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R600: Implement 64bit SHL 

v2: Use c++ style comment

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 211157
This commit is contained in:
Jan Vesely 2014-06-18 12:27:13 +00:00
parent 4ea1647e8b
commit 25f362766e
3 changed files with 157 additions and 2 deletions
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41
llvm/lib/Target/R600/R600ISelLowering.cpp
View File

@ -157,6 +157,10 @@ R600TargetLowering::R600TargetLowering(TargetMachine &TM) :
setOperationAction(ISD::UDIV, MVT::i64, Custom);
setOperationAction(ISD::UREM, MVT::i64, Custom);
// We don't have 64-bit shifts. Thus we need either SHX i64 or SHX_PARTS i32
// to be Legal/Custom in order to avoid library calls.
setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
setBooleanContents(ZeroOrNegativeOneBooleanContent);
@ -552,6 +556,7 @@ SDValue R600TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const
default: return AMDGPUTargetLowering::LowerOperation(Op, DAG);
case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
case ISD::SHL_PARTS: return LowerSHLParts(Op, DAG);
case ISD::FCOS:
case ISD::FSIN: return LowerTrig(Op, DAG);
case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
@ -905,6 +910,42 @@ SDValue R600TargetLowering::LowerTrig(SDValue Op, SelectionDAG &DAG) const {
DAG.getConstantFP(3.14159265359, MVT::f32));
}
SDValue R600TargetLowering::LowerSHLParts(SDValue Op, SelectionDAG &DAG) const {
SDLoc DL(Op);
EVT VT = Op.getValueType();
SDValue Lo = Op.getOperand(0);
SDValue Hi = Op.getOperand(1);
SDValue Shift = Op.getOperand(2);
SDValue Zero = DAG.getConstant(0, VT);
SDValue One = DAG.getConstant(1, VT);
SDValue Width = DAG.getConstant(VT.getSizeInBits(), VT);
SDValue Width1 = DAG.getConstant(VT.getSizeInBits() - 1, VT);
SDValue BigShift = DAG.getNode(ISD::SUB, DL, VT, Shift, Width);
SDValue CompShift = DAG.getNode(ISD::SUB, DL, VT, Width1, Shift);
// The dance around Width1 is necessary for 0 special case.
// Without it the CompShift might be 32, producing incorrect results in
// Overflow. So we do the shift in two steps, the alternative is to
// add a conditional to filter the special case.
SDValue Overflow = DAG.getNode(ISD::SRL, DL, VT, Lo, CompShift);
Overflow = DAG.getNode(ISD::SRL, DL, VT, Overflow, One);
SDValue HiSmall = DAG.getNode(ISD::SHL, DL, VT, Hi, Shift);
HiSmall = DAG.getNode(ISD::OR, DL, VT, HiSmall, Overflow);
SDValue LoSmall = DAG.getNode(ISD::SHL, DL, VT, Lo, Shift);
SDValue HiBig = DAG.getNode(ISD::SHL, DL, VT, Lo, BigShift);
SDValue LoBig = Zero;
Hi = DAG.getSelectCC(DL, Shift, Width, HiSmall, HiBig, ISD::SETULT);
Lo = DAG.getSelectCC(DL, Shift, Width, LoSmall, LoBig, ISD::SETULT);
return DAG.getNode(ISD::MERGE_VALUES, DL, DAG.getVTList(VT,VT), Lo, Hi);
}
SDValue R600TargetLowering::LowerFPTOUINT(SDValue Op, SelectionDAG &DAG) const {
return DAG.getNode(
ISD::SETCC,

1
llvm/lib/Target/R600/R600ISelLowering.h
View File

@ -60,6 +60,7 @@ private:
SDValue LowerFPTOUINT(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerTrig(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSHLParts(SDValue Op, SelectionDAG &DAG) const;
SDValue stackPtrToRegIndex(SDValue Ptr, unsigned StackWidth,
SelectionDAG &DAG) const;

