1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 * vim: set ts=8 sts=4 et sw=4 tw=99:
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/mips32/Architecture-mips32.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", "t0", "t1", "t2",
16 "t3", "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 = 14;
20
21 const Registers::SetType Registers::ArgRegMask = Registers::SharedArgRegMask;
22
23 const Registers::SetType Registers::JSCallMask =
24 (1 << Registers::a2) | (1 << Registers::a3);
25
26 const Registers::SetType Registers::CallMask =
27 (1 << Registers::v0) |
28 (1 << Registers::v1); // used for double-size returns
29
FromName(const char * name)30 FloatRegisters::Encoding FloatRegisters::FromName(const char* name) {
31 for (size_t i = 0; i < RegisterIdLimit; i++) {
32 if (strcmp(GetName(i), name) == 0) return Encoding(i);
33 }
34
35 return Invalid;
36 }
37
doubleOverlay() const38 FloatRegister FloatRegister::doubleOverlay() const {
39 MOZ_ASSERT(isNotOdd());
40 if (isSingle()) return FloatRegister(code_, Double);
41 return *this;
42 }
43
singleOverlay() const44 FloatRegister FloatRegister::singleOverlay() const {
45 MOZ_ASSERT(isNotOdd());
46 if (isDouble()) return FloatRegister(code_, Single);
47 return *this;
48 }
49
ReduceSetForPush(const FloatRegisterSet & s)50 FloatRegisterSet FloatRegister::ReduceSetForPush(const FloatRegisterSet& s) {
51 LiveFloatRegisterSet mod;
52 for (FloatRegisterIterator iter(s); iter.more(); ++iter) {
53 // Even for single size registers save complete double register.
54 mod.addUnchecked((*iter).doubleOverlay());
55 }
56 return mod.set();
57 }
58
GetPushSizeInBytes(const FloatRegisterSet & s)59 uint32_t FloatRegister::GetPushSizeInBytes(const FloatRegisterSet& s) {
60 FloatRegisterSet ss = s.reduceSetForPush();
61 uint64_t bits = ss.bits();
62 // We are only pushing double registers.
63 MOZ_ASSERT((bits & 0xFFFF) == 0);
64 uint32_t ret = mozilla::CountPopulation32(bits) * sizeof(double);
65
66 // Additional space needed by MacroAssembler::PushRegsInMask to ensure
67 // correct alignment of double values.
68 if (ret) ret += sizeof(double);
69
70 return ret;
71 }
getRegisterDumpOffsetInBytes()72 uint32_t FloatRegister::getRegisterDumpOffsetInBytes() {
73 MOZ_ASSERT(isNotOdd());
74 return id() * sizeof(float);
75 }
76
77 } // namespace jit
78 } // namespace js
79