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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 | ||
28 | #include <linux/config.h> | |
29 | ||
30 | #define _FP_W_TYPE_SIZE 32 | |
31 | #define _FP_W_TYPE unsigned long | |
32 | #define _FP_WS_TYPE signed long | |
33 | #define _FP_I_TYPE long | |
34 | ||
35 | #define _FP_MUL_MEAT_S(R,X,Y) \ | |
36 | _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm) | |
37 | #define _FP_MUL_MEAT_D(R,X,Y) \ | |
38 | _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) | |
39 | #define _FP_MUL_MEAT_Q(R,X,Y) \ | |
40 | _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) | |
41 | ||
42 | #define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_udiv(S,R,X,Y) | |
43 | #define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_2_udiv(D,R,X,Y) | |
44 | #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_4_udiv(Q,R,X,Y) | |
45 | ||
46 | #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) | |
47 | #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1), -1 | |
48 | #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1 | |
49 | #define _FP_NANSIGN_S 0 | |
50 | #define _FP_NANSIGN_D 0 | |
51 | #define _FP_NANSIGN_Q 0 | |
52 | ||
53 | #define _FP_KEEPNANFRACP 1 | |
54 | ||
55 | /* If one NaN is signaling and the other is not, | |
56 | * we choose that one, otherwise we choose X. | |
57 | */ | |
58 | /* For _Qp_* and _Q_*, this should prefer X, for | |
59 | * CPU instruction emulation this should prefer Y. | |
60 | * (see SPAMv9 B.2.2 section). | |
61 | */ | |
62 | #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ | |
63 | do { \ | |
64 | if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \ | |
65 | && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \ | |
66 | { \ | |
67 | R##_s = X##_s; \ | |
68 | _FP_FRAC_COPY_##wc(R,X); \ | |
69 | } \ | |
70 | else \ | |
71 | { \ | |
72 | R##_s = Y##_s; \ | |
73 | _FP_FRAC_COPY_##wc(R,Y); \ | |
74 | } \ | |
75 | R##_c = FP_CLS_NAN; \ | |
76 | } while (0) | |
77 | ||
78 | /* Some assembly to speed things up. */ | |
79 | #define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) \ | |
80 | __asm__ ("addcc %r7,%8,%2\n\t" \ | |
81 | "addxcc %r5,%6,%1\n\t" \ | |
82 | "addx %r3,%4,%0\n" \ | |
83 | : "=r" ((USItype)(r2)), \ | |
84 | "=&r" ((USItype)(r1)), \ | |
85 | "=&r" ((USItype)(r0)) \ | |
86 | : "%rJ" ((USItype)(x2)), \ | |
87 | "rI" ((USItype)(y2)), \ | |
88 | "%rJ" ((USItype)(x1)), \ | |
89 | "rI" ((USItype)(y1)), \ | |
90 | "%rJ" ((USItype)(x0)), \ | |
91 | "rI" ((USItype)(y0)) \ | |
92 | : "cc") | |
93 | ||
94 | #define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) \ | |
95 | __asm__ ("subcc %r7,%8,%2\n\t" \ | |
96 | "subxcc %r5,%6,%1\n\t" \ | |
97 | "subx %r3,%4,%0\n" \ | |
98 | : "=r" ((USItype)(r2)), \ | |
99 | "=&r" ((USItype)(r1)), \ | |
100 | "=&r" ((USItype)(r0)) \ | |
101 | : "%rJ" ((USItype)(x2)), \ | |
102 | "rI" ((USItype)(y2)), \ | |
103 | "%rJ" ((USItype)(x1)), \ | |
104 | "rI" ((USItype)(y1)), \ | |
105 | "%rJ" ((USItype)(x0)), \ | |
106 | "rI" ((USItype)(y0)) \ | |
107 | : "cc") | |
108 | ||
109 | #define __FP_FRAC_ADD_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0) \ | |
110 | do { \ | |
111 | /* We need to fool gcc, as we need to pass more than 10 \ | |
112 | input/outputs. */ \ | |
113 | register USItype _t1 __asm__ ("g1"), _t2 __asm__ ("g2"); \ | |
