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Diffstat (limited to 'test/CodeGen/SystemZ/fp-abs-02.ll')
-rw-r--r-- | test/CodeGen/SystemZ/fp-abs-02.ll | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/fp-abs-02.ll b/test/CodeGen/SystemZ/fp-abs-02.ll new file mode 100644 index 0000000000..513d49c7ac --- /dev/null +++ b/test/CodeGen/SystemZ/fp-abs-02.ll @@ -0,0 +1,43 @@ +; Test negated floating-point absolute. +; +; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s + +; Test f32. +declare float @llvm.fabs.f32(float %f) +define float @f1(float %f) { +; CHECK: f1: +; CHECK: lnebr %f0, %f0 +; CHECK: br %r14 + %abs = call float @llvm.fabs.f32(float %f) + %res = fsub float -0.0, %abs + ret float %res +} + +; Test f64. +declare double @llvm.fabs.f64(double %f) +define double @f2(double %f) { +; CHECK: f2: +; CHECK: lndbr %f0, %f0 +; CHECK: br %r14 + %abs = call double @llvm.fabs.f64(double %f) + %res = fsub double -0.0, %abs + ret double %res +} + +; Test f128. With the loads and stores, a pure negative-absolute would +; probably be better implemented using an OI on the upper byte. Do some +; extra processing so that using FPRs is unequivocally better. +declare fp128 @llvm.fabs.f128(fp128 %f) +define void @f3(fp128 *%ptr, fp128 *%ptr2) { +; CHECK: f3: +; CHECK: lnxbr +; CHECK: dxbr +; CHECK: br %r14 + %orig = load fp128 *%ptr + %abs = call fp128 @llvm.fabs.f128(fp128 %orig) + %negabs = fsub fp128 0xL00000000000000008000000000000000, %abs + %op2 = load fp128 *%ptr2 + %res = fdiv fp128 %negabs, %op2 + store fp128 %res, fp128 *%ptr + ret void +} |