1*9880d681SAndroid Build Coastguard Worker; Test 8-bit atomic exchange. 2*9880d681SAndroid Build Coastguard Worker; 3*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT 5*9880d681SAndroid Build Coastguard Worker 6*9880d681SAndroid Build Coastguard Worker; Check exchange with a variable. 7*9880d681SAndroid Build Coastguard Worker; - CHECK is for the main loop. 8*9880d681SAndroid Build Coastguard Worker; - CHECK-SHIFT makes sure that the negated shift count used by the second 9*9880d681SAndroid Build Coastguard Worker; RLL is set up correctly. The negation is independent of the NILL and L 10*9880d681SAndroid Build Coastguard Worker; tested in CHECK. CHECK-SHIFT also checks that %r3 is not modified before 11*9880d681SAndroid Build Coastguard Worker; being used in the RISBG (in contrast to things like atomic addition, 12*9880d681SAndroid Build Coastguard Worker; which shift %r3 left so that %b is at the high end of the word). 13*9880d681SAndroid Build Coastguard Workerdefine i8 @f1(i8 *%src, i8 %b) { 14*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: f1: 15*9880d681SAndroid Build Coastguard Worker; CHECK: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}} 16*9880d681SAndroid Build Coastguard Worker; CHECK: sll %r2, 3 17*9880d681SAndroid Build Coastguard Worker; CHECK: l [[OLD:%r[0-9]+]], 0([[RISBG]]) 18*9880d681SAndroid Build Coastguard Worker; CHECK: [[LABEL:\.[^:]*]]: 19*9880d681SAndroid Build Coastguard Worker; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0(%r2) 20*9880d681SAndroid Build Coastguard Worker; CHECK: risbg [[ROT]], %r3, 32, 39, 24 21*9880d681SAndroid Build Coastguard Worker; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0({{%r[1-9]+}}) 22*9880d681SAndroid Build Coastguard Worker; CHECK: cs [[OLD]], [[NEW]], 0([[RISBG]]) 23*9880d681SAndroid Build Coastguard Worker; CHECK: jl [[LABEL]] 24*9880d681SAndroid Build Coastguard Worker; CHECK: rll %r2, [[OLD]], 8(%r2) 25*9880d681SAndroid Build Coastguard Worker; CHECK: br %r14 26*9880d681SAndroid Build Coastguard Worker; 27*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT-LABEL: f1: 28*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT-NOT: %r3 29*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT: sll %r2, 3 30*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT-NOT: %r3 31*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT: lcr [[NEGSHIFT:%r[1-9]+]], %r2 32*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT-NOT: %r3 33*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT: rll 34*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT-NOT: %r3 35*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT: risbg {{%r[0-9]+}}, %r3, 32, 39, 24 36*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]]) 37*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT: rll 38*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT: br %r14 39*9880d681SAndroid Build Coastguard Worker %res = atomicrmw xchg i8 *%src, i8 %b seq_cst 40*9880d681SAndroid Build Coastguard Worker ret i8 %res 41*9880d681SAndroid Build Coastguard Worker} 42*9880d681SAndroid Build Coastguard Worker 43*9880d681SAndroid Build Coastguard Worker; Check exchange with a constant. We should force the constant into 44*9880d681SAndroid Build Coastguard Worker; a register and use the sequence above. 45*9880d681SAndroid Build Coastguard Workerdefine i8 @f2(i8 *%src) { 46*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: f2: 47*9880d681SAndroid Build Coastguard Worker; CHECK: lhi [[VALUE:%r[0-9]+]], 88 48*9880d681SAndroid Build Coastguard Worker; CHECK: risbg {{%r[0-9]+}}, [[VALUE]], 32, 39, 24 49*9880d681SAndroid Build Coastguard Worker; CHECK: br %r14 50*9880d681SAndroid Build Coastguard Worker; 51*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT-LABEL: f2: 52*9880d681SAndroid Build Coastguard Worker; CHECK-SHIFT: br %r14 53*9880d681SAndroid Build Coastguard Worker %res = atomicrmw xchg i8 *%src, i8 88 seq_cst 54*9880d681SAndroid Build Coastguard Worker ret i8 %res 55*9880d681SAndroid Build Coastguard Worker} 56