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Unified Diff: src/ppc/frames-ppc.h

Issue 714093002: PowerPC specific sub-directories. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 6 years, 1 month ago
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Index: src/ppc/frames-ppc.h
diff --git a/src/ppc/frames-ppc.h b/src/ppc/frames-ppc.h
new file mode 100644
index 0000000000000000000000000000000000000000..f00fa668a88e15b81fc87d8fbefcca5cb5e72847
--- /dev/null
+++ b/src/ppc/frames-ppc.h
@@ -0,0 +1,202 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_PPC_FRAMES_PPC_H_
+#define V8_PPC_FRAMES_PPC_H_
+
+namespace v8 {
+namespace internal {
+
+
+// Register list in load/store instructions
+// Note that the bit values must match those used in actual instruction encoding
+const int kNumRegs = 32;
+
+
+// Caller-saved/arguments registers
+const RegList kJSCallerSaved = 1 << 3 | // r3 a1
+ 1 << 4 | // r4 a2
+ 1 << 5 | // r5 a3
+ 1 << 6 | // r6 a4
+ 1 << 7 | // r7 a5
+ 1 << 8 | // r8 a6
+ 1 << 9 | // r9 a7
+ 1 << 10 | // r10 a8
+ 1 << 11;
+
+const int kNumJSCallerSaved = 9;
+
+// Return the code of the n-th caller-saved register available to JavaScript
+// e.g. JSCallerSavedReg(0) returns r0.code() == 0
+int JSCallerSavedCode(int n);
+
+
+// Callee-saved registers preserved when switching from C to JavaScript
+const RegList kCalleeSaved = 1 << 14 | // r14
+ 1 << 15 | // r15
+ 1 << 16 | // r16
+ 1 << 17 | // r17
+ 1 << 18 | // r18
+ 1 << 19 | // r19
+ 1 << 20 | // r20
+ 1 << 21 | // r21
+ 1 << 22 | // r22
+ 1 << 23 | // r23
+ 1 << 24 | // r24
+ 1 << 25 | // r25
+ 1 << 26 | // r26
+ 1 << 27 | // r27
+ 1 << 28 | // r28
+ 1 << 29 | // r29
+ 1 << 30 | // r20
+ 1 << 31; // r31
+
+
+const int kNumCalleeSaved = 18;
+
+// Number of registers for which space is reserved in safepoints. Must be a
+// multiple of 8.
+// TODO(regis): Only 8 registers may actually be sufficient. Revisit.
+const int kNumSafepointRegisters = 32;
+
+// Define the list of registers actually saved at safepoints.
+// Note that the number of saved registers may be smaller than the reserved
+// space, i.e. kNumSafepointSavedRegisters <= kNumSafepointRegisters.
+const RegList kSafepointSavedRegisters = kJSCallerSaved | kCalleeSaved;
+const int kNumSafepointSavedRegisters = kNumJSCallerSaved + kNumCalleeSaved;
+
+// The following constants describe the stack frame linkage area as
+// defined by the ABI. Note that kNumRequiredStackFrameSlots must
+// satisfy alignment requirements (rounding up if required).
+#if V8_TARGET_ARCH_PPC64 && V8_TARGET_LITTLE_ENDIAN
+// [0] back chain
+// [1] condition register save area
+// [2] link register save area
+// [3] TOC save area
+// [4] Parameter1 save area
+// ...
+// [11] Parameter8 save area
+// [12] Parameter9 slot (if necessary)
+// ...
+const int kNumRequiredStackFrameSlots = 12;
+const int kStackFrameLRSlot = 2;
+const int kStackFrameExtraParamSlot = 12;
+#elif V8_OS_AIX || V8_TARGET_ARCH_PPC64
+// [0] back chain
+// [1] condition register save area
+// [2] link register save area
+// [3] reserved for compiler
+// [4] reserved by binder
+// [5] TOC save area
+// [6] Parameter1 save area
+// ...
+// [13] Parameter8 save area
+// [14] Parameter9 slot (if necessary)
+// ...
+#if V8_TARGET_ARCH_PPC64
+const int kNumRequiredStackFrameSlots = 14;
+#else
+const int kNumRequiredStackFrameSlots = 16;
+#endif
+const int kStackFrameLRSlot = 2;
+const int kStackFrameExtraParamSlot = 14;
+#else
+// [0] back chain
+// [1] link register save area
+// [2] Parameter9 slot (if necessary)
+// ...
+const int kNumRequiredStackFrameSlots = 4;
+const int kStackFrameLRSlot = 1;
+const int kStackFrameExtraParamSlot = 2;
+#endif
+
+// ----------------------------------------------------
+
+
+class EntryFrameConstants : public AllStatic {
+ public:
+ static const int kCallerFPOffset =
+ -(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize);
+};
+
+
+class ExitFrameConstants : public AllStatic {
+ public:
+#if V8_OOL_CONSTANT_POOL
+ static const int kFrameSize = 3 * kPointerSize;
+ static const int kConstantPoolOffset = -3 * kPointerSize;
+#else
+ static const int kFrameSize = 2 * kPointerSize;
+ static const int kConstantPoolOffset = 0; // Not used.
+#endif
+ static const int kCodeOffset = -2 * kPointerSize;
+ static const int kSPOffset = -1 * kPointerSize;
+
+ // The caller fields are below the frame pointer on the stack.
+ static const int kCallerFPOffset = 0 * kPointerSize;
+ // The calling JS function is below FP.
+ static const int kCallerPCOffset = 1 * kPointerSize;
+
+ // FP-relative displacement of the caller's SP. It points just
+ // below the saved PC.
+ static const int kCallerSPDisplacement = 2 * kPointerSize;
+};
+
+
+class JavaScriptFrameConstants : public AllStatic {
+ public:
+ // FP-relative.
+ static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
+ static const int kLastParameterOffset = +2 * kPointerSize;
+ static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
+
+ // Caller SP-relative.
+ static const int kParam0Offset = -2 * kPointerSize;
+ static const int kReceiverOffset = -1 * kPointerSize;
+};
+
+
+class ArgumentsAdaptorFrameConstants : public AllStatic {
+ public:
+ // FP-relative.
+ static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
+
+ static const int kFrameSize =
+ StandardFrameConstants::kFixedFrameSize + kPointerSize;
+};
+
+
+class ConstructFrameConstants : public AllStatic {
+ public:
+ // FP-relative.
+ static const int kImplicitReceiverOffset = -6 * kPointerSize;
+ static const int kConstructorOffset = -5 * kPointerSize;
+ static const int kLengthOffset = -4 * kPointerSize;
+ static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
+
+ static const int kFrameSize =
+ StandardFrameConstants::kFixedFrameSize + 4 * kPointerSize;
+};
+
+
+class InternalFrameConstants : public AllStatic {
+ public:
+ // FP-relative.
+ static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
+};
+
+
+inline Object* JavaScriptFrame::function_slot_object() const {
+ const int offset = JavaScriptFrameConstants::kFunctionOffset;
+ return Memory::Object_at(fp() + offset);
+}
+
+
+inline void StackHandler::SetFp(Address slot, Address fp) {
+ Memory::Address_at(slot) = fp;
+}
+}
+} // namespace v8::internal
+
+#endif // V8_PPC_FRAMES_PPC_H_
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