1 ; Test 128-bit floating-point signaling comparison. The tests assume a z10
2 ; implementation of select, using conditional branches rather than LOCGR.
4 ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
6 ; There is no memory form of 128-bit comparison.
7 define i64 @f1(i64 %a, i64 %b, ptr %ptr, float %f2) #0 {
9 ; CHECK-DAG: lxebr %f0, %f0
10 ; CHECK-DAG: ld %f1, 0(%r4)
11 ; CHECK-DAG: ld %f3, 8(%r4)
12 ; CHECK: kxbr %f1, %f0
13 ; CHECK-NEXT: ber %r14
16 %f2x = fpext float %f2 to fp128
17 %f1 = load fp128, ptr %ptr
18 %cond = call i1 @llvm.experimental.constrained.fcmps.f128(
19 fp128 %f1, fp128 %f2x,
21 metadata !"fpexcept.strict") #0
22 %res = select i1 %cond, i64 %a, i64 %b
26 ; Check comparison with zero - cannot use LOAD AND TEST.
27 define i64 @f2(i64 %a, i64 %b, ptr %ptr) #0 {
29 ; CHECK-DAG: ld %f0, 0(%r4)
30 ; CHECK-DAG: ld %f2, 8(%r4)
31 ; CHECK-DAG: lzxr [[REG:%f[0-9]+]]
32 ; CHECK-NEXT: kxbr %f0, [[REG]]
33 ; CHECK-NEXT: ber %r14
36 %f = load fp128, ptr %ptr
37 %cond = call i1 @llvm.experimental.constrained.fcmps.f128(
38 fp128 %f, fp128 0xL00000000000000000000000000000000,
40 metadata !"fpexcept.strict") #0
41 %res = select i1 %cond, i64 %a, i64 %b
45 attributes #0 = { strictfp }
47 declare i1 @llvm.experimental.constrained.fcmps.f128(fp128, fp128, metadata, metadata)