[PowerPC] Floating Point Builtins for XL Compat.

This patch is in a series of patches to provide builtins for compatibility with the XL compiler. This patch adds builtins related to floating point operations Reviewed By: #powerpc, nemanjai, amyk, NeHuang Differential Revision: https://reviews.llvm.org/D103986
2026-01-17 14:48:27 +08:00 · 2021-07-21 07:46:22 -05:00
parent 3c3165cfa0
commit e002d251dd
9 changed files with 509 additions and 0 deletions
--- a/clang/include/clang/Basic/BuiltinsPPC.def
+++ b/clang/include/clang/Basic/BuiltinsPPC.def
@@ -47,6 +47,21 @@ BUILTIN(__builtin_ppc_dcbt, "vv*", "")
 BUILTIN(__builtin_ppc_dcbtst, "vv*", "")
 BUILTIN(__builtin_ppc_dcbz, "vv*", "")
 BUILTIN(__builtin_ppc_icbt, "vv*", "")
+BUILTIN(__builtin_ppc_fric, "dd", "")
+BUILTIN(__builtin_ppc_frim, "dd", "")
+BUILTIN(__builtin_ppc_frims, "ff", "")
+BUILTIN(__builtin_ppc_frin, "dd", "")
+BUILTIN(__builtin_ppc_frins, "ff", "")
+BUILTIN(__builtin_ppc_frip, "dd", "")
+BUILTIN(__builtin_ppc_frips, "ff", "")
+BUILTIN(__builtin_ppc_friz, "dd", "")
+BUILTIN(__builtin_ppc_frizs, "ff", "")
+BUILTIN(__builtin_ppc_fsel, "dddd", "")
+BUILTIN(__builtin_ppc_fsels, "ffff", "")
+BUILTIN(__builtin_ppc_frsqrte, "dd", "")
+BUILTIN(__builtin_ppc_frsqrtes, "ff", "")
+BUILTIN(__builtin_ppc_fsqrt, "dd", "")
+BUILTIN(__builtin_ppc_fsqrts, "ff", "")
 BUILTIN(__builtin_ppc_compare_and_swap, "iiD*i*i", "")
 BUILTIN(__builtin_ppc_compare_and_swaplp, "iLiD*Li*Li", "")
 BUILTIN(__builtin_ppc_fetch_and_add, "UiUiD*Ui", "")
--- a/clang/lib/Basic/Targets/PPC.cpp
+++ b/clang/lib/Basic/Targets/PPC.cpp
@@ -220,6 +220,21 @@ static void defineXLCompatMacros(MacroBuilder &Builder) {
  Builder.defineMacro("__mtmsr", "__builtin_ppc_mtmsr");
  Builder.defineMacro("__mfspr", "__builtin_ppc_mfspr");
  Builder.defineMacro("__mtspr", "__builtin_ppc_mtspr");
+  Builder.defineMacro("__fric", "__builtin_ppc_fric");
+  Builder.defineMacro("__frim", "__builtin_ppc_frim");
+  Builder.defineMacro("__frims", "__builtin_ppc_frims");
+  Builder.defineMacro("__frin", "__builtin_ppc_frin");
+  Builder.defineMacro("__frins", "__builtin_ppc_frins");
+  Builder.defineMacro("__frip", "__builtin_ppc_frip");
+  Builder.defineMacro("__frips", "__builtin_ppc_frips");
+  Builder.defineMacro("__friz", "__builtin_ppc_friz");
+  Builder.defineMacro("__frizs", "__builtin_ppc_frizs");
+  Builder.defineMacro("__fsel", "__builtin_ppc_fsel");
+  Builder.defineMacro("__fsels", "__builtin_ppc_fsels");
+  Builder.defineMacro("__frsqrte", "__builtin_ppc_frsqrte");
+  Builder.defineMacro("__frsqrtes", "__builtin_ppc_frsqrtes");
+  Builder.defineMacro("__fsqrt", "__builtin_ppc_fsqrt");
+  Builder.defineMacro("__fsqrts", "__builtin_ppc_fsqrts");
 }

 /// PPCTargetInfo::getTargetDefines - Return a set of the PowerPC-specific
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -15726,6 +15726,41 @@ Value *CodeGenFunction::EmitPPCBuiltinExpr(unsigned BuiltinID,
    Builder.getFastMathFlags() &= (FMF);
    return FDiv;
  }
+  case PPC::BI__builtin_ppc_fric:
+    return RValue::get(emitUnaryMaybeConstrainedFPBuiltin(
+                           *this, E, Intrinsic::rint,
+                           Intrinsic::experimental_constrained_rint))
+        .getScalarVal();
+  case PPC::BI__builtin_ppc_frim:
+  case PPC::BI__builtin_ppc_frims:
+    return RValue::get(emitUnaryMaybeConstrainedFPBuiltin(
+                           *this, E, Intrinsic::floor,
+                           Intrinsic::experimental_constrained_floor))
+        .getScalarVal();
+  case PPC::BI__builtin_ppc_frin:
+  case PPC::BI__builtin_ppc_frins:
+    return RValue::get(emitUnaryMaybeConstrainedFPBuiltin(
