diff options
Diffstat (limited to 'deps/v8/src/mips64/codegen-mips64.cc')
| -rw-r--r-- | deps/v8/src/mips64/codegen-mips64.cc | 133 |
1 files changed, 15 insertions, 118 deletions
diff --git a/deps/v8/src/mips64/codegen-mips64.cc b/deps/v8/src/mips64/codegen-mips64.cc index 814c46a326..970e0efe56 100644 --- a/deps/v8/src/mips64/codegen-mips64.cc +++ b/deps/v8/src/mips64/codegen-mips64.cc @@ -2,8 +2,6 @@ // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. -#include "src/mips64/codegen-mips64.h" - #if V8_TARGET_ARCH_MIPS64 #include <memory> @@ -15,27 +13,26 @@ namespace v8 { namespace internal { - #define __ masm. - #if defined(V8_HOST_ARCH_MIPS) + MemCopyUint8Function CreateMemCopyUint8Function(Isolate* isolate, MemCopyUint8Function stub) { #if defined(USE_SIMULATOR) return stub; #else - size_t actual_size; + size_t allocated = 0; byte* buffer = - static_cast<byte*>(base::OS::Allocate(3 * KB, &actual_size, true)); + AllocateSystemPage(isolate->heap()->GetRandomMmapAddr(), &allocated); if (buffer == nullptr) return stub; - // This code assumes that cache lines are 32 bytes and if the cache line is - // larger it will not work correctly. - MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size), + MacroAssembler masm(isolate, buffer, static_cast<int>(allocated), CodeObjectRequired::kNo); + // This code assumes that cache lines are 32 bytes and if the cache line is + // larger it will not work correctly. { Label lastb, unaligned, aligned, chkw, loop16w, chk1w, wordCopy_loop, skip_pref, lastbloop, @@ -548,8 +545,9 @@ MemCopyUint8Function CreateMemCopyUint8Function(Isolate* isolate, masm.GetCode(isolte, &desc); DCHECK(!RelocInfo::RequiresRelocation(isolate, desc)); - Assembler::FlushICache(isolate, buffer, actual_size); - base::OS::ProtectCode(buffer, actual_size); + Assembler::FlushICache(isolate, buffer, allocated); + CHECK(base::OS::SetPermissions(buffer, allocated, + base::OS::MemoryPermission::kReadExecute)); return FUNCTION_CAST<MemCopyUint8Function>(buffer); #endif } @@ -559,12 +557,12 @@ UnaryMathFunctionWithIsolate CreateSqrtFunction(Isolate* isolate) { #if defined(USE_SIMULATOR) return nullptr; #else - size_t actual_size; + size_t allocated = 0; byte* buffer = - static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true)); + AllocateSystemPage(isolate->heap()->GetRandomMmapAddr(), &allocated); if (buffer == nullptr) return nullptr; - MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size), + MacroAssembler masm(isolate, buffer, static_cast<int>(allocated), CodeObjectRequired::kNo); __ MovFromFloatParameter(f12); @@ -576,116 +574,15 @@ UnaryMathFunctionWithIsolate CreateSqrtFunction(Isolate* isolate) { masm.GetCode(isolate, &desc); DCHECK(!RelocInfo::RequiresRelocation(isolate, desc)); - Assembler::FlushICache(isolate, buffer, actual_size); - base::OS::ProtectCode(buffer, actual_size); + Assembler::FlushICache(isolate, buffer, allocated); + CHECK(base::OS::SetPermissions(buffer, allocated, + base::OS::MemoryPermission::kReadExecute)); return FUNCTION_CAST<UnaryMathFunctionWithIsolate>(buffer); #endif } #undef __ -// ------------------------------------------------------------------------- -// Code generators - -#define __ ACCESS_MASM(masm) - -void StringCharLoadGenerator::Generate(MacroAssembler* masm, - Register string, - Register index, - Register result, - Label* call_runtime) { - Label indirect_string_loaded; - __ bind(&indirect_string_loaded); - - // Fetch the instance type of the receiver into result register. - __ Ld(result, FieldMemOperand(string, HeapObject::kMapOffset)); - __ Lbu(result, FieldMemOperand(result, Map::kInstanceTypeOffset)); - - // We need special handling for indirect strings. - Label check_sequential; - __ And(at, result, Operand(kIsIndirectStringMask)); - __ Branch(&check_sequential, eq, at, Operand(zero_reg)); - - // Dispatch on the indirect string shape: slice or cons. - Label cons_string, thin_string; - __ And(at, result, Operand(kStringRepresentationMask)); - __ Branch(&cons_string, eq, at, Operand(kConsStringTag)); - __ Branch(&thin_string, eq, at, Operand(kThinStringTag)); - - // Handle slices. - __ Ld(result, FieldMemOperand(string, SlicedString::kOffsetOffset)); - __ Ld(string, FieldMemOperand(string, SlicedString::kParentOffset)); - __ dsra32(at, result, 0); - __ Daddu(index, index, at); - __ jmp(&indirect_string_loaded); - - // Handle thin strings. - __ bind(&thin_string); - __ Ld(string, FieldMemOperand(string, ThinString::kActualOffset)); - __ jmp(&indirect_string_loaded); - - // Handle cons strings. - // Check whether the right hand side is the empty string (i.e. if - // this is really a flat string in a cons string). If that is not - // the case we would rather go to the runtime system now to flatten - // the string. - __ bind(&cons_string); - __ Ld(result, FieldMemOperand(string, ConsString::kSecondOffset)); - __ LoadRoot(at, Heap::kempty_stringRootIndex); - __ Branch(call_runtime, ne, result, Operand(at)); - // Get the first of the two strings and load its instance type. - __ Ld(string, FieldMemOperand(string, ConsString::kFirstOffset)); - __ jmp(&indirect_string_loaded); - - // Distinguish sequential and external strings. Only these two string - // representations can reach here (slices and flat cons strings have been - // reduced to the underlying sequential or external string). - Label external_string, check_encoding; - __ bind(&check_sequential); - STATIC_ASSERT(kSeqStringTag == 0); - __ And(at, result, Operand(kStringRepresentationMask)); - __ Branch(&external_string, ne, at, Operand(zero_reg)); - - // Prepare sequential strings - STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); - __ Daddu(string, - string, - SeqTwoByteString::kHeaderSize - kHeapObjectTag); - __ jmp(&check_encoding); - - // Handle external strings. - __ bind(&external_string); - if (FLAG_debug_code) { - // Assert that we do not have a cons or slice (indirect strings) here. - // Sequential strings have already been ruled out. - __ And(at, result, Operand(kIsIndirectStringMask)); - __ Assert(eq, kExternalStringExpectedButNotFound, - at, Operand(zero_reg)); - } - // Rule out short external strings. - STATIC_ASSERT(kShortExternalStringTag != 0); - __ And(at, result, Operand(kShortExternalStringMask)); - __ Branch(call_runtime, ne, at, Operand(zero_reg)); - __ Ld(string, FieldMemOperand(string, ExternalString::kResourceDataOffset)); - - Label one_byte, done; - __ bind(&check_encoding); - STATIC_ASSERT(kTwoByteStringTag == 0); - __ And(at, result, Operand(kStringEncodingMask)); - __ Branch(&one_byte, ne, at, Operand(zero_reg)); - // Two-byte string. - __ Dlsa(at, string, index, 1); - __ Lhu(result, MemOperand(at)); - __ jmp(&done); - __ bind(&one_byte); - // One_byte string. - __ Daddu(at, string, index); - __ Lbu(result, MemOperand(at)); - __ bind(&done); -} - -#undef __ - } // namespace internal } // namespace v8 |