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1.1
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1.1
log
@Initial revision
@
text
@// Simd PowerPC specific implementations -*- C++ -*-
// Copyright (C) 2020-2022 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// .
#ifndef _GLIBCXX_EXPERIMENTAL_SIMD_PPC_H_
#define _GLIBCXX_EXPERIMENTAL_SIMD_PPC_H_
#if __cplusplus >= 201703L
#ifndef __ALTIVEC__
#error "simd_ppc.h may only be included when AltiVec/VMX is available"
#endif
#include
_GLIBCXX_SIMD_BEGIN_NAMESPACE
// _SimdImplPpc {{{
template
struct _SimdImplPpc : _SimdImplBuiltin<_Abi>
{
using _Base = _SimdImplBuiltin<_Abi>;
// Byte and halfword shift instructions on PPC only consider the low 3 or 4
// bits of the RHS. Consequently, shifting by sizeof(_Tp)*CHAR_BIT (or more)
// is UB without extra measures. To match scalar behavior, byte and halfword
// shifts need an extra fixup step.
// _S_bit_shift_left {{{
template
_GLIBCXX_SIMD_INTRINSIC static constexpr _SimdWrapper<_Tp, _Np>
_S_bit_shift_left(_SimdWrapper<_Tp, _Np> __x, _SimdWrapper<_Tp, _Np> __y)
{
__x = _Base::_S_bit_shift_left(__x, __y);
if constexpr (sizeof(_Tp) < sizeof(int))
__x._M_data
= (__y._M_data < sizeof(_Tp) * __CHAR_BIT__) & __x._M_data;
return __x;
}
template
_GLIBCXX_SIMD_INTRINSIC static constexpr _SimdWrapper<_Tp, _Np>
_S_bit_shift_left(_SimdWrapper<_Tp, _Np> __x, int __y)
{
__x = _Base::_S_bit_shift_left(__x, __y);
if constexpr (sizeof(_Tp) < sizeof(int))
{
if (__y >= sizeof(_Tp) * __CHAR_BIT__)
return {};
}
return __x;
}
// }}}
// _S_bit_shift_right {{{
template
_GLIBCXX_SIMD_INTRINSIC static constexpr _SimdWrapper<_Tp, _Np>
_S_bit_shift_right(_SimdWrapper<_Tp, _Np> __x, _SimdWrapper<_Tp, _Np> __y)
{
if constexpr (sizeof(_Tp) < sizeof(int))
{
constexpr int __nbits = sizeof(_Tp) * __CHAR_BIT__;
if constexpr (is_unsigned_v<_Tp>)
return (__y._M_data < __nbits)
& _Base::_S_bit_shift_right(__x, __y)._M_data;
else
{
_Base::_S_masked_assign(_SimdWrapper<_Tp, _Np>(__y._M_data
>= __nbits),
__y, __nbits - 1);
return _Base::_S_bit_shift_right(__x, __y);
}
}
else
return _Base::_S_bit_shift_right(__x, __y);
}
template
_GLIBCXX_SIMD_INTRINSIC static constexpr _SimdWrapper<_Tp, _Np>
_S_bit_shift_right(_SimdWrapper<_Tp, _Np> __x, int __y)
{
if constexpr (sizeof(_Tp) < sizeof(int))
{
constexpr int __nbits = sizeof(_Tp) * __CHAR_BIT__;
if (__y >= __nbits)
{
if constexpr (is_unsigned_v<_Tp>)
return {};
else
return _Base::_S_bit_shift_right(__x, __nbits - 1);
}
}
return _Base::_S_bit_shift_right(__x, __y);
}
// }}}
};
// }}}
// _MaskImplPpc {{{
template
struct _MaskImplPpc : _MaskImplBuiltin<_Abi>
{
using _Base = _MaskImplBuiltin<_Abi>;
// _S_popcount {{{
template
_GLIBCXX_SIMD_INTRINSIC static int _S_popcount(simd_mask<_Tp, _Abi> __k)
{
const auto __kv = __as_vector(__k);
if constexpr (__have_power10vec)
{
return vec_cntm(__to_intrin(__kv), 1);
}
else if constexpr (sizeof(_Tp) >= sizeof(int))
{
using _Intrin = __intrinsic_type16_t;
const int __sum = -vec_sums(__intrin_bitcast<_Intrin>(__kv), _Intrin())[3];
return __sum / (sizeof(_Tp) / sizeof(int));
}
else
{
const auto __summed_to_int = vec_sum4s(__to_intrin(__kv), __intrinsic_type16_t());
return -vec_sums(__summed_to_int, __intrinsic_type16_t())[3];
}
}
// }}}
};
// }}}
_GLIBCXX_SIMD_END_NAMESPACE
#endif // __cplusplus >= 201703L
#endif // _GLIBCXX_EXPERIMENTAL_SIMD_PPC_H_
// vim: foldmethod=marker foldmarker={{{,}}} sw=2 noet ts=8 sts=2 tw=100
@
1.1.1.1
log
@initial import of GCC 12.3.0.
major changes in GCC 11 included:
- The default mode for C++ is now -std=gnu++17 instead of -std=gnu++14.
- When building GCC itself, the host compiler must now support C++11,
rather than C++98.
- Some short options of the gcov tool have been renamed: -i to -j and
-j to -H.
- ThreadSanitizer improvements.
- Introduce Hardware-assisted AddressSanitizer support.
- For targets that produce DWARF debugging information GCC now defaults
to DWARF version 5. This can produce up to 25% more compact debug
information compared to earlier versions.
- Many optimisations.
- The existing malloc attribute has been extended so that it can be
used to identify allocator/deallocator API pairs. A pair of new
-Wmismatched-dealloc and -Wmismatched-new-delete warnings are added.
