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Diffstat (limited to 'libc/arch-arm/include/machine/ieee.h')
| -rw-r--r-- | libc/arch-arm/include/machine/ieee.h | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/libc/arch-arm/include/machine/ieee.h b/libc/arch-arm/include/machine/ieee.h deleted file mode 100644 index 5f9b89e..0000000 --- a/libc/arch-arm/include/machine/ieee.h +++ /dev/null @@ -1,191 +0,0 @@ -/* $OpenBSD: ieee.h,v 1.1 2004/02/01 05:09:49 drahn Exp $ */ -/* $NetBSD: ieee.h,v 1.2 2001/02/21 17:43:50 bjh21 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. 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, Berkeley and its contributors. - * 4. 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 - -#ifndef __VFP_FP__ -#define E80_EXPBITS 15 -#define E80_FRACBITS 64 - -#define EXT_EXPBITS 15 -#define EXT_FRACBITS 112 -#endif - -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; -}; - -union ieee_double_u { - double dblu_d; - struct ieee_double dblu_dbl; -}; - - -struct ieee_e80 { - u_int e80_exp:15; - u_int e80_zero:16; - u_int e80_sign:1; - u_int e80_frach:31; - u_int e80_j:1; - u_int e80_fracl; -}; - -struct ieee_ext { - u_int ext_frach:16; - u_int ext_exp:15; - u_int ext_sign:1; - u_int ext_frachm; - u_int ext_fraclm; - u_int ext_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 -#ifndef __VFP_FP__ -#define E80_EXP_INFNAN 32767 -#define EXT_EXP_INFNAN 32767 -#endif /* !__VFP_FP__ */ - -#if 0 -#define SNG_QUIETNAN (1 << 22) -#define DBL_QUIETNAN (1 << 19) -#ifndef __VFP_FP__ -#define E80_QUIETNAN (1 << 15) -#define EXT_QUIETNAN (1 << 15) -#endif /* !__VFP_FP__ */ -#endif - -/* - * Exponent biases. - */ -#define SNG_EXP_BIAS 127 -#define DBL_EXP_BIAS 1023 -#ifndef __VFP_FP__ -#define E80_EXP_BIAS 16383 -#define EXT_EXP_BIAS 16383 -#endif /* !__VFP_FP__ */ |