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