1 files changed, 144 insertions, 0 deletions
diff --git a/js/src/jit/arm/disasm/Constants-arm.cpp b/js/src/jit/arm/disasm/Constants-arm.cpp
new file mode 100644
index 000000000..2201a85e7
--- /dev/null
+++ b/js/src/jit/arm/disasm/Constants-arm.cpp
@@ -0,0 +1,144 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ */
+// Copyright 2009 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.
+
+#include "jit/arm/disasm/Constants-arm.h"
+
+#ifdef JS_DISASM_ARM
+
+namespace js {
+namespace jit {
+namespace disasm {
+
+double
+Instruction::DoubleImmedVmov() const
+{
+    // Reconstruct a double from the immediate encoded in the vmov instruction.
+    //
+    //   instruction: [xxxxxxxx,xxxxabcd,xxxxxxxx,xxxxefgh]
+    //   double: [aBbbbbbb,bbcdefgh,00000000,00000000,
+    //            00000000,00000000,00000000,00000000]
+    //
+    // where B = ~b. Only the high 16 bits are affected.
+    uint64_t high16;
+    high16  = (Bits(17, 16) << 4) | Bits(3, 0);   // xxxxxxxx,xxcdefgh.
+    high16 |= (0xff * Bit(18)) << 6;              // xxbbbbbb,bbxxxxxx.
+    high16 |= (Bit(18) ^ 1) << 14;                // xBxxxxxx,xxxxxxxx.
+    high16 |= Bit(19) << 15;                      // axxxxxxx,xxxxxxxx.
+
+    uint64_t imm = high16 << 48;
+    double d;
+    memcpy(&d, &imm, 8);
+    return d;
+}
+
+
+// These register names are defined in a way to match the native disassembler
+// formatting. See for example the command "objdump -d <binary file>".
+const char* Registers::names_[kNumRegisters] = {
+    "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+    "r8", "r9", "r10", "fp", "ip", "sp", "lr", "pc",
+};
+
+
+// List of alias names which can be used when referring to ARM registers.
+const Registers::RegisterAlias Registers::aliases_[] = {
+    {10, "sl"},
+    {11, "r11"},
+    {12, "r12"},
+    {13, "r13"},
+    {14, "r14"},
+    {15, "r15"},
+    {kNoRegister, NULL}
+};
+
+
+const char*
+Registers::Name(int reg)
+{
+    const char* result;
+    if ((0 <= reg) && (reg < kNumRegisters)) {
+        result = names_[reg];
+    } else {
+        result = "noreg";
+    }
+    return result;
+}
+
+
+// Support for VFP registers s0 to s31 (d0 to d15) and d16-d31.
+// Note that "sN:sM" is the same as "dN/2" up to d15.
+// These register names are defined in a way to match the native disassembler
+// formatting. See for example the command "objdump -d <binary file>".
+const char* VFPRegisters::names_[kNumVFPRegisters] = {
+    "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
+    "s8", "s9", "s10", "s11", "s12", "s13", "s14", "s15",
+    "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23",
+    "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31",
+    "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
+    "d8", "d9", "d10", "d11", "d12", "d13", "d14", "d15",
+    "d16", "d17", "d18", "d19", "d20", "d21", "d22", "d23",
+    "d24", "d25", "d26", "d27", "d28", "d29", "d30", "d31"
+};
+
+
+const char*
+VFPRegisters::Name(int reg, bool is_double)
+{
+    MOZ_ASSERT((0 <= reg) && (reg < kNumVFPRegisters));
+    return names_[reg + (is_double ? kNumVFPSingleRegisters : 0)];
+}
+
+
+int
+VFPRegisters::Number(const char* name, bool* is_double)
+{
+    for (int i = 0; i < kNumVFPRegisters; i++) {
+        if (strcmp(names_[i], name) == 0) {
+            if (i < kNumVFPSingleRegisters) {
+                *is_double = false;
+                return i;
+            } else {
+                *is_double = true;
+                return i - kNumVFPSingleRegisters;
+            }
+        }
+    }
+
+    // No register with the requested name found.
+    return kNoRegister;
+}
+
+
+int
+Registers::Number(const char* name)
+{
+    // Look through the canonical names.
+    for (int i = 0; i < kNumRegisters; i++) {
+        if (strcmp(names_[i], name) == 0) {
+            return i;
+        }
+    }
+
+    // Look through the alias names.
+    int i = 0;
+    while (aliases_[i].reg != kNoRegister) {
+        if (strcmp(aliases_[i].name, name) == 0) {
+            return aliases_[i].reg;
+        }
+        i++;
+    }
+
+    // No register with the requested name found.
+    return kNoRegister;
+}
+
+
+}  // namespace disasm
+}  // namespace jit
+}  // namespace js
+
+#endif // JS_DISASM_ARM