mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-26 06:11:37 +00:00
181 lines
6.1 KiB
C++
181 lines
6.1 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is arm.h
|
|
*
|
|
* The Initial Developer of the Original Code is the Mozilla Foundation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2011
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Timothy B. Terriberry <tterriberry@mozilla.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/* compile-time and runtime tests for whether to use SSE instructions */
|
|
|
|
#ifndef mozilla_arm_h_
|
|
#define mozilla_arm_h_
|
|
|
|
// for definition of NS_COM_GLUE
|
|
#include "nscore.h"
|
|
|
|
/* This is patterned after SSE.h, but provides ARMv5E, ARMv6, and NEON
|
|
detection. For reasons similar to the SSE code, code using NEON (even just
|
|
in inline asm) needs to be in a separate compilation unit from the regular
|
|
code, because it requires an ".fpu neon" directive which can't be undone.
|
|
ARMv5E and ARMv6 code may also require an .arch directive, since by default
|
|
the assembler refuses to generate code for opcodes outside of its current
|
|
.arch setting.
|
|
|
|
TODO: Add Thumb, Thumb2, VFP, iwMMX, etc. detection, if we need it. */
|
|
|
|
#if defined(__GNUC__) && defined(__arm__)
|
|
|
|
# define MOZILLA_ARM_ARCH 3
|
|
|
|
# if defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) \
|
|
|| defined(_ARM_ARCH_4)
|
|
# undef MOZILLA_ARM_ARCH
|
|
# define MOZILLA_ARM_ARCH 4
|
|
# endif
|
|
|
|
# if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) \
|
|
|| defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) \
|
|
|| defined(__ARM_ARCH_5TEJ__) || defined(_ARM_ARCH_5)
|
|
# undef MOZILLA_ARM_ARCH
|
|
# define MOZILLA_ARM_ARCH 5
|
|
# endif
|
|
|
|
# if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \
|
|
|| defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \
|
|
|| defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) \
|
|
|| defined(__ARM_ARCH_6M__) || defined(_ARM_ARCH_6)
|
|
# undef MOZILLA_ARM_ARCH
|
|
# define MOZILLA_ARM_ARCH 6
|
|
# endif
|
|
|
|
# if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \
|
|
|| defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \
|
|
|| defined(__ARM_ARCH_7EM__) || defined(_ARM_ARCH_7)
|
|
# undef MOZILLA_ARM_ARCH
|
|
# define MOZILLA_ARM_ARCH 7
|
|
# endif
|
|
|
|
|
|
# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
|
|
# define MOZILLA_MAY_SUPPORT_EDSP 1
|
|
# endif
|
|
|
|
# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
|
|
# if defined(HAVE_ARM_SIMD)
|
|
# define MOZILLA_MAY_SUPPORT_ARMV6 1
|
|
# endif
|
|
# endif
|
|
|
|
// Technically 4.2.x only works in the CodeSourcery releases, but I don't
|
|
// know how to detect those separately from mainline gcc (which got support
|
|
// in 4.3). The Maemo version 5 SDK shipped with the CodeSourcery 4.2.1
|
|
// release, which we need to work.
|
|
# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2)
|
|
# if defined(HAVE_ARM_NEON)
|
|
# define MOZILLA_MAY_SUPPORT_NEON 1
|
|
# endif
|
|
# endif
|
|
|
|
// Currently we only have CPU detection for Linux via /proc/cpuinfo
|
|
# if defined(__linux__) || defined(ANDROID)
|
|
# define MOZILLA_ARM_HAVE_CPUID_DETECTION 1
|
|
# endif
|
|
|
|
#elif defined(_MSC_VER) && defined(_M_ARM)
|
|
|
|
# define MOZILLA_ARM_HAVE_CPUID_DETECTION 1
|
|
// I don't know how to do arch detection at compile time for MSVC, so assume
|
|
// the worst for now.
|
|
# define MOZILLA_ARM_ARCH 3
|
|
|
|
// MSVC only allows external asm for ARM, so we don't have to rely on
|
|
// compiler support.
|
|
# define MOZILLA_MAY_SUPPORT_EDSP 1
|
|
# if defined(HAVE_ARM_SIMD)
|
|
# define MOZILLA_MAY_SUPPORT_ARMV6 1
|
|
# endif
|
|
# if defined(HAVE_ARM_SIMD)
|
|
# define MOZILLA_MAY_SUPPORT_NEON 1
|
|
# endif
|
|
|
|
#endif
|
|
|
|
namespace mozilla {
|
|
|
|
namespace arm_private {
|
|
#if defined(MOZILLA_ARM_HAVE_CPUID_DETECTION)
|
|
#if !defined(MOZILLA_PRESUME_EDSP)
|
|
extern bool NS_COM_GLUE edsp_enabled;
|
|
#endif
|
|
#if !defined(MOZILLA_PRESUME_ARMV6)
|
|
extern bool NS_COM_GLUE armv6_enabled;
|
|
#endif
|
|
#if !defined(MOZILLA_PRESUME_NEON)
|
|
extern bool NS_COM_GLUE neon_enabled;
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
#if defined(MOZILLA_PRESUME_EDSP)
|
|
# define MOZILLA_MAY_SUPPORT_EDSP 1
|
|
inline bool supports_edsp() { return true; }
|
|
#elif defined(MOZILLA_MAY_SUPPORT_EDSP) \
|
|
&& defined(MOZILLA_ARM_HAVE_CPUID_DETECTION)
|
|
inline bool supports_edsp() { return arm_private::edsp_enabled; }
|
|
#else
|
|
inline bool supports_edsp() { return false; }
|
|
#endif
|
|
|
|
#if defined(MOZILLA_PRESUME_ARMV6)
|
|
# define MOZILLA_MAY_SUPPORT_ARMV6 1
|
|
inline bool supports_armv6() { return true; }
|
|
#elif defined(MOZILLA_MAY_SUPPORT_ARMV6) \
|
|
&& defined(MOZILLA_ARM_HAVE_CPUID_DETECTION)
|
|
inline bool supports_armv6() { return arm_private::armv6_enabled; }
|
|
#else
|
|
inline bool supports_armv6() { return false; }
|
|
#endif
|
|
|
|
#if defined(MOZILLA_PRESUME_NEON)
|
|
# define MOZILLA_MAY_SUPPORT_NEON 1
|
|
inline bool supports_neon() { return true; }
|
|
#elif defined(MOZILLA_MAY_SUPPORT_NEON) \
|
|
&& defined(MOZILLA_ARM_HAVE_CPUID_DETECTION)
|
|
inline bool supports_neon() { return arm_private::neon_enabled; }
|
|
#else
|
|
inline bool supports_neon() { return false; }
|
|
#endif
|
|
|
|
}
|
|
|
|
#endif /* !defined(mozilla_arm_h_) */
|