| ; Test 64-bit byteswaps from registers to memory. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| declare i64 @llvm.bswap.i64(i64 %a) |
| |
| ; Check STRVG with no displacement. |
| define void @f1(ptr %dst, i64 %a) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: strvg %r3, 0(%r2) |
| ; CHECK: br %r14 |
| %swapped = call i64 @llvm.bswap.i64(i64 %a) |
| store i64 %swapped, ptr %dst |
| ret void |
| } |
| |
| ; Check the high end of the aligned STRVG range. |
| define void @f2(ptr %dst, i64 %a) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: strvg %r3, 524280(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64, ptr %dst, i64 65535 |
| %swapped = call i64 @llvm.bswap.i64(i64 %a) |
| store i64 %swapped, ptr %ptr |
| ret void |
| } |
| |
| ; Check the next doubleword up, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define void @f3(ptr %dst, i64 %a) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: agfi %r2, 524288 |
| ; CHECK: strvg %r3, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64, ptr %dst, i64 65536 |
| %swapped = call i64 @llvm.bswap.i64(i64 %a) |
| store i64 %swapped, ptr %ptr |
| ret void |
| } |
| |
| ; Check the high end of the negative aligned STRVG range. |
| define void @f4(ptr %dst, i64 %a) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: strvg %r3, -8(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64, ptr %dst, i64 -1 |
| %swapped = call i64 @llvm.bswap.i64(i64 %a) |
| store i64 %swapped, ptr %ptr |
| ret void |
| } |
| |
| ; Check the low end of the STRVG range. |
| define void @f5(ptr %dst, i64 %a) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: strvg %r3, -524288(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64, ptr %dst, i64 -65536 |
| %swapped = call i64 @llvm.bswap.i64(i64 %a) |
| store i64 %swapped, ptr %ptr |
| ret void |
| } |
| |
| ; Check the next doubleword down, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define void @f6(ptr %dst, i64 %a) { |
| ; CHECK-LABEL: f6: |
| ; CHECK: agfi %r2, -524296 |
| ; CHECK: strvg %r3, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64, ptr %dst, i64 -65537 |
| %swapped = call i64 @llvm.bswap.i64(i64 %a) |
| store i64 %swapped, ptr %ptr |
| ret void |
| } |
| |
| ; Check that STRVG allows an index. |
| define void @f7(i64 %src, i64 %index, i64 %a) { |
| ; CHECK-LABEL: f7: |
| ; CHECK: strvg %r4, 524287({{%r3,%r2|%r2,%r3}}) |
| ; CHECK: br %r14 |
| %add1 = add i64 %src, %index |
| %add2 = add i64 %add1, 524287 |
| %ptr = inttoptr i64 %add2 to ptr |
| %swapped = call i64 @llvm.bswap.i64(i64 %a) |
| store i64 %swapped, ptr %ptr |
| ret void |
| } |
| |