user: 请将以下的汇编代码转换成C语言代码:

```asm
<kernel_ssymv_2_lib4>:
  endbr64
  push   %r15
  mov    %rdx,%rax
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    0x38(%rsp),%rdx
  mov    0x40(%rsp),%rbp
  test   %edi,%edi
  jle    L235
  cmpl   $0x1,0x50(%rsp)
  movss  (%r8),%xmm3
  mov    %edi,%r10d
  mov    %esi,%ebx
  movss  0x4(%r8),%xmm4
  je     L168
  movss  D8(%rip),%xmm0
  xorps  %xmm0,%xmm3
  xorps  %xmm0,%xmm4
L168:
  cmpl   $0x1,0x48(%rsp)
  je     L198
  pxor   %xmm0,%xmm0
  xor    %r12d,%r12d
  movaps %xmm0,%xmm5
L35:
  cmp    %r12d,%ebx
  jle    L133
  lea    0x4(%rdx),%rdi
  mov    %r9,%rsi
  lea    0x4(%rax),%r8
  mov    %ebx,%r11d
  sub    %rdi,%rsi
  sub    %r12d,%r11d
  cmp    $0x8,%rsi
  mov    %r9,%rsi
  seta   %dil
  sub    %r8,%rsi
  cmp    $0x18,%rsi
  seta   %sil
  test   %sil,%dil
  je     L227
  cmp    $0x1,%r11d
  je     L227
  lea    -0x1(%r11),%r13d
  cmp    $0x2,%r13d
  jbe    L340
  mov    %r11d,%edi
  movaps %xmm3,%xmm7
  movaps %xmm4,%xmm6
  xor    %esi,%esi
  shr    $0x2,%edi
  shufps $0x0,%xmm7,%xmm7
  shufps $0x0,%xmm6,%xmm6
  shl    $0x4,%rdi
  nopl   0x0(%rax,%rax,1)
L131:
  movups (%rax,%rsi,1),%xmm2
  movups (%rdx,%rsi,1),%xmm1
  mulps  %xmm2,%xmm1
  addss  %xmm1,%xmm5
  movaps %xmm1,%xmm2
  shufps $0x55,%xmm1,%xmm2
  addss  %xmm2,%xmm5
  movaps %xmm1,%xmm2
  unpckhps %xmm1,%xmm2
  shufps $0xff,%xmm1,%xmm1
  addss  %xmm2,%xmm5
  movups 0x10(%rax,%rsi,1),%xmm2
  addss  %xmm1,%xmm5
  movups (%rdx,%rsi,1),%xmm1
  mulps  %xmm2,%xmm1
  addss  %xmm1,%xmm0
  movaps %xmm1,%xmm2
  shufps $0x55,%xmm1,%xmm2
  addss  %xmm2,%xmm0
  movaps %xmm1,%xmm2
  unpckhps %xmm1,%xmm2
  shufps $0xff,%xmm1,%xmm1
  addss  %xmm2,%xmm0
  movups (%r9,%rsi,1),%xmm2
  addss  %xmm1,%xmm0
  movups (%rax,%rsi,1),%xmm1
  mulps  %xmm7,%xmm1
  addps  %xmm2,%xmm1
  movups 0x10(%rax,%rsi,1),%xmm2
  mulps  %xmm6,%xmm2
  addps  %xmm2,%xmm1
  movups %xmm1,(%r9,%rsi,1)
  add    $0x10,%rsi
  cmp    %rsi,%rdi
  jne    L131
  mov    %r11d,%r14d
  and    $0xfffffffc,%r14d
  mov    %r14d,%r12d
  lea    0x0(,%r12,4),%r8
  lea    (%rax,%r8,1),%rdi
  lea    (%r9,%r8,1),%rsi
  add    %rdx,%r8
  cmp    %r14d,%r11d
  je     L143
  sub    %r14d,%r11d
  cmp    $0x1,%r11d
  je     L332
L316:
  movq   (%rdx,%r12,4),%xmm1
  movq   (%rax,%r12,4),%xmm7
  lea    0x0(,%r12,4),%r15
  movq   0x10(%rax,%r15,1),%xmm6
  lea    (%r9,%r15,1),%r14
  movaps %xmm1,%xmm2
  mulps  %xmm7,%xmm2
  mulps  %xmm6,%xmm1
  addss  %xmm2,%xmm5
  shufps $0xe5,%xmm2,%xmm2
  addss  %xmm1,%xmm0
