1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
; RUN: llc -march=thumb -mattr=+thumb2 < %s | FileCheck %s
define i64 @f1(i64 %a, i64 %b) {
; CHECK: f1
; CHECK: subs r0, r0, r2
%tmp = sub i64 %a, %b
ret i64 %tmp
}
; 734439407618 = 0x000000ab00000002
define i64 @f2(i64 %a) {
; CHECK: f2
; CHECK: subs r0, #2
; CHECK: sbc r1, r1, #171
%tmp = sub i64 %a, 734439407618
ret i64 %tmp
}
; 5066626890203138 = 0x0012001200000002
define i64 @f3(i64 %a) {
; CHECK: f3
; CHECK: subs r0, #2
; CHECK: sbc r1, r1, #1179666
%tmp = sub i64 %a, 5066626890203138
ret i64 %tmp
}
; 3747052064576897026 = 0x3400340000000002
define i64 @f4(i64 %a) {
; CHECK: f4
; CHECK: subs r0, #2
; CHECK: sbc r1, r1, #872428544
%tmp = sub i64 %a, 3747052064576897026
ret i64 %tmp
}
; 6221254862626095106 = 0x5656565600000002
define i64 @f5(i64 %a) {
; CHECK: f5
; CHECK: subs r0, #2
; CHECK: adc r1, r1, #-1448498775
%tmp = sub i64 %a, 6221254862626095106
ret i64 %tmp
}
; 287104476244869122 = 0x03fc000000000002
define i64 @f6(i64 %a) {
; CHECK: f6
; CHECK: subs r0, #2
; CHECK: sbc r1, r1, #66846720
%tmp = sub i64 %a, 287104476244869122
ret i64 %tmp
}
; Example from numerics code that manually computes wider-than-64 values.
;
; CHECK-LABEL: livecarry:
; CHECK: adds
; CHECK: adc
define i64 @livecarry(i64 %carry, i32 %digit) nounwind {
%ch = lshr i64 %carry, 32
%cl = and i64 %carry, 4294967295
%truncdigit = zext i32 %digit to i64
%prod = add i64 %cl, %truncdigit
%ph = lshr i64 %prod, 32
%carryresult = add i64 %ch, %ph
ret i64 %carryresult
}
|
