forked from OSchip/llvm-project
31 lines
878 B
LLVM
31 lines
878 B
LLVM
; Test moves between FPRs and GPRs for z196 and above.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
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; Check that moves from i32s to floats can use high registers.
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define float @f1(i16 *%ptr) {
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; CHECK-LABEL: f1:
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; CHECK: llhh [[REG:%r[0-5]]], 0(%r2)
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; CHECK: oihh [[REG]], 16256
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; CHECK: ldgr %f0, [[REG]]
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; CHECK: br %r14
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%base = load i16 *%ptr
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%ext = zext i16 %base to i32
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%full = or i32 %ext, 1065353216
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%res = bitcast i32 %full to float
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ret float %res
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}
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; Check that moves from floats to i32s can use high registers.
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; This "store the low byte" technique is used by llvmpipe, for example.
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define void @f2(float %val, i8 *%ptr) {
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; CHECK-LABEL: f2:
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; CHECK: lgdr [[REG:%r[0-5]]], %f0
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; CHECK: stch [[REG]], 0(%r2)
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; CHECK: br %r14
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%res = bitcast float %val to i32
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%trunc = trunc i32 %res to i8
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store i8 %trunc, i8 *%ptr
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ret void
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}
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