34 /* __jhash_mix -- mix 3 32-bit values reversibly. */
35 #define __jhash_mix(a, b, c)			\  argument
37 	a -= c;  a ^= rol32(c, 4);  c += b;	\
38 	b -= a;  b ^= rol32(a, 6);  a += c;	\
39 	c -= b;  c ^= rol32(b, 8);  b += a;	\
40 	a -= c;  a ^= rol32(c, 16); c += b;	\
41 	b -= a;  b ^= rol32(a, 19); a += c;	\
42 	c -= b;  c ^= rol32(b, 4);  b += a;	\
45 /* __jhash_final - final mixing of 3 32-bit values (a,b,c) into c */
46 #define __jhash_final(a, b, c)			\  argument
48 	c ^= b; c -= rol32(b, 14);		\
50 	b ^= a; b -= rol32(a, 25);		\
51 	c ^= b; c -= rol32(b, 16);		\
53 	b ^= a; b -= rol32(a, 14);		\
54 	c ^= b; c -= rol32(b, 24);		\
72 	u32 a, b, c;  in jhash()  local
76 	a = b = c = JHASH_INITVAL + length + initval;  in jhash()
78 	/* All but the last block: affect some 32 bits of (a,b,c) */  in jhash()
81 		b += __get_unaligned_cpu32(k + 4);  in jhash()
83 		__jhash_mix(a, b, c);  in jhash()
94 	case 8:  b += (u32)k[7]<<24;  in jhash()
95 	case 7:  b += (u32)k[6]<<16;  in jhash()
96 	case 6:  b += (u32)k[5]<<8;  in jhash()
97 	case 5:  b += k[4];  in jhash()
98 	case 4:  a += (u32)k[3]<<24;  in jhash()
99 	case 3:  a += (u32)k[2]<<16;  in jhash()
102 		 __jhash_final(a, b, c);  in jhash()
119 	u32 a, b, c;  in jhash2()  local
122 	a = b = c = JHASH_INITVAL + (length<<2) + initval;  in jhash2()
125 	while (length > 3) {  in jhash2()
127 		b += k[1];  in jhash2()
129 		__jhash_mix(a, b, c);  in jhash2()
130 		length -= 3;  in jhash2()
131 		k += 3;  in jhash2()
134 	/* Handle the last 3 u32's: all the case statements fall through */  in jhash2()
136 	case 3: c += k[2];  in jhash2()
137 	case 2: b += k[1];  in jhash2()
139 		__jhash_final(a, b, c);  in jhash2()
148 /* __jhash_nwords - hash exactly 3, 2 or 1 word(s) */
149 static inline u32 __jhash_nwords(u32 a, u32 b, u32 c, u32 initval)  in __jhash_nwords()  argument
152 	b += initval;  in __jhash_nwords()
155 	__jhash_final(a, b, c);  in __jhash_nwords()
160 static inline u32 jhash_3words(u32 a, u32 b, u32 c, u32 initval)  in jhash_3words()  argument
162 	return __jhash_nwords(a, b, c, initval + JHASH_INITVAL + (3 << 2));  in jhash_3words()
165 static inline u32 jhash_2words(u32 a, u32 b, u32 initval)  in jhash_2words()  argument
167 	return __jhash_nwords(a, b, 0, initval + JHASH_INITVAL + (2 << 2));  in jhash_2words()