a1710eb3cd
The LIT test cases were migrated with the script provided by Nikita Popov. No manual changes were made. Committed without review since no functional changes, after consultation with uweigand.
64 lines
1.7 KiB
LLVM
64 lines
1.7 KiB
LLVM
; Test moves between FPRs and GPRs for z196 and zEC12.
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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(ptr %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 %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, ptr %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, ptr %ptr
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ret void
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}
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; Like f2, but with a conditional store.
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define void @f3(float %val, ptr %ptr, i32 %which) {
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; CHECK-LABEL: f3:
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; CHECK: ciblh %r3, 0, 0(%r14)
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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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%int = bitcast float %val to i32
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%trunc = trunc i32 %int to i8
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%old = load i8, ptr %ptr
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%cmp = icmp eq i32 %which, 0
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%res = select i1 %cmp, i8 %trunc, i8 %old
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store i8 %res, ptr %ptr
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ret void
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}
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; ...and again with 16-bit memory.
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define void @f4(float %val, ptr %ptr, i32 %which) {
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; CHECK-LABEL: f4:
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; CHECK: ciblh %r3, 0, 0(%r14)
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; CHECK: lgdr [[REG:%r[0-5]]], %f0
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; CHECK: sthh [[REG]], 0(%r2)
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; CHECK: br %r14
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%int = bitcast float %val to i32
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%trunc = trunc i32 %int to i16
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%old = load i16, ptr %ptr
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%cmp = icmp eq i32 %which, 0
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%res = select i1 %cmp, i16 %trunc, i16 %old
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store i16 %res, ptr %ptr
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ret void
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}
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