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 | |