1 files changed, 77 insertions, 0 deletions
diff --git a/js/src/jit/mips-shared/Architecture-mips-shared.cpp b/js/src/jit/mips-shared/Architecture-mips-shared.cpp
new file mode 100644
index 000000000..4fcf2c90e
--- /dev/null
+++ b/js/src/jit/mips-shared/Architecture-mips-shared.cpp
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * 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/. */
+
+#include "jit/mips-shared/Architecture-mips-shared.h"
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "jit/RegisterSets.h"
+
+#define HWCAP_MIPS (1 << 28)
+#define HWCAP_LOONGSON (1 << 27)
+#define HWCAP_FPU (1 << 0)
+
+namespace js {
+namespace jit {
+
+static uint32_t
+get_mips_flags()
+{
+    uint32_t flags = HWCAP_MIPS;
+
+#if defined(JS_SIMULATOR_MIPS32) || defined(JS_SIMULATOR_MIPS64)
+    flags |= HWCAP_FPU;
+#else
+# ifdef __linux__
+    FILE* fp = fopen("/proc/cpuinfo", "r");
+    if (!fp)
+        return flags;
+
+    char buf[1024];
+    memset(buf, 0, sizeof(buf));
+    fread(buf, sizeof(char), sizeof(buf) - 1, fp);
+    fclose(fp);
+    if (strstr(buf, "FPU"))
+        flags |= HWCAP_FPU;
+    if (strstr(buf, "Loongson"))
+        flags |= HWCAP_LOONGSON;
+# endif
+#endif // JS_SIMULATOR_MIPS32 || JS_SIMULATOR_MIPS64
+    return flags;
+}
+
+static bool check_fpu()
+{
+    return mips_private::Flags & HWCAP_FPU;
+}
+
+static bool check_loongson()
+{
+    return mips_private::Flags & HWCAP_LOONGSON;
+}
+
+namespace mips_private {
+    // Cache a local copy so we only have to read /proc/cpuinfo once.
+    uint32_t Flags = get_mips_flags();
+    bool hasFPU = check_fpu();;
+    bool isLoongson = check_loongson();
+}
+
+Registers::Code
+Registers::FromName(const char* name)
+{
+    for (size_t i = 0; i < Total; i++) {
+        if (strcmp(GetName(i), name) == 0)
+            return Code(i);
+    }
+
+    return Invalid;
+}
+
+} // namespace ion
+} // namespace js
+