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author | Michaël Zasso <targos@protonmail.com> | 2019-08-01 08:38:30 +0200 |
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committer | Michaël Zasso <targos@protonmail.com> | 2019-08-01 12:53:56 +0200 |
commit | 2dcc3665abf57c3607cebffdeeca062f5894885d (patch) | |
tree | 4f560748132edcfb4c22d6f967a7e80d23d7ea2c /deps/v8/src/deoptimizer/ppc | |
parent | 1ee47d550c6de132f06110aa13eceb7551d643b3 (diff) | |
download | android-node-v8-2dcc3665abf57c3607cebffdeeca062f5894885d.tar.gz android-node-v8-2dcc3665abf57c3607cebffdeeca062f5894885d.tar.bz2 android-node-v8-2dcc3665abf57c3607cebffdeeca062f5894885d.zip |
deps: update V8 to 7.6.303.28
PR-URL: https://github.com/nodejs/node/pull/28016
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Diffstat (limited to 'deps/v8/src/deoptimizer/ppc')
-rw-r--r-- | deps/v8/src/deoptimizer/ppc/deoptimizer-ppc.cc | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/deps/v8/src/deoptimizer/ppc/deoptimizer-ppc.cc b/deps/v8/src/deoptimizer/ppc/deoptimizer-ppc.cc new file mode 100644 index 0000000000..268660c2ef --- /dev/null +++ b/deps/v8/src/deoptimizer/ppc/deoptimizer-ppc.cc @@ -0,0 +1,246 @@ +// Copyright 2014 the V8 project authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "src/codegen/assembler-inl.h" +#include "src/codegen/macro-assembler.h" +#include "src/codegen/register-configuration.h" +#include "src/codegen/safepoint-table.h" +#include "src/deoptimizer/deoptimizer.h" + +namespace v8 { +namespace internal { + +#define __ masm-> + +// This code tries to be close to ia32 code so that any changes can be +// easily ported. +void Deoptimizer::GenerateDeoptimizationEntries(MacroAssembler* masm, + Isolate* isolate, + DeoptimizeKind deopt_kind) { + NoRootArrayScope no_root_array(masm); + + // Unlike on ARM we don't save all the registers, just the useful ones. + // For the rest, there are gaps on the stack, so the offsets remain the same. + const int kNumberOfRegisters = Register::kNumRegisters; + + RegList restored_regs = kJSCallerSaved | kCalleeSaved; + RegList saved_regs = restored_regs | sp.bit(); + + const int kDoubleRegsSize = kDoubleSize * DoubleRegister::kNumRegisters; + const int kFloatRegsSize = kFloatSize * FloatRegister::kNumRegisters; + + // Save all double registers before messing with them. + __ subi(sp, sp, Operand(kDoubleRegsSize)); + const RegisterConfiguration* config = RegisterConfiguration::Default(); + for (int i = 0; i < config->num_allocatable_double_registers(); ++i) { + int code = config->GetAllocatableDoubleCode(i); + const DoubleRegister dreg = DoubleRegister::from_code(code); + int offset = code * kDoubleSize; + __ stfd(dreg, MemOperand(sp, offset)); + } + // Save all float registers before messing with them. + __ subi(sp, sp, Operand(kFloatRegsSize)); + for (int i = 0; i < config->num_allocatable_float_registers(); ++i) { + int code = config->GetAllocatableFloatCode(i); + const FloatRegister freg = FloatRegister::from_code(code); + int offset = code * kFloatSize; + __ stfs(freg, MemOperand(sp, offset)); + } + + // Push saved_regs (needed to populate FrameDescription::registers_). + // Leave gaps for other registers. + __ subi(sp, sp, Operand(kNumberOfRegisters * kPointerSize)); + for (int16_t i = kNumberOfRegisters - 1; i >= 0; i--) { + if ((saved_regs & (1 << i)) != 0) { + __ StoreP(ToRegister(i), MemOperand(sp, kPointerSize * i)); + } + } + + __ mov(ip, Operand(ExternalReference::Create( + IsolateAddressId::kCEntryFPAddress, isolate))); + __ StoreP(fp, MemOperand(ip)); + + const int kSavedRegistersAreaSize = + (kNumberOfRegisters * kPointerSize) + kDoubleRegsSize + kFloatRegsSize; + + // Get the bailout id is passed as r29 by the caller. + __ mr(r5, r29); + + // Get the address of the location in the code object (r6) (return + // address for lazy deoptimization) and compute the fp-to-sp delta in + // register r7. + __ mflr(r6); + __ addi(r7, sp, Operand(kSavedRegistersAreaSize)); + __ sub(r7, fp, r7); + + // Allocate a new deoptimizer object. + // Pass six arguments in r3 to r8. + __ PrepareCallCFunction(6, r8); + __ li(r3, Operand::Zero()); + Label context_check; + __ LoadP(r4, MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset)); + __ JumpIfSmi(r4, &context_check); + __ LoadP(r3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); + __ bind(&context_check); + __ li(r4, Operand(static_cast<int>(deopt_kind))); + // r5: bailout id already loaded. + // r6: code address or 0 already loaded. + // r7: Fp-to-sp delta. + __ mov(r8, Operand(ExternalReference::isolate_address(isolate))); + // Call Deoptimizer::New(). + { + AllowExternalCallThatCantCauseGC scope(masm); + __ CallCFunction(ExternalReference::new_deoptimizer_function(), 6); + } + + // Preserve "deoptimizer" object in register r3 and get the input + // frame descriptor pointer to r4 (deoptimizer->input_); + __ LoadP(r4, MemOperand(r3, Deoptimizer::input_offset())); + + // Copy core registers into FrameDescription::registers_[kNumRegisters]. + DCHECK_EQ(Register::kNumRegisters, kNumberOfRegisters); + for (int i = 0; i < kNumberOfRegisters; i++) { + int offset = (i * kPointerSize) + FrameDescription::registers_offset(); + __ LoadP(r5, MemOperand(sp, i * kPointerSize)); + __ StoreP(r5, MemOperand(r4, offset)); + } + + int double_regs_offset = FrameDescription::double_registers_offset(); + // Copy double registers to + // double_registers_[DoubleRegister::kNumRegisters] + for (int i = 0; i < config->num_allocatable_double_registers(); ++i) { + int code = config->GetAllocatableDoubleCode(i); + int dst_offset = code * kDoubleSize + double_regs_offset; + int src_offset = + code * kDoubleSize + kNumberOfRegisters * kPointerSize + kFloatRegsSize; + __ lfd(d0, MemOperand(sp, src_offset)); + __ stfd(d0, MemOperand(r4, dst_offset)); + } + int float_regs_offset = FrameDescription::float_registers_offset(); + // Copy float registers to + // float_registers_[FloatRegister::kNumRegisters] + for (int i = 0; i < config->num_allocatable_float_registers(); ++i) { + int code = config->GetAllocatableFloatCode(i); + int dst_offset = code * kFloatSize + float_regs_offset; + int src_offset = code * kFloatSize + kNumberOfRegisters * kPointerSize; + __ lfs(d0, MemOperand(sp, src_offset)); + __ stfs(d0, MemOperand(r4, dst_offset)); + } + + // Remove the saved registers from the stack. + __ addi(sp, sp, Operand(kSavedRegistersAreaSize)); + + // Compute a pointer to the unwinding limit in register r5; that is + // the first stack slot not part of the input frame. + __ LoadP(r5, MemOperand(r4, FrameDescription::frame_size_offset())); + __ add(r5, r5, sp); + + // Unwind the stack down to - but not including - the unwinding + // limit and copy the contents of the activation frame to the input + // frame description. + __ addi(r6, r4, Operand(FrameDescription::frame_content_offset())); + Label pop_loop; + Label