1; Test 8-bit atomic ANDs. 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 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 i8 @f1(i8 *%src, i8 %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: rll [[NEW:%r[0-9]+]], [[ROT]], 0({{%r[1-9]+}}) 24; CHECK: cs [[OLD]], [[NEW]], 0(%r2) 25; CHECK: jl [[LABEL]] 26; CHECK: rll %r2, [[OLD]], 8([[SHIFT]]) 27; CHECK: br %r14 28; 29; CHECK-SHIFT1-LABEL: f1: 30; CHECK-SHIFT1: sllg [[SHIFT:%r[1-9]+]], %r2, 3 31; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], [[SHIFT]] 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, 24 39; CHECK-SHIFT2: oilf %r3, 16777215 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 i8 *%src, i8 %b seq_cst 46 ret i8 %res 47} 48 49; Check the minimum signed value. We AND the rotated word with 0x80ffffff. 50define i8 @f2(i8 *%src) { 51; CHECK-LABEL: f2: 52; CHECK: sllg [[SHIFT:%r[1-9]+]], %r2, 3 53; CHECK: nill %r2, 65532 54; CHECK: l [[OLD:%r[0-9]+]], 0(%r2) 55; CHECK: [[LABEL:\.[^:]*]]: 56; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0([[SHIFT]]) 57; CHECK: nilh [[ROT]], 33023 58; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0([[NEGSHIFT:%r[1-9]+]]) 59; CHECK: cs [[OLD]], [[NEW]], 0(%r2) 60; CHECK: jl [[LABEL]] 61; CHECK: rll %r2, [[OLD]], 8([[SHIFT]]) 62; CHECK: br %r14 63; 64; CHECK-SHIFT1-LABEL: f2: 65; CHECK-SHIFT1: sllg [[SHIFT:%r[1-9]+]], %r2, 3 66; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], [[SHIFT]] 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 i8 *%src, i8 -128 seq_cst 75 ret i8 %res 76} 77 78; Check ANDs of -2 (-1 isn't useful). We AND the rotated word with 0xfeffffff. 79define i8 @f3(i8 *%src) { 80; CHECK-LABEL: f3: 81; CHECK: nilh [[ROT]], 65279 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 i8 *%src, i8 -2 seq_cst 89 ret i8 %res 90} 91 92; Check ANDs of 1. We AND the rotated word with 0x01ffffff. 93define i8 @f4(i8 *%src) { 94; CHECK-LABEL: f4: 95; CHECK: nilh [[ROT]], 511 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 i8 *%src, i8 1 seq_cst 103 ret i8 %res 104} 105 106; Check the maximum signed value. We AND the rotated word with 0x7fffffff. 107define i8 @f5(i8 *%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 i8 *%src, i8 127 seq_cst 117 ret i8 %res 118} 119 120; Check ANDs of a large unsigned value. We AND the rotated word with 121; 0xfdffffff. 122define i8 @f6(i8 *%src) { 123; CHECK-LABEL: f6: 124; CHECK: nilh [[ROT]], 65023 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 i8 *%src, i8 253 seq_cst 132 ret i8 %res 133} 134