| ; Test 32-bit atomic subtractions, z196 version. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s |
| |
| ; Check addition of a variable. |
| define i32 @f1(i32 %dummy, i32 *%src, i32 %b) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: lcr [[NEG:%r[0-5]]], %r4 |
| ; CHECK: laa %r2, [[NEG]], 0(%r3) |
| ; CHECK: br %r14 |
| %res = atomicrmw sub i32 *%src, i32 %b seq_cst |
| ret i32 %res |
| } |
| |
| ; Check addition of 1, which needs a temporary. |
| define i32 @f2(i32 %dummy, i32 *%src) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: lhi [[TMP:%r[0-5]]], -1 |
| ; CHECK: laa %r2, [[TMP]], 0(%r3) |
| ; CHECK: br %r14 |
| %res = atomicrmw sub i32 *%src, i32 1 seq_cst |
| ret i32 %res |
| } |
| |
| ; Check the high end of the LAA range. |
| define i32 @f3(i32 %dummy, i32 *%src, i32 %b) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: lcr [[NEG:%r[0-5]]], %r4 |
| ; CHECK: laa %r2, [[NEG]], 524284(%r3) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i32, i32 *%src, i32 131071 |
| %res = atomicrmw sub i32 *%ptr, i32 %b seq_cst |
| ret i32 %res |
| } |
| |
| ; Check the next word up, which needs separate address logic. |
| define i32 @f4(i32 %dummy, i32 *%src, i32 %b) { |
| ; CHECK-LABEL: f4: |
| ; CHECK-DAG: lcr [[NEG:%r[0-5]]], %r4 |
| ; CHECK-DAG: agfi %r3, 524288 |
| ; CHECK: laa %r2, [[NEG]], 0(%r3) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i32, i32 *%src, i32 131072 |
| %res = atomicrmw sub i32 *%ptr, i32 %b seq_cst |
| ret i32 %res |
| } |
| |
| ; Check the low end of the LAA range. |
| define i32 @f5(i32 %dummy, i32 *%src, i32 %b) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: lcr [[NEG:%r[0-5]]], %r4 |
| ; CHECK: laa %r2, [[NEG]], -524288(%r3) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i32, i32 *%src, i32 -131072 |
| %res = atomicrmw sub i32 *%ptr, i32 %b seq_cst |
| ret i32 %res |
| } |
| |
| ; Check the next word down, which needs separate address logic. |
| define i32 @f6(i32 %dummy, i32 *%src, i32 %b) { |
| ; CHECK-LABEL: f6: |
| ; CHECK-DAG: lcr [[NEG:%r[0-5]]], %r4 |
| ; CHECK-DAG: agfi %r3, -524292 |
| ; CHECK: laa %r2, [[NEG]], 0(%r3) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i32, i32 *%src, i32 -131073 |
| %res = atomicrmw sub i32 *%ptr, i32 %b seq_cst |
| ret i32 %res |
| } |