1// Copyright 2011 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28#include <stdlib.h> 29 30#include "src/v8.h" 31 32#include "src/code-stubs.h" 33#include "src/factory.h" 34#include "src/macro-assembler.h" 35#include "src/objects.h" 36#include "test/cctest/cctest.h" 37 38#ifdef USE_SIMULATOR 39#include "src/simulator.h" 40#endif 41 42using namespace v8::internal; 43 44 45typedef uint32_t (*HASH_FUNCTION)(); 46 47#define __ masm-> 48 49 50void generate(MacroAssembler* masm, uint32_t key) { 51#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X87 52 __ push(ebx); 53 __ mov(eax, Immediate(key)); 54 __ GetNumberHash(eax, ebx); 55 __ pop(ebx); 56 __ Ret(); 57#elif V8_TARGET_ARCH_X64 58 __ pushq(kRootRegister); 59 __ InitializeRootRegister(); 60 __ pushq(rbx); 61 __ movp(rax, Immediate(key)); 62 __ GetNumberHash(rax, rbx); 63 __ popq(rbx); 64 __ popq(kRootRegister); 65 __ Ret(); 66#elif V8_TARGET_ARCH_ARM 67 __ push(kRootRegister); 68 __ InitializeRootRegister(); 69 __ mov(r0, Operand(key)); 70 __ GetNumberHash(r0, ip); 71 __ pop(kRootRegister); 72 __ mov(pc, Operand(lr)); 73#elif V8_TARGET_ARCH_ARM64 74 // The ARM64 assembler usually uses jssp (x28) as a stack pointer, but only 75 // csp is initialized by the calling (C++) code. 76 Register old_stack_pointer = __ StackPointer(); 77 __ SetStackPointer(csp); 78 __ Push(root, xzr); 79 __ InitializeRootRegister(); 80 __ Mov(x0, key); 81 __ GetNumberHash(x0, x10); 82 __ Pop(xzr, root); 83 __ Ret(); 84 __ SetStackPointer(old_stack_pointer); 85#elif V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64 86 __ push(kRootRegister); 87 __ InitializeRootRegister(); 88 __ li(v0, Operand(key)); 89 __ GetNumberHash(v0, t1); 90 __ pop(kRootRegister); 91 __ jr(ra); 92 __ nop(); 93#else 94#error Unsupported architecture. 95#endif 96} 97 98 99void check(uint32_t key) { 100 Isolate* isolate = CcTest::i_isolate(); 101 Factory* factory = isolate->factory(); 102 HandleScope scope(isolate); 103 104 v8::internal::byte buffer[2048]; 105 MacroAssembler masm(CcTest::i_isolate(), buffer, sizeof buffer); 106 107 generate(&masm, key); 108 109 CodeDesc desc; 110 masm.GetCode(&desc); 111 Handle<Object> undefined(isolate->heap()->undefined_value(), isolate); 112 Handle<Code> code = factory->NewCode(desc, 113 Code::ComputeFlags(Code::STUB), 114 undefined); 115 CHECK(code->IsCode()); 116 117 HASH_FUNCTION hash = FUNCTION_CAST<HASH_FUNCTION>(code->entry()); 118#ifdef USE_SIMULATOR 119 uint32_t codegen_hash = static_cast<uint32_t>( 120 reinterpret_cast<uintptr_t>(CALL_GENERATED_CODE(hash, 0, 0, 0, 0, 0))); 121#else 122 uint32_t codegen_hash = hash(); 123#endif 124 125 uint32_t runtime_hash = ComputeIntegerHash(key, isolate->heap()->HashSeed()); 126 CHECK(runtime_hash == codegen_hash); 127} 128 129 130static uint32_t PseudoRandom(uint32_t i, uint32_t j) { 131 return ~(~((i * 781) ^ (j * 329))); 132} 133 134 135TEST(NumberHash) { 136 v8::Isolate* isolate = CcTest::isolate(); 137 v8::HandleScope handle_scope(isolate); 138 v8::Context::Scope context_scope(v8::Context::New(isolate)); 139 140 // Some specific numbers 141 for (uint32_t key = 0; key < 42; key += 7) { 142 check(key); 143 } 144 145 // Some pseudo-random numbers 146 static const uint32_t kLimit = 1000; 147 for (uint32_t i = 0; i < 5; i++) { 148 for (uint32_t j = 0; j < 5; j++) { 149 check(PseudoRandom(i, j) % kLimit); 150 } 151 } 152} 153 154#undef __ 155