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101 lines
2.6 KiB
LLVM
101 lines
2.6 KiB
LLVM
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; RUN: llc -O3 -mtriple=armv8a-none-eabi -mattr=+fullfp16 -o - %s | FileCheck %s
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; RUN: llc -O3 -mtriple=thumbv8a-none-eabi -mattr=+fullfp16 -arm-no-restrict-it -o - %s | FileCheck %s
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; Require the vmul.f16 not to be predicated, because it's illegal to
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; do so with fp16 instructions
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define half @conditional_fmul_f16(half* %p) {
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; CHECK-LABEL: conditional_fmul_f16:
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; CHECK: vmul.f16
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entry:
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%p1 = getelementptr half, half* %p, i32 1
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%a = load half, half* %p, align 2
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%threshold = load half, half* %p1, align 2
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%flag = fcmp ogt half %a, %threshold
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br i1 %flag, label %mul, label %out
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mul:
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%p2 = getelementptr half, half* %p, i32 2
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%mult = load half, half* %p2, align 2
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%b = fmul half %a, %mult
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br label %out
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out:
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%sel = phi half [ %a, %entry ], [ %b, %mul ]
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ret half %sel
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}
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; Expect that the corresponding vmul.f32 _will_ be predicated (to make
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; sure the previous test is really testing something)
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define float @conditional_fmul_f32(float* %p) {
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; CHECK-LABEL: conditional_fmul_f32:
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; CHECK: vmulgt.f32
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entry:
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%p1 = getelementptr float, float* %p, i32 1
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%a = load float, float* %p, align 2
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%threshold = load float, float* %p1, align 2
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%flag = fcmp ogt float %a, %threshold
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br i1 %flag, label %mul, label %out
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mul:
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%p2 = getelementptr float, float* %p, i32 2
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%mult = load float, float* %p2, align 2
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%b = fmul float %a, %mult
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br label %out
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out:
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%sel = phi float [ %a, %entry ], [ %b, %mul ]
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ret float %sel
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}
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; Require the two comparisons to be done with unpredicated vcmp.f16
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; instructions (again, it is illegal to predicate them)
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define void @chained_comparisons_f16(half* %p) {
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; CHECK-LABEL: chained_comparisons_f16:
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; CHECK: vcmp.f16
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; CHECK: vcmp.f16
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entry:
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%p1 = getelementptr half, half* %p, i32 1
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%a = load half, half* %p, align 2
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%b = load half, half* %p1, align 2
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%aflag = fcmp oeq half %a, 0xH0000
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%bflag = fcmp oeq half %b, 0xH0000
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%flag = or i1 %aflag, %bflag
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br i1 %flag, label %call, label %out
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call:
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call void @external_function()
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br label %out
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out:
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ret void
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}
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; Again, do the corresponding test with 32-bit floats and check that
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; the second comparison _is_ predicated on the result of the first.
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define void @chained_comparisons_f32(float* %p) {
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; CHECK-LABEL: chained_comparisons_f32:
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; CHECK: vcmp.f32
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; CHECK: vcmpne.f32
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entry:
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%p1 = getelementptr float, float* %p, i32 1
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%a = load float, float* %p, align 2
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%b = load float, float* %p1, align 2
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%aflag = fcmp oeq float %a, 0x00000000
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%bflag = fcmp oeq float %b, 0x00000000
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%flag = or i1 %aflag, %bflag
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br i1 %flag, label %call, label %out
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call:
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call void @external_function()
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br label %out
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out:
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ret void
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}
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declare void @external_function()
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