pop_loop_header; + __ b(&pop_loop_header); + __ bind(&pop_loop); + __ pop(r7); + __ StoreP(r7, MemOperand(r6, 0)); + __ addi(r6, r6, Operand(kPointerSize)); + __ bind(&pop_loop_header); + __ cmp(r5, sp); + __ bne(&pop_loop); + + // Compute the output frame in the deoptimizer. + __ push(r3); // Preserve deoptimizer object across call. + // r3: deoptimizer object; r4: scratch. + __ PrepareCallCFunction(1, r4); + // Call Deoptimizer::ComputeOutputFrames(). + { + AllowExternalCallThatCantCauseGC scope(masm); + __ CallCFunction(ExternalReference::compute_output_frames_function(), 1); + } + __ pop(r3); // Restore deoptimizer object (class Deoptimizer). + + __ LoadP(sp, MemOperand(r3, Deoptimizer::caller_frame_top_offset())); + + // Replace the current (input) frame with the output frames. + Label outer_push_loop, inner_push_loop, outer_loop_header, inner_loop_header; + // Outer loop state: r7 = current "FrameDescription** output_", + // r4 = one past the last FrameDescription**. + __ lwz(r4, MemOperand(r3, Deoptimizer::output_count_offset())); + __ LoadP(r7, MemOperand(r3, Deoptimizer::output_offset())); // r7 is output_. + __ ShiftLeftImm(r4, r4, Operand(kPointerSizeLog2)); + __ add(r4, r7, r4); + __ b(&outer_loop_header); + + __ bind(&outer_push_loop); + // Inner loop state: r5 = current FrameDescription*, r6 = loop index. + __ LoadP(r5, MemOperand(r7, 0)); // output_[ix] + __ LoadP(r6, MemOperand(r5, FrameDescription::frame_size_offset())); + __ b(&inner_loop_header); + + __ bind(&inner_push_loop); + __ addi(r6, r6, Operand(-sizeof(intptr_t))); + __ add(r9, r5, r6); + __ LoadP(r9, MemOperand(r9, FrameDescription::frame_content_offset())); + __ push(r9); + + __ bind(&inner_loop_header); + __ cmpi(r6, Operand::Zero()); + __ bne(&inner_push_loop); // test for gt? + + __ addi(r7, r7, Operand(kPointerSize)); + __ bind(&outer_loop_header); + __ cmp(r7, r4); + __ blt(&outer_push_loop); + + __ LoadP(r4, MemOperand(r3, Deoptimizer::input_offset())); + for (int i = 0; i < config->num_allocatable_double_registers(); ++i) { + int code = config->GetAllocatableDoubleCode(i); + const DoubleRegister dreg = DoubleRegister::from_code(code); + int src_offset = code * kDoubleSize + double_regs_offset; + __ lfd(dreg, MemOperand(r4, src_offset)); + } + + // Push pc, and continuation from the last output frame. + __ LoadP(r9, MemOperand(r5, FrameDescription::pc_offset())); + __ push(r9); + __ LoadP(r9, MemOperand(r5, FrameDescription::continuation_offset())); + __ push(r9); + + // Restore the registers from the last output frame. + DCHECK(!(ip.bit() & restored_regs)); + __ mr(ip, r5); + for (int i = kNumberOfRegisters - 1; i >= 0; i--) { + int offset = (i * kPointerSize) + FrameDescription::registers_offset(); + if ((restored_regs & (1 << i)) != 0) { + __ LoadP(ToRegister(i), MemOperand(ip, offset)); + } + } + + __ pop(ip); // get continuation, leave pc on stack + __ pop(r0); + __ mtlr(r0); + __ Jump(ip); + __ stop("Unreachable."); +} + +bool Deoptimizer::PadTopOfStackRegister() { return false; } + +void FrameDescription::SetCallerPc(unsigned offset, intptr_t value) { + SetFrameSlot(offset, value); +} + +void FrameDescription::SetCallerFp(unsigned offset, intptr_t value) { + SetFrameSlot(offset, value); +} + +void FrameDescription::SetCallerConstantPool(unsigned offset, intptr_t value) { + DCHECK(FLAG_enable_embedded_constant_pool); + SetFrameSlot(offset, value); +} + +#undef __ +} // namespace internal +} // namespace v8 |