derek.holloway
7502bf64a4
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25 lines
679 B
LLVM
25 lines
679 B
LLVM
; Test atomic double maximum.
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; Expect a libcall in a compare-and-swap loop.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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define double @f1(ptr %src, double %b) {
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; CHECK-LABEL: f1:
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; CHECK: lgr [[RB:%r[0-9]+]], %r2
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; CHECK: ld [[FB:%f[0-9]+]], 0(%r2)
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; CHECK: ldr [[FSRC:%f[0-9]+]], %f0
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; CHECK: [[L:\.L.+]]:
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; CHECK: ldr %f0, [[FB]]
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; CHECK: ldr %f2, [[FSRC]]
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; CHECK: brasl %r14, fmax@PLT
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; CHECK: lgdr [[RO:%r[0-9]+]], %f0
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; CHECK: lgdr [[RI:%r[0-9]+]], [[FB]]
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; CHECK: csg [[RI]], [[RO]], 0([[RB]])
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; CHECK: ldgr [[FB]], [[RI]]
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; CHECK: jl [[L]]
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; CHECK: ldr %f0, [[FB]]
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; CHECK: br %r14
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%res = atomicrmw fmax ptr %src, double %b seq_cst
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ret double %res
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}
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