From 7b674621bf302fc4791fc11ed109d1575474daed Mon Sep 17 00:00:00 2001 From: kleink Date: Tue, 28 Oct 2003 21:27:08 +0000 Subject: [PATCH] Retire FPA support from this file at last; suggested by Richard Earnshaw and not objected to by port-arm. --- sys/arch/arm/include/ieee.h | 156 +----------------------------------- 1 file changed, 2 insertions(+), 154 deletions(-) diff --git a/sys/arch/arm/include/ieee.h b/sys/arch/arm/include/ieee.h index fb9803d7174f..8bf295dfa018 100644 --- a/sys/arch/arm/include/ieee.h +++ b/sys/arch/arm/include/ieee.h @@ -1,155 +1,3 @@ -/* $NetBSD: ieee.h,v 1.6 2003/10/27 10:13:48 kleink Exp $ */ +/* $NetBSD: ieee.h,v 1.7 2003/10/28 21:27:08 kleink Exp $ */ -/* - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * This software was developed by the Computer Systems Engineering group - * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and - * contributed to Berkeley. - * - * All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Lawrence Berkeley Laboratory. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)ieee.h 8.1 (Berkeley) 6/11/93 - */ - -/* - * ieee.h defines the machine-dependent layout of the machine's IEEE - * floating point. - */ - -/* - * Define the number of bits in each fraction and exponent. - * - * k k+1 - * Note that 1.0 x 2 == 0.1 x 2 and that denorms are represented - * - * (-exp_bias+1) - * as fractions that look like 0.fffff x 2 . This means that - * - * -126 - * the number 0.10000 x 2 , for instance, is the same as the normalized - * - * -127 -128 - * float 1.0 x 2 . Thus, to represent 2 , we need one leading zero - * - * -129 - * in the fraction; to represent 2 , we need two, and so on. This - * - * (-exp_bias-fracbits+1) - * implies that the smallest denormalized number is 2 - * - * for whichever format we are talking about: for single precision, for - * - * -126 -149 - * instance, we get .00000000000000000000001 x 2 , or 1.0 x 2 , and - * - * -149 == -127 - 23 + 1. - */ - -/* - * The ARM has two sets of FP data formats. The FPA supports 32-bit, 64-bit - * and 96-bit IEEE formats, with the words in big-endian order. VFP supports - * 32-bin and 64-bit IEEE formats with the words in the CPU's native byte - * order. - * - * The FPA also has two packed decimal formats, but we ignore them here. - */ - -#define SNG_EXPBITS 8 -#define SNG_FRACBITS 23 - -#define DBL_EXPBITS 11 -#define DBL_FRACBITS 52 - -struct ieee_single { - u_int sng_frac:23; - u_int sng_exponent:8; - u_int sng_sign:1; -}; - -#ifdef __VFP_FP__ -struct ieee_double { -#ifdef __ARMEB__ - u_int dbl_sign:1; - u_int dbl_exp:11; - u_int dbl_frach:20; - u_int dbl_fracl; -#else /* !__ARMEB__ */ - u_int dbl_fracl; - u_int dbl_frach:20; - u_int dbl_exp:11; - u_int dbl_sign:1; -#endif /* !__ARMEB__ */ -}; -#else /* !__VFP_FP__ */ -struct ieee_double { - u_int dbl_frach:20; - u_int dbl_exp:11; - u_int dbl_sign:1; - u_int dbl_fracl; -}; -#endif /* !__VFP_FP__ */ - -/* - * Floats whose exponent is in [1..INFNAN) (of whatever type) are - * `normal'. Floats whose exponent is INFNAN are either Inf or NaN. - * Floats whose exponent is zero are either zero (iff all fraction - * bits are zero) or subnormal values. - * - * A NaN is a `signalling NaN' if its QUIETNAN bit is clear in its - * high fraction; if the bit is set, it is a `quiet NaN'. - */ -#define SNG_EXP_INFNAN 255 -#define DBL_EXP_INFNAN 2047 - -#if 0 -#define SNG_QUIETNAN (1 << 22) -#define DBL_QUIETNAN (1 << 19) -#endif - -/* - * Exponent biases. - */ -#define SNG_EXP_BIAS 127 -#define DBL_EXP_BIAS 1023 - -/* - * Convenience data structures. - */ -union ieee_single_u { - float sngu_f; - struct ieee_single sngu_sng; -}; - -union ieee_double_u { - double dblu_d; - struct ieee_double dblu_dbl; -}; +#include