+                           *this, E, Intrinsic::round,
+                           Intrinsic::experimental_constrained_round))
+        .getScalarVal();
+  case PPC::BI__builtin_ppc_frip:
+  case PPC::BI__builtin_ppc_frips:
+    return RValue::get(emitUnaryMaybeConstrainedFPBuiltin(
+                           *this, E, Intrinsic::ceil,
+                           Intrinsic::experimental_constrained_ceil))
+        .getScalarVal();
+  case PPC::BI__builtin_ppc_friz:
+  case PPC::BI__builtin_ppc_frizs:
+    return RValue::get(emitUnaryMaybeConstrainedFPBuiltin(
+                           *this, E, Intrinsic::trunc,
+                           Intrinsic::experimental_constrained_trunc))
+        .getScalarVal();
+  case PPC::BI__builtin_ppc_fsqrt:
+  case PPC::BI__builtin_ppc_fsqrts:
+    return RValue::get(emitUnaryMaybeConstrainedFPBuiltin(
+                           *this, E, Intrinsic::sqrt,
+                           Intrinsic::experimental_constrained_sqrt))
+        .getScalarVal();
  }
 }

--- a/clang/test/CodeGen/builtins-ppc-xlcompat-fp.c
+++ b/clang/test/CodeGen/builtins-ppc-xlcompat-fp.c
@@ -0,0 +1,314 @@
+// REQUIRES: powerpc-registered-target
+// RUN: %clang_cc1 -triple powerpc64le-unknown-unknown \
+// RUN:   -emit-llvm %s -o - -target-cpu pwr8 | FileCheck %s
+// RUN: %clang_cc1 -triple powerpc64-unknown-aix \
+// RUN:   -emit-llvm %s -o - -target-cpu pwr7 | FileCheck %s
+// RUN: %clang_cc1 -triple powerpc-unknown-aix \
+// RUN:   -emit-llvm %s -o - -target-cpu pwr7 | FileCheck %s
+
+extern double a;
+extern double b;
+extern double c;
+extern float d;
+extern float e;
+extern float f;
+
+// CHECK-LABEL: @test_fric(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.rint.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_fric() {
+  return __fric(a);
+}
+
+// CHECK-LABEL: @test_frim(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.floor.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_frim() {
+  return __frim(a);
+}
+
+// CHECK-LABEL: @test_frims(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = call float @llvm.floor.f32(float [[TMP1]])
+// CHECK-NEXT:    ret float [[TMP2]]
+//
+float test_frims() {
+  return __frims(d);
+}
+
+// CHECK-LABEL: @test_frin(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.round.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_frin() {
+  return __frin(a);
+}
+
+// CHECK-LABEL: @test_frins(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = call float @llvm.round.f32(float [[TMP1]])
+// CHECK-NEXT:    ret float [[TMP2]]
+//
+float test_frins() {
+  return __frins(d);
+}
+
+// CHECK-LABEL: @test_frip(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.ceil.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_frip() {
+  return __frip(a);
+}
+
+// CHECK-LABEL: @test_frips(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = call float @llvm.ceil.f32(float [[TMP1]])
+// CHECK-NEXT:    ret float [[TMP2]]
+//
+float test_frips() {
+  return __frips(d);
+}
+
+// CHECK-LABEL: @test_friz(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.trunc.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_friz() {
+  return __friz(a);
+}
+
+// CHECK-LABEL: @test_frizs(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = call float @llvm.trunc.f32(float [[TMP1]])
+// CHECK-NEXT:    ret float [[TMP2]]
+//
+float test_frizs() {
+  return __frizs(d);
+}
+
+// CHECK-LABEL: @test_fsel(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @b, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = load double, double* @c, align 8
+// CHECK-NEXT:    [[TMP3:%.*]] = call double @llvm.ppc.fsel(double [[TMP0]], double [[TMP1]], double [[TMP2]])
+// CHECK-NEXT:    ret double [[TMP3]]
