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The i64ToString function is soon done.

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Co-authored-by: William <Rakarake@users.noreply.github.com>
This commit is contained in:
Samuel Hammersberg 2023-01-23 14:18:11 +01:00
parent b389e397b6
commit 2c17695d3a
3 changed files with 168 additions and 20 deletions
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66
test/simple_goal.ll
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@ -1,7 +1,11 @@
; External declaration of the puts function
declare i32 @puts(i8* nocapture) nounwind
declare i64 @llvm.abs.i64(i64, i1 immarg)
define [22 x i8] @i64ToString(i64 %val) {
define [21 x i8] @i64ToString(i64 %val_org) {
%val = alloca i64
store i64 %val_org, i64* %val
%val_copy = add i64 0, %val_org
; https://stackoverflow.com/a/7123710
; an algorithm for translating ints to strings
; s = ''
@ -18,43 +22,67 @@ define [22 x i8] @i64ToString(i64 %val) {
; return sign + s
; allocate memory for the string, and store the temp variable into it
%string_ptr = alloca [22 x i8]
store [22 x i8] c"Tjena banane hellosa\0A\00", ptr %string_ptr
%string_ptr = alloca [21 x i8]
store [21 x i8] c"\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00", ptr %string_ptr
; create a pointer to the array
%array_index_ptr = alloca i32
store i32 0, ptr %array_index_ptr
store i32 0, i32* %array_index_ptr
; get the value of the first element in the array
br label %while_point
while_point:
%val.tmp = load i64, i64* %val; load i64, i64* %val
%val.1 = call i64 @llvm.abs.i64(i64 %val.tmp, i1 true)
%tmp = load i32, ptr %array_index_ptr
%array_pointer.1 = getelementptr [21 x i8], [21 x i8]* %string_ptr, i32 0, i32 %tmp
%array_index_ptr.1 = add i32 %tmp, 1
store i32 %array_index_ptr.1, ptr %array_index_ptr
; this should not work, but it does
%remainder = srem i64 %val.1, 10
%remainder_tmp = alloca i64
store i64 %remainder, i64* %remainder_tmp
%remainder_tmp8 = bitcast i64* %remainder_tmp to i8*
%remainder8 = load i8, i8* %remainder_tmp8
%i = sdiv i64 %val.1, 10
%char = add i8 48, %remainder8
store i8 %char, i8* %array_pointer.1 ; update string!
store i64 %i, i64* %val
%while_condition = icmp eq i64 %i, 0
br i1 %while_condition, label %while_break, label %while_point
while_break:
; get last_pointer
%array_index_ptr.0 = load i32, i32* %array_index_ptr
%p = getelementptr [22 x i8], [22 x i8]* %string_ptr, i32 0, i32 %array_index_ptr.0
%array_pointer.0 = getelementptr [21 x i8], [21 x i8]* %string_ptr, i32 0, i32 %array_index_ptr.0
; check if p is below 0
%condition = icmp slt i64 %val, 0
%condition = icmp slt i64 %val_copy, 0
br i1 %condition, label %negative_check_true, label %negative_check_false
negative_check_true:
store i8 45, i8* %p
store i8 45, i8* %array_pointer.0
br label %negative_check_done
negative_check_false:
store i8 43, i8* %p
; store i8 43, i8* %array_pointer.0
br label %negative_check_done
negative_check_done:
; iterate over the next nums
%noop = add i32 0, 0
; load the result and return it
%res = load [22 x i8],[22 x i8]* %string_ptr
ret [22 x i8] %res
%res = load [21 x i8],[21 x i8]* %string_ptr
ret [21 x i8] %res
}
; Definition of main function
define i32 @main() { ; i32()*
%val = add i64 1, 0
; %val = add i64 -123456789, 0
%val = add i64 -1234, 0
%print_res = call [22 x i8] @i64ToString(i64 %val)
%ptr = alloca [22 x i8]
store [22 x i8] %print_res, ptr %ptr
%print_res = call [21 x i8] @i64ToString(i64 %val)
%ptr = alloca [21 x i8]
store [21 x i8] %print_res, ptr %ptr
call i32 @puts(i8* %ptr)