Changeset 44523 in webkit for trunk/JavaScriptCore/jit/JIT.h

Timestamp:

Jun 8, 2009, 11:52:25 PM (16 years ago)

Author:

[email protected]

Message:

2009-06-08 Gavin Barraclough <​[email protected]>

Reviewed by Geoff Garen.

Enable JS language JIT for ARM thumb2 platforms. Add ARMv7 specific
asm & constants, add appropriate configuration switches to Platform.h.

Landing this disabled until jump linking is completed (see YARR jit patch).

• assembler/MacroAssemblerARMv7.h: (JSC::MacroAssemblerARMv7::load32):

Fix: should load pointer with ImmPtr not Imm32.

(JSC::MacroAssemblerARMv7::store32):

Fix: should load pointer with ImmPtr not Imm32.

(JSC::MacroAssemblerARMv7::move):

Fix: When moving an Imm32 that is actually a pointer, should call movT3()
not mov(), to ensure code generation is repeatable (for exception handling).

• jit/JIT.cpp: (JSC::JIT::privateCompileCTIMachineTrampolines):

Disable JIT_OPTIMIZE_NATIVE_CALL specific code generation if the optimization is not enabled.

• jit/JIT.h:

Add ARMv7 specific values of constants & register names.

• jit/JITInlineMethods.h: (JSC::JIT::preverveReturnAddressAfterCall): (JSC::JIT::restoreReturnAddressBeforeReturn): (JSC::JIT::restoreArgumentReferenceForTrampoline):

Implement for ARMv7 (move value to/from lr).

• jit/JITStubs.cpp:

Add JIT entry/thow trampolines, add macro to add thunk wrapper around stub routines.

• jit/JITStubs.h: (JSC::JITStackFrame::returnAddressSlot):

Add ARMv7 stack frame object.

• wtf/Platform.h:

Add changes necessary to allow JIT to build on this platform, disabled.

File:

• trunk/JavaScriptCore/jit/JIT.h (modified) (3 diffs)

trunk/JavaScriptCore/jit/JIT.h

@@ -229 +229 @@
         static const FPRegisterID fpRegT1 = X86::xmm1;
         static const FPRegisterID fpRegT2 = X86::xmm2;
+#elif PLATFORM(ARM_V7)
+        static const RegisterID returnValueRegister = ARM::r0;
+        static const RegisterID cachedResultRegister = ARM::r0;
+        static const RegisterID firstArgumentRegister = ARM::r0;
+
+        static const RegisterID regT0 = ARM::r0;
+        static const RegisterID regT1 = ARM::r1;
+        static const RegisterID regT2 = ARM::r2;
+        static const RegisterID regT3 = ARM::r4;
+
+        static const RegisterID callFrameRegister = ARM::r5;
+        static const RegisterID timeoutCheckRegister = ARM::r6;
+
+        static const FPRegisterID fpRegT0 = ARM::d0;
+        static const FPRegisterID fpRegT1 = ARM::d1;
+        static const FPRegisterID fpRegT2 = ARM::d2;
 #else
     #error "JIT not supported on this platform."
@@ -261 +277 @@
         static const int patchOffsetMethodCheckProtoStruct = 30;
         static const int patchOffsetMethodCheckPutFunction = 50;
-#else
+#elif PLATFORM(X86)
         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
         static const int patchOffsetPutByIdStructure = 7;
@@ -288 +304 @@
         static const int patchOffsetMethodCheckProtoStruct = 18;
         static const int patchOffsetMethodCheckPutFunction = 29;
+#elif PLATFORM(ARM_V7)
+        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
+        static const int patchOffsetPutByIdStructure = 10;
+        static const int patchOffsetPutByIdExternalLoad = 20;
+        static const int patchLengthPutByIdExternalLoad = 12;
+        static const int patchOffsetPutByIdPropertyMapOffset = 40;
+        // These architecture specific value are used to enable patching - see comment on op_get_by_id.
+        static const int patchOffsetGetByIdStructure = 10;
+        static const int patchOffsetGetByIdBranchToSlowCase = 20;
+        static const int patchOffsetGetByIdExternalLoad = 20;
+        static const int patchLengthGetByIdExternalLoad = 12;
+        static const int patchOffsetGetByIdPropertyMapOffset = 40;
+        static const int patchOffsetGetByIdPutResult = 44;
+#if ENABLE(OPCODE_SAMPLING)
+        static const int patchOffsetGetByIdSlowCaseCall = 0; // FIMXE
+#else
+        static const int patchOffsetGetByIdSlowCaseCall = 28;
+#endif
+        static const int patchOffsetOpCallCompareToJump = 10;
+
+        static const int patchOffsetMethodCheckProtoObj = 18;
+        static const int patchOffsetMethodCheckProtoStruct = 28;
+        static const int patchOffsetMethodCheckPutFunction = 46;
 #endif