+//
+double test_fsel() {
+  return __fsel(a, b, c);
+}
+
+// CHECK-LABEL: @test_fsels(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @e, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = load float, float* @f, align 4
+// CHECK-NEXT:    [[TMP3:%.*]] = call float @llvm.ppc.fsels(float [[TMP0]], float [[TMP1]], float [[TMP2]])
+// CHECK-NEXT:    ret float [[TMP3]]
+//
+float test_fsels() {
+  return __fsels(d, e, f);
+}
+
+// CHECK-LABEL: @test_frsqrte(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = call double @llvm.ppc.frsqrte(double [[TMP0]])
+// CHECK-NEXT:    ret double [[TMP1]]
+//
+double test_frsqrte() {
+  return __frsqrte(a);
+}
+
+// CHECK-LABEL: @test_frsqrtes(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = call float @llvm.ppc.frsqrtes(float [[TMP0]])
+// CHECK-NEXT:    ret float [[TMP1]]
+//
+float test_frsqrtes() {
+  return __frsqrtes(d);
+}
+
+// CHECK-LABEL: @test_fsqrt(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.sqrt.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_fsqrt() {
+  return __fsqrt(a);
+}
+
+// CHECK-LABEL: @test_fsqrts(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = call float @llvm.sqrt.f32(float [[TMP1]])
+// CHECK-NEXT:    ret float [[TMP2]]
+//
+float test_fsqrts() {
+  return __fsqrts(d);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_fric(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.rint.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_builtin_ppc_fric() {
+  return __builtin_ppc_fric(a);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_frim(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.floor.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_builtin_ppc_frim() {
+  return __builtin_ppc_frim(a);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_frims(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = call float @llvm.floor.f32(float [[TMP1]])
+// CHECK-NEXT:    ret float [[TMP2]]
+//
+float test_builtin_ppc_frims() {
+  return __builtin_ppc_frims(d);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_frin(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.round.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_builtin_ppc_frin() {
+  return __builtin_ppc_frin(a);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_frins(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = call float @llvm.round.f32(float [[TMP1]])
+// CHECK-NEXT:    ret float [[TMP2]]
+//
+float test_builtin_ppc_frins() {
+  return __builtin_ppc_frins(d);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_frip(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.ceil.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_builtin_ppc_frip() {
+  return __builtin_ppc_frip(a);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_frips(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = call float @llvm.ceil.f32(float [[TMP1]])
+// CHECK-NEXT:    ret float [[TMP2]]
+//
+float test_builtin_ppc_frips() {
+  return __builtin_ppc_frips(d);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_friz(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.trunc.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_builtin_ppc_friz() {
+  return __builtin_ppc_friz(a);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_frizs(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = call float @llvm.trunc.f32(float [[TMP1]])
+// CHECK-NEXT:    ret float [[TMP2]]
+//
+float test_builtin_ppc_frizs() {
+  return __builtin_ppc_frizs(d);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_fsel(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @b, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = load double, double* @c, align 8
