riscv/lib/csum.c

5  * Influenced by arch/arm64/lib/csum.c
22 			__u32 len, __u8 proto, __wsum csum)
25 	unsigned long sum = (__force unsigned long)csum;
93 	unsigned long csum = 0, carry = 0;
101 		csum += data;
102 		carry += csum < data;
116 	csum += data;
117 	carry += csum < data;
118 	csum += carry;
119 	csum += csum < carry;
121 	return csum;
133 	unsigned long csum, data;
157 	csum = do_csum_common(ptr, end, data);
183 			rori	%[fold_temp], %[csum], 16	\n\
185 			add	%[csum], %[fold_temp], %[csum]	\n\
187 			rev8	%[csum], %[csum]		\n\
189 			: [csum] "+r" (csum), [fold_temp] "=&r" (fold_temp)
194 		return (unsigned short)csum;
198 			rori	%[fold_temp], %[csum], 32	\n\
199 			add	%[csum], %[fold_temp], %[csum]	\n\
200 			srli	%[csum], %[csum], 32		\n\
201 			roriw	%[fold_temp], %[csum], 16	\n\
202 			addw	%[csum], %[fold_temp], %[csum]	\n\
205 			rev8	%[csum], %[csum]		\n\
207 			: [csum] "+r" (csum), [fold_temp] "=&r" (fold_temp)
212 		return (csum << 16) >> 48;
215 		return csum >> 16;
220 	csum += ror64(csum, 32);
221 	csum >>= 32;
223 	csum = (u32)csum + ror32((u32)csum, 16);
225 		return (u16)swab32(csum);
226 	return csum >> 16;
236 	unsigned long csum, data;
245 	csum = do_csum_common(ptr, end, data);
270 			rori	%[fold_temp], %[csum], 16	\n\
271 			add	%[csum], %[fold_temp], %[csum]	\n\
273 			: [csum] "+r" (csum), [fold_temp] "=&r" (fold_temp)
280 			rori	%[fold_temp], %[csum], 32	\n\
281 			add	%[csum], %[fold_temp], %[csum]	\n\
282 			srli	%[csum], %[csum], 32		\n\
283 			roriw	%[fold_temp], %[csum], 16	\n\
284 			addw	%[csum], %[fold_temp], %[csum]	\n\
286 			: [csum] "+r" (csum), [fold_temp] "=&r" (fold_temp)
290 		return csum >> 16;
294 	csum += ror64(csum, 32);
295 	csum >>= 32;
297 	csum = (u32)csum + ror32((u32)csum, 16);
298 	return csum >> 16;