diff options
Diffstat (limited to 'clang/lib/CodeGen')
| -rw-r--r-- | clang/lib/CodeGen/CGBuiltin.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp index 00020584955..4331005cb35 100644 --- a/clang/lib/CodeGen/CGBuiltin.cpp +++ b/clang/lib/CodeGen/CGBuiltin.cpp @@ -9256,6 +9256,33 @@ Value *CodeGenFunction::EmitX86BuiltinExpr(unsigned BuiltinID, makeArrayRef(Indices, NumElts), "blend"); } + case X86::BI__builtin_ia32_vpermilpd: + case X86::BI__builtin_ia32_vpermilps: + case X86::BI__builtin_ia32_vpermilpd256: + case X86::BI__builtin_ia32_vpermilps256: + case X86::BI__builtin_ia32_vpermilpd512: + case X86::BI__builtin_ia32_vpermilps512: { + uint32_t Imm = cast<llvm::ConstantInt>(Ops[1])->getZExtValue(); + llvm::Type *Ty = Ops[0]->getType(); + unsigned NumElts = Ty->getVectorNumElements(); + unsigned NumLanes = Ty->getPrimitiveSizeInBits() / 128; + unsigned NumLaneElts = NumElts / NumLanes; + + // Splat the 8-bits of immediate 4 times to help the loop wrap around. + Imm = (Imm & 0xff) * 0x01010101; + + uint32_t Indices[16]; + for (unsigned l = 0; l != NumElts; l += NumLaneElts) { + for (unsigned i = 0; i != NumLaneElts; ++i) { + Indices[i + l] = (Imm % NumLaneElts) + l; + Imm /= NumLaneElts; + } + } + + return Builder.CreateShuffleVector(Ops[0], UndefValue::get(Ty), + makeArrayRef(Indices, NumElts), + "permil"); + } case X86::BI__builtin_ia32_palignr128: case X86::BI__builtin_ia32_palignr256: case X86::BI__builtin_ia32_palignr512: { |
