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X86: support fpext/fptrunc operations to and from 16-bit floats.

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llvm-svn: 213374
This commit is contained in:
Tim Northover 2014-07-18 13:01:25 +00:00
parent 25c770b7c4
commit 07cb1b71c9
2 changed files with 47 additions and 0 deletions
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5
lib/Target/X86/X86ISelLowering.cpp
View File

@ -529,6 +529,11 @@ void X86TargetLowering::resetOperationActions() {
setOperationAction(ISD::FP_TO_FP16, MVT::f64, Expand);
setOperationAction(ISD::FP_TO_FP16, MVT::f80, Expand);
setLoadExtAction(ISD::EXTLOAD, MVT::f16, Expand);
setTruncStoreAction(MVT::f32, MVT::f16, Expand);
setTruncStoreAction(MVT::f64, MVT::f16, Expand);
setTruncStoreAction(MVT::f80, MVT::f16, Expand);
if (Subtarget->hasPOPCNT()) {
setOperationAction(ISD::CTPOP , MVT::i8 , Promote);
} else {

42
test/CodeGen/X86/half.ll
View File

@ -25,3 +25,45 @@ define void @test_bitcast_to_half(half* %addr, i16 %in) {
store half %val_fp, half* %addr
ret void
}
define float @test_extend32(half* %addr) {
; CHECK-LABEL: test_extend32:
; CHECK-LIBCALL: jmp __gnu_h2f_ieee
; CHECK-FP16: vcvtph2ps
%val16 = load half* %addr
%val32 = fpext half %val16 to float
ret float %val32
}
define double @test_extend64(half* %addr) {
; CHECK-LABEL: test_extend64:
; CHECK-LIBCALL: callq __gnu_h2f_ieee
; CHECK-LIBCALL: cvtss2sd
; CHECK-FP16: vcvtph2ps
; CHECK-FP16: vcvtss2sd
%val16 = load half* %addr
%val32 = fpext half %val16 to double
ret double %val32
}
define void @test_trunc32(float %in, half* %addr) {
; CHECK-LABEL: test_trunc32:
; CHECK-LIBCALL: callq __gnu_f2h_ieee
; CHECK-FP16: vcvtps2ph
%val16 = fptrunc float %in to half
store half %val16, half* %addr
ret void
}
define void @test_trunc64(double %in, half* %addr) {
; CHECK-LABEL: test_trunc64:
; CHECK-LIBCALL: callq __truncdfhf2
; CHECK-FP16: callq __truncdfhf2
%val16 = fptrunc double %in to half
store half %val16, half* %addr
ret void
}