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