  shufps $0xe5,%xmm1,%xmm1
  addss  %xmm2,%xmm5
  movaps %xmm3,%xmm2
  shufps $0xe0,%xmm2,%xmm2
  mulps  %xmm7,%xmm2
  addss  %xmm1,%xmm0
  movq   (%r14),%xmm1
  addps  %xmm2,%xmm1
  movaps %xmm4,%xmm2
  shufps $0xe0,%xmm2,%xmm2
  mulps  %xmm6,%xmm2
  addps  %xmm2,%xmm1
  movlps %xmm1,(%r14)
  mov    %r11d,%r14d
  and    $0xfffffffe,%r14d
  mov    %r14d,%r12d
  shl    $0x2,%r12
  add    %r12,%rdi
  add    %r12,%rsi
  add    %r12,%r8
  cmp    %r14d,%r11d
  je     L143
L332:
  movss  (%r8),%xmm2
  movss  (%rdi),%xmm6
  movaps %xmm3,%xmm7
  movss  0x10(%rdi),%xmm1
  mulss  %xmm6,%xmm7
  mulss  %xmm2,%xmm6
  addss  (%rsi),%xmm7
  mulss  %xmm1,%xmm2
  mulss  %xmm4,%xmm1
  addss  %xmm6,%xmm5
  addss  %xmm2,%xmm0
  addss  %xmm7,%xmm1
  movss  %xmm1,(%rsi)
L143:
  lea    0x4(,%r13,4),%rsi
  add    %rsi,%rax
  add    %rsi,%r9
  add    %rsi,%rdx
L71:
  lea    -0x4(,%rcx,4),%esi
  mov    %ebx,%r12d
  movslq %esi,%rsi
  lea    (%rax,%rsi,4),%rax
L257:
  lea    -0x3(%r10),%esi
  cmp    %esi,%r12d
  jge    L38
  lea    -0x4(%r10),%ebx
  shl    $0x2,%ecx
  sub    %r12d,%ebx
  movslq %ecx,%rcx
  shr    $0x2,%ebx
  shl    $0x2,%rcx
  lea    0x1(%rbx),%edi
  mov    %rcx,%rsi
  mov    %rdi,%r11
  sub    $0x1,%rdi
  imul   %rdi,%rsi
  shl    $0x4,%rdi
  lea    0xc(%r9,%rdi,1),%r8
  xor    %edi,%edi
  test   %rcx,%rcx
  cmovs  %rsi,%rdi
  add    %rax,%rdi
  cmp    %rdi,%r8
  mov    $0x1c,%r8d
  setb   %dil
  add    $0x1c,%rsi
  test   %rcx,%rcx
  cmovs  %r8,%rsi
  add    %rax,%rsi
  cmp    %rsi,%r9
  seta   %sil
  or     %dil,%sil
  je     L261
  lea    0xf(%r9),%rsi
  sub    %rdx,%rsi
  cmp    $0x1e,%rsi
  jbe    L261
  movaps %xmm4,%xmm7
  movaps %xmm3,%xmm6
  mov    %rax,%rdi
  xor    %esi,%esi
  xor    %r8d,%r8d
  shufps $0x0,%xmm7,%xmm7
  shufps $0x0,%xmm6,%xmm6
  nopl   0x0(%rax,%rax,1)
L86:
  movups (%rdi),%xmm1
  movups (%rdx,%rsi,1),%xmm2
  add    $0x1,%r8d
  movups 0x10(%rdi),%xmm10
  mulps  %xmm1,%xmm2
  addss  %xmm2,%xmm5
  movaps %xmm2,%xmm1
  movaps %xmm2,%xmm9
  shufps $0x55,%xmm2,%xmm1
  unpckhps %xmm2,%xmm9
  shufps $0xff,%xmm2,%xmm2
  addss  %xmm1,%xmm5
  movups (%rdx,%rsi,1),%xmm1
  mulps  %xmm10,%xmm1
  addss  %xmm9,%xmm5
  addss  %xmm2,%xmm5
  movups (%r9,%rsi,1),%xmm2
  addss  %xmm1,%xmm0
  movaps %xmm1,%xmm8
  shufps $0x55,%xmm1,%xmm8
  addss  %xmm8,%xmm0
  movaps %xmm1,%xmm8
  unpckhps %xmm1,%xmm8
  shufps $0xff,%xmm1,%xmm1
  addss  %xmm8,%xmm0
  addss  %xmm1,%xmm0
  movups (%rdi),%xmm1
  add    %rcx,%rdi
  mulps  %xmm6,%xmm1