+// CHECK-NEXT:    [[TMP3:%.*]] = call double @llvm.ppc.fsel(double [[TMP0]], double [[TMP1]], double [[TMP2]])
+// CHECK-NEXT:    ret double [[TMP3]]
+//
+double test_builtin_ppc_fsel() {
+  return __builtin_ppc_fsel(a, b, c);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_fsels(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @e, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = load float, float* @f, align 4
+// CHECK-NEXT:    [[TMP3:%.*]] = call float @llvm.ppc.fsels(float [[TMP0]], float [[TMP1]], float [[TMP2]])
+// CHECK-NEXT:    ret float [[TMP3]]
+//
+float test_builtin_ppc_fsels() {
+  return __builtin_ppc_fsels(d, e, f);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_frsqrte(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = call double @llvm.ppc.frsqrte(double [[TMP0]])
+// CHECK-NEXT:    ret double [[TMP1]]
+//
+double test_builtin_ppc_frsqrte() {
+  return __builtin_ppc_frsqrte(a);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_frsqrtes(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = call float @llvm.ppc.frsqrtes(float [[TMP0]])
+// CHECK-NEXT:    ret float [[TMP1]]
+//
+float test_builtin_ppc_frsqrtes() {
+  return __builtin_ppc_frsqrtes(d);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_fsqrt(
+// CHECK:    [[TMP0:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP1:%.*]] = load double, double* @a, align 8
+// CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.sqrt.f64(double [[TMP1]])
+// CHECK-NEXT:    ret double [[TMP2]]
+//
+double test_builtin_ppc_fsqrt() {
+  return __builtin_ppc_fsqrt(a);
+}
+
+// CHECK-LABEL: @test_builtin_ppc_fsqrts(
+// CHECK:    [[TMP0:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP1:%.*]] = load float, float* @d, align 4
+// CHECK-NEXT:    [[TMP2:%.*]] = call float @llvm.sqrt.f32(float [[TMP1]])
+// CHECK-NEXT:    ret float [[TMP2]]
+//
+float test_builtin_ppc_fsqrts() {
+  return __builtin_ppc_fsqrts(d);
+}
--- a/llvm/include/llvm/IR/IntrinsicsPowerPC.td
+++ b/llvm/include/llvm/IR/IntrinsicsPowerPC.td
@@ -1703,6 +1703,17 @@ let TargetPrefix = "ppc" in {
  def int_ppc_fres
      : GCCBuiltin<"__builtin_ppc_fres">,
        Intrinsic <[llvm_float_ty], [llvm_float_ty], [IntrNoMem]>;
+  
+  def int_ppc_fsel : GCCBuiltin<"__builtin_ppc_fsel">,
+                     Intrinsic<[llvm_double_ty], [llvm_double_ty, llvm_double_ty, 
+                                                  llvm_double_ty], [IntrNoMem]>;
+  def int_ppc_fsels : GCCBuiltin<"__builtin_ppc_fsels">,
+                      Intrinsic<[llvm_float_ty], [llvm_float_ty, llvm_float_ty,
+                                                  llvm_float_ty], [IntrNoMem]>;
+  def int_ppc_frsqrte : GCCBuiltin<"__builtin_ppc_frsqrte">,
+                        Intrinsic<[llvm_double_ty], [llvm_double_ty], [IntrNoMem]>;
+  def int_ppc_frsqrtes : GCCBuiltin<"__builtin_ppc_frsqrtes">,
+                         Intrinsic<[llvm_float_ty], [llvm_float_ty], [IntrNoMem]>;
 }

 //===----------------------------------------------------------------------===//
--- a/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
@@ -4983,6 +4983,18 @@ void PPCDAGToDAGISel::Select(SDNode *N) {
    break;

  case ISD::INTRINSIC_WO_CHAIN: {
+    // We emit the PPC::FSELS instruction here because of type conflicts with
+    // the comparison operand. The FSELS instruction is defined to use an 8-byte
+    // comparison like the FSELD version. The fsels intrinsic takes a 4-byte
+    // value for the comparison. When selecting through a .td file, a type
+    // error is raised. Must check this first so we never break on the
+    // !Subtarget->isISA3_1() check.
