1 /*- 2 * Copyright (c) 1990 Andrew Moore, Talke Studio 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#) ieeefp.h 1.0 (Berkeley) 9/23/93 34 * $Id$ 35 */ 36 37 /* 38 * IEEE floating point type and constant definitions. 39 */ 40 41 #ifndef _MACHINE_IEEEFP_H_ 42 #define _MACHINE_IEEEFP_H_ 43 44 /* 45 * FP rounding modes 46 */ 47 typedef enum { 48 FP_RN=0, /* round to nearest */ 49 FP_RM, /* round down to minus infinity */ 50 FP_RP, /* round up to plus infinity */ 51 FP_RZ /* truncate */ 52 } fp_rnd_t; 53 54 /* 55 * FP precision modes 56 */ 57 typedef enum { 58 FP_PS=0, /* 24 bit (single-precision) */ 59 FP_PRS, /* reserved */ 60 FP_PD, /* 53 bit (double-precision) */ 61 FP_PE /* 64 bit (extended-precision) */ 62 } fp_prec_t; 63 64 #define fp_except_t int 65 66 /* 67 * FP exception masks 68 */ 69 #define FP_X_INV 0x01 /* invalid operation */ 70 #define FP_X_DNML 0x02 /* denormal */ 71 #define FP_X_DZ 0x04 /* zero divide */ 72 #define FP_X_OFL 0x08 /* overflow */ 73 #define FP_X_UFL 0x10 /* underflow */ 74 #define FP_X_IMP 0x20 /* (im)precision */ 75 76 /* 77 * FP registers 78 */ 79 #define FP_MSKS_REG 0 /* exception masks */ 80 #define FP_PRC_REG 0 /* precision */ 81 #define FP_RND_REG 0 /* direction */ 82 #define FP_STKY_REG 1 /* sticky flags */ 83 84 /* 85 * FP register bit field masks 86 */ 87 #define FP_MSKS_FLD 0x3f /* exception masks field */ 88 #define FP_PRC_FLD 0x300 /* precision control field */ 89 #define FP_RND_FLD 0xc00 /* round control field */ 90 #define FP_STKY_FLD 0x3f /* sticky flags field */ 91 92 /* 93 * FP register bit field offsets 94 */ 95 #define FP_MSKS_OFF 0 /* exception masks offset */ 96 #define FP_PRC_OFF 8 /* precision control offset */ 97 #define FP_RND_OFF 10 /* round control offset */ 98 #define FP_STKY_OFF 0 /* sticky flags offset */ 99 100 #endif /* !_MACHINE_IEEEFP_H_ */ 101