fp-strict-cmps-03.ll
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; Test 128-bit floating-point signaling comparison. The tests assume a z10
; implementation of select, using conditional branches rather than LOCGR.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
; There is no memory form of 128-bit comparison.
define i64 @f1(i64 %a, i64 %b, fp128 *%ptr, float %f2) #0 {
; CHECK-LABEL: f1:
; CHECK-DAG: lxebr %f0, %f0
; CHECK-DAG: ld %f1, 0(%r4)
; CHECK-DAG: ld %f3, 8(%r4)
; CHECK: kxbr %f1, %f0
; CHECK-NEXT: ber %r14
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%f2x = fpext float %f2 to fp128
%f1 = load fp128, fp128 *%ptr
%cond = call i1 @llvm.experimental.constrained.fcmps.f128(
fp128 %f1, fp128 %f2x,
metadata !"oeq",
metadata !"fpexcept.strict") #0
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check comparison with zero - cannot use LOAD AND TEST.
define i64 @f2(i64 %a, i64 %b, fp128 *%ptr) #0 {
; CHECK-LABEL: f2:
; CHECK-DAG: ld %f0, 0(%r4)
; CHECK-DAG: ld %f2, 8(%r4)
; CHECK-DAG: lzxr [[REG:%f[0-9]+]]
; CHECK-NEXT: kxbr %f0, [[REG]]
; CHECK-NEXT: ber %r14
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%f = load fp128, fp128 *%ptr
%cond = call i1 @llvm.experimental.constrained.fcmps.f128(
fp128 %f, fp128 0xL00000000000000000000000000000000,
metadata !"oeq",
metadata !"fpexcept.strict") #0
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
attributes #0 = { strictfp }
declare i1 @llvm.experimental.constrained.fcmps.f128(fp128, fp128, metadata, metadata)