Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * IEEE754 floating point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * double precision internal header file
^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)  * MIPS floating point support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Copyright (C) 1994-2000 Algorithmics Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "ieee754int.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define assert(expr) ((void)0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define DP_EBIAS	1023
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define DP_EMIN		(-1022)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define DP_EMAX		1023
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define DP_FBITS	52
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define DP_MBITS	52
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define DP_MBIT(x)	((u64)1 << (x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define DP_HIDDEN_BIT	DP_MBIT(DP_FBITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define DP_SIGN_BIT	DP_MBIT(63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define DPSIGN(dp)	(dp.sign)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define DPBEXP(dp)	(dp.bexp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define DPMANT(dp)	(dp.mant)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static inline int ieee754dp_finite(union ieee754dp x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	return DPBEXP(x) != DP_EMAX + 1 + DP_EBIAS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) /* 3bit extended double precision sticky right shift */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define XDPSRS(v,rs)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	((rs > (DP_FBITS+3))?1:((v) >> (rs)) | ((v) << (64-(rs)) != 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define XDPSRSX1() \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	(xe++, (xm = (xm >> 1) | (xm & 1)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define XDPSRS1(v)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	(((v) >> 1) | ((v) & 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /* 32bit * 32bit => 64bit unsigned integer multiplication */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define DPXMULT(x, y)	((u64)(x) * (u64)y)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* convert denormal to normalized with extended exponent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define DPDNORMx(m,e) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	while ((m >> DP_FBITS) == 0) { m <<= 1; e--; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define DPDNORMX	DPDNORMx(xm, xe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define DPDNORMY	DPDNORMx(ym, ye)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define DPDNORMZ	DPDNORMx(zm, ze)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static inline union ieee754dp builddp(int s, int bx, u64 m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	union ieee754dp r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	assert((s) == 0 || (s) == 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	assert((bx) >= DP_EMIN - 1 + DP_EBIAS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	       && (bx) <= DP_EMAX + 1 + DP_EBIAS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	assert(((m) >> DP_FBITS) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	r.sign = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	r.bexp = bx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	r.mant = m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) extern union ieee754dp __cold ieee754dp_nanxcpt(union ieee754dp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) extern union ieee754dp ieee754dp_format(int, int, u64);