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383 lines
13 KiB
C
383 lines
13 KiB
C
/*===---- bmiintrin.h - BMI intrinsics -------------------------------------===
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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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 <bmiintrin.h> directly; include <x86intrin.h> instead."
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#endif
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#ifndef __BMIINTRIN_H
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#define __BMIINTRIN_H
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#define _tzcnt_u16(a) (__tzcnt_u16((a)))
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#define _andn_u32(a, b) (__andn_u32((a), (b)))
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/* _bextr_u32 != __bextr_u32 */
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#define _blsi_u32(a) (__blsi_u32((a)))
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#define _blsmsk_u32(a) (__blsmsk_u32((a)))
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#define _blsr_u32(a) (__blsr_u32((a)))
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#define _tzcnt_u32(a) (__tzcnt_u32((a)))
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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__("bmi")))
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/* Allow using the tzcnt intrinsics even for non-BMI targets. Since the TZCNT
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instruction behaves as BSF on non-BMI targets, there is code that expects
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to use it as a potentially faster version of BSF. */
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#define __RELAXED_FN_ATTRS __attribute__((__always_inline__, __nodebug__))
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/// \brief Counts the number of trailing 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> TZCNT </c> instruction.
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///
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/// \param __X
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/// An unsigned 16-bit integer whose trailing zeros are to be counted.
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/// \returns An unsigned 16-bit integer containing the number of trailing zero
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/// bits in the operand.
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static __inline__ unsigned short __RELAXED_FN_ATTRS
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__tzcnt_u16(unsigned short __X)
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{
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return __X ? __builtin_ctzs(__X) : 16;
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}
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/// \brief Performs a bitwise AND of the second operand with the one's
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/// complement of the first 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> ANDN </c> instruction.
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///
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/// \param __X
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/// An unsigned integer containing one of the operands.
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/// \param __Y
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/// An unsigned integer containing one of the operands.
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/// \returns An unsigned integer containing the bitwise AND of the second
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/// operand with the one's complement of the first operand.
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static __inline__ unsigned int __DEFAULT_FN_ATTRS
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__andn_u32(unsigned int __X, unsigned int __Y)
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{
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return ~__X & __Y;
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}
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/* AMD-specified, double-leading-underscore version of BEXTR */
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/// \brief Extracts the specified bits from the first operand and returns them
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/// in the least significant bits of the result.
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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> BEXTR </c> instruction.
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///
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/// \param __X
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/// An unsigned integer whose bits are to be extracted.
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/// \param __Y
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/// An unsigned integer used to specify which bits are extracted. Bits [7:0]
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/// specify the index of the least significant bit. Bits [15:8] specify the
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/// number of bits to be extracted.
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/// \returns An unsigned integer whose least significant bits contain the
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/// extracted bits.
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static __inline__ unsigned int __DEFAULT_FN_ATTRS
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__bextr_u32(unsigned int __X, unsigned int __Y)
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{
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return __builtin_ia32_bextr_u32(__X, __Y);
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}
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/* Intel-specified, single-leading-underscore version of BEXTR */
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/// \brief Extracts the specified bits from the first operand and returns them
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/// in the least significant bits of the result.
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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> BEXTR </c> instruction.
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///
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/// \param __X
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/// An unsigned integer whose bits are to be extracted.
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/// \param __Y
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/// An unsigned integer used to specify the index of the least significant
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/// bit for the bits to be extracted. Bits [7:0] specify the index.
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/// \param __Z
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/// An unsigned integer used to specify the number of bits to be extracted.
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/// Bits [7:0] specify the number of bits.
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/// \returns An unsigned integer whose least significant bits contain the
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/// extracted bits.
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static __inline__ unsigned int __DEFAULT_FN_ATTRS
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_bextr_u32(unsigned int __X, unsigned int __Y, unsigned int __Z)
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{
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return __builtin_ia32_bextr_u32 (__X, ((__Y & 0xff) | ((__Z & 0xff) << 8)));
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}
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/// \brief Clears all bits in the source except for the least significant bit
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/// containing a value of 1 and returns the result.
