llvm/Support/X86FoldTablesUtils.h

0001 //===-- X86FoldTablesUtils.h ------------------------------------*- C++ -*-===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef LLVM_SUPPORT_X86FOLDTABLESUTILS_H
0010 #define LLVM_SUPPORT_X86FOLDTABLESUTILS_H
0011
0012 namespace llvm {
0013 enum {
0014   // Select which memory operand is being unfolded.
0015   // (stored in bits 0 - 2)
0016   TB_INDEX_0 = 0,
0017   TB_INDEX_1 = 1,
0018   TB_INDEX_2 = 2,
0019   TB_INDEX_3 = 3,
0020   TB_INDEX_4 = 4,
0021   TB_INDEX_MASK = 0x7,
0022
0023   // Do not insert the reverse map (MemOp -> RegOp) into the table.
0024   // This may be needed because there is a many -> one mapping.
0025   TB_NO_REVERSE = 1 << 3,
0026
0027   // Do not insert the forward map (RegOp -> MemOp) into the table.
0028   // This is needed for Native Client, which prohibits branch
0029   // instructions from using a memory operand.
0030   TB_NO_FORWARD = 1 << 4,
0031
0032   TB_FOLDED_LOAD = 1 << 5,
0033   TB_FOLDED_STORE = 1 << 6,
0034
0035   // Minimum alignment required for load/store.
0036   // Used for RegOp->MemOp conversion. Encoded as Log2(Align)
0037   // (stored in bits 8 - 10)
0038   TB_ALIGN_SHIFT = 7,
0039   TB_ALIGN_1 = 0 << TB_ALIGN_SHIFT,
0040   TB_ALIGN_16 = 4 << TB_ALIGN_SHIFT,
0041   TB_ALIGN_32 = 5 << TB_ALIGN_SHIFT,
0042   TB_ALIGN_64 = 6 << TB_ALIGN_SHIFT,
0043   TB_ALIGN_MASK = 0x7 << TB_ALIGN_SHIFT,
0044
0045   // Broadcast type.
0046   // (stored in bits 11 - 13)
0047   TB_BCAST_TYPE_SHIFT = TB_ALIGN_SHIFT + 3,
0048   TB_BCAST_W = 1 << TB_BCAST_TYPE_SHIFT,
0049   TB_BCAST_D = 2 << TB_BCAST_TYPE_SHIFT,
0050   TB_BCAST_Q = 3 << TB_BCAST_TYPE_SHIFT,
0051   TB_BCAST_SS = 4 << TB_BCAST_TYPE_SHIFT,
0052   TB_BCAST_SD = 5 << TB_BCAST_TYPE_SHIFT,
0053   TB_BCAST_SH = 6 << TB_BCAST_TYPE_SHIFT,
0054   TB_BCAST_MASK = 0x7 << TB_BCAST_TYPE_SHIFT,
0055
0056   // Unused bits 14-16
0057 };
0058 } // namespace llvm
0059 #endif // LLVM_SUPPORT_X86FOLDTABLESUTILS_H