1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * arch/sparc64/math-emu/sfp-util.h
4  *
5  * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
6  * Copyright (C) 1999 David S. Miller (davem@redhat.com)
7  *
8  */
9 
10 #include <linux/kernel.h>
11 #include <linux/sched.h>
12 #include <linux/types.h>
13 #include <asm/byteorder.h>
14 
15 #define add_ssaaaa(sh, sl, ah, al, bh, bl) 	\
16   __asm__ ("addcc %4,%5,%1\n\t"			\
17 	   "add %2,%3,%0\n\t"			\
18   	   "bcs,a,pn %%xcc, 1f\n\t"		\
19   	   "add %0, 1, %0\n"			\
20   	   "1:"					\
21 	   : "=r" (sh),				\
22 	     "=&r" (sl)				\
23 	   : "r" ((UDItype)(ah)),		\
24 	     "r" ((UDItype)(bh)),		\
25 	     "r" ((UDItype)(al)),		\
26 	     "r" ((UDItype)(bl))		\
27 	   : "cc")
28 
29 #define sub_ddmmss(sh, sl, ah, al, bh, bl) 	\
30   __asm__ ("subcc %4,%5,%1\n\t"			\
31   	   "sub %2,%3,%0\n\t"			\
32   	   "bcs,a,pn %%xcc, 1f\n\t"		\
33   	   "sub %0, 1, %0\n"			\
34   	   "1:"					\
35 	   : "=r" (sh),				\
36 	     "=&r" (sl)				\
37 	   : "r" ((UDItype)(ah)),		\
38 	     "r" ((UDItype)(bh)),		\
39 	     "r" ((UDItype)(al)),		\
40 	     "r" ((UDItype)(bl))		\
41 	   : "cc")
42 
43 #define umul_ppmm(wh, wl, u, v)				\
44   do {							\
45 	  UDItype tmp1, tmp2, tmp3, tmp4;		\
46 	  __asm__ __volatile__ (			\
47 		   "srl %7,0,%3\n\t"			\
48 		   "mulx %3,%6,%1\n\t"			\
49 		   "srlx %6,32,%2\n\t"			\
50 		   "mulx %2,%3,%4\n\t"			\
51 		   "sllx %4,32,%5\n\t"			\
52 		   "srl %6,0,%3\n\t"			\
53 		   "sub %1,%5,%5\n\t"			\
54 		   "srlx %5,32,%5\n\t"			\
55 		   "addcc %4,%5,%4\n\t"			\
56 		   "srlx %7,32,%5\n\t"			\
57 		   "mulx %3,%5,%3\n\t"			\
58 		   "mulx %2,%5,%5\n\t"			\
59 		   "sethi %%hi(0x80000000),%2\n\t"	\
60 		   "addcc %4,%3,%4\n\t"			\
61 		   "srlx %4,32,%4\n\t"			\
62 		   "add %2,%2,%2\n\t"			\
63 		   "movcc %%xcc,%%g0,%2\n\t"		\
64 		   "addcc %5,%4,%5\n\t"			\
65 		   "sllx %3,32,%3\n\t"			\
66 		   "add %1,%3,%1\n\t"			\
67 		   "add %5,%2,%0"			\
68 	   : "=r" (wh),					\
69 	     "=&r" (wl),				\
70 	     "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4) \
71 	   : "r" ((UDItype)(u)),			\
72 	     "r" ((UDItype)(v))				\
73 	   : "cc");					\
74   } while (0)
75 
76 #define udiv_qrnnd(q, r, n1, n0, d) 			\
77   do {                                                  \
78     UWtype __d1, __d0, __q1, __q0, __r1, __r0, __m;     \
79     __d1 = (d >> 32);                                   \
80     __d0 = (USItype)d;                                  \
81                                                         \
82     __r1 = (n1) % __d1;                                 \
83     __q1 = (n1) / __d1;                                 \
84     __m = (UWtype) __q1 * __d0;                         \
85     __r1 = (__r1 << 32) | (n0 >> 32);                   \
86     if (__r1 < __m)                                     \
87       {                                                 \
88         __q1--, __r1 += (d);                            \
89         if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */ \
90           if (__r1 < __m)                               \
91             __q1--, __r1 += (d);                        \
92       }                                                 \
93     __r1 -= __m;                                        \
94                                                         \
95     __r0 = __r1 % __d1;                                 \
96     __q0 = __r1 / __d1;                                 \
97     __m = (UWtype) __q0 * __d0;                         \
98     __r0 = (__r0 << 32) | ((USItype)n0);                \
99     if (__r0 < __m)                                     \
100       {                                                 \
101         __q0--, __r0 += (d);                            \
102         if (__r0 >= (d))                                \
103           if (__r0 < __m)                               \
104             __q0--, __r0 += (d);                        \
105       }                                                 \
106     __r0 -= __m;                                        \
107                                                         \
108     (q) = (UWtype) (__q1 << 32)  | __q0;                \
109     (r) = __r0;                                         \
110   } while (0)
111 
112 #define UDIV_NEEDS_NORMALIZATION 1
113 
114 #define abort() \
115 	return 0
116 
117 #ifdef __BIG_ENDIAN
118 #define __BYTE_ORDER __BIG_ENDIAN
119 #else
120 #define __BYTE_ORDER __LITTLE_ENDIAN
121 #endif
122