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/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) {
33 return Encoding(i);
34 }
35 }
36
37 return Invalid;
38 }
39
doubleOverlay() const40 FloatRegister FloatRegister::doubleOverlay() const {
41 MOZ_ASSERT(isNotOdd());
42 if (isSingle()) {
43 return FloatRegister(code_, Double);
44 }
45 return *this;
46 }
47
singleOverlay() const48 FloatRegister FloatRegister::singleOverlay() const {
49 MOZ_ASSERT(isNotOdd());
50 if (isDouble()) {
51 return FloatRegister(code_, Single);
52 }
53 return *this;
54 }
55
ReduceSetForPush(const FloatRegisterSet & s)56 FloatRegisterSet FloatRegister::ReduceSetForPush(const FloatRegisterSet& s) {
57 #ifdef ENABLE_WASM_SIMD
58 # error "Needs more careful logic if SIMD is enabled"
59 #endif
60
61 LiveFloatRegisterSet mod;
62 for (FloatRegisterIterator iter(s); iter.more(); ++iter) {
63 // Even for single size registers save complete double register.
64 mod.addUnchecked((*iter).doubleOverlay());
65 }
66 return mod.set();
67 }
68
GetPushSizeInBytes(const FloatRegisterSet & s)69 uint32_t FloatRegister::GetPushSizeInBytes(const FloatRegisterSet& s) {
70 #ifdef ENABLE_WASM_SIMD
71 # error "Needs more careful logic if SIMD is enabled"
72 #endif
73
74 FloatRegisterSet ss = s.reduceSetForPush();
75 uint64_t bits = ss.bits();
76 // We are only pushing double registers.
77 MOZ_ASSERT((bits & 0xFFFF) == 0);
78 uint32_t ret = mozilla::CountPopulation32(bits) * sizeof(double);
79
80 // Additional space needed by MacroAssembler::PushRegsInMask to ensure
81 // correct alignment of double values.
82 if (ret) {
83 ret += sizeof(double);
84 }
85
86 return ret;
87 }
getRegisterDumpOffsetInBytes()88 uint32_t FloatRegister::getRegisterDumpOffsetInBytes() {
89 MOZ_ASSERT(isNotOdd());
90 return id() * sizeof(float);
91 }
92
93 } // namespace jit
94 } // namespace js
95