+    if (N->getConstantOperandVal(0) == Intrinsic::ppc_fsels) {
+      SDValue Ops[] = {N->getOperand(1), N->getOperand(2), N->getOperand(3)};
+      CurDAG->SelectNodeTo(N, PPC::FSELS, MVT::f32, Ops);
+      return;
+    }
+
    if (!Subtarget->isISA3_1())
      break;
    unsigned Opcode = 0;
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
@@ -4409,6 +4409,10 @@ def : Pat<(i1 (not (trunc i32:$in))),
 def : Pat<(i1 (not (trunc i64:$in))),
           (ANDI_rec_1_EQ_BIT8 $in)>;

+def : Pat<(int_ppc_fsel f8rc:$FRA, f8rc:$FRC, f8rc:$FRB), (FSELD $FRA, $FRC, $FRB)>;
+def : Pat<(int_ppc_frsqrte f8rc:$frB), (FRSQRTE $frB)>;
+def : Pat<(int_ppc_frsqrtes f4rc:$frB), (FRSQRTES $frB)>;
+
 //===----------------------------------------------------------------------===//
 // PowerPC Instructions used for assembler/disassembler only
 //
--- a/llvm/lib/Target/PowerPC/PPCInstrVSX.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrVSX.td
@@ -2857,6 +2857,7 @@ def : Pat<(int_ppc_fmsub f64:$A, f64:$B, f64:$C), (XSMSUBMDP $A, $B, $C)>;
 def : Pat<(int_ppc_fnmsub f64:$A, f64:$B, f64:$C), (XSNMSUBMDP $A, $B, $C)>;
 def : Pat<(int_ppc_fnmadd f64:$A, f64:$B, f64:$C), (XSNMADDMDP $A, $B, $C)>;
 def : Pat<(int_ppc_fre f64:$A), (XSREDP $A)>;
+def : Pat<(int_ppc_frsqrte vsfrc:$XB), (XSRSQRTEDP $XB)>;
 } // HasVSX

 // Any big endian VSX subtarget.
@@ -3267,6 +3268,7 @@ def : Pat<(f64 (int_ppc_insert_exp f64:$A, i64:$B)),

 def : Pat<(int_ppc_stfiw ForceXForm:$dst, f64:$XT),
          (STXSIWX f64:$XT, ForceXForm:$dst)>;
+def : Pat<(int_ppc_frsqrtes vssrc:$XB), (XSRSQRTESP $XB)>;
 } // HasVSX, HasP8Vector

 // Any big endian Power8 VSX subtarget.
--- a/llvm/test/CodeGen/builtins-ppc-xlcompat-fp.ll
+++ b/llvm/test/CodeGen/builtins-ppc-xlcompat-fp.ll
@@ -0,0 +1,101 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-unknown \
+; RUN:   -mcpu=pwr7 < %s | FileCheck %s --check-prefix=CHECK-PWR7
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-unknown \
+; RUN:   -mcpu=pwr8 < %s | FileCheck %s --check-prefix=CHECK-PWR8
+; RUN: llc -verify-machineinstrs -mtriple=powerpc-unknown-aix \
+; RUN:   -mcpu=pwr8 < %s | FileCheck %s --check-prefix=CHECK-PWR8
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-unknown \
+; RUN:   -mattr=-vsx -mcpu=pwr8 < %s | FileCheck %s --check-prefix=CHECK-NOVSX
+
+define dso_local double @test_fsel(double %a, double %b, double %c) local_unnamed_addr {
+; CHECK-PWR7-LABEL: test_fsel:
