testWasmMasm.cpp (2018B)
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 */ 4 /* This Source Code Form is subject to the terms of the Mozilla Public 5 * License, v. 2.0. If a copy of the MPL was not distributed with this 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 7 8 #include "jit/MacroAssembler.h" 9 10 #include "jsapi-tests/tests.h" 11 #include "jsapi-tests/testsJit.h" 12 13 #include "jit/MacroAssembler-inl.h" 14 15 using namespace js; 16 using namespace js::jit; 17 18 #if defined(JS_CODEGEN_X86) || defined(JS_CODEGEN_X64) || \ 19 defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) 20 21 static bool GenerateAndRunSub32FromMem(JSContext* cx, int32_t init, int delta) { 22 js::LifoAlloc lifo(4096, js::MallocArena); 23 TempAllocator alloc(&lifo); 24 JitContext jc(cx); 25 StackMacroAssembler masm(cx, alloc); 26 AutoCreatedBy acb(masm, __func__); 27 28 volatile int32_t memory = init; 29 const Register Reg = CallTempReg0; 30 31 PrepareJit(masm); 32 33 Label itWentNegative, fail, end; 34 masm.mov(ImmPtr((void*)&memory, ImmPtr::NoCheckToken()), Reg); 35 CodeOffset patchAt = masm.sub32FromMemAndBranchIfNegativeWithPatch( 36 Address(Reg, 0), &itWentNegative); 37 if (init >= delta) { 38 // The initial value is >= the delta. So we don't expect the value to go 39 // negative. 40 masm.jump(&end); 41 masm.bind(&itWentNegative); 42 masm.printf("Failed\n"); 43 masm.breakpoint(); 44 } else { 45 // The initial value is < the delta. We *do* expect the value to go 46 // negative. 47 masm.printf("Failed\n"); 48 masm.breakpoint(); 49 masm.bind(&itWentNegative); 50 } 51 masm.bind(&end); 52 53 masm.patchSub32FromMemAndBranchIfNegative(patchAt, Imm32(delta)); 54 if (!ExecuteJit(cx, masm)) { 55 return false; 56 } 57 58 MOZ_ASSERT(init - delta == memory); 59 return true; 60 } 61 62 BEGIN_TEST(testWasmSub32FromMem) { 63 return GenerateAndRunSub32FromMem(cx, 1, 123) && 64 GenerateAndRunSub32FromMem(cx, 120, 3) && 65 GenerateAndRunSub32FromMem(cx, 2, 2); 66 } 67 END_TEST(testWasmSub32FromMem) 68 69 #endif