The Tor Browser: js/src/jit/mips/Architecture-mips.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * vim: set ts=8 sts=4 et sw=4 tw=99:

     3  * This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #include "jit/mips/Architecture-mips.h"

     9 #include <elf.h>

    11 #include <fcntl.h>

    12 #include <unistd.h>

    14 #define HWCAP_MIPS (1 << 31)

    15 #define HWCAP_FPU (1 << 0)

    17 namespace js {

    18 namespace jit {

    20 uint32_t GetMIPSFlags()

    21 {

    22     static bool isSet = false;

    23     static uint32_t flags = 0;

    24     if (isSet)

    25         return flags;

    26 #if WTF_OS_LINUX

    27     FILE *fp = fopen("/proc/cpuinfo", "r");

    28     if (!fp)

    29         return false;

    31     char buf[1024];

    32     memset(buf, 0, sizeof(buf));

    33     fread(buf, sizeof(char), sizeof(buf)-1, fp);

    34     fclose(fp);

    35     if (strstr(buf, "FPU"))

    36         flags |= HWCAP_FPU;

    38     isSet = true;

    39     return flags;

    40 #endif

    42     return false;

    43 }

    45 bool hasFPU()

    46 {

    47     return js::jit::GetMIPSFlags() & HWCAP_FPU;

    48 }

    50 Registers::Code

    51 Registers::FromName(const char *name)

    52 {

    53     for (size_t i = 0; i < Total; i++) {

    54         if (strcmp(GetName(i), name) == 0)

    55             return Code(i);

    56     }

    58     return Invalid;

    59 }

    61 FloatRegisters::Code

    62 FloatRegisters::FromName(const char *name)

    63 {

    64     for (size_t i = 0; i < Total; i++) {

    65         if (strcmp(GetName(i), name) == 0)

    66             return Code(i);

    67     }

    69     return Invalid;

    70 }

    74 } // namespace ion

    75 } // namespace js

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