114 | __asm__ __volatile__ ( \ | |
115 | "addcc %r8,%9,%1\n\t" \ | |
116 | "addxcc %r6,%7,%0\n\t" \ | |
117 | "addxcc %r4,%5,%%g2\n\t" \ | |
118 | "addx %r2,%3,%%g1\n\t" \ | |
119 | : "=&r" ((USItype)(r1)), \ | |
120 | "=&r" ((USItype)(r0)) \ | |
121 | : "%rJ" ((USItype)(x3)), \ | |
122 | "rI" ((USItype)(y3)), \ | |
123 | "%rJ" ((USItype)(x2)), \ | |
124 | "rI" ((USItype)(y2)), \ | |
125 | "%rJ" ((USItype)(x1)), \ | |
126 | "rI" ((USItype)(y1)), \ | |
127 | "%rJ" ((USItype)(x0)), \ | |
128 | "rI" ((USItype)(y0)) \ | |
129 | : "cc", "g1", "g2"); \ | |
130 | __asm__ __volatile__ ("" : "=r" (_t1), "=r" (_t2)); \ | |
131 | r3 = _t1; r2 = _t2; \ | |
132 | } while (0) | |
133 | ||
134 | #define __FP_FRAC_SUB_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0) \ | |
135 | do { \ | |
136 | /* We need to fool gcc, as we need to pass more than 10 \ | |
137 | input/outputs. */ \ | |
138 | register USItype _t1 __asm__ ("g1"), _t2 __asm__ ("g2"); \ | |
139 | __asm__ __volatile__ ( \ | |
140 | "subcc %r8,%9,%1\n\t" \ | |
141 | "subxcc %r6,%7,%0\n\t" \ | |
142 | "subxcc %r4,%5,%%g2\n\t" \ | |
143 | "subx %r2,%3,%%g1\n\t" \ | |
144 | : "=&r" ((USItype)(r1)), \ | |
145 | "=&r" ((USItype)(r0)) \ | |
146 | : "%rJ" ((USItype)(x3)), \ | |
147 | "rI" ((USItype)(y3)), \ | |
148 | "%rJ" ((USItype)(x2)), \ | |
149 | "rI" ((USItype)(y2)), \ | |
150 | "%rJ" ((USItype)(x1)), \ | |
151 | "rI" ((USItype)(y1)), \ | |
152 | "%rJ" ((USItype)(x0)), \ | |
153 | "rI" ((USItype)(y0)) \ | |
154 | : "cc", "g1", "g2"); \ | |
155 | __asm__ __volatile__ ("" : "=r" (_t1), "=r" (_t2)); \ | |
156 | r3 = _t1; r2 = _t2; \ | |
157 | } while (0) | |
158 | ||
159 | #define __FP_FRAC_DEC_3(x2,x1,x0,y2,y1,y0) __FP_FRAC_SUB_3(x2,x1,x0,x2,x1,x0,y2,y1,y0) | |
160 | ||
161 | #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) | |
162 | ||
163 | #define __FP_FRAC_ADDI_4(x3,x2,x1,x0,i) \ | |
164 | __asm__ ("addcc %3,%4,%3\n\t" \ | |
165 | "addxcc %2,%%g0,%2\n\t" \ | |
166 | "addxcc %1,%%g0,%1\n\t" \ | |
167 | "addx %0,%%g0,%0\n\t" \ | |
168 | : "=&r" ((USItype)(x3)), \ | |
169 | "=&r" ((USItype)(x2)), \ | |
170 | "=&r" ((USItype)(x1)), \ | |
171 | "=&r" ((USItype)(x0)) \ | |
172 | : "rI" ((USItype)(i)), \ | |
173 | "0" ((USItype)(x3)), \ | |
174 | "1" ((USItype)(x2)), \ | |
175 | "2" ((USItype)(x1)), \ | |
176 | "3" ((USItype)(x0)) \ | |
177 | : "cc") | |
178 | ||
179 | #ifndef CONFIG_SMP | |
180 | extern struct task_struct *last_task_used_math; | |
181 | #endif | |
182 | ||
183 | /* Obtain the current rounding mode. */ | |
184 | #ifndef FP_ROUNDMODE | |
185 | #ifdef CONFIG_SMP | |
186 | #define FP_ROUNDMODE ((current->thread.fsr >> 30) & 0x3) | |
187 | #else | |
188 | #define FP_ROUNDMODE ((last_task_used_math->thread.fsr >> 30) & 0x3) | |
189 | #endif | |
190 | #endif | |
191 | ||
192 | /* Exception flags. */ | |
193 | #define FP_EX_INVALID (1 << 4) | |
194 | #define FP_EX_OVERFLOW (1 << 3) | |
195 | #define FP_EX_UNDERFLOW (1 << 2) | |
196 | #define FP_EX_DIVZERO (1 << 1) | |
197 | #define FP_EX_INEXACT (1 << 0) | |
198 | ||
199 | #define FP_HANDLE_EXCEPTIONS return _fex | |
200 | ||
201 | #ifdef CONFIG_SMP | |
202 | #define FP_INHIBIT_RESULTS ((current->thread.fsr >> 23) & _fex) | |
203 | #else | |
204 | #define FP_INHIBIT_RESULTS ((last_task_used_math->thread.fsr >> 23) & _fex) | |
205 | #endif | |
206 | ||
207 | #endif |