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https://github.com/jart/cosmopolitan.git
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c9152b6f14
This change switches c++ exception handling from sjlj to standard dwarf. It's needed because clang for aarch64 doesn't support sjlj. It turns out that libunwind had a bare-metal configuration that made this easy to do. This change gets the new experimental cosmocc -mclang flag in a state of working so well that it can now be used to build all of llamafile and it goes 3x faster in terms of build latency, without trading away any perf. The int_fast16_t and int_fast32_t types are now always defined as 32-bit in the interest of having more abi consistency between cosmocc -mgcc and -mclang mode.
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/*===---- lzcntintrin.h - LZCNT intrinsics ---------------------------------===
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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*===-----------------------------------------------------------------------===
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*/
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#if !defined __X86INTRIN_H && !defined __IMMINTRIN_H
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#error "Never use <lzcntintrin.h> directly; include <x86intrin.h> instead."
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#endif
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#ifndef __LZCNTINTRIN_H
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#define __LZCNTINTRIN_H
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/* Define the default attributes for the functions in this file. */
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#define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("lzcnt")))
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#ifndef _MSC_VER
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/// Counts the number of leading zero bits in the operand.
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///
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/// \headerfile <x86intrin.h>
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///
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/// This intrinsic corresponds to the \c LZCNT instruction.
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///
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/// \param __X
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/// An unsigned 16-bit integer whose leading zeros are to be counted.
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/// \returns An unsigned 16-bit integer containing the number of leading zero
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/// bits in the operand.
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#define __lzcnt16(X) __builtin_ia32_lzcnt_u16((unsigned short)(X))
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#endif // _MSC_VER
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/// Counts the number of leading zero bits in the operand.
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///
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/// \headerfile <x86intrin.h>
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///
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/// This intrinsic corresponds to the \c LZCNT instruction.
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///
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/// \param __X
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/// An unsigned 32-bit integer whose leading zeros are to be counted.
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/// \returns An unsigned 32-bit integer containing the number of leading zero
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/// bits in the operand.
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/// \see _lzcnt_u32
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static __inline__ unsigned int __DEFAULT_FN_ATTRS
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__lzcnt32(unsigned int __X)
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{
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return __builtin_ia32_lzcnt_u32(__X);
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}
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/// Counts the number of leading zero bits in the operand.
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///
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/// \headerfile <x86intrin.h>
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///
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/// This intrinsic corresponds to the \c LZCNT instruction.
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///
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/// \param __X
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/// An unsigned 32-bit integer whose leading zeros are to be counted.
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/// \returns An unsigned 32-bit integer containing the number of leading zero
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/// bits in the operand.
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/// \see __lzcnt32
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static __inline__ unsigned int __DEFAULT_FN_ATTRS
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_lzcnt_u32(unsigned int __X)
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{
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return __builtin_ia32_lzcnt_u32(__X);
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}
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#ifdef __x86_64__
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#ifndef _MSC_VER
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/// Counts the number of leading zero bits in the operand.
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///
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/// \headerfile <x86intrin.h>
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///
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/// This intrinsic corresponds to the \c LZCNT instruction.
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///
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/// \param __X
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/// An unsigned 64-bit integer whose leading zeros are to be counted.
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/// \returns An unsigned 64-bit integer containing the number of leading zero
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/// bits in the operand.
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/// \see _lzcnt_u64
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#define __lzcnt64(X) __builtin_ia32_lzcnt_u64((unsigned long long)(X))
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#endif // _MSC_VER
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/// Counts the number of leading zero bits in the operand.
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///
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/// \headerfile <x86intrin.h>
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///
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/// This intrinsic corresponds to the \c LZCNT instruction.
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///
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/// \param __X
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/// An unsigned 64-bit integer whose leading zeros are to be counted.
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/// \returns An unsigned 64-bit integer containing the number of leading zero
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/// bits in the operand.
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/// \see __lzcnt64
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static __inline__ unsigned long long __DEFAULT_FN_ATTRS
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_lzcnt_u64(unsigned long long __X)
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{
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return __builtin_ia32_lzcnt_u64(__X);
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}
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#endif
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#undef __DEFAULT_FN_ATTRS
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#endif /* __LZCNTINTRIN_H */
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