mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-18 12:29:21 +00:00
indirectcall is the same as fib but uses function pointers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@996 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
1.1 KiB
LLVM
53 lines
1.1 KiB
LLVM
%FmtString1 = constant [ubyte] c"fib = \00"
|
|
%FmtString2 = constant [ubyte] c"\0A\00"
|
|
|
|
declare int "atoi"(sbyte *)
|
|
declare void "printInt"(int)
|
|
declare void "printString"([ubyte]*)
|
|
|
|
implementation
|
|
|
|
ulong "fib"(ulong %n)
|
|
begin
|
|
setlt ulong %n, 2 ; {bool}:0
|
|
br bool %0, label %BaseCase, label %RecurseCase
|
|
|
|
BaseCase:
|
|
ret ulong 1
|
|
|
|
RecurseCase:
|
|
%n2 = sub ulong %n, 2
|
|
%n1 = sub ulong %n, 1
|
|
%f2 = call ulong(ulong) * %fib(ulong %n2)
|
|
%f1 = call ulong(ulong) * %fib(ulong %n1)
|
|
%result = add ulong %f2, %f1
|
|
ret ulong %result
|
|
end
|
|
|
|
ulong "realmain"(int %argc, sbyte ** %argv)
|
|
begin
|
|
seteq int %argc, 2 ; {bool}:0
|
|
br bool %0, label %HasArg, label %Continue
|
|
HasArg:
|
|
; %n1 = atoi(argv[1])
|
|
%n1 = add int 1, 1
|
|
br label %Continue
|
|
|
|
Continue:
|
|
%n = phi int [%n1, %HasArg], [1, %0]
|
|
%N = cast int %n to ulong
|
|
%F = call ulong(ulong) *%fib(ulong %N)
|
|
ret ulong %F
|
|
end
|
|
|
|
int "main"()
|
|
begin
|
|
%Result = call ulong %fib(ulong 10)
|
|
%Result = cast ulong %Result to int
|
|
call void %printString([ubyte]* %FmtString1)
|
|
call void %printInt(int %Result)
|
|
call void %printString([ubyte]* %FmtString2)
|
|
ret int %Result
|
|
end
|
|
|