1 ; Test that divisions by constants are implemented as multiplications. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5 ; Check signed 32-bit division. 6 define i32 @f1(i32 %a) { 7 ; CHECK-LABEL: f1: 8 ; CHECK: lgfr [[REG:%r[0-5]]], %r2 9 ; CHECK: msgfi [[REG]], 502748801 10 ; CHECK-DAG: srlg [[RES1:%r[0-5]]], [[REG]], 63 11 ; CHECK-DAG: srag %r2, [[REG]], 46 12 ; CHECK: ar %r2, [[RES1]] 13 ; CHECK: br %r14 14 %b = sdiv i32 %a, 139968 15 ret i32 %b 16 } 17 18 ; Check unsigned 32-bit division. 19 define i32 @f2(i32 %a) { 20 ; CHECK-LABEL: f2: 21 ; CHECK: llgfr [[REG:%r[0-5]]], %r2 22 ; CHECK: msgfi [[REG]], 502748801 23 ; CHECK: srlg %r2, [[REG]], 46 24 ; CHECK: br %r14 25 %b = udiv i32 %a, 139968 26 ret i32 %b 27 } 28 29 ; Check signed 64-bit division. 30 define i64 @f3(i64 %dummy, i64 %a) { 31 ; CHECK-LABEL: f3: 32 ; CHECK-DAG: llihf [[CONST:%r[0-5]]], 1005497601 33 ; CHECK-DAG: oilf [[CONST]], 4251762321 34 ; CHECK-DAG: srag [[REG:%r[0-5]]], %r3, 63 35 ; CHECK-DAG: ngr [[REG]], [[CONST]] 36 ; CHECK-DAG: mlgr %r2, [[CONST]] 37 ; CHECK: sgr %r2, [[REG]] 38 ; CHECK: srlg [[RES1:%r[0-5]]], %r2, 63 39 ; CHECK: srag %r2, %r2, 15 40 ; CHECK: agr %r2, [[RES1]] 41 ; CHECK: br %r14 42 %b = sdiv i64 %a, 139968 43 ret i64 %b 44 } 45 46 ; Check unsigned 64-bit division. 47 define i64 @f4(i64 %dummy, i64 %a) { 48 ; CHECK-LABEL: f4: 49 ; CHECK: llihf [[CONST:%r[0-5]]], 1005497601 50 ; CHECK: oilf [[CONST]], 4251762321 51 ; CHECK: mlgr %r2, [[CONST]] 52 ; CHECK: srlg %r2, %r2, 15 53 ; CHECK: br %r14 54 %b = udiv i64 %a, 139968 55 ret i64 %b 56 } 57
