Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <asm/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * hweightN - returns the hamming weight of a N-bit word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * @x: the word to weigh
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * The Hamming Weight of a number is the total number of bits set in it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) unsigned int __sw_hweight32(unsigned int w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #ifdef CONFIG_ARCH_HAS_FAST_MULTIPLIER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	w -= (w >> 1) & 0x55555555;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	w =  (w & 0x33333333) + ((w >> 2) & 0x33333333);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	w =  (w + (w >> 4)) & 0x0f0f0f0f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	return (w * 0x01010101) >> 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	unsigned int res = w - ((w >> 1) & 0x55555555);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	res = (res + (res >> 4)) & 0x0F0F0F0F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	res = res + (res >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	return (res + (res >> 16)) & 0x000000FF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) EXPORT_SYMBOL(__sw_hweight32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) unsigned int __sw_hweight16(unsigned int w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	unsigned int res = w - ((w >> 1) & 0x5555);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	res = (res & 0x3333) + ((res >> 2) & 0x3333);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	res = (res + (res >> 4)) & 0x0F0F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	return (res + (res >> 8)) & 0x00FF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) EXPORT_SYMBOL(__sw_hweight16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) unsigned int __sw_hweight8(unsigned int w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	unsigned int res = w - ((w >> 1) & 0x55);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	res = (res & 0x33) + ((res >> 2) & 0x33);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	return (res + (res >> 4)) & 0x0F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) EXPORT_SYMBOL(__sw_hweight8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) unsigned long __sw_hweight64(__u64 w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #if BITS_PER_LONG == 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	return __sw_hweight32((unsigned int)(w >> 32)) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	       __sw_hweight32((unsigned int)w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #elif BITS_PER_LONG == 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #ifdef CONFIG_ARCH_HAS_FAST_MULTIPLIER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	w -= (w >> 1) & 0x5555555555555555ul;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	w =  (w & 0x3333333333333333ul) + ((w >> 2) & 0x3333333333333333ul);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	w =  (w + (w >> 4)) & 0x0f0f0f0f0f0f0f0ful;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	return (w * 0x0101010101010101ul) >> 56;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	__u64 res = w - ((w >> 1) & 0x5555555555555555ul);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	res = (res & 0x3333333333333333ul) + ((res >> 2) & 0x3333333333333333ul);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	res = (res + (res >> 4)) & 0x0F0F0F0F0F0F0F0Ful;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	res = res + (res >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	res = res + (res >> 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	return (res + (res >> 32)) & 0x00000000000000FFul;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) EXPORT_SYMBOL(__sw_hweight64);