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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> BLSI </c> instruction.
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///
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/// \param __X
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/// An unsigned integer whose bits are to be cleared.
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/// \returns An unsigned integer containing the result of clearing the bits from
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/// the source operand.
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static __inline__ unsigned int __DEFAULT_FN_ATTRS
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__blsi_u32(unsigned int __X)
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{
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return __X & -__X;
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}
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/// \brief Creates a mask whose bits are set to 1, using bit 0 up to and
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/// including the least significant bit that is set to 1 in the source
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/// operand and returns the result.
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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> BLSMSK </c> instruction.
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///
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/// \param __X
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/// An unsigned integer used to create the mask.
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/// \returns An unsigned integer containing the newly created mask.
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static __inline__ unsigned int __DEFAULT_FN_ATTRS
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__blsmsk_u32(unsigned int __X)
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{
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return __X ^ (__X - 1);
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}
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/// \brief Clears the least significant bit that is set to 1 in the source
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/// operand and returns the result.
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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> BLSR </c> instruction.
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///
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/// \param __X
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/// An unsigned integer containing the operand to be cleared.
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/// \returns An unsigned integer containing the result of clearing the source
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/// operand.
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static __inline__ unsigned int __DEFAULT_FN_ATTRS
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__blsr_u32(unsigned int __X)
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{
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return __X & (__X - 1);
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}
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/// \brief Counts the number of trailing 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> TZCNT </c> instruction.
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///
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/// \param __X
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/// An unsigned 32-bit integer whose trailing zeros are to be counted.
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/// \returns An unsigned 32-bit integer containing the number of trailing zero
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/// bits in the operand.
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static __inline__ unsigned int __RELAXED_FN_ATTRS
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__tzcnt_u32(unsigned int __X)
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{
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return __X ? __builtin_ctz(__X) : 32;
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}
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/// \brief Counts the number of trailing 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> TZCNT </c> instruction.
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///
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/// \param __X
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/// An unsigned 32-bit integer whose trailing zeros are to be counted.
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/// \returns An 32-bit integer containing the number of trailing zero bits in
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/// the operand.
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static __inline__ int __RELAXED_FN_ATTRS
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_mm_tzcnt_32(unsigned int __X)
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{
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return __X ? __builtin_ctz(__X) : 32;
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}
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#ifdef __x86_64__
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#define _andn_u64(a, b) (__andn_u64((a), (b)))
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/* _bextr_u64 != __bextr_u64 */
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#define _blsi_u64(a) (__blsi_u64((a)))
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#define _blsmsk_u64(a) (__blsmsk_u64((a)))
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#define _blsr_u64(a) (__blsr_u64((a)))
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#define _tzcnt_u64(a) (__tzcnt_u64((a)))
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/// \brief Performs a bitwise AND of the second operand with the one's
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/// complement of the first 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> ANDN </c> instruction.
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///
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/// \param __X
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/// An unsigned 64-bit integer containing one of the operands.
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/// \param __Y
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/// An unsigned 64-bit integer containing one of the operands.
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/// \returns An unsigned 64-bit integer containing the bitwise AND of the second
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/// operand with the one's complement of the first operand.
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static __inline__ unsigned long long __DEFAULT_FN_ATTRS
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__andn_u64 (unsigned long long __X, unsigned long long __Y)
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{
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return ~__X & __Y;
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}
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/* AMD-specified, double-leading-underscore version of BEXTR */
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/// \brief Extracts the specified bits from the first operand and returns them
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/// in the least significant bits of the result.
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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> BEXTR </c> instruction.
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///
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/// \param __X
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/// An unsigned 64-bit integer whose bits are to be extracted.
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/// \param __Y
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/// An unsigned 64-bit integer used to specify which bits are extracted. Bits
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/// [7:0] specify the index of the least significant bit. Bits [15:8] specify
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/// the number of bits to be extracted.
