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1da177e4 LT |
1 | /* Machine-dependent software floating-point definitions. |
2 | Sparc userland (_Q_*) version. | |
3 | Copyright (C) 1997,1998,1999 Free Software Foundation, Inc. | |
4 | This file is part of the GNU C Library. | |
5 | Contributed by Richard Henderson (rth@cygnus.com), | |
6 | Jakub Jelinek (jj@ultra.linux.cz), | |
7 | David S. Miller (davem@redhat.com) and | |
8 | Peter Maydell (pmaydell@chiark.greenend.org.uk). | |
9 | ||
10 | The GNU C Library is free software; you can redistribute it and/or | |
11 | modify it under the terms of the GNU Library General Public License as | |
12 | published by the Free Software Foundation; either version 2 of the | |
13 | License, or (at your option) any later version. | |
14 | ||
15 | The GNU C Library is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | Library General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU Library General Public | |
21 | License along with the GNU C Library; see the file COPYING.LIB. If | |
22 | not, write to the Free Software Foundation, Inc., | |
23 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
24 | ||
25 | #ifndef _SFP_MACHINE_H | |
26 | #define _SFP_MACHINE_H | |
27 | ||
1da177e4 LT |
28 | |
29 | #define _FP_W_TYPE_SIZE 32 | |
30 | #define _FP_W_TYPE unsigned long | |
31 | #define _FP_WS_TYPE signed long | |
32 | #define _FP_I_TYPE long | |
33 | ||
34 | #define _FP_MUL_MEAT_S(R,X,Y) \ | |
35 | _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm) | |
36 | #define _FP_MUL_MEAT_D(R,X,Y) \ | |
37 | _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) | |
38 | #define _FP_MUL_MEAT_Q(R,X,Y) \ | |
39 | _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) | |
40 | ||
41 | #define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_udiv(S,R,X,Y) | |
42 | #define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_2_udiv(D,R,X,Y) | |
43 | #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_4_udiv(Q,R,X,Y) | |
44 | ||
45 | #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) | |
46 | #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1), -1 | |
47 | #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1 | |
48 | #define _FP_NANSIGN_S 0 | |
49 | #define _FP_NANSIGN_D 0 | |
50 | #define _FP_NANSIGN_Q 0 | |
51 | ||
52 | #define _FP_KEEPNANFRACP 1 | |
53 | ||
54 | /* If one NaN is signaling and the other is not, | |
55 | * we choose that one, otherwise we choose X. | |
56 | */ | |
57 | /* For _Qp_* and _Q_*, this should prefer X, for | |
58 | * CPU instruction emulation this should prefer Y. | |
59 | * (see SPAMv9 B.2.2 section). | |
60 | */ | |
61 | #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ | |
62 | do { \ | |
63 | if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \ | |
64 | && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \ | |
65 | { \ | |
66 | R##_s = X##_s; \ | |
67 | _FP_FRAC_COPY_##wc(R,X); \ | |
68 | } \ | |
69 | else \ | |
70 | { \ | |
71 | R##_s = Y##_s; \ | |
72 | _FP_FRAC_COPY_##wc(R,Y); \ | |
73 | } \ | |
74 | R##_c = FP_CLS_NAN; \ | |
75 | } while (0) | |
76 | ||
77 | /* Some assembly to speed things up. */ | |
78 | #define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) \ | |
79 | __asm__ ("addcc %r7,%8,%2\n\t" \ | |
80 | "addxcc %r5,%6,%1\n\t" \ | |
81 | "addx %r3,%4,%0\n" \ | |
82 | : "=r" ((USItype)(r2)), \ | |
83 | "=&r" ((USItype)(r1)), \ | |
84 | "=&r" ((USItype)(r0)) \ | |
85 | : "%rJ" ((USItype)(x2)), \ | |
86 | "rI" ((USItype)(y2)), \ | |
87 | "%rJ" ((USItype)(x1)), \ | |
88 | "rI" ((USItype)(y1)), \ | |
89 | "%rJ" ((USItype)(x0)), \ | |
90 | "rI" ((USItype)(y0)) \ | |
91 | : "cc") | |
92 | ||
93 | #define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) \ | |
94 | __asm__ ("subcc %r7,%8,%2\n\t" \ | |
95 | "subxcc %r5,%6,%1\n\t" \ | |
96 | "subx %r3,%4,%0\n" \ | |
97 | : "=r" ((USItype)(r2)), \ | |
98 | "=&r" ((USItype)(r1)), \ | |
99 | "=&r" ((USItype)(r0)) \ | |
100 | : "%rJ" ((USItype)(x2)), \ | |
101 | "rI" ((USItype)(y2)), \ | |
102 | "%rJ" ((USItype)(x1)), \ | |
