| ; Test 128-bit addition in which the second operand is variable. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| ; Test register addition. |
| define void @f1(i128 *%ptr, i64 %high, i64 %low) { |
| ; CHECK: f1: |
| ; CHECK: slgr {{%r[0-5]}}, %r4 |
| ; CHECK: slbgr {{%r[0-5]}}, %r3 |
| ; CHECK: br %r14 |
| %a = load i128 *%ptr |
| %highx = zext i64 %high to i128 |
| %lowx = zext i64 %low to i128 |
| %bhigh = shl i128 %highx, 64 |
| %b = or i128 %bhigh, %lowx |
| %sub = sub i128 %a, %b |
| store i128 %sub, i128 *%ptr |
| ret void |
| } |
| |
| ; Test memory addition with no offset. |
| define void @f2(i64 %addr) { |
| ; CHECK: f2: |
| ; CHECK: slg {{%r[0-5]}}, 8(%r2) |
| ; CHECK: slbg {{%r[0-5]}}, 0(%r2) |
| ; CHECK: br %r14 |
| %bptr = inttoptr i64 %addr to i128 * |
| %aptr = getelementptr i128 *%bptr, i64 -8 |
| %a = load i128 *%aptr |
| %b = load i128 *%bptr |
| %sub = sub i128 %a, %b |
| store i128 %sub, i128 *%aptr |
| ret void |
| } |
| |
| ; Test the highest aligned offset that is in range of both SLG and SLBG. |
| define void @f3(i64 %base) { |
| ; CHECK: f3: |
| ; CHECK: slg {{%r[0-5]}}, 524280(%r2) |
| ; CHECK: slbg {{%r[0-5]}}, 524272(%r2) |
| ; CHECK: br %r14 |
| %addr = add i64 %base, 524272 |
| %bptr = inttoptr i64 %addr to i128 * |
| %aptr = getelementptr i128 *%bptr, i64 -8 |
| %a = load i128 *%aptr |
| %b = load i128 *%bptr |
| %sub = sub i128 %a, %b |
| store i128 %sub, i128 *%aptr |
| ret void |
| } |
| |
| ; Test the next doubleword up, which requires separate address logic for SLG. |
| define void @f4(i64 %base) { |
| ; CHECK: f4: |
| ; CHECK: lgr [[BASE:%r[1-5]]], %r2 |
| ; CHECK: agfi [[BASE]], 524288 |
| ; CHECK: slg {{%r[0-5]}}, 0([[BASE]]) |
| ; CHECK: slbg {{%r[0-5]}}, 524280(%r2) |
| ; CHECK: br %r14 |
| %addr = add i64 %base, 524280 |
| %bptr = inttoptr i64 %addr to i128 * |
| %aptr = getelementptr i128 *%bptr, i64 -8 |
| %a = load i128 *%aptr |
| %b = load i128 *%bptr |
| %sub = sub i128 %a, %b |
| store i128 %sub, i128 *%aptr |
| ret void |
| } |
| |
| ; Test the next doubleword after that, which requires separate logic for |
| ; both instructions. It would be better to create an anchor at 524288 |
| ; that both instructions can use, but that isn't implemented yet. |
| define void @f5(i64 %base) { |
| ; CHECK: f5: |
| ; CHECK: slg {{%r[0-5]}}, 0({{%r[1-5]}}) |
| ; CHECK: slbg {{%r[0-5]}}, 0({{%r[1-5]}}) |
| ; CHECK: br %r14 |
| %addr = add i64 %base, 524288 |
| %bptr = inttoptr i64 %addr to i128 * |
| %aptr = getelementptr i128 *%bptr, i64 -8 |
| %a = load i128 *%aptr |
| %b = load i128 *%bptr |
| %sub = sub i128 %a, %b |
| store i128 %sub, i128 *%aptr |
| ret void |
| } |
| |
| ; Test the lowest displacement that is in range of both SLG and SLBG. |
| define void @f6(i64 %base) { |
| ; CHECK: f6: |
| ; CHECK: slg {{%r[0-5]}}, -524280(%r2) |
| ; CHECK: slbg {{%r[0-5]}}, -524288(%r2) |
| ; CHECK: br %r14 |
| %addr = add i64 %base, -524288 |
| %bptr = inttoptr i64 %addr to i128 * |
| %aptr = getelementptr i128 *%bptr, i64 -8 |
| %a = load i128 *%aptr |
| %b = load i128 *%bptr |
| %sub = sub i128 %a, %b |
| store i128 %sub, i128 *%aptr |
| ret void |
| } |
| |
| ; Test the next doubleword down, which is out of range of the SLBG. |
| define void @f7(i64 %base) { |
| ; CHECK: f7: |
| ; CHECK: slg {{%r[0-5]}}, -524288(%r2) |
| ; CHECK: slbg {{%r[0-5]}}, 0({{%r[1-5]}}) |
| ; CHECK: br %r14 |
| %addr = add i64 %base, -524296 |
| %bptr = inttoptr i64 %addr to i128 * |
| %aptr = getelementptr i128 *%bptr, i64 -8 |
| %a = load i128 *%aptr |
| %b = load i128 *%bptr |
| %sub = sub i128 %a, %b |
| store i128 %sub, i128 *%aptr |
| ret void |
| } |