  addps  %xmm2,%xmm1
  movaps %xmm10,%xmm2
  mulps  %xmm7,%xmm2
  addps  %xmm2,%xmm1
  movups %xmm1,(%r9,%rsi,1)
  add    $0x10,%rsi
  cmp    %r8d,%r11d
  ja     L86
L77:
  mov    %r11d,%r11d
  lea    0x4(%r12,%rbx,4),%r12d
  imul   %r11,%rcx
  shl    $0x4,%r11
  add    %r11,%r9
  add    %r11,%rdx
  add    %rcx,%rax
L38:
  cmp    %r12d,%r10d
  jle    L95
  lea    0x4(%rax),%rdi
  mov    %r9,%rsi
  lea    0x4(%rdx),%r8
  mov    %r10d,%ecx
  sub    %rdi,%rsi
  sub    %r12d,%ecx
  cmp    $0x18,%rsi
  mov    %r9,%rsi
  seta   %dil
  sub    %r8,%rsi
  cmp    $0x8,%rsi
  seta   %sil
  test   %sil,%dil
  je     L33
  cmp    $0x1,%ecx
  je     L33
  lea    -0x1(%rcx),%esi
  cmp    $0x2,%esi
  jbe    L53
  movups (%rax),%xmm7
  movups (%rdx),%xmm1
  mov    %ecx,%r11d
  and    $0xfffffffc,%r11d
  mulps  %xmm7,%xmm1
  movups 0x10(%rax),%xmm7
  mov    %r11d,%r10d
  lea    0x0(,%r10,4),%rsi
  lea    (%rax,%rsi,1),%r8
  lea    (%r9,%rsi,1),%rdi
  add    %rdx,%rsi
  movaps %xmm1,%xmm2
  addss  %xmm5,%xmm2
  movaps %xmm1,%xmm5
  shufps $0x55,%xmm1,%xmm5
  addss  %xmm5,%xmm2
  movaps %xmm1,%xmm5
  unpckhps %xmm1,%xmm5
  shufps $0xff,%xmm1,%xmm1
  addss  %xmm5,%xmm2
  movaps %xmm2,%xmm5
  addss  %xmm1,%xmm5
  movups (%rdx),%xmm1
  mulps  %xmm7,%xmm1
  movups (%rax),%xmm7
  addss  %xmm1,%xmm0
  movaps %xmm1,%xmm2
  shufps $0x55,%xmm1,%xmm2
  addss  %xmm2,%xmm0
  movaps %xmm1,%xmm2
  unpckhps %xmm1,%xmm2
  shufps $0xff,%xmm1,%xmm1
  addss  %xmm2,%xmm0
  movaps %xmm4,%xmm2
  shufps $0x0,%xmm2,%xmm2
  addss  %xmm1,%xmm0
  movaps %xmm3,%xmm1
  shufps $0x0,%xmm1,%xmm1
  mulps  %xmm7,%xmm1
  movups (%r9),%xmm7
  addps  %xmm7,%xmm1
  movups 0x10(%rax),%xmm7
  mulps  %xmm7,%xmm2
  addps  %xmm2,%xmm1
  movups %xmm1,(%r9)
  cmp    %r11d,%ecx
  je     L95
  sub    %r11d,%ecx
  cmp    $0x1,%ecx
  je     L267
L5:
  movq   (%rdx,%r10,4),%xmm1
  movq   (%rax,%r10,4),%xmm8
  mov    %ecx,%edx
  lea    0x0(,%r10,4),%r11
  movq   0x10(%rax,%r11,1),%xmm7
  add    %r11,%r9
  and    $0xfffffffe,%edx
  movaps %xmm1,%xmm2
  mov    %edx,%eax
  mulps  %xmm8,%xmm2
  shl    $0x2,%rax
  mulps  %xmm7,%xmm1
  add    %rax,%r8
  add    %rax,%rdi
  add    %rax,%rsi
  addss  %xmm2,%xmm5
  shufps $0xe5,%xmm2,%xmm2
  addss  %xmm1,%xmm0
  shufps $0xe5,%xmm1,%xmm1
  addss  %xmm2,%xmm5
  movaps %xmm3,%xmm2
  shufps $0xe0,%xmm2,%xmm2
  mulps  %xmm8,%xmm2
  addss  %xmm1,%xmm0
  movq   (%r9),%xmm1
  addps  %xmm2,%xmm1
  movaps %xmm4,%xmm2
  shufps $0xe0,%xmm2,%xmm2
  mulps  %xmm7,%xmm2
