1 /* $OpenBSD: fsr.h,v 1.3 2003/06/02 23:27:54 millert Exp $ */ 2 /* $NetBSD: fsr.h,v 1.2 1994/11/20 20:53:08 deraadt Exp $ */ 3 4 /* 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This software was developed by the Computer Systems Engineering group 9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 10 * contributed to Berkeley. 11 * 12 * All advertising materials mentioning features or use of this software 13 * must display the following acknowledgement: 14 * This product includes software developed by the University of 15 * California, Lawrence Berkeley Laboratory. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 3. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)fsr.h 8.1 (Berkeley) 6/11/93 42 */ 43 44 #ifndef _MACHINE_FSR_H_ 45 #define _MACHINE_FSR_H_ 46 47 /* 48 * Bits in FSR. 49 */ 50 #define FSR_RD 0xc0000000 /* rounding direction */ 51 #define FSR_RD_RN 0 /* round to nearest */ 52 #define FSR_RD_RZ 1 /* round towards 0 */ 53 #define FSR_RD_RP 2 /* round towards +inf */ 54 #define FSR_RD_RM 3 /* round towards -inf */ 55 #define FSR_RD_SHIFT 30 56 #define FSR_RD_MASK 0x03 57 58 #define FSR_RP 0x30000000 /* extended rounding precision */ 59 #define FSR_RP_X 0 /* extended stays extended */ 60 #define FSR_RP_S 1 /* extended => single */ 61 #define FSR_RP_D 2 /* extended => double */ 62 #define FSR_RP_80 3 /* extended => 80-bit */ 63 #define FSR_RP_SHIFT 28 64 #define FSR_RP_MASK 0x03 65 66 #define FSR_TEM 0x0f800000 /* trap enable mask */ 67 #define FSR_TEM_SHIFT 23 68 #define FSR_TEM_MASK 0x1f 69 70 #define FSR_NS 0x00400000 /* ``nonstandard mode'' */ 71 #define FSR_AU 0x00400000 /* aka abrupt underflow mode */ 72 #define FSR_MBZ 0x00300000 /* reserved; must be zero */ 73 74 #define FSR_VER 0x000e0000 /* version bits */ 75 #define FSR_VER_SHIFT 17 76 #define FSR_VER_MASK 0x07 77 78 #define FSR_FTT 0x0001c000 /* FP trap type */ 79 #define FSR_TT_NONE 0 /* no trap */ 80 #define FSR_TT_IEEE 1 /* IEEE exception */ 81 #define FSR_TT_UNFIN 2 /* unfinished operation */ 82 #define FSR_TT_UNIMP 3 /* unimplemented operation */ 83 #define FSR_TT_SEQ 4 /* sequence error */ 84 #define FSR_TT_HWERR 5 /* hardware error (unrecoverable) */ 85 #define FSR_FTT_SHIFT 14 86 #define FSR_FTT_MASK 0x03 87 88 #define FSR_QNE 0x00002000 /* queue not empty */ 89 #define FSR_PR 0x00001000 /* partial result */ 90 91 #define FSR_FCC 0x00000c00 /* FP condition codes */ 92 #define FSR_CC_EQ 0 /* f1 = f2 */ 93 #define FSR_CC_LT 1 /* f1 < f2 */ 94 #define FSR_CC_GT 2 /* f1 > f2 */ 95 #define FSR_CC_UO 3 /* (f1,f2) unordered */ 96 #define FSR_FCC_SHIFT 10 97 #define FSR_FCC_MASK 0x03 98 99 #define FSR_AX 0x000003e0 /* accrued exceptions */ 100 #define FSR_AX_SHIFT 5 101 #define FSR_AX_MASK 0x1f 102 #define FSR_CX 0x0000001f /* current exceptions */ 103 #define FSR_CX_SHIFT 0 104 #define FSR_CX_MASK 0x1f 105 106 /* The following exceptions apply to TEM, AX, and CX. */ 107 #define FSR_NV 0x10 /* invalid operand */ 108 #define FSR_OF 0x08 /* overflow */ 109 #define FSR_UF 0x04 /* underflow */ 110 #define FSR_DZ 0x02 /* division by zero */ 111 #define FSR_NX 0x01 /* inexact result */ 112 113 #endif /* _MACHINE_FSR_H_ */ 114