+; CHECK-PWR7:       # %bb.0: # %entry
+; CHECK-PWR7-NEXT:    fsel 1, 1, 2, 3
+; CHECK-PWR7-NEXT:    blr
+;
+; CHECK-PWR8-LABEL: test_fsel:
+; CHECK-PWR8:       # %bb.0: # %entry
+; CHECK-PWR8-NEXT:    fsel 1, 1, 2, 3
+; CHECK-PWR8-NEXT:    blr
+;
+; CHECK-NOVSX-LABEL: test_fsel:
+; CHECK-NOVSX:       # %bb.0: # %entry
+; CHECK-NOVSX-NEXT:    fsel 1, 1, 2, 3
+; CHECK-NOVSX-NEXT:    blr
+
+entry:
+  %0 = tail call double @llvm.ppc.fsel(double %a, double %b, double %c)
+  ret double %0
+}
+
+declare double @llvm.ppc.fsel(double, double, double)
+
+define dso_local float @test_fsels(float %a, float %b, float %c) local_unnamed_addr {
+; CHECK-PWR7-LABEL: test_fsels:
+; CHECK-PWR7:       # %bb.0: # %entry
+; CHECK-PWR7-NEXT:    fsel 1, 1, 2, 3
+; CHECK-PWR7-NEXT:    blr
+;
+; CHECK-PWR8-LABEL: test_fsels:
+; CHECK-PWR8:       # %bb.0: # %entry
+; CHECK-PWR8-NEXT:    fsel 1, 1, 2, 3
+; CHECK-PWR8-NEXT:    blr
+;
+; CHECK-NOVSX-LABEL: test_fsels:
+; CHECK-NOVSX:       # %bb.0: # %entry
+; CHECK-NOVSX-NEXT:    fsel 1, 1, 2, 3
+; CHECK-NOVSX-NEXT:    blr
+
+entry:
+  %0 = tail call float @llvm.ppc.fsels(float %a, float %b, float %c)
+  ret float %0
+}
+
+declare float @llvm.ppc.fsels(float, float, float)
+
+define dso_local double @test_frsqrte(double %a) local_unnamed_addr {
+; CHECK-PWR7-LABEL: test_frsqrte:
+; CHECK-PWR7:       # %bb.0: # %entry
+; CHECK-PWR7-NEXT:    xsrsqrtedp 1, 1
+; CHECK-PWR7-NEXT:    blr
+;
+; CHECK-PWR8-LABEL: test_frsqrte:
+; CHECK-PWR8:       # %bb.0: # %entry
+; CHECK-PWR8-NEXT:    xsrsqrtedp 1, 1
+; CHECK-PWR8-NEXT:    blr
+;
+; CHECK-NOVSX-LABEL: test_frsqrte:
+; CHECK-NOVSX:       # %bb.0: # %entry
+; CHECK-NOVSX-NEXT:    frsqrte 1, 1
+; CHECK-NOVSX-NEXT:    blr
+
+entry:
+  %0 = tail call double @llvm.ppc.frsqrte(double %a)
+  ret double %0
+}
+
+declare double @llvm.ppc.frsqrte(double)
+
+define dso_local float @test_frsqrtes(float %a) local_unnamed_addr {
+; CHECK-PWR7-LABEL: test_frsqrtes:
+; CHECK-PWR7:       # %bb.0: # %entry
+; CHECK-PWR7-NEXT:    frsqrtes 1, 1
+; CHECK-PWR7-NEXT:    blr
+;
+; CHECK-PWR8-LABEL: test_frsqrtes:
+; CHECK-PWR8:       # %bb.0: # %entry
+; CHECK-PWR8-NEXT:    xsrsqrtesp 1, 1
+; CHECK-PWR8-NEXT:    blr
+;
+; CHECK-NOVSX-LABEL: test_frsqrtes:
+; CHECK-NOVSX:       # %bb.0: # %entry
+; CHECK-NOVSX-NEXT:    frsqrtes 1, 1
+; CHECK-NOVSX-NEXT:    blr
+
+entry:
+  %0 = tail call float @llvm.ppc.frsqrtes(float %a)
+  ret float %0
+}
+
+declare float @llvm.ppc.frsqrtes(float)