char *ms_encodingstr(const char encoding) {
  switch (encoding) {
  case 0:
    return "ASCII text";
  case 1:
    return "16 bit integers";
  case 2:
    return "24 bit integers";
  case 3:
    return "32 bit integers";
  case 4:
    return "IEEE floating point";
  case 5:
    return "IEEE double precision float";
  case 10:
    return "STEIM 1 Compression";
  case 11:
    return "STEIM 2 Compression";
  case 12:
    return "GEOSCOPE Muxed 24 bit int";
  case 13:
    return "GEOSCOPE Muxed 16/3 bit gain/exp";
  case 14:
    return "GEOSCOPE Muxed 16/4 bit gain/exp";
  case 15:
    return "US National Network compression";
  case 16:
    return "CDSN 16 bit gain ranged";
  case 17:
    return "Graefenberg 16 bit gain ranged";
  case 18:
    return "IPG - Strasbourg 16 bit gain";
  case 19:
    return "STEIM 3 Compression";
  case 30:
    return "SRO Gain Ranged Format";
  case 31:
    return "HGLP Format";
  case 32:
    return "DWWSSN Format";
  case 33:
    return "RSTN 16 bit gain ranged";
  default:
    return "Unknown format code";
  }
}


x86 assembly (clang, -O0):
<ms_encodingstr>:
push   %rbp
mov    %rsp,%rbp
mov    %dil,%al
mov    %al,-0x9(%rbp)
movsbl -0x9(%rbp),%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x21,%eax
ja     1271 <ms_encodingstr+0x171>
mov    -0x18(%rbp),%rax
lea    0xed8(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf50(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf4b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf4b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf4b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf4b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf4f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf5b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf5f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf63(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf6d(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf7e(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf8f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xf9f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xfa7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xfb6(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xfc3(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xfc7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xfce(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xfca(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xfc8(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    127c <ms_encodingstr+0x17c>
lea    0xfd0(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<ms_encodingstr>:
cmp    $0x21,%dil
ja     1119 <ms_encodingstr+0x19>
movsbq %dil,%rax
lea    0x10c3(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0x10a0(%rip),%rax
ret

LLVM IR (-O0):
@.str = [11 x i8] c"ASCII text\00"
@.str.1 = [16 x i8] c"16 bit integers\00"
@.str.2 = [16 x i8] c"24 bit integers\00"
@.str.3 = [16 x i8] c"32 bit integers\00"
@.str.4 = [20 x i8] c"IEEE floating point\00"
@.str.5 = [28 x i8] c"IEEE double precision float\00"
@.str.6 = [20 x i8] c"STEIM 1 Compression\00"
@.str.7 = [20 x i8] c"STEIM 2 Compression\00"
@.str.8 = [26 x i8] c"GEOSCOPE Muxed 24 bit int\00"
@.str.9 = [33 x i8] c"GEOSCOPE Muxed 16/3 bit gain/exp\00"
@.str.10 = [33 x i8] c"GEOSCOPE Muxed 16/4 bit gain/exp\00"
@.str.11 = [32 x i8] c"US National Network compression\00"
@.str.12 = [24 x i8] c"CDSN 16 bit gain ranged\00"
@.str.13 = [31 x i8] c"Graefenberg 16 bit gain ranged\00"
@.str.14 = [29 x i8] c"IPG - Strasbourg 16 bit gain\00"
@.str.15 = [20 x i8] c"STEIM 3 Compression\00"
@.str.16 = [23 x i8] c"SRO Gain Ranged Format\00"
@.str.17 = [12 x i8] c"HGLP Format\00"
@.str.18 = [14 x i8] c"DWWSSN Format\00"
@.str.19 = [24 x i8] c"RSTN 16 bit gain ranged\00"
@.str.20 = [20 x i8] c"Unknown format code\00"
define i8* @ms_encodingstr(i8 signext %0) {
%2 = alloca i8*
%3 = alloca i8
store i8 %0, i8* %3
%4 = load i8, i8* %3
%5 = sext i8 %4 to i32
switch i32 %5, label %26 [
i32 0, label %6
i32 1, label %7
i32 2, label %8
i32 3, label %9
i32 4, label %10
i32 5, label %11
i32 10, label %12
i32 11, label %13
i32 12, label %14
i32 13, label %15
i32 14, label %16
i32 15, label %17
i32 16, label %18
i32 17, label %19
i32 18, label %20
i32 19, label %21
i32 30, label %22
i32 31, label %23
i32 32, label %24
i32 33, label %25
]
6: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i8** %2
br label %27
7: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %27
8: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %27
9: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %27
10: ; preds = %1
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %27
11: ; preds = %1
store i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %27
12: ; preds = %1
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %27
13: ; preds = %1
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %27
14: ; preds = %1
store i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %27
15: ; preds = %1
store i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %27
16: ; preds = %1
store i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %27
17: ; preds = %1
store i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %27
18: ; preds = %1
store i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %27
19: ; preds = %1
store i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %27
20: ; preds = %1
store i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.14, i64 0, i64 0), i8** %2
br label %27
21: ; preds = %1
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.15, i64 0, i64 0), i8** %2
br label %27
22: ; preds = %1
store i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.16, i64 0, i64 0), i8** %2
br label %27
23: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.17, i64 0, i64 0), i8** %2
br label %27
24: ; preds = %1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.18, i64 0, i64 0), i8** %2
br label %27
25: ; preds = %1
store i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.19, i64 0, i64 0), i8** %2
br label %27
26: ; preds = %1
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.20, i64 0, i64 0), i8** %2
br label %27
27: ; preds = %26, %25, %24, %23, %22, %21, %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6
%28 = load i8*, i8** %2
ret i8* %28
}

