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