  addps  %xmm2,%xmm1
  movlps %xmm1,(%r9)
  cmp    %ecx,%edx
  je     L95
L267:
  movss  (%rsi),%xmm2
  movss  (%r8),%xmm6
  movss  0x10(%r8),%xmm1
  mulss  %xmm6,%xmm3
  mulss  %xmm2,%xmm6
  addss  (%rdi),%xmm3
  mulss  %xmm1,%xmm2
  mulss  %xmm4,%xmm1
  addss  %xmm6,%xmm5
  addss  %xmm2,%xmm0
  addss  %xmm3,%xmm1
  movss  %xmm1,(%rdi)
L95:
  cmpl   $0x1,0x50(%rsp)
  movss  0x0(%rbp),%xmm2
  movss  0x4(%rbp),%xmm1
  je     L363
  subss  %xmm5,%xmm2
  subss  %xmm0,%xmm1
  movss  %xmm2,0x0(%rbp)
  movss  %xmm1,0x4(%rbp)
L235:
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L198:
  movss  (%rdx),%xmm2
  mulss  (%rax),%xmm2
  pxor   %xmm6,%xmm6
  add    $0x8,%rax
  movss  0x4(%rdx),%xmm0
  movss  -0x4(%rax),%xmm1
  add    $0x8,%r9
  add    $0x8,%rdx
  mov    $0x2,%r12d
  movaps %xmm0,%xmm5
  mulss  %xmm1,%xmm5
  mulss  0xc(%rax),%xmm0
  addss  %xmm6,%xmm2
  mulss  %xmm3,%xmm1
  addss  -0x4(%r9),%xmm1
  addss  %xmm2,%xmm5
  movss  %xmm1,-0x4(%r9)
  addss  %xmm6,%xmm0
  jmp    L35
  nopl   (%rax)
L133:
  test   %ebx,%ebx
  jg     L281
  cmpl   $0x1,0x48(%rsp)
  jne    L257
L281:
  mov    %r12d,%ebx
  jmp    L71
  nop
L363:
  addss  %xmm5,%xmm2
  addss  %xmm0,%xmm1
  movss  %xmm2,0x0(%rbp)
  movss  %xmm1,0x4(%rbp)
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L227:
  lea    -0x1(%rbx),%esi
  sub    %r12d,%esi
  lea    0x4(,%rsi,4),%rdi
  xor    %esi,%esi
L15:
  movss  (%rdx,%rsi,1),%xmm2
  movss  (%rax,%rsi,1),%xmm6
  movaps %xmm3,%xmm7
  movss  0x10(%rax,%rsi,1),%xmm1
  mulss  %xmm6,%xmm7
  mulss  %xmm2,%xmm6
  addss  (%r9,%rsi,1),%xmm7
  mulss  %xmm1,%xmm2
  mulss  %xmm4,%xmm1
  addss  %xmm6,%xmm5
  addss  %xmm2,%xmm0
  addss  %xmm7,%xmm1
  movss  %xmm1,(%r9,%rsi,1)
  add    $0x4,%rsi
  cmp    %rsi,%rdi
  jne    L15
  lea    -0x1(%r11),%r13d
  jmp    L143
  nopl   (%rax)
L261:
  mov    %r11d,%r13d
  mov    %rdx,%r8
  mov    %r9,%rsi
  mov    %rax,%rdi
  shl    $0x4,%r13
  add    %r9,%r13
  nopl   0x0(%rax,%rax,1)
L284:
  movss  (%r8),%xmm1
  movss  (%rdi),%xmm6
  movaps %xmm3,%xmm7
  movaps %xmm3,%xmm8
  movss  0x10(%rdi),%xmm2
  add    $0x10,%rsi
  add    $0x10,%r8
  mulss  %xmm6,%xmm7
  mulss  %xmm1,%xmm6
  addss  -0x10(%rsi),%xmm7
  mulss  %xmm2,%xmm1
  mulss  %xmm4,%xmm2
  addss  %xmm6,%xmm5
  addss  %xmm1,%xmm0
  addss  %xmm7,%xmm2
  movaps %xmm3,%xmm7
  movss  %xmm2,-0x10(%rsi)
  movss  0x4(%rdi),%xmm6
  movss  0x14(%rdi),%xmm2
  movss  -0xc(%r8),%xmm1
  mulss  %xmm6,%xmm7
  mulss  %xmm1,%xmm6
  addss  -0xc(%rsi),%xmm7
  mulss  %xmm2,%xmm1
