| Richard Sandiford | fac8b10 | 2013-07-19 16:37:00 +0000 | [diff] [blame] | 1 | ; Test 128-bit subtraction when the distinct-operands facility is available. |
| 2 | ; |
| 3 | ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s |
| 4 | |
| 5 | ; Test the case where both operands are in registers. |
| 6 | define i64 @f1(i64 %a, i64 %b, i64 %c, i64 %d, i64 *%ptr) { |
| 7 | ; CHECK-LABEL: f1: |
| 8 | ; CHECK: slgrk %r2, %r4, %r5 |
| 9 | ; CHECK: slbgr |
| 10 | ; CHECK: br %r14 |
| 11 | %x1 = insertelement <2 x i64> undef, i64 %b, i32 0 |
| 12 | %x2 = insertelement <2 x i64> %x1, i64 %c, i32 1 |
| 13 | %x = bitcast <2 x i64> %x2 to i128 |
| 14 | %y2 = insertelement <2 x i64> %x1, i64 %d, i32 1 |
| 15 | %y = bitcast <2 x i64> %y2 to i128 |
| 16 | %sub = sub i128 %x, %y |
| 17 | %subv = bitcast i128 %sub to <2 x i64> |
| 18 | %high = extractelement <2 x i64> %subv, i32 0 |
| 19 | store i64 %high, i64 *%ptr |
| 20 | %low = extractelement <2 x i64> %subv, i32 1 |
| 21 | ret i64 %low |
| 22 | } |