| ; Test floating-point negation on z14. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 | FileCheck %s |
| |
| ; Test f32. |
| define float @f1(float %f) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: lcdfr %f0, %f0 |
| ; CHECK: br %r14 |
| %res = fneg float %f |
| ret float %res |
| } |
| |
| ; Test f64. |
| define double @f2(double %f) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: lcdfr %f0, %f0 |
| ; CHECK: br %r14 |
| %res = fneg double %f |
| ret double %res |
| } |
| |
| ; Test f128. With the loads and stores, a pure negation would probably |
| ; be better implemented using an XI on the upper byte. Do some extra |
| ; processing so that using FPRs is unequivocally better. |
| define void @f3(ptr %ptr, ptr %ptr2) { |
| ; CHECK-LABEL: f3: |
| ; CHECK-DAG: vl [[REG1:%v[0-9]+]], 0(%r2) |
| ; CHECK-DAG: vl [[REG2:%v[0-9]+]], 0(%r3) |
| ; CHECK-DAG: wflcxb [[NEGREG1:%v[0-9]+]], [[REG1]] |
| ; CHECK: wfdxb [[RES:%v[0-9]+]], [[NEGREG1]], [[REG2]] |
| ; CHECK: vst [[RES]], 0(%r2) |
| ; CHECK: br %r14 |
| %orig = load fp128, ptr %ptr |
| %negzero = fpext float -0.0 to fp128 |
| %neg = fneg fp128 %orig |
| %op2 = load fp128, ptr %ptr2 |
| %res = fdiv fp128 %neg, %op2 |
| store fp128 %res, ptr %ptr |
| ret void |
| } |
