1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "src/execution/frame-constants.h" 6 7 #if V8_TARGET_ARCH_ARM64 8 9 #include "src/execution/arm64/frame-constants-arm64.h" 10 11 #include "src/codegen/arm64/assembler-arm64-inl.h" 12 #include "src/codegen/assembler.h" 13 #include "src/execution/frames.h" 14 15 namespace v8 { 16 namespace internal { 17 fp_register()18Register JavaScriptFrame::fp_register() { return v8::internal::fp; } context_register()19Register JavaScriptFrame::context_register() { return cp; } constant_pool_pointer_register()20Register JavaScriptFrame::constant_pool_pointer_register() { UNREACHABLE(); } 21 RegisterStackSlotCount(int register_count)22int UnoptimizedFrameConstants::RegisterStackSlotCount(int register_count) { 23 STATIC_ASSERT(InterpreterFrameConstants::kFixedFrameSize % 16 == 8); 24 // Interpreter frame header size is not 16-bytes aligned, so we'll need at 25 // least one register slot to make the frame a multiple of 16 bytes. The code 26 // below is equivalent to "RoundUp(register_count - 1, 2) + 1". 27 return RoundDown(register_count, 2) + 1; 28 } 29 PaddingSlotCount(int register_count)30int BuiltinContinuationFrameConstants::PaddingSlotCount(int register_count) { 31 // Round the total slot count up to a multiple of two, to make the frame a 32 // multiple of 16 bytes. 33 int slot_count = kFixedSlotCount + register_count; 34 int rounded_slot_count = RoundUp(slot_count, 2); 35 return rounded_slot_count - slot_count; 36 } 37 38 } // namespace internal 39 } // namespace v8 40 41 #endif // V8_TARGET_ARCH_ARM64 42