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-rw-r--r--js/src/jit/arm/SharedICHelpers-arm-inl.h79
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diff --git a/js/src/jit/arm/SharedICHelpers-arm-inl.h b/js/src/jit/arm/SharedICHelpers-arm-inl.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef jit_arm_SharedICHelpers_arm_inl_h
+#define jit_arm_SharedICHelpers_arm_inl_h
+
+#include "jit/BaselineFrame.h"
+#include "jit/SharedICHelpers.h"
+
+#include "jit/MacroAssembler-inl.h"
+
+namespace js {
+namespace jit {
+
+inline void EmitBaselineTailCallVM(TrampolinePtr target, MacroAssembler& masm,
+ uint32_t argSize) {
+#ifdef DEBUG
+ // We assume during this that R0 and R1 have been pushed, and that R2 is
+ // unused.
+ static_assert(R2 == ValueOperand(r1, r0));
+
+ // Store frame size without VMFunction arguments for debug assertions.
+ masm.movePtr(FramePointer, r0);
+ masm.ma_sub(StackPointer, r0);
+ masm.sub32(Imm32(argSize), r0);
+ Address frameSizeAddr(FramePointer,
+ BaselineFrame::reverseOffsetOfDebugFrameSize());
+ masm.store32(r0, frameSizeAddr);
+#endif
+
+ // Push frame descriptor and perform the tail call.
+ // ICTailCallReg (lr) already contains the return address (as we keep
+ // it there through the stub calls), but the VMWrapper code being called
+ // expects the return address to also be pushed on the stack.
+ static_assert(ICTailCallReg == lr);
+ masm.pushFrameDescriptor(FrameType::BaselineJS);
+ masm.push(lr);
+ masm.jump(target);
+}
+
+inline void EmitBaselineCallVM(TrampolinePtr target, MacroAssembler& masm) {
+ masm.pushFrameDescriptor(FrameType::BaselineStub);
+ masm.call(target);
+}
+
+inline void EmitBaselineEnterStubFrame(MacroAssembler& masm, Register scratch) {
+ MOZ_ASSERT(scratch != ICTailCallReg);
+
+#ifdef DEBUG
+ // Compute frame size.
+ masm.mov(FramePointer, scratch);
+ masm.ma_sub(StackPointer, scratch);
+
+ Address frameSizeAddr(FramePointer,
+ BaselineFrame::reverseOffsetOfDebugFrameSize());
+ masm.store32(scratch, frameSizeAddr);
+#endif
+
+ // Push frame descriptor and return address.
+ masm.PushFrameDescriptor(FrameType::BaselineJS);
+ masm.Push(ICTailCallReg);
+
+ // Save old frame pointer, stack pointer and stub reg.
+ masm.Push(FramePointer);
+ masm.mov(StackPointer, FramePointer);
+
+ masm.Push(ICStubReg);
+
+ // We pushed 4 words, so the stack is still aligned to 8 bytes.
+ masm.checkStackAlignment();
+}
+
+} // namespace jit
+} // namespace js
+
+#endif /* jit_arm_SharedICHelpers_arm_inl_h */