365 lines
10 KiB
C
365 lines
10 KiB
C
/* ===-------- ia32intrin.h ---------------------------------------------------===
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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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#ifndef __X86INTRIN_H
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#error "Never use <ia32intrin.h> directly; include <x86intrin.h> instead."
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#endif
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#ifndef __IA32INTRIN_H
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#define __IA32INTRIN_H
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/** Find the first set bit starting from the lsb. Result is undefined if
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* input is 0.
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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> BSF </c> instruction or the
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* <c> TZCNT </c> instruction.
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*
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* \param __A
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* A 32-bit integer operand.
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* \returns A 32-bit integer containing the bit number.
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*/
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static __inline__ int __attribute__((__always_inline__, __nodebug__))
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__bsfd(int __A) {
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return __builtin_ctz(__A);
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}
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/** Find the first set bit starting from the msb. Result is undefined if
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* input is 0.
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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> BSR </c> instruction or the
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* <c> LZCNT </c> instruction and an <c> XOR </c>.
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*
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* \param __A
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* A 32-bit integer operand.
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* \returns A 32-bit integer containing the bit number.
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*/
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static __inline__ int __attribute__((__always_inline__, __nodebug__))
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__bsrd(int __A) {
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return 31 - __builtin_clz(__A);
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}
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/** Swaps the bytes in the input. Converting little endian to big endian or
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* vice versa.
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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> BSWAP </c> instruction.
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*
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* \param __A
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* A 32-bit integer operand.
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* \returns A 32-bit integer containing the swapped bytes.
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*/
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static __inline__ int __attribute__((__always_inline__, __nodebug__))
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__bswapd(int __A) {
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return __builtin_bswap32(__A);
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}
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static __inline__ int __attribute__((__always_inline__, __nodebug__))
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_bswap(int __A) {
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return __builtin_bswap32(__A);
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}
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#define _bit_scan_forward(A) __bsfd((A))
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#define _bit_scan_reverse(A) __bsrd((A))
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#ifdef __x86_64__
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/** Find the first set bit starting from the lsb. Result is undefined if
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* input is 0.
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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> BSF </c> instruction or the
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* <c> TZCNT </c> instruction.
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*
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* \param __A
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* A 64-bit integer operand.
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* \returns A 32-bit integer containing the bit number.
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*/
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static __inline__ int __attribute__((__always_inline__, __nodebug__))
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__bsfq(long long __A) {
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return __builtin_ctzll(__A);
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}
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/** Find the first set bit starting from the msb. Result is undefined if
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* input is 0.
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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> BSR </c> instruction or the
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* <c> LZCNT </c> instruction and an <c> XOR </c>.
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*
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* \param __A
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* A 64-bit integer operand.
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* \returns A 32-bit integer containing the bit number.
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*/
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static __inline__ int __attribute__((__always_inline__, __nodebug__))
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__bsrq(long long __A) {
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return 63 - __builtin_clzll(__A);
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}
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/** Swaps the bytes in the input. Converting little endian to big endian or
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* vice versa.
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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> BSWAP </c> instruction.
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*
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* \param __A
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* A 64-bit integer operand.
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* \returns A 64-bit integer containing the swapped bytes.
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*/
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static __inline__ long long __attribute__((__always_inline__, __nodebug__))
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__bswapq(long long __A) {
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return __builtin_bswap64(__A);
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}
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#define _bswap64(A) __bswapq((A))
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#endif
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/** Counts the number of bits in the source operand having a value of 1.
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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> POPCNT </c> instruction or a
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* a sequence of arithmetic and logic ops to calculate it.
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*
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* \param __A
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* An unsigned 32-bit integer operand.
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* \returns A 32-bit integer containing the number of bits with value 1 in the
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* source operand.
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*/
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static __inline__ int __attribute__((__always_inline__, __nodebug__))
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__popcntd(unsigned int __A)
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{
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return __builtin_popcount(__A);
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}
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#define _popcnt32(A) __popcntd((A))
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#ifdef __x86_64__
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/** Counts the number of bits in the source operand having a value of 1.
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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> POPCNT </c> instruction or a
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* a sequence of arithmetic and logic ops to calculate it.
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*
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* \param __A
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* An unsigned 64-bit integer operand.
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* \returns A 64-bit integer containing the number of bits with value 1 in the
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* source operand.
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*/
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static __inline__ long long __attribute__((__always_inline__, __nodebug__))
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__popcntq(unsigned long long __A)
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{
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return __builtin_popcountll(__A);
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}
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#define _popcnt64(A) __popcntq((A))
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#endif /* __x86_64__ */
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#ifdef __x86_64__
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static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__))
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__readeflags(void)
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{
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return __builtin_ia32_readeflags_u64();
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}
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static __inline__ void __attribute__((__always_inline__, __nodebug__))
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__writeeflags(unsigned long long __f)
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{
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__builtin_ia32_writeeflags_u64(__f);
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}
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#else /* !__x86_64__ */
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static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__))
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__readeflags(void)
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{
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return __builtin_ia32_readeflags_u32();
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}
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static __inline__ void __attribute__((__always_inline__, __nodebug__))
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__writeeflags(unsigned int __f)
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{
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__builtin_ia32_writeeflags_u32(__f);
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}
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#endif /* !__x86_64__ */
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/** Adds the unsigned integer operand to the CRC-32C checksum of the
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* unsigned char 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> CRC32B </c> instruction.
