From 6d6a3e4551b2c807553cb2380dbbf2cb0154e400 Mon Sep 17 00:00:00 2001
From: Milad Farazmand <miladfar@ca.ibm.com>
Date: Tue, 14 Jan 2020 13:43:14 +0000
Subject: [PATCH] deps: V8: cherry-pick d89f4ef1cd62
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Original commit message:

    S390x: improve performance by skipping Debug Hook if not needed

    Change-Id: Ib4b2821f2941cdc131f9c75b89a3baced7554f8d
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1991802
    Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
    Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
    Cr-Commit-Position: refs/heads/master@{#65644}

Refs: https://github.com/v8/v8/commit/d89f4ef1cd629cb169f0d9efcaefd05ebf09fd3d

PR-URL: https://github.com/nodejs/node/pull/31354
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
---
 common.gypi                                      | 2 +-
 deps/v8/src/codegen/s390/macro-assembler-s390.cc | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/common.gypi b/common.gypi
index 67615166ccc128..ab28ca65e7676d 100644
--- a/common.gypi
+++ b/common.gypi
@@ -39,7 +39,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.27',
+    'v8_embedder_string': '-node.28',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/src/codegen/s390/macro-assembler-s390.cc b/deps/v8/src/codegen/s390/macro-assembler-s390.cc
index 4cab44d9e1b612..b3748332f48ece 100644
--- a/deps/v8/src/codegen/s390/macro-assembler-s390.cc
+++ b/deps/v8/src/codegen/s390/macro-assembler-s390.cc
@@ -1339,8 +1339,8 @@ void MacroAssembler::CheckDebugHook(Register fun, Register new_target,
   ExternalReference debug_hook_active =
       ExternalReference::debug_hook_on_function_call_address(isolate());
   Move(r6, debug_hook_active);
-  tm(MemOperand(r6), Operand::Zero());
-  bne(&skip_hook);
+  tm(MemOperand(r6), Operand(0xFF));
+  beq(&skip_hook);
 
   {
     // Load receiver to pass it later to DebugOnFunctionCall hook.