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[ia32] Support root relative access of external references

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Change-Id: I51dee467f5b843e96ffccbe6e99ba203e8c3bf10
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3111266
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76754}
This commit is contained in:
Ng Zhi An 2021-08-20 09:48:59 -07:00 committed by V8 LUCI CQ
parent 25d5e50812
commit 5bf82ba424
1 changed files with 5 additions and 1 deletions
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6
src/codegen/ia32/macro-assembler-ia32.cc
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@ -199,7 +199,11 @@ void TurboAssembler::PushArray(Register array, Register size, Register scratch,
Operand TurboAssembler::ExternalReferenceAsOperand(ExternalReference reference,
Register scratch) {
// TODO(jgruber): Add support for enable_root_relative_access.
if (root_array_available() && options().enable_root_relative_access) {
intptr_t delta =
RootRegisterOffsetForExternalReference(isolate(), reference);
return Operand(kRootRegister, delta);
}
if (root_array_available() && options().isolate_independent_code) {
if (IsAddressableThroughRootRegister(isolate(), reference)) {
// Some external references can be efficiently loaded as an offset from