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*
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* \param __C
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* An unsigned integer operand to add to the CRC-32C checksum of operand
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* \a __D.
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* \param __D
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* An unsigned 8-bit integer operand used to compute the CRC-32C checksum.
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* \returns The result of adding operand \a __C to the CRC-32C checksum of
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* operand \a __D.
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*/
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static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__, __target__("sse4.2")))
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__crc32b(unsigned int __C, unsigned char __D)
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{
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return __builtin_ia32_crc32qi(__C, __D);
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}
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/** Adds the unsigned integer operand to the CRC-32C checksum of the
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* unsigned short 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> CRC32W </c> instruction.
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*
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* \param __C
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* An unsigned integer operand to add to the CRC-32C checksum of operand
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* \a __D.
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* \param __D
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* An unsigned 16-bit integer operand used to compute the CRC-32C checksum.
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* \returns The result of adding operand \a __C to the CRC-32C checksum of
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* operand \a __D.
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*/
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static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__, __target__("sse4.2")))
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__crc32w(unsigned int __C, unsigned short __D)
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{
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return __builtin_ia32_crc32hi(__C, __D);
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}
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/** Adds the unsigned integer operand to the CRC-32C checksum of the
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* second unsigned integer 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> CRC32D </c> instruction.
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*
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* \param __C
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* An unsigned integer operand to add to the CRC-32C checksum of operand
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* \a __D.
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* \param __D
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* An unsigned 32-bit integer operand used to compute the CRC-32C checksum.
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* \returns The result of adding operand \a __C to the CRC-32C checksum of
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* operand \a __D.
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*/
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static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__, __target__("sse4.2")))
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__crc32d(unsigned int __C, unsigned int __D)
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{
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return __builtin_ia32_crc32si(__C, __D);
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}
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#ifdef __x86_64__
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/** Adds the unsigned integer operand to the CRC-32C checksum of the
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* unsigned 64-bit integer 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> CRC32Q </c> instruction.
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*
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* \param __C
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* An unsigned integer operand to add to the CRC-32C checksum of operand
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* \a __D.
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* \param __D
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* An unsigned 64-bit integer operand used to compute the CRC-32C checksum.
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* \returns The result of adding operand \a __C to the CRC-32C checksum of
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* operand \a __D.
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*/
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static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__, __target__("sse4.2")))
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__crc32q(unsigned long long __C, unsigned long long __D)
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{
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return __builtin_ia32_crc32di(__C, __D);
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}
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#endif /* __x86_64__ */
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static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__))
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__rdpmc(int __A) {
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return __builtin_ia32_rdpmc(__A);
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}
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/* __rdtscp */
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static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__))
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__rdtscp(unsigned int *__A) {
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return __builtin_ia32_rdtscp(__A);
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}
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#define _rdtsc() __rdtsc()
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#define _rdpmc(A) __rdpmc(A)
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static __inline__ void __attribute__((__always_inline__, __nodebug__))
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_wbinvd(void) {
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__builtin_ia32_wbinvd();
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}
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static __inline__ unsigned char __attribute__((__always_inline__, __nodebug__))
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__rolb(unsigned char __X, int __C) {
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return __builtin_rotateleft8(__X, __C);
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}
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static __inline__ unsigned char __attribute__((__always_inline__, __nodebug__))
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__rorb(unsigned char __X, int __C) {
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return __builtin_rotateright8(__X, __C);
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}
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static __inline__ unsigned short __attribute__((__always_inline__, __nodebug__))
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__rolw(unsigned short __X, int __C) {
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return __builtin_rotateleft16(__X, __C);
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}
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static __inline__ unsigned short __attribute__((__always_inline__, __nodebug__))
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__rorw(unsigned short __X, int __C) {
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return __builtin_rotateright16(__X, __C);
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}
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static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__))
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__rold(unsigned int __X, int __C) {
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return __builtin_rotateleft32(__X, __C);
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}
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static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__))
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__rord(unsigned int __X, int __C) {
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return __builtin_rotateright32(__X, __C);
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}
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#ifdef __x86_64__
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static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__))
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__rolq(unsigned long long __X, int __C) {
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return __builtin_rotateleft64(__X, __C);
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}
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static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__))
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__rorq(unsigned long long __X, int __C) {
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return __builtin_rotateright64(__X, __C);
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}
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#endif /* __x86_64__ */
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#ifndef _MSC_VER
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/* These are already provided as builtins for MSVC. */
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/* Select the correct function based on the size of long. */
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#ifdef __LP64__
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#define _lrotl(a,b) __rolq((a), (b))
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#define _lrotr(a,b) __rorq((a), (b))
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#else
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#define _lrotl(a,b) __rold((a), (b))
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#define _lrotr(a,b) __rord((a), (b))
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#endif
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#define _rotl(a,b) __rold((a), (b))
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#define _rotr(a,b) __rord((a), (b))
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#endif // _MSC_VER
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/* These are not builtins so need to be provided in all modes. */
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#define _rotwl(a,b) __rolw((a), (b))
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#define _rotwr(a,b) __rorw((a), (b))
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#endif /* __IA32INTRIN_H */
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