1; Test 16-bit atomic ANDs. 2; 3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT1 5; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT2 6 7; Check AND of a variable. 8; - CHECK is for the main loop. 9; - CHECK-SHIFT1 makes sure that the negated shift count used by the second 10; RLL is set up correctly. The negation is independent of the NILL and L 11; tested in CHECK. 12; - CHECK-SHIFT2 makes sure that %b is shifted into the high part of the word 13; before being used, and that the low bits are set to 1. This sequence is 14; independent of the other loop prologue instructions. 15define i16 @f1(i16 *%src, i16 %b) { 16; CHECK-LABEL: f1: 17; CHECK: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}} 18; CHECK-DAG: sll %r2, 3 19; CHECK-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]]) 20; CHECK: [[LABEL:\.[^:]*]]: 21; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0(%r2) 22; CHECK: nr [[ROT]], %r3 23; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0({{%r[1-9]+}}) 24; CHECK: cs [[OLD]], [[NEW]], 0([[RISBG]]) 25; CHECK: jl [[LABEL]] 26; CHECK: rll %r2, [[OLD]], 16(%r2) 27; CHECK: br %r14 28; 29; CHECK-SHIFT1-LABEL: f1: 30; CHECK-SHIFT1: sll %r2, 3 31; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], %r2 32; CHECK-SHIFT1: rll 33; CHECK-SHIFT1: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]]) 34; CHECK-SHIFT1: rll 35; CHECK-SHIFT1: br %r14 36; 37; CHECK-SHIFT2-LABEL: f1: 38; CHECK-SHIFT2: sll %r3, 16 39; CHECK-SHIFT2: oill %r3, 65535 40; CHECK-SHIFT2: rll 41; CHECK-SHIFT2: nr {{%r[0-9]+}}, %r3 42; CHECK-SHIFT2: rll 43; CHECK-SHIFT2: rll 44; CHECK-SHIFT2: br %r14 45 %res = atomicrmw and i16 *%src, i16 %b seq_cst 46 ret i16 %res 47} 48 49; Check the minimum signed value. We AND the rotated word with 0x8000ffff. 50define i16 @f2(i16 *%src) { 51; CHECK-LABEL: f2: 52; CHECK: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}} 53; CHECK-DAG: sll %r2, 3 54; CHECK-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]]) 55; CHECK: [[LABEL:\.[^:]*]]: 56; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0(%r2) 57; CHECK: nilh [[ROT]], 32768 58; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0([[NEGSHIFT:%r[1-9]+]]) 59; CHECK: cs [[OLD]], [[NEW]], 0([[RISBG]]) 60; CHECK: jl [[LABEL]] 61; CHECK: rll %r2, [[OLD]], 16(%r2) 62; CHECK: br %r14 63; 64; CHECK-SHIFT1-LABEL: f2: 65; CHECK-SHIFT1: sll %r2, 3 66; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], %r2 67; CHECK-SHIFT1: rll 68; CHECK-SHIFT1: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]]) 69; CHECK-SHIFT1: rll 70; CHECK-SHIFT1: br %r14 71; 72; CHECK-SHIFT2-LABEL: f2: 73; CHECK-SHIFT2: br %r14 74 %res = atomicrmw and i16 *%src, i16 -32768 seq_cst 75 ret i16 %res 76} 77 78; Check ANDs of -2 (-1 isn't useful). We AND the rotated word with 0xfffeffff. 79define i16 @f3(i16 *%src) { 80; CHECK-LABEL: f3: 81; CHECK: nilh [[ROT]], 65534 82; CHECK: br %r14 83; 84; CHECK-SHIFT1-LABEL: f3: 85; CHECK-SHIFT1: br %r14 86; CHECK-SHIFT2-LABEL: f3: 87; CHECK-SHIFT2: br %r14 88 %res = atomicrmw and i16 *%src, i16 -2 seq_cst 89 ret i16 %res 90} 91 92; Check ANDs of 1. We AND the rotated word with 0x0001ffff. 93define i16 @f4(i16 *%src) { 94; CHECK-LABEL: f4: 95; CHECK: nilh [[ROT]], 1 96; CHECK: br %r14 97; 98; CHECK-SHIFT1-LABEL: f4: 99; CHECK-SHIFT1: br %r14 100; CHECK-SHIFT2-LABEL: f4: 101; CHECK-SHIFT2: br %r14 102 %res = atomicrmw and i16 *%src, i16 1 seq_cst 103 ret i16 %res 104} 105 106; Check the maximum signed value. We AND the rotated word with 0x7fffffff. 107define i16 @f5(i16 *%src) { 108; CHECK-LABEL: f5: 109; CHECK: nilh [[ROT]], 32767 110; CHECK: br %r14 111; 112; CHECK-SHIFT1-LABEL: f5: 113; CHECK-SHIFT1: br %r14 114; CHECK-SHIFT2-LABEL: f5: 115; CHECK-SHIFT2: br %r14 116 %res = atomicrmw and i16 *%src, i16 32767 seq_cst 117 ret i16 %res 118} 119 120; Check ANDs of a large unsigned value. We AND the rotated word with 121; 0xfffdffff. 122define i16 @f6(i16 *%src) { 123; CHECK-LABEL: f6: 124; CHECK: nilh [[ROT]], 65533 125; CHECK: br %r14 126; 127; CHECK-SHIFT1-LABEL: f6: 128; CHECK-SHIFT1: br %r14 129; CHECK-SHIFT2-LABEL: f6: 130; CHECK-SHIFT2: br %r14 131 %res = atomicrmw and i16 *%src, i16 65533 seq_cst 132 ret i16 %res 133} 134