103 | "rI" ((USItype)(y1)), \ | |
104 | "%rJ" ((USItype)(x0)), \ | |
105 | "rI" ((USItype)(y0)) \ | |
106 | : "cc") | |
107 | ||
108 | #define __FP_FRAC_ADD_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0) \ | |
109 | do { \ | |
110 | /* We need to fool gcc, as we need to pass more than 10 \ | |
111 | input/outputs. */ \ | |
112 | register USItype _t1 __asm__ ("g1"), _t2 __asm__ ("g2"); \ | |
113 | __asm__ __volatile__ ( \ | |
114 | "addcc %r8,%9,%1\n\t" \ | |
115 | "addxcc %r6,%7,%0\n\t" \ | |
116 | "addxcc %r4,%5,%%g2\n\t" \ | |
117 | "addx %r2,%3,%%g1\n\t" \ | |
118 | : "=&r" ((USItype)(r1)), \ | |
119 | "=&r" ((USItype)(r0)) \ | |
120 | : "%rJ" ((USItype)(x3)), \ | |
121 | "rI" ((USItype)(y3)), \ | |
122 | "%rJ" ((USItype)(x2)), \ | |
123 | "rI" ((USItype)(y2)), \ | |
124 | "%rJ" ((USItype)(x1)), \ | |
125 | "rI" ((USItype)(y1)), \ | |
126 | "%rJ" ((USItype)(x0)), \ | |
127 | "rI" ((USItype)(y0)) \ | |
128 | : "cc", "g1", "g2"); \ | |
129 | __asm__ __volatile__ ("" : "=r" (_t1), "=r" (_t2)); \ | |
130 | r3 = _t1; r2 = _t2; \ | |
131 | } while (0) | |
132 | ||
133 | #define __FP_FRAC_SUB_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0) \ | |
134 | do { \ | |
135 | /* We need to fool gcc, as we need to pass more than 10 \ | |
136 | input/outputs. */ \ | |
137 | register USItype _t1 __asm__ ("g1"), _t2 __asm__ ("g2"); \ | |
138 | __asm__ __volatile__ ( \ | |
139 | "subcc %r8,%9,%1\n\t" \ | |
140 | "subxcc %r6,%7,%0\n\t" \ | |
141 | "subxcc %r4,%5,%%g2\n\t" \ | |
142 | "subx %r2,%3,%%g1\n\t" \ | |
143 | : "=&r" ((USItype)(r1)), \ | |
144 | "=&r" ((USItype)(r0)) \ | |
145 | : "%rJ" ((USItype)(x3)), \ | |
146 | "rI" ((USItype)(y3)), \ | |
147 | "%rJ" ((USItype)(x2)), \ | |
148 | "rI" ((USItype)(y2)), \ | |
149 | "%rJ" ((USItype)(x1)), \ | |
150 | "rI" ((USItype)(y1)), \ | |
151 | "%rJ" ((USItype)(x0)), \ | |
152 | "rI" ((USItype)(y0)) \ | |
153 | : "cc", "g1", "g2"); \ | |
154 | __asm__ __volatile__ ("" : "=r" (_t1), "=r" (_t2)); \ | |
155 | r3 = _t1; r2 = _t2; \ | |
156 | } while (0) | |
157 | ||
158 | #define __FP_FRAC_DEC_3(x2,x1,x0,y2,y1,y0) __FP_FRAC_SUB_3(x2,x1,x0,x2,x1,x0,y2,y1,y0) | |
159 | ||
160 | #define __FP_FRAC_DEC_4(x3,x2,x1,x0,y3,y2,y1,y0) __FP_FRAC_SUB_4(x3,x2,x1,x0,x3,x2,x1,x0,y3,y2,y1,y0) | |
161 | ||
162 | #define __FP_FRAC_ADDI_4(x3,x2,x1,x0,i) \ | |
163 | __asm__ ("addcc %3,%4,%3\n\t" \ | |
164 | "addxcc %2,%%g0,%2\n\t" \ | |
165 | "addxcc %1,%%g0,%1\n\t" \ | |
166 | "addx %0,%%g0,%0\n\t" \ | |
167 | : "=&r" ((USItype)(x3)), \ | |
168 | "=&r" ((USItype)(x2)), \ | |
169 | "=&r" ((USItype)(x1)), \ | |
170 | "=&r" ((USItype)(x0)) \ | |
171 | : "rI" ((USItype)(i)), \ | |
172 | "0" ((USItype)(x3)), \ | |
173 | "1" ((USItype)(x2)), \ | |
174 | "2" ((USItype)(x1)), \ | |
175 | "3" ((USItype)(x0)) \ | |
176 | : "cc") | |
177 | ||
178 | #ifndef CONFIG_SMP | |
179 | extern struct task_struct *last_task_used_math; | |
180 | #endif | |
181 | ||
182 | /* Obtain the current rounding mode. */ | |
183 | #ifndef FP_ROUNDMODE | |
184 | #ifdef CONFIG_SMP | |
185 | #define FP_ROUNDMODE ((current->thread.fsr >> 30) & 0x3) | |
186 | #else | |
187 | #define FP_ROUNDMODE ((last_task_used_math->thread.fsr >> 30) & 0x3) | |
188 | #endif | |
189 | #endif | |
190 | ||
191 | /* Exception flags. */ | |
192 | #define FP_EX_INVALID (1 << 4) | |
193 | #define FP_EX_OVERFLOW (1 << 3) | |
194 | #define FP_EX_UNDERFLOW (1 << 2) | |
195 | #define FP_EX_DIVZERO (1 << 1) | |
196 | #define FP_EX_INEXACT (1 << 0) | |
197 | ||
198 | #define FP_HANDLE_EXCEPTIONS return _fex | |
199 | ||
200 | #ifdef CONFIG_SMP | |
201 | #define FP_INHIBIT_RESULTS ((current->thread.fsr >> 23) & _fex) | |
202 | #else | |
203 | #define FP_INHIBIT_RESULTS ((last_task_used_math->thread.fsr >> 23) & _fex) | |
204 | #endif | |
205 | ||
40584961 DM |
206 | #ifdef CONFIG_SMP |
207 | #define FP_TRAPPING_EXCEPTIONS ((current->thread.fsr >> 23) & 0x1f) | |
208 | #else | |
209 | #define FP_TRAPPING_EXCEPTIONS ((last_task_used_math->thread.fsr >> 23) & 0x1f) | |
210 | #endif | |
211 | ||
1da177e4 | 212 | #endif |