117
llvm/test/CodeGen/R600/shl.ll
View File

@ -39,5 +39,118 @@ define void @shl_v4i32(<4 x i32> addrspace(1)* %out, <4 x i32> addrspace(1)* %in
ret void
}
; XXX: Add SI test for i64 shl once i64 stores and i64 function arguments are
; supported.
;EG-CHECK: @shl_i64
;EG-CHECK: SUB_INT {{\*? *}}[[COMPSH:T[0-9]+\.[XYZW]]], {{literal.[xy]}}, [[SHIFT:T[0-9]+\.[XYZW]]]
;EG-CHECK: LSHR {{\* *}}[[TEMP:T[0-9]+\.[XYZW]]], [[OPLO:T[0-9]+\.[XYZW]]], {{[[COMPSH]]|PV.[XYZW]}}
;EG-CHECK: LSHR {{\*? *}}[[OVERF:T[0-9]+\.[XYZW]]], {{[[TEMP]]|PV.[XYZW]}}, 1
;EG_CHECK-DAG: ADD_INT {{\*? *}}[[BIGSH:T[0-9]+\.[XYZW]]], [[SHIFT]], literal
;EG-CHECK-DAG: LSHL {{\*? *}}[[HISMTMP:T[0-9]+\.[XYZW]]], [[OPHI:T[0-9]+\.[XYZW]]], [[SHIFT]]
;EG-CHECK-DAG: OR_INT {{\*? *}}[[HISM:T[0-9]+\.[XYZW]]], {{[[HISMTMP]]|PV.[XYZW]}}, {{[[OVERF]]|PV.[XYZW]}}
;EG-CHECK-DAG: LSHL {{\*? *}}[[LOSM:T[0-9]+\.[XYZW]]], [[OPLO]], {{PS|[[SHIFT]]}}
;EG-CHECK-DAG: SETGT_UINT {{\*? *}}[[RESC:T[0-9]+\.[XYZW]]], [[SHIFT]], literal
;EG-CHECK-DAG: CNDE_INT {{\*? *}}[[RESLO:T[0-9]+\.[XYZW]]], {{T[0-9]+\.[XYZW]}}
;EG-CHECK-DAG: CNDE_INT {{\*? *}}[[RESHI:T[0-9]+\.[XYZW]]], {{T[0-9]+\.[XYZW], .*}}, 0.0
;SI-CHECK: @shl_i64
;SI-CHECK: V_LSHL_B64 {{v\[[0-9]+:[0-9]+\], v\[[0-9]+:[0-9]+\], v[0-9]+}}
define void @shl_i64(i64 addrspace(1)* %out, i64 addrspace(1)* %in) {
%b_ptr = getelementptr i64 addrspace(1)* %in, i64 1
%a = load i64 addrspace(1) * %in
%b = load i64 addrspace(1) * %b_ptr
%result = shl i64 %a, %b
store i64 %result, i64 addrspace(1)* %out
ret void
}
;EG-CHECK: @shl_v2i64
;EG-CHECK-DAG: SUB_INT {{\*? *}}[[COMPSHA:T[0-9]+\.[XYZW]]], {{literal.[xy]}}, [[SHA:T[0-9]+\.[XYZW]]]
;EG-CHECK-DAG: SUB_INT {{\*? *}}[[COMPSHB:T[0-9]+\.[XYZW]]], {{literal.[xy]}}, [[SHB:T[0-9]+\.[XYZW]]]
;EG-CHECK-DAG: LSHR {{\*? *}}[[COMPSHA]]
;EG-CHECK-DAG: LSHR {{\*? *}}[[COMPSHB]]
;EG-CHECK-DAG: LSHR {{.*}}, 1
;EG-CHECK-DAG: LSHR {{.*}}, 1
;EG-CHECK-DAG: ADD_INT {{\*? *}}[[BIGSHA:T[0-9]+\.[XYZW]]]{{.*}}, literal
;EG-CHECK-DAG: ADD_INT {{\*? *}}[[BIGSHB:T[0-9]+\.[XYZW]]]{{.*}}, literal
;EG-CHECK-DAG: LSHL {{.*}}, [[SHA]]
;EG-CHECK-DAG: LSHL {{.*}}, [[SHB]]
;EG-CHECK-DAG: LSHL {{.*}}, [[SHA]]
;EG-CHECK-DAG: LSHL {{.*}}, [[SHB]]
;EG-CHECK-DAG: LSHL
;EG-CHECK-DAG: LSHL
;EG-CHECK-DAG: SETGT_UINT {{\*? *T[0-9]\.[XYZW]}}, [[SHA]], literal
;EG-CHECK-DAG: SETGT_UINT {{\*? *T[0-9]\.[XYZW]}}, [[SHB]], literal
;EG-CHECK-DAG: CNDE_INT {{.*}}, 0.0
;EG-CHECK-DAG: CNDE_INT {{.*}}, 0.0
;EG-CHECK-DAG: CNDE_INT
;EG-CHECK-DAG: CNDE_INT
;SI-CHECK: @shl_v2i64
;SI-CHECK: V_LSHL_B64 {{v\[[0-9]+:[0-9]+\], v\[[0-9]+:[0-9]+\], v[0-9]+}}
;SI-CHECK: V_LSHL_B64 {{v\[[0-9]+:[0-9]+\], v\[[0-9]+:[0-9]+\], v[0-9]+}}
define void @shl_v2i64(<2 x i64> addrspace(1)* %out, <2 x i64> addrspace(1)* %in) {
