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PPC: Add new relocation type WASM_MEMORY_SIZE_REFERENCE, use relocatable pointers to update wasm memory size references in generated code.

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Port 117a56b7c2

Original commit message:

     - Add new RelocInfo mode WASM_MEMORY_SIZE_REFERENCE in the assembler and add relocation information to immediates in compare instructions.
     - Use relocatable constants for MemSize/BoundsCheck in the wasm compiler

R=gdeepti@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/1948263003
Cr-Commit-Position: refs/heads/master@{#36054}
This commit is contained in:
bjaideep 2016-05-05 12:09:56 -07:00 committed by Commit bot
parent e11eb9a7d7
commit a870cf3abd
3 changed files with 44 additions and 23 deletions
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12
src/compiler/ppc/code-generator-ppc.cc
View File

@ -1924,21 +1924,23 @@ void CodeGenerator::AssembleMove(InstructionOperand* source,
destination->IsRegister() ? g.ToRegister(destination) : kScratchReg;
switch (src.type()) {
case Constant::kInt32:
#if !V8_TARGET_ARCH_PPC64
if (src.rmode() == RelocInfo::WASM_MEMORY_REFERENCE) {
#if V8_TARGET_ARCH_PPC64
if (src.rmode() == RelocInfo::WASM_MEMORY_SIZE_REFERENCE) {
#else
if (src.rmode() == RelocInfo::WASM_MEMORY_REFERENCE ||
src.rmode() == RelocInfo::WASM_MEMORY_SIZE_REFERENCE) {
#endif
__ mov(dst, Operand(src.ToInt32(), src.rmode()));
} else {
#endif
__ mov(dst, Operand(src.ToInt32()));
#if !V8_TARGET_ARCH_PPC64
}
#endif
break;
case Constant::kInt64:
#if V8_TARGET_ARCH_PPC64
if (src.rmode() == RelocInfo::WASM_MEMORY_REFERENCE) {
__ mov(dst, Operand(src.ToInt64(), src.rmode()));
} else {
DCHECK(src.rmode() != RelocInfo::WASM_MEMORY_SIZE_REFERENCE);
#endif
__ mov(dst, Operand(src.ToInt64()));
#if V8_TARGET_ARCH_PPC64

18
src/ppc/assembler-ppc-inl.h
View File

@ -89,11 +89,6 @@ Address RelocInfo::target_address() {
return Assembler::target_address_at(pc_, host_);
}
Address RelocInfo::wasm_memory_reference() {
DCHECK(IsWasmMemoryReference(rmode_));
return Assembler::target_address_at(pc_, host_);
}
Address RelocInfo::target_address_address() {
DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) ||
rmode_ == EMBEDDED_OBJECT || rmode_ == EXTERNAL_REFERENCE);
@ -183,19 +178,6 @@ Address Assembler::return_address_from_call_start(Address pc) {
return pc + (len + 2) * kInstrSize;
}
void RelocInfo::update_wasm_memory_reference(
Address old_base, Address new_base, size_t old_size, size_t new_size,
ICacheFlushMode icache_flush_mode) {
DCHECK(IsWasmMemoryReference(rmode_));
DCHECK(old_base <= wasm_memory_reference() &&
wasm_memory_reference() < old_base + old_size);
Address updated_reference = new_base + (wasm_memory_reference() - old_base);
DCHECK(new_base <= updated_reference &&
updated_reference < new_base + new_size);
Assembler::set_target_address_at(isolate_, pc_, host_, updated_reference,
icache_flush_mode);
}
Object* RelocInfo::target_object() {
DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
return reinterpret_cast<Object*>(Assembler::target_address_at(pc_, host_));

37
src/ppc/assembler-ppc.cc
View File

@ -155,6 +155,43 @@ bool RelocInfo::IsInConstantPool() {
return false;
}
Address RelocInfo::wasm_memory_reference() {
DCHECK(IsWasmMemoryReference(rmode_));
return Assembler::target_address_at(pc_, host_);
}
uint32_t RelocInfo::wasm_memory_size_reference() {
DCHECK(IsWasmMemorySizeReference(rmode_));
return static_cast<uint32_t>(
reinterpret_cast<intptr_t>(Assembler::target_address_at(pc_, host_)));
}
void RelocInfo::update_wasm_memory_reference(
Address old_base, Address new_base, uint32_t old_size, uint32_t new_size,
ICacheFlushMode icache_flush_mode) {
DCHECK(IsWasmMemoryReference(rmode_) || IsWasmMemorySizeReference(rmode_));
if (IsWasmMemoryReference(rmode_)) {
Address updated_memory_reference;
DCHECK(old_base <= wasm_memory_reference() &&
wasm_memory_reference() < old_base + old_size);
updated_memory_reference = new_base + (wasm_memory_reference() - old_base);
DCHECK(new_base <= updated_memory_reference &&
updated_memory_reference < new_base + new_size);
Assembler::set_target_address_at(
isolate_, pc_, host_, updated_memory_reference, icache_flush_mode);
} else if (IsWasmMemorySizeReference(rmode_)) {
uint32_t updated_size_reference;
DCHECK(wasm_memory_size_reference() <= old_size);
updated_size_reference =
new_size + (wasm_memory_size_reference() - old_size);
DCHECK(updated_size_reference <= new_size);
Assembler::set_target_address_at(
isolate_, pc_, host_, reinterpret_cast<Address>(updated_size_reference),
icache_flush_mode);
} else {
UNREACHABLE();
}
}
// -----------------------------------------------------------------------------
// Implementation of Operand and MemOperand