1; Test 16-bit atomic NANDs. 2; 3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK 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 NAND 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: sllg [[SHIFT:%r[1-9]+]], %r2, 3 18; CHECK: nill %r2, 65532 19; CHECK: l [[OLD:%r[0-9]+]], 0(%r2) 20; CHECK: [[LABEL:\.[^:]*]]: 21; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0([[SHIFT]]) 22; CHECK: nr [[ROT]], %r3 23; CHECK: xilf [[ROT]], 4294901760 24; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0({{%r[1-9]+}}) 25; CHECK: cs [[OLD]], [[NEW]], 0(%r2) 26; CHECK: jl [[LABEL]] 27; CHECK: rll %r2, [[OLD]], 16([[SHIFT]]) 28; CHECK: br %r14 29; 30; CHECK-SHIFT1-LABEL: f1: 31; CHECK-SHIFT1: sllg [[SHIFT:%r[1-9]+]], %r2, 3 32; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], [[SHIFT]] 33; CHECK-SHIFT1: rll 34; CHECK-SHIFT1: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]]) 35; CHECK-SHIFT1: rll 36; CHECK-SHIFT1: br %r14 37; 38; CHECK-SHIFT2-LABEL: f1: 39; CHECK-SHIFT2: sll %r3, 16 40; CHECK-SHIFT2: oill %r3, 65535 41; CHECK-SHIFT2: rll 42; CHECK-SHIFT2: nr {{%r[0-9]+}}, %r3 43; CHECK-SHIFT2: rll 44; CHECK-SHIFT2: rll 45; CHECK-SHIFT2: br %r14 46 %res = atomicrmw nand i16 *%src, i16 %b seq_cst 47 ret i16 %res 48} 49 50; Check the minimum signed value. We AND the rotated word with 0x8000ffff. 51define i16 @f2(i16 *%src) { 52; CHECK-LABEL: f2: 53; CHECK: sllg [[SHIFT:%r[1-9]+]], %r2, 3 54; CHECK: nill %r2, 65532 55; CHECK: l [[OLD:%r[0-9]+]], 0(%r2) 56; CHECK: [[LABEL:\.[^:]*]]: 57; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0([[SHIFT]]) 58; CHECK: nilh [[ROT]], 32768 59; CHECK: xilf [[ROT]], 4294901760 60; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0([[NEGSHIFT:%r[1-9]+]]) 61; CHECK: cs [[OLD]], [[NEW]], 0(%r2) 62; CHECK: jl [[LABEL]] 63; CHECK: rll %r2, [[OLD]], 16([[SHIFT]]) 64; CHECK: br %r14 65; 66; CHECK-SHIFT1-LABEL: f2: 67; CHECK-SHIFT1: sllg [[SHIFT:%r[1-9]+]], %r2, 3 68; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], [[SHIFT]] 69; CHECK-SHIFT1: rll 70; CHECK-SHIFT1: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]]) 71; CHECK-SHIFT1: rll 72; CHECK-SHIFT1: br %r14 73; 74; CHECK-SHIFT2-LABEL: f2: 75; CHECK-SHIFT2: br %r14 76 %res = atomicrmw nand i16 *%src, i16 -32768 seq_cst 77 ret i16 %res 78} 79 80; Check NANDs of -2 (-1 isn't useful). We AND the rotated word with 0xfffeffff. 81define i16 @f3(i16 *%src) { 82; CHECK-LABEL: f3: 83; CHECK: nilh [[ROT]], 65534 84; CHECK: xilf [[ROT]], 4294901760 85; CHECK: br %r14 86; 87; CHECK-SHIFT1-LABEL: f3: 88; CHECK-SHIFT1: br %r14 89; CHECK-SHIFT2-LABEL: f3: 90; CHECK-SHIFT2: br %r14 91 %res = atomicrmw nand i16 *%src, i16 -2 seq_cst 92 ret i16 %res 93} 94 95; Check ANDs of 1. We AND the rotated word with 0x0001ffff. 96define i16 @f4(i16 *%src) { 97; CHECK-LABEL: f4: 98; CHECK: nilh [[ROT]], 1 99; CHECK: xilf [[ROT]], 4294901760 100; CHECK: br %r14 101; 102; CHECK-SHIFT1-LABEL: f4: 103; CHECK-SHIFT1: br %r14 104; CHECK-SHIFT2-LABEL: f4: 105; CHECK-SHIFT2: br %r14 106 %res = atomicrmw nand i16 *%src, i16 1 seq_cst 107 ret i16 %res 108} 109 110; Check the maximum signed value. We AND the rotated word with 0x7fffffff. 111define i16 @f5(i16 *%src) { 112; CHECK-LABEL: f5: 113; CHECK: nilh [[ROT]], 32767 114; CHECK: xilf [[ROT]], 4294901760 115; CHECK: br %r14 116; 117; CHECK-SHIFT1-LABEL: f5: 118; CHECK-SHIFT1: br %r14 119; CHECK-SHIFT2-LABEL: f5: 120; CHECK-SHIFT2: br %r14 121 %res = atomicrmw nand i16 *%src, i16 32767 seq_cst 122 ret i16 %res 123} 124 125; Check NANDs of a large unsigned value. We AND the rotated word with 126; 0xfffdffff. 127define i16 @f6(i16 *%src) { 128; CHECK-LABEL: f6: 129; CHECK: nilh [[ROT]], 65533 130; CHECK: xilf [[ROT]], 4294901760 131; CHECK: br %r14 132; 133; CHECK-SHIFT1-LABEL: f6: 134; CHECK-SHIFT1: br %r14 135; CHECK-SHIFT2-LABEL: f6: 136; CHECK-SHIFT2: br %r14 137 %res = atomicrmw nand i16 *%src, i16 65533 seq_cst 138 ret i16 %res 139} 140