lib/Target/Mips/MCTargetDesc/MipsABIFlagsSection.cpp

   1 //===- MipsABIFlagsSection.cpp - Mips ELF ABI Flags Section ---------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "MCTargetDesc/MipsABIFlagsSection.h"
  10 #include "llvm/ADT/StringRef.h"
  11 #include "llvm/MC/MCStreamer.h"
  12 #include "llvm/Support/ErrorHandling.h"
  13 #include "llvm/Support/MipsABIFlags.h"
  14
  15 using namespace llvm;
  16
  17 uint8_t MipsABIFlagsSection::getFpABIValue() {
  18   switch (FpABI) {
  19   case FpABIKind::ANY:
  20     return Mips::Val_GNU_MIPS_ABI_FP_ANY;
  21   case FpABIKind::SOFT:
  22     return Mips::Val_GNU_MIPS_ABI_FP_SOFT;
  23   case FpABIKind::XX:
  24     return Mips::Val_GNU_MIPS_ABI_FP_XX;
  25   case FpABIKind::S32:
  26     return Mips::Val_GNU_MIPS_ABI_FP_DOUBLE;
  27   case FpABIKind::S64:
  28     if (Is32BitABI)
  29       return OddSPReg ? Mips::Val_GNU_MIPS_ABI_FP_64
  30                       : Mips::Val_GNU_MIPS_ABI_FP_64A;
  31     return Mips::Val_GNU_MIPS_ABI_FP_DOUBLE;
  32   }
  33
  34   llvm_unreachable("unexpected fp abi value");
  35 }
  36
  37 StringRef MipsABIFlagsSection::getFpABIString(FpABIKind Value) {
  38   switch (Value) {
  39   case FpABIKind::XX:
  40     return "xx";
  41   case FpABIKind::S32:
  42     return "32";
  43   case FpABIKind::S64:
  44     return "64";
  45   default:
  46     llvm_unreachable("unsupported fp abi value");
  47   }
  48 }
  49
  50 uint8_t MipsABIFlagsSection::getCPR1SizeValue() {
  51   if (FpABI == FpABIKind::XX)
  52     return (uint8_t)Mips::AFL_REG_32;
  53   return (uint8_t)CPR1Size;
  54 }
  55
  56 namespace llvm {
  57
  58 MCStreamer &operator<<(MCStreamer &OS, MipsABIFlagsSection &ABIFlagsSection) {
  59   // Write out a Elf_Internal_ABIFlags_v0 struct
  60   OS.EmitIntValue(ABIFlagsSection.getVersionValue(), 2);      // version
  61   OS.EmitIntValue(ABIFlagsSection.getISALevelValue(), 1);     // isa_level
  62   OS.EmitIntValue(ABIFlagsSection.getISARevisionValue(), 1);  // isa_rev
  63   OS.EmitIntValue(ABIFlagsSection.getGPRSizeValue(), 1);      // gpr_size
  64   OS.EmitIntValue(ABIFlagsSection.getCPR1SizeValue(), 1);     // cpr1_size
  65   OS.EmitIntValue(ABIFlagsSection.getCPR2SizeValue(), 1);     // cpr2_size
  66   OS.EmitIntValue(ABIFlagsSection.getFpABIValue(), 1);        // fp_abi
  67   OS.EmitIntValue(ABIFlagsSection.getISAExtensionValue(), 4); // isa_ext
  68   OS.EmitIntValue(ABIFlagsSection.getASESetValue(), 4);       // ases
  69   OS.EmitIntValue(ABIFlagsSection.getFlags1Value(), 4);       // flags1
  70   OS.EmitIntValue(ABIFlagsSection.getFlags2Value(), 4);       // flags2
  71   return OS;
  72 }
  73
  74 } // end namespace llvm