- Other new warnings:
-Wsizeof-array-div, enabled by -Wall, warns about divisions of two
sizeof operators when the first one is applied to an array and the
divisor does not equal the size of the array element.
-Wstringop-overread, enabled by default, warns about calls to string
functions reading past the end of the arrays passed to them as
arguments.
-Wtsan, enabled by default, warns about unsupported features in
ThreadSanitizer (currently std::atomic_thread_fence).
- Enchanced warnings:
-Wfree-nonheap-object detects many more instances of calls to
deallocation functions with pointers not returned from a dynamic
memory allocation function.
-Wmaybe-uninitialized diagnoses passing pointers or references to
uninitialized memory to functions taking const-qualified arguments.
-Wuninitialized detects reads from uninitialized dynamically
allocated memory.
-Warray-parameter warns about functions with inconsistent array forms.
-Wvla-parameter warns about functions with inconsistent VLA forms.
- Several new features from the upcoming C2X revision of the ISO C
standard are supported with -std=c2x and -std=gnu2x.
- Several C++20 features have been implemented.
- The C++ front end has experimental support for some of the upcoming
C++23 draft.
- Several new C++ warnings.
- Enhanced Arm, AArch64, x86, and RISC-V CPU support.
- The implementation of how program state is tracked within
-fanalyzer has been completely rewritten with many enhancements.
see https://gcc.gnu.org/gcc-11/changes.html for a full list.
major changes in GCC 12 include:
- An ABI incompatibility between C and C++ when passing or returning
by value certain aggregates containing zero width bit-fields has
been discovered on various targets. x86-64, ARM and AArch64
will always ignore them (so there is a C ABI incompatibility
between GCC 11 and earlier with GCC 12 or later), PowerPC64 ELFv2
always take them into account (so there is a C++ ABI
incompatibility, GCC 4.4 and earlier compatible with GCC 12 or
later, incompatible with GCC 4.5 through GCC 11). RISC-V has
changed the handling of these already starting with GCC 10. As
the ABI requires, MIPS takes them into account handling function
return values so there is a C++ ABI incompatibility with GCC 4.5
through 11.
- STABS: Support for emitting the STABS debugging format is
deprecated and will be removed in the next release. All ports now
default to emit DWARF (version 2 or later) debugging info or are
obsoleted.
- Vectorization is enabled at -O2 which is now equivalent to the
original -O2 -ftree-vectorize -fvect-cost-model=very-cheap.
- GCC now supports the ShadowCallStack sanitizer.
- Support for __builtin_shufflevector compatible with the clang
language extension was added.
- Support for attribute unavailable was added.
- Support for __builtin_dynamic_object_size compatible with the
clang language extension was added.
- New warnings:
-Wbidi-chars warns about potentially misleading UTF-8
bidirectional control characters.
-Warray-compare warns about comparisons between two operands of
array type.
- Some new features from the upcoming C2X revision of the ISO C
standard are supported with -std=c2x and -std=gnu2x.
- Several C++23 features have been implemented.
- Many C++ enhancements across warnings and -f options.
see https://gcc.gnu.org/gcc-12/changes.html for a full list.
@
text
@@
1.1.1.1.2.1
log
@Sync with HEAD.
@
text
@d67 1
a67 1
if (__y >= int(sizeof(_Tp) * __CHAR_BIT__))
d127 1
a127 2
_GLIBCXX_SIMD_INTRINSIC static int
_S_popcount(simd_mask<_Tp, _Abi> __k)
d132 1
a132 2
using _Intrin = __intrinsic_type16_t>>;
return vec_cntm(reinterpret_cast<_Intrin>(__kv), 1);
@
1.1.1.2
log
@import GCC 12.4.0.
this includes at least 85 GCC PRs fixed, 2 C, 17 C++, 16 libstdc++-v3,
at least 13 target-specific (x86, arm64, riscv mostly), and at least
24 optimisation PRs.
@
text
@d67 1
a67 1
if (__y >= int(sizeof(_Tp) * __CHAR_BIT__))
d127 1
a127 2
_GLIBCXX_SIMD_INTRINSIC static int
_S_popcount(simd_mask<_Tp, _Abi> __k)
d132 1
a132 2
using _Intrin = __intrinsic_type16_t>>;
return vec_cntm(reinterpret_cast<_Intrin>(__kv), 1);
@
1.1.1.3
log
@initial import of GCC 14.3.0.
major changes in GCC 13:
- improved sanitizer
- zstd debug info compression
- LTO improvements
- SARIF based diagnostic support
- new warnings: -Wxor-used-as-pow, -Wenum-int-mismatch, -Wself-move,
-Wdangling-reference
- many new -Wanalyzer* specific warnings
- enhanced warnings: -Wpessimizing-move, -Wredundant-move
- new attributes to mark file descriptors, c++23 "assume"
- several C23 features added
- several C++23 features added
- many new features for Arm, x86, RISC-V
major changes in GCC 14:
- more strict C99 or newer support
- ia64* marked deprecated (but seemingly still in GCC 15.)
- several new hardening features
- support for "hardbool", which can have user supplied values of true/false
- explicit support for stack scrubbing upon function exit
- better auto-vectorisation support
- added clang-compatible __has_feature and __has_extension
- more C23, including -std=c23
- several C++26 features added
- better diagnostics in C++ templates
- new warnings: -Wnrvo, Welaborated-enum-base
- many new features for Arm, x86, RISC-V
- possible ABI breaking change for SPARC64 and small structures with arrays
of floats.
@
text
@d3 1
a3 1
// Copyright (C) 2020-2024 Free Software Foundation, Inc.
@