  mulss  %xmm4,%xmm2
  addss  %xmm6,%xmm5
  addss  %xmm1,%xmm0
  addss  %xmm7,%xmm2
  movss  %xmm2,-0xc(%rsi)
  movss  0x8(%rdi),%xmm2
  movss  0x18(%rdi),%xmm6
  movss  -0x8(%r8),%xmm1
  mulss  %xmm2,%xmm8
  mulss  %xmm1,%xmm2
  addss  -0x8(%rsi),%xmm8
  mulss  %xmm6,%xmm1
  mulss  %xmm4,%xmm6
  movaps %xmm2,%xmm7
  movaps %xmm1,%xmm2
  addss  %xmm5,%xmm7
  addss  %xmm8,%xmm6
  addss  %xmm0,%xmm2
  movss  %xmm6,-0x8(%rsi)
  movss  0xc(%rdi),%xmm5
  movss  0x1c(%rdi),%xmm1
  movaps %xmm3,%xmm6
  movss  -0x4(%r8),%xmm0
  add    %rcx,%rdi
  mulss  %xmm5,%xmm6
  mulss  %xmm0,%xmm5
  addss  -0x4(%rsi),%xmm6
  mulss  %xmm1,%xmm0
  mulss  %xmm4,%xmm1
  addss  %xmm7,%xmm5
  addss  %xmm2,%xmm0
  addss  %xmm6,%xmm1
  movss  %xmm1,-0x4(%rsi)
  cmp    %r13,%rsi
  jne    L284
  jmp    L77
  nopl   (%rax)
L33:
  movss  (%rdx),%xmm2
  movss  (%rax),%xmm6
  movaps %xmm3,%xmm7
  lea    0x1(%r12),%ecx
  movss  0x10(%rax),%xmm1
  mulss  %xmm6,%xmm7
  mulss  %xmm2,%xmm6
  addss  (%r9),%xmm7
  mulss  %xmm1,%xmm2
  mulss  %xmm4,%xmm1
  addss  %xmm6,%xmm5
  addss  %xmm2,%xmm0
  addss  %xmm7,%xmm1
  movss  %xmm1,(%r9)
  cmp    %ecx,%r10d
  jle    L95
  movss  0x4(%rdx),%xmm2
  movss  0x4(%rax),%xmm6
  movaps %xmm3,%xmm7
  lea    0x2(%r12),%ecx
  movss  0x14(%rax),%xmm1
  mulss  %xmm6,%xmm7
  mulss  %xmm2,%xmm6
  addss  0x4(%r9),%xmm7
  mulss  %xmm1,%xmm2
  mulss  %xmm4,%xmm1
  addss  %xmm6,%xmm5
  addss  %xmm2,%xmm0
  addss  %xmm7,%xmm1
  movss  %xmm1,0x4(%r9)
  cmp    %ecx,%r10d
  jle    L95
  movss  0x8(%rdx),%xmm2
  movss  0x8(%rax),%xmm6
  movaps %xmm3,%xmm7
  add    $0x3,%r12d
  movss  0x18(%rax),%xmm1
  mulss  %xmm6,%xmm7
  mulss  %xmm2,%xmm6
  addss  0x8(%r9),%xmm7
  mulss  %xmm1,%xmm2
  mulss  %xmm4,%xmm1
  addss  %xmm6,%xmm5
  addss  %xmm2,%xmm0
  addss  %xmm7,%xmm1
  movss  %xmm1,0x8(%r9)
  cmp    %r12d,%r10d
  jle    L95
  movss  0xc(%rdx),%xmm2
  movss  0xc(%rax),%xmm6
  movss  0x1c(%rax),%xmm1
  mulss  %xmm6,%xmm3
  mulss  %xmm2,%xmm6
  addss  0xc(%r9),%xmm3
  mulss  %xmm1,%xmm2
  mulss  %xmm4,%xmm1
  addss  %xmm6,%xmm5
  addss  %xmm2,%xmm0
  addss  %xmm3,%xmm1
  movss  %xmm1,0xc(%r9)
  jmp    L95
L340:
  mov    %rdx,%r8
  mov    %r9,%rsi
  mov    %rax,%rdi
  xor    %r12d,%r12d
  jmp    L316
L53:
  mov    %rdx,%rsi
  mov    %r9,%rdi
  mov    %rax,%r8
  xor    %r10d,%r10d
  jmp    L5
```

tool_calls: name: unpack_data
arguments: label: D8
type_infered: byte[4]

tool: {"D8": [0x00,0x00,0x00,0x80]}

assistant: ```c
