1; Test 64-bit atomic subtractions. 2; 3; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s 4 5; Check subtraction of a variable. 6define i64 @f1(i64 %dummy, i64 *%src, i64 %b) { 7; CHECK-LABEL: f1: 8; CHECK: lg %r2, 0(%r3) 9; CHECK: [[LABEL:\.[^:]*]]: 10; CHECK: lgr %r0, %r2 11; CHECK: sgr %r0, %r4 12; CHECK: csg %r2, %r0, 0(%r3) 13; CHECK: jl [[LABEL]] 14; CHECK: br %r14 15 %res = atomicrmw sub i64 *%src, i64 %b seq_cst 16 ret i64 %res 17} 18 19; Check subtraction of 1, which can use AGHI. 20define i64 @f2(i64 %dummy, i64 *%src) { 21; CHECK-LABEL: f2: 22; CHECK: lg %r2, 0(%r3) 23; CHECK: [[LABEL:\.[^:]*]]: 24; CHECK: lgr %r0, %r2 25; CHECK: aghi %r0, -1 26; CHECK: csg %r2, %r0, 0(%r3) 27; CHECK: jl [[LABEL]] 28; CHECK: br %r14 29 %res = atomicrmw sub i64 *%src, i64 1 seq_cst 30 ret i64 %res 31} 32 33; Check the low end of the AGHI range. 34define i64 @f3(i64 %dummy, i64 *%src) { 35; CHECK-LABEL: f3: 36; CHECK: aghi %r0, -32768 37; CHECK: br %r14 38 %res = atomicrmw sub i64 *%src, i64 32768 seq_cst 39 ret i64 %res 40} 41 42; Check the next value up, which must use AGFI. 43define i64 @f4(i64 %dummy, i64 *%src) { 44; CHECK-LABEL: f4: 45; CHECK: agfi %r0, -32769 46; CHECK: br %r14 47 %res = atomicrmw sub i64 *%src, i64 32769 seq_cst 48 ret i64 %res 49} 50 51; Check the low end of the AGFI range. 52define i64 @f5(i64 %dummy, i64 *%src) { 53; CHECK-LABEL: f5: 54; CHECK: agfi %r0, -2147483648 55; CHECK: br %r14 56 %res = atomicrmw sub i64 *%src, i64 2147483648 seq_cst 57 ret i64 %res 58} 59 60; Check the next value up, which must use a register operation. 61define i64 @f6(i64 %dummy, i64 *%src) { 62; CHECK-LABEL: f6: 63; CHECK: sgr 64; CHECK: br %r14 65 %res = atomicrmw sub i64 *%src, i64 2147483649 seq_cst 66 ret i64 %res 67} 68 69; Check subtraction of -1, which can use AGHI. 70define i64 @f7(i64 %dummy, i64 *%src) { 71; CHECK-LABEL: f7: 72; CHECK: aghi %r0, 1 73; CHECK: br %r14 74 %res = atomicrmw sub i64 *%src, i64 -1 seq_cst 75 ret i64 %res 76} 77 78; Check the high end of the AGHI range. 79define i64 @f8(i64 %dummy, i64 *%src) { 80; CHECK-LABEL: f8: 81; CHECK: aghi %r0, 32767 82; CHECK: br %r14 83 %res = atomicrmw sub i64 *%src, i64 -32767 seq_cst 84 ret i64 %res 85} 86 87; Check the next value down, which must use AGFI instead. 88define i64 @f9(i64 %dummy, i64 *%src) { 89; CHECK-LABEL: f9: 90; CHECK: agfi %r0, 32768 91; CHECK: br %r14 92 %res = atomicrmw sub i64 *%src, i64 -32768 seq_cst 93 ret i64 %res 94} 95 96; Check the high end of the AGFI range. 97define i64 @f10(i64 %dummy, i64 *%src) { 98; CHECK-LABEL: f10: 99; CHECK: agfi %r0, 2147483647 100; CHECK: br %r14 101 %res = atomicrmw sub i64 *%src, i64 -2147483647 seq_cst 102 ret i64 %res 103} 104 105; Check the next value down, which must use a register operation. 106define i64 @f11(i64 %dummy, i64 *%src) { 107; CHECK-LABEL: f11: 108; CHECK: sgr 109; CHECK: br %r14 110 %res = atomicrmw sub i64 *%src, i64 -2147483648 seq_cst 111 ret i64 %res 112} 113