1 ; Test 64-bit atomic subtractions, z196 version. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s 4 5 ; Check addition of a variable. 6 define i64 @f1(i64 %dummy, i64 *%src, i64 %b) { 7 ; CHECK-LABEL: f1: 8 ; CHECK: lcgr [[NEG:%r[0-5]]], %r4 9 ; CHECK: laag %r2, [[NEG]], 0(%r3) 10 ; CHECK: br %r14 11 %res = atomicrmw sub i64 *%src, i64 %b seq_cst 12 ret i64 %res 13 } 14 15 ; Check addition of 1, which needs a temporary. 16 define i64 @f2(i64 %dummy, i64 *%src) { 17 ; CHECK-LABEL: f2: 18 ; CHECK: lghi [[TMP:%r[0-5]]], -1 19 ; CHECK: laag %r2, [[TMP]], 0(%r3) 20 ; CHECK: br %r14 21 %res = atomicrmw sub i64 *%src, i64 1 seq_cst 22 ret i64 %res 23 } 24 25 ; Check the high end of the LAAG range. 26 define i64 @f3(i64 %dummy, i64 *%src, i64 %b) { 27 ; CHECK-LABEL: f3: 28 ; CHECK: lcgr [[NEG:%r[0-5]]], %r4 29 ; CHECK: laag %r2, [[NEG]], 524280(%r3) 30 ; CHECK: br %r14 31 %ptr = getelementptr i64, i64 *%src, i64 65535 32 %res = atomicrmw sub i64 *%ptr, i64 %b seq_cst 33 ret i64 %res 34 } 35 36 ; Check the next doubleword up, which needs separate address logic. 37 define i64 @f4(i64 %dummy, i64 *%src, i64 %b) { 38 ; CHECK-LABEL: f4: 39 ; CHECK-DAG: lcgr [[NEG:%r[0-5]]], %r4 40 ; CHECK-DAG: agfi %r3, 524288 41 ; CHECK: laag %r2, [[NEG]], 0(%r3) 42 ; CHECK: br %r14 43 %ptr = getelementptr i64, i64 *%src, i64 65536 44 %res = atomicrmw sub i64 *%ptr, i64 %b seq_cst 45 ret i64 %res 46 } 47 48 ; Check the low end of the LAAG range. 49 define i64 @f5(i64 %dummy, i64 *%src, i64 %b) { 50 ; CHECK-LABEL: f5: 51 ; CHECK: lcgr [[NEG:%r[0-5]]], %r4 52 ; CHECK: laag %r2, [[NEG]], -524288(%r3) 53 ; CHECK: br %r14 54 %ptr = getelementptr i64, i64 *%src, i64 -65536 55 %res = atomicrmw sub i64 *%ptr, i64 %b seq_cst 56 ret i64 %res 57 } 58 59 ; Check the next doubleword down, which needs separate address logic. 60 define i64 @f6(i64 %dummy, i64 *%src, i64 %b) { 61 ; CHECK-LABEL: f6: 62 ; CHECK-DAG: lcgr [[NEG:%r[0-5]]], %r4 63 ; CHECK-DAG: agfi %r3, -524296 64 ; CHECK: laag %r2, [[NEG]], 0(%r3) 65 ; CHECK: br %r14 66 %ptr = getelementptr i64, i64 *%src, i64 -65537 67 %res = atomicrmw sub i64 *%ptr, i64 %b seq_cst 68 ret i64 %res 69 } 70
