Update our copy of libvixl to upstream's 1.12 release. The major benefit from QEMU's point of view is that some instructions previously disassembled as "unimplemented (System)" are now displayed as something more useful. It also fixes some warnings about format strings that newer w64-mingw32 compilers were emitting. We didn't have any local changes to libvixl so nothing needed to be forward-ported. Although this is a large commit (due to upstream renaming most of the files), only a few of the files changed in this commit are not just straight copies of upstream libvixl files: disas/arm-a64.cc disas/libvixl/Makefile.objs disas/libvixl/README Note that this commit introduces some signed-unsigned comparison warnings on the old mingw compilers. Those compilers have broken TLS support anyway so have only ever been much use for compile tests; anybody still using them should add -Wno-sign-compare to their --extra-cflags. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
156 lines
5.7 KiB
C++
156 lines
5.7 KiB
C++
// Copyright 2015, ARM Limited
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of ARM Limited nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef VIXL_COMPILER_INTRINSICS_H
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#define VIXL_COMPILER_INTRINSICS_H
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#include "globals.h"
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namespace vixl {
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// Helper to check whether the version of GCC used is greater than the specified
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// requirement.
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#define MAJOR 1000000
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#define MINOR 1000
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#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
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#define GCC_VERSION_OR_NEWER(major, minor, patchlevel) \
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((__GNUC__ * MAJOR + __GNUC_MINOR__ * MINOR + __GNUC_PATCHLEVEL__) >= \
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((major) * MAJOR + (minor) * MINOR + (patchlevel)))
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#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
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#define GCC_VERSION_OR_NEWER(major, minor, patchlevel) \
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((__GNUC__ * MAJOR + __GNUC_MINOR__ * MINOR) >= \
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((major) * MAJOR + (minor) * MINOR + (patchlevel)))
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#else
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#define GCC_VERSION_OR_NEWER(major, minor, patchlevel) 0
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#endif
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#if defined(__clang__) && !defined(VIXL_NO_COMPILER_BUILTINS)
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#define COMPILER_HAS_BUILTIN_CLRSB (__has_builtin(__builtin_clrsb))
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#define COMPILER_HAS_BUILTIN_CLZ (__has_builtin(__builtin_clz))
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#define COMPILER_HAS_BUILTIN_CTZ (__has_builtin(__builtin_ctz))
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#define COMPILER_HAS_BUILTIN_FFS (__has_builtin(__builtin_ffs))
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#define COMPILER_HAS_BUILTIN_POPCOUNT (__has_builtin(__builtin_popcount))
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#elif defined(__GNUC__) && !defined(VIXL_NO_COMPILER_BUILTINS)
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// The documentation for these builtins is available at:
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// https://gcc.gnu.org/onlinedocs/gcc-$MAJOR.$MINOR.$PATCHLEVEL/gcc//Other-Builtins.html
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# define COMPILER_HAS_BUILTIN_CLRSB (GCC_VERSION_OR_NEWER(4, 7, 0))
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# define COMPILER_HAS_BUILTIN_CLZ (GCC_VERSION_OR_NEWER(3, 4, 0))
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# define COMPILER_HAS_BUILTIN_CTZ (GCC_VERSION_OR_NEWER(3, 4, 0))
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# define COMPILER_HAS_BUILTIN_FFS (GCC_VERSION_OR_NEWER(3, 4, 0))
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# define COMPILER_HAS_BUILTIN_POPCOUNT (GCC_VERSION_OR_NEWER(3, 4, 0))
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#else
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// One can define VIXL_NO_COMPILER_BUILTINS to force using the manually
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// implemented C++ methods.
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#define COMPILER_HAS_BUILTIN_BSWAP false
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#define COMPILER_HAS_BUILTIN_CLRSB false
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#define COMPILER_HAS_BUILTIN_CLZ false
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#define COMPILER_HAS_BUILTIN_CTZ false
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#define COMPILER_HAS_BUILTIN_FFS false
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#define COMPILER_HAS_BUILTIN_POPCOUNT false
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#endif
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template<typename V>
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inline bool IsPowerOf2(V value) {
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return (value != 0) && ((value & (value - 1)) == 0);
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}
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// Declaration of fallback functions.
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int CountLeadingSignBitsFallBack(int64_t value, int width);
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int CountLeadingZerosFallBack(uint64_t value, int width);
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int CountSetBitsFallBack(uint64_t value, int width);
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int CountTrailingZerosFallBack(uint64_t value, int width);
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// Implementation of intrinsics functions.
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// TODO: The implementations could be improved for sizes different from 32bit
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// and 64bit: we could mask the values and call the appropriate builtin.
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template<typename V>
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inline int CountLeadingSignBits(V value, int width = (sizeof(V) * 8)) {
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#if COMPILER_HAS_BUILTIN_CLRSB
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if (width == 32) {
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return __builtin_clrsb(value);
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} else if (width == 64) {
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return __builtin_clrsbll(value);
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}
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#endif
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return CountLeadingSignBitsFallBack(value, width);
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}
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template<typename V>
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inline int CountLeadingZeros(V value, int width = (sizeof(V) * 8)) {
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#if COMPILER_HAS_BUILTIN_CLZ
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if (width == 32) {
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return (value == 0) ? 32 : __builtin_clz(static_cast<unsigned>(value));
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} else if (width == 64) {
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return (value == 0) ? 64 : __builtin_clzll(value);
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}
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#endif
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return CountLeadingZerosFallBack(value, width);
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}
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template<typename V>
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inline int CountSetBits(V value, int width = (sizeof(V) * 8)) {
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#if COMPILER_HAS_BUILTIN_POPCOUNT
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if (width == 32) {
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return __builtin_popcount(static_cast<unsigned>(value));
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} else if (width == 64) {
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return __builtin_popcountll(value);
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}
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#endif
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return CountSetBitsFallBack(value, width);
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}
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template<typename V>
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inline int CountTrailingZeros(V value, int width = (sizeof(V) * 8)) {
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#if COMPILER_HAS_BUILTIN_CTZ
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if (width == 32) {
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return (value == 0) ? 32 : __builtin_ctz(static_cast<unsigned>(value));
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} else if (width == 64) {
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return (value == 0) ? 64 : __builtin_ctzll(value);
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}
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#endif
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return CountTrailingZerosFallBack(value, width);
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}
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} // namespace vixl
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#endif // VIXL_COMPILER_INTRINSICS_H
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