%b_ptr = getelementptr <2 x i64> addrspace(1)* %in, i64 1
%a = load <2 x i64> addrspace(1) * %in
%b = load <2 x i64> addrspace(1) * %b_ptr
%result = shl <2 x i64> %a, %b
store <2 x i64> %result, <2 x i64> addrspace(1)* %out
ret void
}
;EG-CHECK: @shl_v4i64
;EG-CHECK-DAG: SUB_INT {{\*? *}}[[COMPSHA:T[0-9]+\.[XYZW]]], {{literal.[xy]}}, [[SHA:T[0-9]+\.[XYZW]]]
;EG-CHECK-DAG: SUB_INT {{\*? *}}[[COMPSHB:T[0-9]+\.[XYZW]]], {{literal.[xy]}}, [[SHB:T[0-9]+\.[XYZW]]]
;EG-CHECK-DAG: SUB_INT {{\*? *}}[[COMPSHC:T[0-9]+\.[XYZW]]], {{literal.[xy]}}, [[SHC:T[0-9]+\.[XYZW]]]
;EG-CHECK-DAG: SUB_INT {{\*? *}}[[COMPSHD:T[0-9]+\.[XYZW]]], {{literal.[xy]}}, [[SHD:T[0-9]+\.[XYZW]]]
;EG-CHECK-DAG: LSHR {{\*? *}}[[COMPSHA]]
;EG-CHECK-DAG: LSHR {{\*? *}}[[COMPSHB]]
;EG-CHECK-DAG: LSHR {{\*? *}}[[COMPSHC]]
;EG-CHECK-DAG: LSHR {{\*? *}}[[COMPSHD]]
;EG-CHECK-DAG: LSHR {{.*}}, 1
;EG-CHECK-DAG: LSHR {{.*}}, 1
;EG-CHECK-DAG: LSHR {{.*}}, 1
;EG-CHECK-DAG: LSHR {{.*}}, 1
;EG-CHECK-DAG: ADD_INT {{\*? *}}[[BIGSHA:T[0-9]+\.[XYZW]]]{{.*}}, literal
;EG-CHECK-DAG: ADD_INT {{\*? *}}[[BIGSHB:T[0-9]+\.[XYZW]]]{{.*}}, literal
;EG-CHECK-DAG: ADD_INT {{\*? *}}[[BIGSHC:T[0-9]+\.[XYZW]]]{{.*}}, literal
;EG-CHECK-DAG: ADD_INT {{\*? *}}[[BIGSHD:T[0-9]+\.[XYZW]]]{{.*}}, literal
;EG-CHECK-DAG: LSHL {{.*}}, [[SHA]]
;EG-CHECK-DAG: LSHL {{.*}}, [[SHB]]
;EG-CHECK-DAG: LSHL {{.*}}, [[SHC]]
;EG-CHECK-DAG: LSHL {{.*}}, [[SHD]]
;EG-CHECK-DAG: LSHL {{.*}}, [[SHA]]
;EG-CHECK-DAG: LSHL {{.*}}, [[SHB]]
;EG-CHECK-DAG: LSHL {{.*}}, [[SHC]]
;EG-CHECK-DAG: LSHL {{.*}}, [[SHD]]
;EG-CHECK-DAG: LSHL
;EG-CHECK-DAG: LSHL
;EG-CHECK-DAG: LSHL
;EG-CHECK-DAG: LSHL
;EG-CHECK-DAG: SETGT_UINT {{\*? *T[0-9]\.[XYZW]}}, [[SHA]], literal
;EG-CHECK-DAG: SETGT_UINT {{\*? *T[0-9]\.[XYZW]}}, [[SHB]], literal
;EG-CHECK-DAG: SETGT_UINT {{\*? *T[0-9]\.[XYZW]}}, [[SHC]], literal
;EG-CHECK-DAG: SETGT_UINT {{\*? *T[0-9]\.[XYZW]}}, [[SHD]], literal
;EG-CHECK-DAG: CNDE_INT {{.*}}, 0.0
;EG-CHECK-DAG: CNDE_INT {{.*}}, 0.0
;EG-CHECK-DAG: CNDE_INT {{.*}}, 0.0
;EG-CHECK-DAG: CNDE_INT {{.*}}, 0.0
;EG-CHECK-DAG: CNDE_INT
;EG-CHECK-DAG: CNDE_INT
;EG-CHECK-DAG: CNDE_INT
;EG-CHECK-DAG: CNDE_INT
;SI-CHECK: @shl_v4i64
;SI-CHECK: V_LSHL_B64 {{v\[[0-9]+:[0-9]+\], v\[[0-9]+:[0-9]+\], v[0-9]+}}
;SI-CHECK: V_LSHL_B64 {{v\[[0-9]+:[0-9]+\], v\[[0-9]+:[0-9]+\], v[0-9]+}}
;SI-CHECK: V_LSHL_B64 {{v\[[0-9]+:[0-9]+\], v\[[0-9]+:[0-9]+\], v[0-9]+}}
;SI-CHECK: V_LSHL_B64 {{v\[[0-9]+:[0-9]+\], v\[[0-9]+:[0-9]+\], v[0-9]+}}
define void @shl_v4i64(<4 x i64> addrspace(1)* %out, <4 x i64> addrspace(1)* %in) {
%b_ptr = getelementptr <4 x i64> addrspace(1)* %in, i64 1
%a = load <4 x i64> addrspace(1) * %in
%b = load <4 x i64> addrspace(1) * %b_ptr
%result = shl <4 x i64> %a, %b
store <4 x i64> %result, <4 x i64> addrspace(1)* %out
ret void
}