Update V8 to version 4.1.0.21

This is a cherry-pick of all commits up to and including the
4.1.0.21 cherry-pick in Chromium.

Original commit message:

Version 4.1.0.21 (cherry-pick)

Merged 206e9136bde0f2b5ae8cb77afbb1e7833e5bd412

Unlink pages from the space page list after evacuation.

BUG=430201
LOG=N
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/953813002

Cr-Commit-Position: refs/branch-heads/4.1@{#22}
Cr-Branched-From: 2e08d2a7aa9d65d269d8c57aba82eb38a8cb0a18-refs/heads/candidates@{#25353}

---

FPIIM-449

Change-Id: I8c23c7bbb70772b4858fe8a47b64fa97ee0d1f8c
diff --git a/src/compiler/mips64/instruction-codes-mips64.h b/src/compiler/mips64/instruction-codes-mips64.h
new file mode 100644
index 0000000..dd019f9
--- /dev/null
+++ b/src/compiler/mips64/instruction-codes-mips64.h
@@ -0,0 +1,108 @@
+// 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_COMPILER_MIPS_INSTRUCTION_CODES_MIPS_H_
+#define V8_COMPILER_MIPS_INSTRUCTION_CODES_MIPS_H_
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+// MIPS64-specific opcodes that specify which assembly sequence to emit.
+// Most opcodes specify a single instruction.
+#define TARGET_ARCH_OPCODE_LIST(V) \
+  V(Mips64Add)                     \
+  V(Mips64Dadd)                    \
+  V(Mips64Sub)                     \
+  V(Mips64Dsub)                    \
+  V(Mips64Mul)                     \
+  V(Mips64MulHigh)                 \
+  V(Mips64MulHighU)                \
+  V(Mips64Dmul)                    \
+  V(Mips64Div)                     \
+  V(Mips64Ddiv)                    \
+  V(Mips64DivU)                    \
+  V(Mips64DdivU)                   \
+  V(Mips64Mod)                     \
+  V(Mips64Dmod)                    \
+  V(Mips64ModU)                    \
+  V(Mips64DmodU)                   \
+  V(Mips64And)                     \
+  V(Mips64Or)                      \
+  V(Mips64Xor)                     \
+  V(Mips64Shl)                     \
+  V(Mips64Shr)                     \
+  V(Mips64Sar)                     \
+  V(Mips64Ext)                     \
+  V(Mips64Dext)                    \
+  V(Mips64Dshl)                    \
+  V(Mips64Dshr)                    \
+  V(Mips64Dsar)                    \
+  V(Mips64Ror)                     \
+  V(Mips64Dror)                    \
+  V(Mips64Mov)                     \
+  V(Mips64Tst)                     \
+  V(Mips64Tst32)                   \
+  V(Mips64Cmp)                     \
+  V(Mips64Cmp32)                   \
+  V(Mips64CmpD)                    \
+  V(Mips64AddD)                    \
+  V(Mips64SubD)                    \
+  V(Mips64MulD)                    \
+  V(Mips64DivD)                    \
+  V(Mips64ModD)                    \
+  V(Mips64SqrtD)                   \
+  V(Mips64Float64Floor)            \
+  V(Mips64Float64Ceil)             \
+  V(Mips64Float64RoundTruncate)    \
+  V(Mips64CvtSD)                   \
+  V(Mips64CvtDS)                   \
+  V(Mips64TruncWD)                 \
+  V(Mips64TruncUwD)                \
+  V(Mips64CvtDW)                   \
+  V(Mips64CvtDUw)                  \
+  V(Mips64Lb)                      \
+  V(Mips64Lbu)                     \
+  V(Mips64Sb)                      \
+  V(Mips64Lh)                      \
+  V(Mips64Lhu)                     \
+  V(Mips64Sh)                      \
+  V(Mips64Ld)                      \
+  V(Mips64Lw)                      \
+  V(Mips64Sw)                      \
+  V(Mips64Sd)                      \
+  V(Mips64Lwc1)                    \
+  V(Mips64Swc1)                    \
+  V(Mips64Ldc1)                    \
+  V(Mips64Sdc1)                    \
+  V(Mips64Push)                    \
+  V(Mips64StoreToStackSlot)        \
+  V(Mips64StackClaim)              \
+  V(Mips64StoreWriteBarrier)
+
+
+// Addressing modes represent the "shape" of inputs to an instruction.
+// Many instructions support multiple addressing modes. Addressing modes
+// are encoded into the InstructionCode of the instruction and tell the
+// code generator after register allocation which assembler method to call.
+//
+// We use the following local notation for addressing modes:
+//
+// R = register
+// O = register or stack slot
+// D = double register
+// I = immediate (handle, external, int32)
+// MRI = [register + immediate]
+// MRR = [register + register]
+// TODO(plind): Add the new r6 address modes.
+#define TARGET_ADDRESSING_MODE_LIST(V) \
+  V(MRI) /* [%r0 + K] */               \
+  V(MRR) /* [%r0 + %r1] */
+
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_COMPILER_MIPS_INSTRUCTION_CODES_MIPS_H_