmm1,%xmm0
  movq   %xmm0,%rbx
  mov    -0x50(%rbp),%rax
  movss  0x0(,%rax,4),%xmm0
  ucomiss %xmm0,%xmm0
  jp     L114
L128:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L3
  movq   %rbx,%xmm0
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L114:
  lea    D51(%rip),%rdi
  call   <printf@plt>
  jmp    L128
L3:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D2
type_infered: byte[4]
name: extract_symbolic_data
arguments: data_label: D58
type_infered: byte[4]
name: extract_symbolic_data
arguments: data_label: D24
type_infered: byte[4]
name: extract_symbolic_data
arguments: data_label: D30
type_infered: byte[4]
name: extract_symbolic_data
arguments: data_label: D0
type_infered: byte[4]
name: extract_symbolic_data
arguments: data_label: D51
type_infered: string

tool: {"D2": [0x00,0x00,0xc8,0x42]}

tool: {"D58": [0x00,0x00,0x48,0x43]}

tool: {"D24": [0x00,0x40,0x1c,0x46]}

tool: {"D30": [0x00,0x40,0x9c,0x46]}

tool: {"D0": [0x00,0x00,0xa0,0x40]}

tool: D51: should not return NaN


assistant: ```c
double benchmark(int iterations, int len) {
  double elapsed;
  float x[len];
  float y[len];
  double t;
  int i;
  for (i = 0; i < len; i++) {
    x[i] = (rand_float() * 100.0f) - 200.0f;
    y[i] = (rand_float() * 10000.0f) - 20000.0f;
  }
  t = tic();
  for (i = 0; i < iterations; i++) {
    c_saxpy(len, 5.0f, x, 1, y, 1);
    if (y[0] != y[0]) {
      printf("should not return NaN\n");
      break;
    }
  }
  elapsed = tic() - t;
  if (y[0] != y[0]) {
    printf("should not return NaN\n");
  }
  return elapsed;
}
```