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/* 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/. */
/* compile-time and runtime tests for whether to use MIPS-specific extensions */
#include "mips.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
enum {
MIPS_FLAG_LOONGSON3 = 1,
};
static unsigned get_mips_cpu_flags(void) {
unsigned flags = 0;
FILE* fin;
fin = fopen("/proc/cpuinfo", "r");
if (fin != nullptr) {
char buf[1024];
memset(buf, 0, sizeof(buf));
fread(buf, sizeof(char), sizeof(buf) - 1, fin);
fclose(fin);
if (strstr(buf, "Loongson-3")) flags |= MIPS_FLAG_LOONGSON3;
}
return flags;
}
static bool check_loongson3(void) {
// Cache a local copy so we only have to read /proc/cpuinfo once.
static unsigned mips_cpu_flags = get_mips_cpu_flags();
return (mips_cpu_flags & MIPS_FLAG_LOONGSON3) != 0;
}
namespace mozilla {
namespace mips_private {
bool isLoongson3 = check_loongson3();
} // namespace mips_private
} // namespace mozilla