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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 | /* Machine-dependent software floating-point definitions. S/390 kernel 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. */ #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ do { \ if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs) \ && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)) \ { \ R##_s = Y##_s; \ _FP_FRAC_COPY_##wc(R,Y); \ } \ else \ { \ R##_s = X##_s; \ _FP_FRAC_COPY_##wc(R,X); \ } \ 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) ({ \ unsigned int __r2 = (x2) + (y2); \ unsigned int __r1 = (x1); \ unsigned int __r0 = (x0); \ __asm__ (" alr %2,%3\n" \ " brc 12,0f\n" \ " lhi 0,1\n" \ " alr %1,0\n" \ " brc 12,0f\n" \ " alr %0,0\n" \ "0:" \ : "+&d" (__r2), "+&d" (__r1), "+&d" (__r0) \ : "d" (y0), "i" (1) : "cc", "0" ); \ __asm__ (" alr %1,%2\n" \ " brc 12,0f\n" \ " ahi %0,1\n" \ "0:" \ : "+&d" (__r2), "+&d" (__r1) \ : "d" (y1) : "cc" ); \ (r2) = __r2; \ (r1) = __r1; \ (r0) = __r0; \ }) #define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) ({ \ unsigned int __r2 = (x2) - (y2); \ unsigned int __r1 = (x1); \ unsigned int __r0 = (x0); \ __asm__ (" slr %2,%3\n" \ " brc 3,0f\n" \ " lhi 0,1\n" \ " slr %1,0\n" \ " brc 3,0f\n" \ " slr %0,0\n" \ "0:" \ : "+&d" (__r2), "+&d" (__r1), "+&d" (__r0) \ : "d" (y0) : "cc", "0" ); \ __asm__ (" slr %1,%2\n" \ " brc 3,0f\n" \ " ahi %0,-1\n" \ "0:" \ : "+&d" (__r2), "+&d" (__r1) \ : "d" (y1) : "cc" ); \ (r2) = __r2; \ (r1) = __r1; \ (r0) = __r0; \ }) #define __FP_FRAC_DEC_3(x2,x1,x0,y2,y1,y0) __FP_FRAC_SUB_3(x2,x1,x0,x2,x1,x0,y2,y1,y0) /* Obtain the current rounding mode. */ #define FP_ROUNDMODE mode /* Exception flags. */ #define FP_EX_INVALID 0x800000 #define FP_EX_DIVZERO 0x400000 #define FP_EX_OVERFLOW 0x200000 #define FP_EX_UNDERFLOW 0x100000 #define FP_EX_INEXACT 0x080000 /* We write the results always */ #define FP_INHIBIT_RESULTS 0 #endif |