| ; Test that divisions by constants are implemented as multiplications. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -asm-verbose=0 | FileCheck %s |
| |
| ; Check signed 32-bit division. |
| define i32 @f1(i32 %a) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: lgfr [[REG:%r[0-5]]], %r2 |
| ; CHECK: msgfi [[REG]], 502748801 |
| ; CHECK-DAG: srlg [[RES1:%r[0-5]]], [[REG]], 63 |
| ; CHECK-DAG: srag %r2, [[REG]], 46 |
| ; CHECK: ar %r2, [[RES1]] |
| ; CHECK: br %r14 |
| %b = sdiv i32 %a, 139968 |
| ret i32 %b |
| } |
| |
| ; Check unsigned 32-bit division. |
| define i32 @f2(i32 %a) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: llgfr [[REG:%r[0-5]]], %r2 |
| ; CHECK: msgfi [[REG]], 502748801 |
| ; CHECK: srlg %r2, [[REG]], 46 |
| ; CHECK: br %r14 |
| %b = udiv i32 %a, 139968 |
| ret i32 %b |
| } |
| |
| ; Check signed 64-bit division. |
| define i64 @f3(i64 %dummy, i64 %a) { |
| ; CHECK-LABEL: f3: |
| ; CHECK-DAG: llihf [[CONST:%r[0-5]]], 1005497601 |
| ; CHECK-DAG: oilf [[CONST]], 4251762321 |
| ; CHECK-DAG: srag [[REG:%r[0-5]]], %r3, 63 |
| ; CHECK-DAG: ngr [[REG]], [[CONST]] |
| ; CHECK-DAG: mlgr %r2, [[CONST]] |
| ; CHECK: sgr %r2, [[REG]] |
| ; CHECK: srlg [[RES1:%r[0-5]]], %r2, 63 |
| ; CHECK: srag %r2, %r2, 15 |
| ; CHECK: agr %r2, [[RES1]] |
| ; CHECK: br %r14 |
| %b = sdiv i64 %a, 139968 |
| ret i64 %b |
| } |
| |
| ; Check unsigned 64-bit division. |
| define i64 @f4(i64 %dummy, i64 %a) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: llihf [[CONST:%r[0-5]]], 1005497601 |
| ; CHECK: oilf [[CONST]], 4251762321 |
| ; CHECK: mlgr %r2, [[CONST]] |
| ; CHECK: srlg %r2, %r2, 15 |
| ; CHECK: br %r14 |
| %b = udiv i64 %a, 139968 |
| ret i64 %b |
| } |