int ratecode_to_dot11(int ratecode) {
  switch (ratecode) {
  case 11:
    return 12;
  case 15:
    return 18;
  case 10:
    return 24;
  case 14:
    return 36;
  case 9:
    return 48;
  case 13:
    return 72;
  case 8:
    return 96;
  case 12:
    return 108;
  case 0x1b:
    return 2;
  case 0x1a:
    return 4;
  case 0x1e:
    return 4;
  case 0x19:
    return 11;
  case 0x1d:
    return 11;
  case 0x18:
    return 22;
  case 0x1c:
    return 22;
  }
  return 0;
}


x86 assembly (clang, -O0):
<ratecode_to_dot11>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x8(%rbp)
mov    -0x8(%rbp),%eax
add    $0xfffffff8,%eax
mov    %eax,%ecx
mov    %rcx,-0x10(%rbp)
sub    $0x16,%eax
ja     11e4 <ratecode_to_dot11+0xe4>
mov    -0x10(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
movl   $0xc,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x12,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x18,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x24,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x30,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x48,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x60,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x6c,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x2,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x4,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x4,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0xb,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0xb,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x16,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x16,-0x4(%rbp)
jmp    11eb <ratecode_to_dot11+0xeb>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
pop    %rbp
ret

x86 assembly (clang, -O2):
<ratecode_to_dot11>:
add    $0xfffffff8,%edi
xor    %eax,%eax
cmp    $0x16,%edi
ja     1117 <ratecode_to_dot11+0x17>
movslq %edi,%rax
lea    0xeec(%rip),%rcx
mov    (%rcx,%rax,4),%eax
ret

LLVM IR (-O0):
define i32 @ratecode_to_dot11(i32 %0) {
%2 = alloca i32
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %20 [
i32 11, label %5
i32 15, label %6
i32 10, label %7
i32 14, label %8
i32 9, label %9
i32 13, label %10
i32 8, label %11
i32 12, label %12
i32 27, label %13
i32 26, label %14
i32 30, label %15
i32 25, label %16
i32 29, label %17
i32 24, label %18
i32 28, label %19
]
5: ; preds = %1
store i32 12, i32* %2
br label %21
6: ; preds = %1
store i32 18, i32* %2
br label %21
7: ; preds = %1
store i32 24, i32* %2
br label %21
8: ; preds = %1
store i32 36, i32* %2
br label %21
9: ; preds = %1
store i32 48, i32* %2
br label %21
10: ; preds = %1
store i32 72, i32* %2
br label %21
11: ; preds = %1
store i32 96, i32* %2
br label %21
12: ; preds = %1
store i32 108, i32* %2
br label %21
13: ; preds = %1
store i32 2, i32* %2
br label %21
14: ; preds = %1
store i32 4, i32* %2
br label %21
15: ; preds = %1
store i32 4, i32* %2
br label %21
16: ; preds = %1
store i32 11, i32* %2
br label %21
17: ; preds = %1
store i32 11, i32* %2
br label %21
18: ; preds = %1
store i32 22, i32* %2
br label %21
19: ; preds = %1
store i32 22, i32* %2
br label %21
20: ; preds = %1
store i32 0, i32* %2
br label %21
21: ; preds = %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%22 = load i32, i32* %2
ret i32 %22
}

LLVM IR (-O2):
@switch.table.ratecode_to_dot11 = [23 x i32] [i32 96, i32 48, i32 24, i32 12, i32 108, i32 72, i32 36, i32 18, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 22, i32 11, i32 4, i32 2, i32 22, i32 11, i32 4]
define i32 @ratecode_to_dot11(i32 %0) {
%2 = add i32 %0, -8
%3 = icmp ult i32 %2, 23
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = getelementptr inbounds [23 x i32], [23 x i32]* @switch.table.ratecode_to_dot11, i64 0, i64 %5
%7 = load i32, i32* %6
br label %8
8: ; preds = %1, %4
%9 = phi i32 [ %7, %4 ], [ 0, %1 ]
ret i32 %9
}