LLVM IR (-O2):
@.str = [11 x i8] c"ASCII text\00"
@.str.1 = [16 x i8] c"16 bit integers\00"
@.str.2 = [16 x i8] c"24 bit integers\00"
@.str.3 = [16 x i8] c"32 bit integers\00"
@.str.4 = [20 x i8] c"IEEE floating point\00"
@.str.5 = [28 x i8] c"IEEE double precision float\00"
@.str.6 = [20 x i8] c"STEIM 1 Compression\00"
@.str.7 = [20 x i8] c"STEIM 2 Compression\00"
@.str.8 = [26 x i8] c"GEOSCOPE Muxed 24 bit int\00"
@.str.9 = [33 x i8] c"GEOSCOPE Muxed 16/3 bit gain/exp\00"
@.str.10 = [33 x i8] c"GEOSCOPE Muxed 16/4 bit gain/exp\00"
@.str.11 = [32 x i8] c"US National Network compression\00"
@.str.12 = [24 x i8] c"CDSN 16 bit gain ranged\00"
@.str.13 = [31 x i8] c"Graefenberg 16 bit gain ranged\00"
@.str.14 = [29 x i8] c"IPG - Strasbourg 16 bit gain\00"
@.str.15 = [20 x i8] c"STEIM 3 Compression\00"
@.str.16 = [23 x i8] c"SRO Gain Ranged Format\00"
@.str.17 = [12 x i8] c"HGLP Format\00"
@.str.18 = [14 x i8] c"DWWSSN Format\00"
@.str.19 = [24 x i8] c"RSTN 16 bit gain ranged\00"
@.str.20 = [20 x i8] c"Unknown format code\00"
@reltable.ms_encodingstr = [34 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([16 x i8]* @.str.1 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([16 x i8]* @.str.2 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([16 x i8]* @.str.3 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.4 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([28 x i8]* @.str.5 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.6 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.7 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([26 x i8]* @.str.8 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([33 x i8]* @.str.9 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([33 x i8]* @.str.10 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([32 x i8]* @.str.11 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([24 x i8]* @.str.12 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([31 x i8]* @.str.13 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([29 x i8]* @.str.14 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.15 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.20 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([23 x i8]* @.str.16 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.17 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([14 x i8]* @.str.18 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([24 x i8]* @.str.19 to i64), i64 ptrtoint ([34 x i32]* @reltable.ms_encodingstr to i64)) to i32)]
define i8* @ms_encodingstr(i8 signext %0) {
%2 = icmp ult i8 %0, 34
br i1 %2, label %3, label %7
3: ; preds = %1
%4 = sext i8 %0 to i64
%5 = shl i64 %4, 2
%6 = call i8* @llvm.load.relative.i64(i8* bitcast ([34 x i32]* @reltable.ms_encodingstr to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ getelementptr inbounds ([20 x i8], [20 x i8]* @.str.20, i64 0, i64 0), %1 ]
ret i8* %8
}