Add lib calls for float128 operations with no equivalent PPC instruction

[lei]

Summary

Map following instructions to the proper float128 lib calls:

• pow
• powi
• exp
• exp2
• log
• log2
• log10
• sin
• cos
• fmin
• fmax

[nemanjai]

LGTM.

llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp

if (Subtarget.hasP9Vector()) {
         for (MVT FPT : MVT::fp_valuetypes())
           setLoadExtAction(ISD::EXTLOAD, MVT::f128, FPT, Expand);
         setOperationAction(ISD::FMA, MVT::f128, Legal);
         setOperationAction(ISD::FP_ROUND, MVT::f64, Legal);
         setOperationAction(ISD::FP_ROUND, MVT::f32, Legal);
         setTruncStoreAction(MVT::f128, MVT::f64, Expand);
         setTruncStoreAction(MVT::f128, MVT::f32, Expand);
         setOperationAction(ISD::BITCAST, MVT::i128, Custom);
+        // No implementation for these ops for PowerPC.
+        setOperationAction(ISD::FSIN , MVT::f128, Expand);
+        setOperationAction(ISD::FCOS , MVT::f128, Expand);
+        setOperationAction(ISD::FPOW, MVT::f128, Expand);
+        setOperationAction(ISD::FPOWI, MVT::f128, Expand);
       }
 
     }
 
     if (Subtarget.hasP9Altivec()) {
       setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
       setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
     }
if (Subtarget.isDarwin()) {
     setLibcallName(RTLIB::SQRT_PPCF128, "sqrtl$LDBL128");
     setLibcallName(RTLIB::LOG_PPCF128, "logl$LDBL128");
     setLibcallName(RTLIB::LOG2_PPCF128, "log2l$LDBL128");
     setLibcallName(RTLIB::LOG10_PPCF128, "log10l$LDBL128");
     setLibcallName(RTLIB::EXP_PPCF128, "expl$LDBL128");
     setLibcallName(RTLIB::EXP2_PPCF128, "exp2l$LDBL128");
   }
 
+  if (EnableQuadPrecision) {
+    setLibcallName(RTLIB::LOG_F128, "logf128");
+    setLibcallName(RTLIB::LOG2_F128, "log2f128");
+    setLibcallName(RTLIB::LOG10_F128, "log10f128");
+    setLibcallName(RTLIB::EXP_F128, "expf128");
+    setLibcallName(RTLIB::EXP2_F128, "exp2f128");
+    setLibcallName(RTLIB::SIN_F128, "sinf128");
+    setLibcallName(RTLIB::COS_F128, "cosf128");
+    setLibcallName(RTLIB::POW_F128, "powf128");
+    setLibcallName(RTLIB::FMIN_F128, "fminf128");
+    setLibcallName(RTLIB::FMAX_F128, "fmaxf128");
+    setLibcallName(RTLIB::POWI_F128, "__powikf2");
+  }
+
   // With 32 condition bits, we don't need to sink (and duplicate) compares
   // aggressively in CodeGenPrep.
   if (Subtarget.useCRBits()) {
     setHasMultipleConditionRegisters();
     setJumpIsExpensive();
   }
 
   setMinFunctionAlignment(2);

llvm/trunk/test/CodeGen/PowerPC/f128-arith.ll

 ; RUN: llc -mcpu=pwr9 -mtriple=powerpc64le-unknown-unknown \
-; RUN:   -enable-ppc-quad-precision < %s | FileCheck %s
+; RUN:   -enable-ppc-quad-precision -verify-machineinstrs < %s | FileCheck %s
 
 ; Function Attrs: norecurse nounwind
 define void @qpAdd(fp128* nocapture readonly %a, fp128* nocapture %res) {
 entry:
   %0 = load fp128, fp128* %a, align 16
   %add = fadd fp128 %0, %0
   store fp128 %add, fp128* %res, align 16
   ret void
entry:
   ret void
 
