fsr.h revision 1.3
1/* $NetBSD: fsr.h,v 1.3 2005/12/11 12:19:10 christos Exp $ */ 2 3/* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)fsr.h 8.1 (Berkeley) 6/11/93 41 */ 42 43#ifndef _MACHINE_FSR_H_ 44#define _MACHINE_FSR_H_ 45 46/* 47 * Bits in FPRS 48 */ 49#define FPRS_FEF 0x04 /* Enable FP -- must be set to enable FP regs */ 50#define FPRS_DU 0x02 /* Dirty upper -- upper fp regs are dirty */ 51#define FPRS_DL 0x01 /* Dirty lower -- lower fp regs are dirty */ 52 53/* 54 * Bits in FSR. 55 */ 56 57#define FSR_RD 0xc0000000 /* rounding direction */ 58#define FSR_RD_RN 0 /* round to nearest */ 59#define FSR_RD_RZ 1 /* round towards 0 */ 60#define FSR_RD_RP 2 /* round towards +inf */ 61#define FSR_RD_RM 3 /* round towards -inf */ 62#define FSR_RD_SHIFT 30 63#define FSR_RD_MASK 0x03 64 65#define FSR_RP 0x30000000 /* extended rounding precision */ 66#define FSR_RP_X 0 /* extended stays extended */ 67#define FSR_RP_S 1 /* extended => single */ 68#define FSR_RP_D 2 /* extended => double */ 69#define FSR_RP_80 3 /* extended => 80-bit */ 70#define FSR_RP_SHIFT 28 71#define FSR_RP_MASK 0x03 72 73#define FSR_TEM 0x0f800000 /* trap enable mask */ 74#define FSR_TEM_SHIFT 23 75#define FSR_TEM_MASK 0x1f 76 77#define FSR_NS 0x00400000 /* ``nonstandard mode'' */ 78#define FSR_AU 0x00400000 /* aka abrupt underflow mode */ 79#define FSR_MBZ 0x00300000 /* reserved; must be zero */ 80 81#define FSR_VER 0x000e0000 /* version bits */ 82#define FSR_VER_SHIFT 17 83#define FSR_VER_MASK 0x07 84 85#define FSR_FTT 0x0001c000 /* FP trap type */ 86#define FSR_TT_NONE 0 /* no trap */ 87#define FSR_TT_IEEE 1 /* IEEE exception */ 88#define FSR_TT_UNFIN 2 /* unfinished operation */ 89#define FSR_TT_UNIMP 3 /* unimplemented operation */ 90#define FSR_TT_SEQ 4 /* sequence error */ 91#define FSR_TT_HWERR 5 /* hardware error (unrecoverable) */ 92#define FSR_FTT_SHIFT 14 93#define FSR_FTT_MASK 0x03 94 95#define FSR_QNE 0x00002000 /* queue not empty */ 96#define FSR_PR 0x00001000 /* partial result */ 97 98#define FSR_FCC 0x00000c00 /* FP condition codes */ 99#define FSR_CC_EQ 0 /* f1 = f2 */ 100#define FSR_CC_LT 1 /* f1 < f2 */ 101#define FSR_CC_GT 2 /* f1 > f2 */ 102#define FSR_CC_UO 3 /* (f1,f2) unordered */ 103#define FSR_FCC_SHIFT 10 104#define FSR_FCC_MASK 0x03 105 106#define FSR_AX 0x000003e0 /* accrued exceptions */ 107#define FSR_AX_SHIFT 5 108#define FSR_AX_MASK 0x1f 109#define FSR_CX 0x0000001f /* current exceptions */ 110#define FSR_CX_SHIFT 0 111#define FSR_CX_MASK 0x1f 112 113/* These are the 3 new v9 fcc's */ 114#define FSR_FCC3 0x06000000000 /* FP condition codes */ 115#define FSR_FCC3_SHIFT 36 116 117#define FSR_FCC2 0x0c00000000 /* FP condition codes */ 118#define FSR_FCC2_SHIFT 34 119 120#define FSR_FCC1 0x0600000000 /* FP condition codes */ 121#define FSR_FCC1_SHIFT 32 122 123 124/* The following exceptions apply to TEM, AX, and CX. */ 125#define FSR_NV 0x10 /* invalid operand */ 126#define FSR_OF 0x08 /* overflow */ 127#define FSR_UF 0x04 /* underflow */ 128#define FSR_DZ 0x02 /* division by zero */ 129#define FSR_NX 0x01 /* inexact result */ 130 131#endif /* _MACHINE_FSR_H_ */ 132