Changeset 290907 in webkit for trunk/Source/JavaScriptCore/assembler/CPU.h

Timestamp:

Mar 7, 2022, 1:55:08 PM (3 years ago)

Author:

Angelos Oikonomopoulos

Message:

AssemblyHelpersSpoolers: use load/store pair on ARMv7
​https://bugs.webkit.org/show_bug.cgi?id=235112

Reviewed by Žan Doberšek.

Save ~1% code size for baseline JIT on JS2 by emitting load/store pair
instructions on 32-bit ARM.

• assembler/ARMv7Assembler.h:

(JSC::ARMv6Assembler::vldmia):
(JSC::ARMv7Assembler::vstmia):

• assembler/CPU.h:

(JSC::isARM):

• assembler/MacroAssemblerARMv7.h:

(JSC::MacroAssemblerARMv7::loadPair64):
(JSC::MacroAssemblerARMv7::storePair64):

• jit/AssemblyHelpers.cpp:

(JSC::AssemblyHelpers::copyLLIntBaselineCalleeSavesFromFrameOrRegisterToEntryFrameCalleeSavesBuffer):

• jit/AssemblyHelpersSpoolers.h:

(JSC::AssemblyHelpers::LoadRegSpooler::executePair):
(JSC::AssemblyHelpers::StoreRegSpooler::executePair):
(JSC::AssemblyHelpers::CopySpooler::CopySpooler):
(JSC::AssemblyHelpers::CopySpooler::loadPair):
(JSC::AssemblyHelpers::CopySpooler::storePair):

File:

• trunk/Source/JavaScriptCore/assembler/CPU.h (modified) (1 diff)

trunk/Source/JavaScriptCore/assembler/CPU.h

@@ -37 +37 @@
 {
 #if HAVE(ARM_IDIV_INSTRUCTIONS)
+    return true;
+#else
+    return false;
+#endif
+}
+
+constexpr bool isARM()
+{
+#if CPU(ARM)
     return true;
 #else