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/// \returns An unsigned 64-bit integer whose least significant bits contain the
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/// extracted bits.
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static __inline__ unsigned long long __DEFAULT_FN_ATTRS
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__bextr_u64(unsigned long long __X, unsigned long long __Y)
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{
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return __builtin_ia32_bextr_u64(__X, __Y);
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}
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/* Intel-specified, single-leading-underscore version of BEXTR */
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/// \brief Extracts the specified bits from the first operand and returns them
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/// in the least significant bits of the result.
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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> BEXTR </c> instruction.
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///
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/// \param __X
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/// An unsigned 64-bit integer whose bits are to be extracted.
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/// \param __Y
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/// An unsigned integer used to specify the index of the least significant
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/// bit for the bits to be extracted. Bits [7:0] specify the index.
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/// \param __Z
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/// An unsigned integer used to specify the number of bits to be extracted.
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/// Bits [7:0] specify the number of bits.
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/// \returns An unsigned 64-bit integer whose least significant bits contain the
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/// extracted bits.
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static __inline__ unsigned long long __DEFAULT_FN_ATTRS
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_bextr_u64(unsigned long long __X, unsigned int __Y, unsigned int __Z)
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{
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return __builtin_ia32_bextr_u64 (__X, ((__Y & 0xff) | ((__Z & 0xff) << 8)));
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}
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/// \brief Clears all bits in the source except for the least significant bit
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/// containing a value of 1 and returns the result.
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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> BLSI </c> instruction.
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///
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/// \param __X
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/// An unsigned 64-bit integer whose bits are to be cleared.
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/// \returns An unsigned 64-bit integer containing the result of clearing the
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/// bits from the source operand.
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static __inline__ unsigned long long __DEFAULT_FN_ATTRS
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__blsi_u64(unsigned long long __X)
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{
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return __X & -__X;
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}
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/// \brief Creates a mask whose bits are set to 1, using bit 0 up to and
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/// including the least significant bit that is set to 1 in the source
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/// operand and returns the result.
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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> BLSMSK </c> instruction.
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///
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/// \param __X
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/// An unsigned 64-bit integer used to create the mask.
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/// \returns An unsigned 64-bit integer containing the newly created mask.
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static __inline__ unsigned long long __DEFAULT_FN_ATTRS
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__blsmsk_u64(unsigned long long __X)
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{
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return __X ^ (__X - 1);
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}
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/// \brief Clears the least significant bit that is set to 1 in the source
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/// operand and returns the result.
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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> BLSR </c> instruction.
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///
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/// \param __X
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/// An unsigned 64-bit integer containing the operand to be cleared.
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/// \returns An unsigned 64-bit integer containing the result of clearing the
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/// source operand.
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static __inline__ unsigned long long __DEFAULT_FN_ATTRS
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__blsr_u64(unsigned long long __X)
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{
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return __X & (__X - 1);
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}
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/// \brief Counts the number of trailing 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> TZCNT </c> instruction.
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///
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/// \param __X
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/// An unsigned 64-bit integer whose trailing zeros are to be counted.
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/// \returns An unsigned 64-bit integer containing the number of trailing zero
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/// bits in the operand.
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static __inline__ unsigned long long __RELAXED_FN_ATTRS
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__tzcnt_u64(unsigned long long __X)
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{
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return __X ? __builtin_ctzll(__X) : 64;
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}
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/// \brief Counts the number of trailing 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> TZCNT </c> instruction.
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///
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/// \param __X
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/// An unsigned 64-bit integer whose trailing zeros are to be counted.
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/// \returns An 64-bit integer containing the number of trailing zero bits in
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/// the operand.
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static __inline__ long long __RELAXED_FN_ATTRS
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_mm_tzcnt_64(unsigned long long __X)
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{
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return __X ? __builtin_ctzll(__X) : 64;
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}
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#endif /* __x86_64__ */
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#undef __DEFAULT_FN_ATTRS
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#undef __RELAXED_FN_ATTRS
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#endif /* __BMIINTRIN_H */
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