void kernel_ssymv_2_lib4(int kmax, int kna, float *A, int sda, float *x_n, float *y_n, float *x_t, float *y_t, int tri, int alg) {
  if (kmax <= 0)
    return;
  const int bs = 4;
  int k;
  float a_00, a_01, x_n_0, x_n_1, y_n_0, x_t_0, y_t_0, y_t_1;
  if (alg == 1) {
    x_n_0 = x_n[0];
    x_n_1 = x_n[1];
  } else {
    x_n_0 = -x_n[0];
    x_n_1 = -x_n[1];
  }
  y_t_0 = 0;
  y_t_1 = 0;
  k = 0;
  if (tri == 1) {
    y_n_0 = y_n[0];
    x_t_0 = x_t[0];
    a_00 = A[0 + bs * 0];
    y_t_0 += a_00 * x_t_0;
    y_n[0] = y_n_0;
    y_n_0 = y_n[1];
    x_t_0 = x_t[1];
    a_00 = A[1 + bs * 0];
    a_01 = A[1 + bs * 1];
    y_n_0 += a_00 * x_n_0;
    y_t_0 += a_00 * x_t_0;
    y_t_1 += a_01 * x_t_0;
    y_n[1] = y_n_0;
    A += 2;
    y_n += 2;
    x_t += 2;
    k += 2;
  }
  for (; k < kna; k++) {
    y_n_0 = y_n[0];
    x_t_0 = x_t[0];
    a_00 = A[0 + bs * 0];
    a_01 = A[0 + bs * 1];
    y_n_0 += a_00 * x_n_0;
    y_t_0 += a_00 * x_t_0;
    y_n_0 += a_01 * x_n_1;
    y_t_1 += a_01 * x_t_0;
    y_n[0] = y_n_0;
    A += 1;
    y_n += 1;
    x_t += 1;
  }
  if (kna > 0 || tri == 1) {
    A += (sda - 1) * bs;
  }
  for (; k < kmax - 3; k += bs) {
    y_n_0 = y_n[0];
    x_t_0 = x_t[0];
    a_00 = A[0 + bs * 0];
    a_01 = A[0 + bs * 1];
    y_n_0 += a_00 * x_n_0;
    y_t_0 += a_00 * x_t_0;
    y_n_0 += a_01 * x_n_1;
    y_t_1 += a_01 * x_t_0;
    y_n[0] = y_n_0;
    y_n_0 = y_n[1];
    x_t_0 = x_t[1];
    a_00 = A[1 + bs * 0];
    a_01 = A[1 + bs * 1];
    y_n_0 += a_00 * x_n_0;
    y_t_0 += a_00 * x_t_0;
    y_n_0 += a_01 * x_n_1;
    y_t_1 += a_01 * x_t_0;
    y_n[1] = y_n_0;
    y_n_0 = y_n[2];
    x_t_0 = x_t[2];
    a_00 = A[2 + bs * 0];
    a_01 = A[2 + bs * 1];
    y_n_0 += a_00 * x_n_0;
    y_t_0 += a_00 * x_t_0;
    y_n_0 += a_01 * x_n_1;
    y_t_1 += a_01 * x_t_0;
    y_n[2] = y_n_0;
    y_n_0 = y_n[3];
    x_t_0 = x_t[3];
    a_00 = A[3 + bs * 0];
    a_01 = A[3 + bs * 1];
    y_n_0 += a_00 * x_n_0;
    y_t_0 += a_00 * x_t_0;
    y_n_0 += a_01 * x_n_1;
    y_t_1 += a_01 * x_t_0;
    y_n[3] = y_n_0;
    A += sda * bs;
    y_n += 4;
    x_t += 4;
  }
  for (; k < kmax; k++) {
    y_n_0 = y_n[0];
    x_t_0 = x_t[0];
    a_00 = A[0 + bs * 0];
    a_01 = A[0 + bs * 1];
    y_n_0 += a_00 * x_n_0;
    y_t_0 += a_00 * x_t_0;
    y_n_0 += a_01 * x_n_1;
    y_t_1 += a_01 * x_t_0;
    y_n[0] = y_n_0;
    A += 1;
    y_n += 1;
    x_t += 1;
  }
  if (alg == 1) {
    y_t[0] += y_t_0;
    y_t[1] += y_t_1;
  } else {
    y_t[0] -= y_t_0;
    y_t[1] -= y_t_1;
  }
}
```