| Bob Wilson | 13e80bd | 2009-10-27 05:50:28 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -march=arm | FileCheck %s |
| Evan Cheng | 1e249e3 | 2009-06-25 20:59:23 +0000 | [diff] [blame] | 2 | |
| 3 | define i64 @f1(i64 %a, i64 %b) { |
| Bob Wilson | 13e80bd | 2009-10-27 05:50:28 +0000 | [diff] [blame] | 4 | ; CHECK: f1: |
| 5 | ; CHECK: subs r |
| 6 | ; CHECK: sbc r |
| Evan Cheng | 1e249e3 | 2009-06-25 20:59:23 +0000 | [diff] [blame] | 7 | entry: |
| 8 | %tmp = sub i64 %a, %b |
| 9 | ret i64 %tmp |
| 10 | } |
| 11 | |
| 12 | define i64 @f2(i64 %a, i64 %b) { |
| Bob Wilson | 13e80bd | 2009-10-27 05:50:28 +0000 | [diff] [blame] | 13 | ; CHECK: f2: |
| 14 | ; CHECK: adc r |
| 15 | ; CHECK: subs r |
| 16 | ; CHECK: sbc r |
| Evan Cheng | 1e249e3 | 2009-06-25 20:59:23 +0000 | [diff] [blame] | 17 | entry: |
| 18 | %tmp1 = shl i64 %a, 1 |
| 19 | %tmp2 = sub i64 %tmp1, %b |
| 20 | ret i64 %tmp2 |
| 21 | } |
| Andrew Trick | 1c3af77 | 2011-04-23 03:55:32 +0000 | [diff] [blame^] | 22 | |
| 23 | ; add with live carry |
| 24 | define i64 @f3(i32 %al, i32 %bl) { |
| 25 | ; CHECK: f3: |
| 26 | ; CHECK: adds r |
| 27 | ; CHECK: adcs r |
| 28 | ; CHECK: adc r |
| 29 | entry: |
| 30 | ; unsigned wide add |
| 31 | %aw = zext i32 %al to i64 |
| 32 | %bw = zext i32 %bl to i64 |
| 33 | %cw = add i64 %aw, %bw |
| 34 | ; ch == carry bit |
| 35 | %ch = lshr i64 %cw, 32 |
| 36 | %dw = add i64 %ch, %bw |
| 37 | ret i64 %dw |
| 38 | } |