1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 23 */ 24 /* 25 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 #ifndef _LIBM_MACROS_H 30 #define _LIBM_MACROS_H 31 32 #include <sys/isa_defs.h> 33 34 #if defined(__sparc) 35 36 #define HIWORD 0 37 #define LOWORD 1 38 #define HIXWORD 0 /* index of int containing exponent */ 39 #define XSGNMSK 0x80000000 /* exponent bit mask within the int */ 40 #define XBIASED_EXP(x) ((((int *)&x)[HIXWORD] & ~0x80000000) >> 16) 41 #define ISZEROL(x) (((((int *)&x)[0] & ~XSGNMSK) | ((int *)&x)[1] | \ 42 ((int *)&x)[2] | ((int *)&x)[3]) == 0) 43 44 #elif defined(__x86) 45 46 #define HIWORD 1 47 #define LOWORD 0 48 #define HIXWORD 2 49 #define XSGNMSK 0x8000 50 #define XBIASED_EXP(x) (((int *)&x)[HIXWORD] & 0x7fff) 51 #define ISZEROL(x) (x == 0.0L) 52 53 #define HANDLE_UNSUPPORTED 54 55 /* 56 * "convert" the high-order 32 bits of a SPARC quad precision 57 * value ("I") to the sign, exponent, and high-order bits of an 58 * x86 extended double precision value ("E"); the low-order bits 59 * in the 12-byte quantity are left intact 60 */ 61 #define ITOX(I, E) \ 62 E[2] = 0xffff & ((I) >> 16); \ 63 E[1] = (((I) & 0x7fff0000) == 0)? \ 64 (E[1] & 0x7fff) | (0x7fff8000 & ((I) << 15)) :\ 65 0x80000000 | (E[1] & 0x7fff) | (0x7fff8000 & ((I) << 15)) 66 67 /* 68 * "convert" the sign, exponent, and high-order bits of an x86 69 * extended double precision value ("E") to the high-order 32 bits 70 * of a SPARC quad precision value ("I") 71 */ 72 #define XTOI(E, I) \ 73 I = ((E[2]<<16) | (0xffff & (E[1]>>15))) 74 75 #else 76 #error Unknown architecture 77 #endif 78 79 #endif /* _LIBM_MACROS_H */ 80