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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
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" (r2), \
83 "=&r" (r1), \
84 "=&r" (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" (r2), \
98 "=&r" (r1), \
99 "=&r" (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" (r1), \
119 "=&r" (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" (r1), \
144 "=&r" (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" (x3), \
168 "=&r" (x2), \
169 "=&r" (x1), \
170 "=&r" (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
179extern 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
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
212#endif