tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

Architecture-mips64.cpp (2595B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
      2 * vim: set ts=8 sts=2 et sw=2 tw=80:
      3 * This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "jit/mips64/Architecture-mips64.h"
      8 
      9 #include "jit/RegisterSets.h"
     10 
     11 namespace js {
     12 namespace jit {
     13 
     14 const char* const Registers::RegNames[] = {
     15    "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3", "a4", "a5", "a6",
     16    "a7",   "t4", "t5", "t6", "t7", "s0", "s1", "s2", "s3", "s4", "s5",
     17    "s6",   "s7", "t8", "t9", "k0", "k1", "gp", "sp", "fp", "ra"};
     18 
     19 const uint32_t Allocatable = 22;
     20 
     21 const Registers::SetType Registers::ArgRegMask =
     22    Registers::SharedArgRegMask | (1 << a4) | (1 << a5) | (1 << a6) | (1 << a7);
     23 
     24 const Registers::SetType Registers::JSCallMask = (1 << Registers::v1);
     25 
     26 const Registers::SetType Registers::CallMask = (1 << Registers::v0);
     27 
     28 FloatRegisters::Encoding FloatRegisters::FromName(const char* name) {
     29  for (size_t i = 0; i < Total; i++) {
     30    if (strcmp(GetName(Encoding(i)), name) == 0) {
     31      return Encoding(i);
     32    }
     33  }
     34 
     35  return Invalid;
     36 }
     37 
     38 FloatRegister FloatRegister::singleOverlay() const {
     39  MOZ_ASSERT(!isInvalid());
     40  if (kind_ == Codes::Double) {
     41    return FloatRegister(reg_, Codes::Single);
     42  }
     43  return *this;
     44 }
     45 
     46 FloatRegister FloatRegister::doubleOverlay() const {
     47  MOZ_ASSERT(!isInvalid());
     48  if (kind_ != Codes::Double) {
     49    return FloatRegister(reg_, Codes::Double);
     50  }
     51  return *this;
     52 }
     53 
     54 FloatRegisterSet FloatRegister::ReduceSetForPush(const FloatRegisterSet& s) {
     55 #ifdef ENABLE_WASM_SIMD
     56 #  error "Needs more careful logic if SIMD is enabled"
     57 #endif
     58 
     59  LiveFloatRegisterSet mod;
     60  for (FloatRegisterIterator iter(s); iter.more(); ++iter) {
     61    if ((*iter).isSingle()) {
     62      // Even for single size registers save complete double register.
     63      mod.addUnchecked((*iter).doubleOverlay());
     64    } else {
     65      mod.addUnchecked(*iter);
     66    }
     67  }
     68  return mod.set();
     69 }
     70 
     71 uint32_t FloatRegister::GetPushSizeInBytes(const FloatRegisterSet& s) {
     72 #ifdef ENABLE_WASM_SIMD
     73 #  error "Needs more careful logic if SIMD is enabled"
     74 #endif
     75 
     76  FloatRegisterSet ss = s.reduceSetForPush();
     77  uint64_t bits = ss.bits();
     78  // We are only pushing double registers.
     79  MOZ_ASSERT((bits & 0xffffffff) == 0);
     80  uint32_t ret = mozilla::CountPopulation32(bits >> 32) * sizeof(double);
     81  return ret;
     82 }
     83 uint32_t FloatRegister::getRegisterDumpOffsetInBytes() {
     84  return id() * sizeof(double);
     85 }
     86 
     87 }  // namespace jit
     88 }  // namespace js