Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/libgcc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #define W_TYPE_SIZE 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define __ll_B ((unsigned long) 1 << (W_TYPE_SIZE / 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define __ll_lowpart(t) ((unsigned long) (t) & (__ll_B - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define __ll_highpart(t) ((unsigned long) (t) >> (W_TYPE_SIZE / 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) /* If we still don't have umul_ppmm, define it using plain C.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #if !defined(umul_ppmm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define umul_ppmm(w1, w0, u, v)						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	do {								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		unsigned long __x0, __x1, __x2, __x3;			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		unsigned short __ul, __vl, __uh, __vh;			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		__ul = __ll_lowpart(u);					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		__uh = __ll_highpart(u);				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		__vl = __ll_lowpart(v);					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		__vh = __ll_highpart(v);				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		__x0 = (unsigned long) __ul * __vl;			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		__x1 = (unsigned long) __ul * __vh;			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		__x2 = (unsigned long) __uh * __vl;			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		__x3 = (unsigned long) __uh * __vh;			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		__x1 += __ll_highpart(__x0); /* this can't give carry */\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		__x1 += __x2; /* but this indeed can */			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		if (__x1 < __x2) /* did we get it? */			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		__x3 += __ll_B; /* yes, add it in the proper pos */	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		(w1) = __x3 + __ll_highpart(__x1);			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		(w0) = __ll_lowpart(__x1) * __ll_B + __ll_lowpart(__x0);\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	} while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #if !defined(__umulsidi3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define __umulsidi3(u, v) ({				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	DWunion __w;					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	umul_ppmm(__w.s.high, __w.s.low, u, v);		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	__w.ll;						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) long long notrace __muldi3(long long u, long long v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	const DWunion uu = {.ll = u};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	const DWunion vv = {.ll = v};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	DWunion w = {.ll = __umulsidi3(uu.s.low, vv.s.low)};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	w.s.high += ((unsigned long) uu.s.low * (unsigned long) vv.s.high
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		+ (unsigned long) uu.s.high * (unsigned long) vv.s.low);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	return w.ll;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) EXPORT_SYMBOL(__muldi3);