[llvm-commits] [llvm] r53613 - in /llvm/trunk: lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp lib/CodeGen/SelectionDAG/LegalizeTypes.h test/CodeGen/PowerPC/2008-07-15-Fabs.ll

[Duncan Sands]

Author: baldrick
Date: Tue Jul 15 10:02:44 2008
New Revision: 53613

URL: http://llvm.org/viewvc/llvm-project?rev=53613&view=rev
Log:
LegalizeTypes support for fabs on ppc long double.

Added:
    llvm/trunk/test/CodeGen/PowerPC/2008-07-15-Fabs.ll
Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
    llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeTypes.h

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp?rev=53613&r1=53612&r2=53613&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp Tue Jul 15 10:02:44 2008
@@ -759,6 +759,7 @@
   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 @@
   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) };

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeTypes.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeTypes.h?rev=53613&r1=53612&r2=53613&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeTypes.h (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeTypes.h Tue Jul 15 10:02:44 2008
@@ -367,6 +367,7 @@
   // 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);

Added: llvm/trunk/test/CodeGen/PowerPC/2008-07-15-Fabs.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/2008-07-15-Fabs.ll?rev=53613&view=auto

==============================================================================
--- llvm/trunk/test/CodeGen/PowerPC/2008-07-15-Fabs.ll (added)
+++ llvm/trunk/test/CodeGen/PowerPC/2008-07-15-Fabs.ll Tue Jul 15 10:02:44 2008
@@ -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