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LegalizeTypes support for fabs on ppc long double.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53613 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2008-07-15 15:02:44 +00:00
parent 790dd75b97
commit 295a7cddbd
3 changed files with 34 additions and 0 deletions
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14
lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
View File

@ -759,6 +759,7 @@ void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
@ -799,6 +800,19 @@ void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDOperand &Lo,
Lo = Call.getOperand(0); Hi = Call.getOperand(1);
}
void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDOperand &Lo,
SDOperand &Hi) {
assert(N->getValueType(0) == MVT::ppcf128 &&
"Logic only correct for ppcf128!");
SDOperand Tmp;
GetExpandedFloat(N->getOperand(0), Lo, Tmp);
Hi = DAG.getNode(ISD::FABS, Tmp.getValueType(), Tmp);
// Lo = Hi==fabs(Hi) ? Lo : -Lo;
Lo = DAG.getNode(ISD::SELECT_CC, Lo.getValueType(), Tmp, Hi, Lo,
DAG.getNode(ISD::FNEG, Lo.getValueType(), Lo),
DAG.getCondCode(ISD::SETEQ));
}
void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDOperand &Lo,
SDOperand &Hi) {
SDOperand Ops[2] = { N->getOperand(0), N->getOperand(1) };

1
lib/CodeGen/SelectionDAG/LegalizeTypes.h
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@ -367,6 +367,7 @@ private:
// Float Result Expansion.
void ExpandFloatResult(SDNode *N, unsigned ResNo);
void ExpandFloatRes_ConstantFP(SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandFloatRes_FABS (SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandFloatRes_FADD (SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandFloatRes_FDIV (SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandFloatRes_FMUL (SDNode *N, SDOperand &Lo, SDOperand &Hi);

19
test/CodeGen/PowerPC/2008-07-15-Fabs.ll Normal file
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@ -0,0 +1,19 @@
; RUN: llvm-as < %s | llc
target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128"
target triple = "powerpc-apple-darwin9"
define hidden i256 @__divtc3(ppc_fp128 %a, ppc_fp128 %b, ppc_fp128 %c, ppc_fp128 %d) nounwind readnone {
entry:
call ppc_fp128 @fabsl( ppc_fp128 %d ) nounwind readnone ; <ppc_fp128>:0 [#uses=1]
fcmp olt ppc_fp128 0xM00000000000000000000000000000000, %0 ; <i1>:1 [#uses=1]
%.pn106 = select i1 %1, ppc_fp128 %a, ppc_fp128 0xM00000000000000000000000000000000 ; <ppc_fp128> [#uses=1]
%.pn = sub ppc_fp128 0xM00000000000000000000000000000000, %.pn106 ; <ppc_fp128> [#uses=1]
%y.0 = fdiv ppc_fp128 %.pn, 0xM00000000000000000000000000000000 ; <ppc_fp128> [#uses=1]
mul ppc_fp128 %y.0, 0xM3FF00000000000000000000000000000 ; <ppc_fp128>:2 [#uses=1]
add ppc_fp128 %2, mul (ppc_fp128 0xM00000000000000000000000000000000, ppc_fp128 0xM00000000000000000000000000000000) ; <ppc_fp128>:3 [#uses=1]
%tmpi = add ppc_fp128 %3, 0xM00000000000000000000000000000000 ; <ppc_fp128> [#uses=1]
store ppc_fp128 %tmpi, ppc_fp128* null, align 16
ret i256 0
}
declare ppc_fp128 @fabsl(ppc_fp128) nounwind readnone