1/* Machine-dependent software floating-point definitions. 2 S/390 kernel 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/* 55 * If one NaN is signaling and the other is not, 56 * we choose that one, otherwise we choose X. 57 */ 58#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ 59 do { \ 60 if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs) \ 61 && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)) \ 62 { \ 63 R##_s = Y##_s; \ 64 _FP_FRAC_COPY_##wc(R,Y); \ 65 } \ 66 else \ 67 { \ 68 R##_s = X##_s; \ 69 _FP_FRAC_COPY_##wc(R,X); \ 70 } \ 71 R##_c = FP_CLS_NAN; \ 72 } while (0) 73 74/* Some assembly to speed things up. */ 75#define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) ({ \ 76 unsigned int __r2 = (x2) + (y2); \ 77 unsigned int __r1 = (x1); \ 78 unsigned int __r0 = (x0); \ 79 asm volatile( \ 80 " alr %2,%3\n" \ 81 " brc 12,0f\n" \ 82 " lhi 0,1\n" \ 83 " alr %1,0\n" \ 84 " brc 12,0f\n" \ 85 " alr %0,0\n" \ 86 "0:" \ 87 : "+&d" (__r2), "+&d" (__r1), "+&d" (__r0) \ 88 : "d" (y0), "i" (1) : "cc", "0" ); \ 89 asm volatile( \ 90 " alr %1,%2\n" \ 91 " brc 12,0f\n" \ 92 " ahi %0,1\n" \ 93 "0:" \ 94 : "+&d" (__r2), "+&d" (__r1) \ 95 : "d" (y1) : "cc"); \ 96 (r2) = __r2; \ 97 (r1) = __r1; \ 98 (r0) = __r0; \ 99}) 100 101#define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) ({ \ 102 unsigned int __r2 = (x2) - (y2); \ 103 unsigned int __r1 = (x1); \ 104 unsigned int __r0 = (x0); \ 105 asm volatile( \ 106 " slr %2,%3\n" \ 107 " brc 3,0f\n" \ 108 " lhi 0,1\n" \ 109 " slr %1,0\n" \ 110 " brc 3,0f\n" \ 111 " slr %0,0\n" \ 112 "0:" \ 113 : "+&d" (__r2), "+&d" (__r1), "+&d" (__r0) \ 114 : "d" (y0) : "cc", "0"); \ 115 asm volatile( \ 116 " slr %1,%2\n" \ 117 " brc 3,0f\n" \ 118 " ahi %0,-1\n" \ 119 "0:" \ 120 : "+&d" (__r2), "+&d" (__r1) \ 121 : "d" (y1) : "cc"); \ 122 (r2) = __r2; \ 123 (r1) = __r1; \ 124 (r0) = __r0; \ 125}) 126 127#define __FP_FRAC_DEC_3(x2,x1,x0,y2,y1,y0) __FP_FRAC_SUB_3(x2,x1,x0,x2,x1,x0,y2,y1,y0) 128 129/* Obtain the current rounding mode. */ 130#define FP_ROUNDMODE mode 131 132/* Exception flags. */ 133#define FP_EX_INVALID 0x800000 134#define FP_EX_DIVZERO 0x400000 135#define FP_EX_OVERFLOW 0x200000 136#define FP_EX_UNDERFLOW 0x100000 137#define FP_EX_INEXACT 0x080000 138 139/* We write the results always */ 140#define FP_INHIBIT_RESULTS 0 141 142#endif 143