 ; CHECK-LABEL: qpNeg
 ; CHECK-NOT: bl __subtf3
 ; CHECK: xsnegqp
 ; CHECK: stxv
 ; CHECK: blr
 }
+
+define fp128 @qp_sin(fp128* nocapture readonly %a) {
+; CHECK-LABEL: qp_sin:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         bl sinf128
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = tail call fp128 @llvm.sin.f128(fp128 %0)
+  ret fp128 %1
+}
+declare fp128 @llvm.sin.f128(fp128 %Val)
+
+define fp128 @qp_cos(fp128* nocapture readonly %a) {
+; CHECK-LABEL: qp_cos:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         bl cosf128
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = tail call fp128 @llvm.cos.f128(fp128 %0)
+  ret fp128 %1
+}
+declare fp128 @llvm.cos.f128(fp128 %Val)
+
+define fp128 @qp_log(fp128* nocapture readonly %a) {
+; CHECK-LABEL: qp_log:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         bl logf128
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = tail call fp128 @llvm.log.f128(fp128 %0)
+  ret fp128 %1
+}
+declare fp128     @llvm.log.f128(fp128 %Val)
+
+define fp128 @qp_log10(fp128* nocapture readonly %a) {
+; CHECK-LABEL: qp_log10:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         bl log10f128
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = tail call fp128 @llvm.log10.f128(fp128 %0)
+  ret fp128 %1
+}
+declare fp128     @llvm.log10.f128(fp128 %Val)
+
+define fp128 @qp_log2(fp128* nocapture readonly %a) {
+; CHECK-LABEL: qp_log2:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         bl log2f128
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = tail call fp128 @llvm.log2.f128(fp128 %0)
+  ret fp128 %1
+}
+declare fp128     @llvm.log2.f128(fp128 %Val)
+
+define fp128 @qp_minnum(fp128* nocapture readonly %a,
+                        fp128* nocapture readonly %b) {
+; CHECK-LABEL: qp_minnum:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         lxv 35, 0(4)
+; CHECK:         bl fminf128
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = load fp128, fp128* %b, align 16
+  %2 = tail call fp128 @llvm.minnum.f128(fp128 %0, fp128 %1)
+  ret fp128 %2
+}
+declare fp128     @llvm.minnum.f128(fp128 %Val0, fp128 %Val1)
+
+define fp128 @qp_maxnum(fp128* nocapture readonly %a,
+                        fp128* nocapture readonly %b) {
+; CHECK-LABEL: qp_maxnum:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         lxv 35, 0(4)
+; CHECK:         bl fmaxf128
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = load fp128, fp128* %b, align 16
+  %2 = tail call fp128 @llvm.maxnum.f128(fp128 %0, fp128 %1)
+  ret fp128 %2
+}
+declare fp128     @llvm.maxnum.f128(fp128 %Val0, fp128 %Val1)
+
+define fp128 @qp_pow(fp128* nocapture readonly %a,
+                     fp128* nocapture readonly %b) {
+; CHECK-LABEL: qp_pow:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         lxv 35, 0(4)
+; CHECK:         bl powf128
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = load fp128, fp128* %b, align 16
+  %2 = tail call fp128 @llvm.pow.f128(fp128 %0, fp128 %1)
+  ret fp128 %2
+}
+declare fp128 @llvm.pow.f128(fp128 %Val, fp128 %Power)
+
+define fp128 @qp_exp(fp128* nocapture readonly %a) {
+; CHECK-LABEL: qp_exp:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         bl expf128
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = tail call fp128 @llvm.exp.f128(fp128 %0)
+  ret fp128 %1
+}
+declare fp128     @llvm.exp.f128(fp128 %Val)
+
+define fp128 @qp_exp2(fp128* nocapture readonly %a) {
+; CHECK-LABEL: qp_exp2:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         bl exp2f128
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = tail call fp128 @llvm.exp2.f128(fp128 %0)
+  ret fp128 %1
+}
+declare fp128     @llvm.exp2.f128(fp128 %Val)
+
+define void @qp_powi(fp128* nocapture readonly %a, i32* nocapture readonly %b,
+                     fp128* nocapture %res) {
+; CHECK-LABEL: qp_powi:
+; CHECK:         lxv 34, 0(3)
+; CHECK:         lwz 3, 0(4)
+; CHECK:         bl __powikf2
+; CHECK:         blr
+entry:
+  %0 = load fp128, fp128* %a, align 16
+  %1 = load i32, i32* %b, align 8
+  %2 = tail call fp128 @llvm.powi.f128(fp128 %0, i32 %1)
+  store fp128 %2, fp128* %res, align 16
+  ret void
+}
+declare fp128 @llvm.powi.f128(fp128 %Val, i32 %power)