1; Test negated floating-point absolute. 2; 3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5; Test f32. 6declare float @llvm.fabs.f32(float %f) 7define float @f1(float %f) { 8; CHECK-LABEL: f1: 9; CHECK: lnebr %f0, %f0 10; CHECK: br %r14 11 %abs = call float @llvm.fabs.f32(float %f) 12 %res = fsub float -0.0, %abs 13 ret float %res 14} 15 16; Test f64. 17declare double @llvm.fabs.f64(double %f) 18define double @f2(double %f) { 19; CHECK-LABEL: f2: 20; CHECK: lndbr %f0, %f0 21; CHECK: br %r14 22 %abs = call double @llvm.fabs.f64(double %f) 23 %res = fsub double -0.0, %abs 24 ret double %res 25} 26 27; Test f128. With the loads and stores, a pure negative-absolute would 28; probably be better implemented using an OI on the upper byte. Do some 29; extra processing so that using FPRs is unequivocally better. 30declare fp128 @llvm.fabs.f128(fp128 %f) 31define void @f3(fp128 *%ptr, fp128 *%ptr2) { 32; CHECK-LABEL: f3: 33; CHECK: lnxbr 34; CHECK: dxbr 35; CHECK: br %r14 36 %orig = load fp128 *%ptr 37 %abs = call fp128 @llvm.fabs.f128(fp128 %orig) 38 %negabs = fsub fp128 0xL00000000000000008000000000000000, %abs 39 %op2 = load fp128 *%ptr2 40 %res = fdiv fp128 %negabs, %op2 41 store fp128 %res, fp128 *%ptr 42 ret void 43} 44