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