From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- mozglue/build/mips.cpp | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 mozglue/build/mips.cpp (limited to 'mozglue/build/mips.cpp') diff --git a/mozglue/build/mips.cpp b/mozglue/build/mips.cpp new file mode 100644 index 0000000000..7166080f5e --- /dev/null +++ b/mozglue/build/mips.cpp @@ -0,0 +1,42 @@ +/* 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 +#include +#include + +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 -- cgit v1.2.3