| ; Test 8-bit atomic XORs. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT1 |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT2 |
| |
| ; Check XOR of a variable. |
| ; - CHECK is for the main loop. |
| ; - CHECK-SHIFT1 makes sure that the negated shift count used by the second |
| ; RLL is set up correctly. The negation is independent of the NILL and L |
| ; tested in CHECK. |
| ; - CHECK-SHIFT2 makes sure that %b is shifted into the high part of the word |
| ; before being used. This shift is independent of the other loop prologue |
| ; instructions. |
| define i8 @f1(ptr %src, i8 %b) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}} |
| ; CHECK-DAG: sll %r2, 3 |
| ; CHECK-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]]) |
| ; CHECK: [[LABEL:\.[^:]*]]: |
| ; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0(%r2) |
| ; CHECK: xr [[ROT]], %r3 |
| ; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0({{%r[1-9]+}}) |
| ; CHECK: cs [[OLD]], [[NEW]], 0([[RISBG]]) |
| ; CHECK: jl [[LABEL]] |
| ; CHECK: rll %r2, [[OLD]], 8(%r2) |
| ; CHECK: br %r14 |
| ; |
| ; CHECK-SHIFT1-LABEL: f1: |
| ; CHECK-SHIFT1: sll %r2, 3 |
| ; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], %r2 |
| ; CHECK-SHIFT1: rll |
| ; CHECK-SHIFT1: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]]) |
| ; CHECK-SHIFT1: rll |
| ; CHECK-SHIFT1: br %r14 |
| ; |
| ; CHECK-SHIFT2-LABEL: f1: |
| ; CHECK-SHIFT2: sll %r3, 24 |
| ; CHECK-SHIFT2: rll |
| ; CHECK-SHIFT2: xr {{%r[0-9]+}}, %r3 |
| ; CHECK-SHIFT2: rll |
| ; CHECK-SHIFT2: rll |
| ; CHECK-SHIFT2: br %r14 |
| %res = atomicrmw xor ptr %src, i8 %b seq_cst |
| ret i8 %res |
| } |
| |
| ; Check the minimum signed value. We XOR the rotated word with 0x80000000. |
| define i8 @f2(ptr %src) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: risbg [[RISBG:%r[1-9]+]], %r2, 0, 189, 0{{$}} |
| ; CHECK-DAG: sll %r2, 3 |
| ; CHECK-DAG: l [[OLD:%r[0-9]+]], 0([[RISBG]]) |
| ; CHECK: [[LABEL:\.[^:]*]]: |
| ; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0(%r2) |
| ; CHECK: xilf [[ROT]], 2147483648 |
| ; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0([[NEGSHIFT:%r[1-9]+]]) |
| ; CHECK: cs [[OLD]], [[NEW]], 0([[RISBG]]) |
| ; CHECK: jl [[LABEL]] |
| ; CHECK: rll %r2, [[OLD]], 8(%r2) |
| ; CHECK: br %r14 |
| ; |
| ; CHECK-SHIFT1-LABEL: f2: |
| ; CHECK-SHIFT1: sll %r2, 3 |
| ; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], %r2 |
| ; CHECK-SHIFT1: rll |
| ; CHECK-SHIFT1: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]]) |
| ; CHECK-SHIFT1: rll |
| ; CHECK-SHIFT1: br %r14 |
| ; |
| ; CHECK-SHIFT2-LABEL: f2: |
| ; CHECK-SHIFT2: br %r14 |
| %res = atomicrmw xor ptr %src, i8 -128 seq_cst |
| ret i8 %res |
| } |
| |
| ; Check XORs of -1. We XOR the rotated word with 0xff000000. |
| define i8 @f3(ptr %src) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: xilf [[ROT]], 4278190080 |
| ; CHECK: br %r14 |
| ; |
| ; CHECK-SHIFT1-LABEL: f3: |
| ; CHECK-SHIFT1: br %r14 |
| ; CHECK-SHIFT2-LABEL: f3: |
| ; CHECK-SHIFT2: br %r14 |
| %res = atomicrmw xor ptr %src, i8 -1 seq_cst |
| ret i8 %res |
| } |
| |
| ; Check XORs of 1. We XOR the rotated word with 0x01000000. |
| define i8 @f4(ptr %src) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: xilf [[ROT]], 16777216 |
| ; CHECK: br %r14 |
| ; |
| ; CHECK-SHIFT1-LABEL: f4: |
| ; CHECK-SHIFT1: br %r14 |
| ; CHECK-SHIFT2-LABEL: f4: |
| ; CHECK-SHIFT2: br %r14 |
| %res = atomicrmw xor ptr %src, i8 1 seq_cst |
| ret i8 %res |
| } |
| |
| ; Check the maximum signed value. We XOR the rotated word with 0x7f000000. |
| define i8 @f5(ptr %src) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: xilf [[ROT]], 2130706432 |
| ; CHECK: br %r14 |
| ; |
| ; CHECK-SHIFT1-LABEL: f5: |
| ; CHECK-SHIFT1: br %r14 |
| ; CHECK-SHIFT2-LABEL: f5: |
| ; CHECK-SHIFT2: br %r14 |
| %res = atomicrmw xor ptr %src, i8 127 seq_cst |
| ret i8 %res |
| } |
| |
| ; Check XORs of a large unsigned value. We XOR the rotated word with |
| ; 0xfd000000. |
| define i8 @f6(ptr %src) { |
| ; CHECK-LABEL: f6: |
| ; CHECK: xilf [[ROT]], 4244635648 |
| ; CHECK: br %r14 |
| ; |
| ; CHECK-SHIFT1-LABEL: f6: |
| ; CHECK-SHIFT1: br %r14 |
| ; CHECK-SHIFT2-LABEL: f6: |
| ; CHECK-SHIFT2: br %r14 |
| %res = atomicrmw xor ptr %src, i8 253 seq_cst |
| ret i8 %res |
| } |