fc3df11e08
actually care if opal_pointer_array is limited to handle_max already passes that in as the max_size during init, so don't need it there. The arch constant was a bit more difficult, so pass that in during MPI init and leave empty otherwise. This is to help with the effort to allow building ompi against an external opal or orte. This commit was SVN r27817.
249 строки
8.5 KiB
C
249 строки
8.5 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; -*- */
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/*
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* Copyright (c) 2004-2006 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2006 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2006 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2006 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2008 Cisco Systems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#ifndef OPAL_ARCH_H_HAS_BEEN_INCLUDED
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#define OPAL_ARCH_H_HAS_BEEN_INCLUDED
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#include "opal_config.h"
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#include <float.h>
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#include <assert.h>
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/***************************************************
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** This file tries to classify the most relevant
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** platforms regarding their data representation.
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** Three aspects are important:
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** - byte ordering (little or big endian)
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** - integer representation
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** - floating point representation.
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** In addition, don't forget about the C/Fortran problems.
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**
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*****************************************************/
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/*****************************************************************
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** Part 1: Integer representation.
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**
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** The following data types are considered relevant:
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**
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** short
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** int
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** long
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** long long
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** integer (fortran)
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**
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** The fortran integer is dismissed here, since there is no
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** platform known to me, were fortran and C-integer do not match
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**
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** The following abbriviations are introduced:
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**
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** a) il32 (int long are 32 bits) (e.g. IA32 LINUX, SGI n32, SUN)
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**
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** short: 16 (else it would appear in the name)
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** int: 32
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** long: 32
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** long long: 64
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**
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** b) il64 ( int long are 64 bits) (e.g. Cray T3E )
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** short: 32
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** int: 64
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** long: 64
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** long long: 64
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**
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** c) l64 (long are 64 bits) (e.g. SGI 64 IRIX, NEC SX5)
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**
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** short: 16
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** int: 32
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** long: 64
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** long long: 64
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**
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***********************************************************************/
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/*********************************************************************
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** Part 2: Floating point representation
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**
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** The following datatypes are considered relevant
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**
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** float
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** double
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** long double
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** real
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** double precision
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**
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** Unfortunatly, here we have to take care, whether float and real,
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** respectively double and double precision do match...
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**
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** a) fr32 (float and real are 32 bits) (e.g. SGI n32 and 64, SUN, NEC SX5,...)
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** float: 32
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** double: 64
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** long double: 128
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** real: 32
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** double prec.:64
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**
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** a1) fr32ld96 (float and real 32, long double 96) (e.g. IA32 LINUX gcc/icc)
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** see a), except long double is 96
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**
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** a2) fr32ld64 (e.g. IBM )
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** see a), except long double is 64
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**
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** b) cray ( e.g. Cray T3E)
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** float: 32
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** double: 64
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** long double: 64
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** real: 64
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** double prec.:64
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**
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**
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** Problem: long double is really treated differently on every machine. Therefore,
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** we are storing besides the length of the long double also the length of the mantisee,
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** and the number of *relevant* bits in the exponent. Here are the values:
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**
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** Architecture sizeof(long double) mantisee relevant bits for exp.
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**
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** SGIn32/64: 128 107 10
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** SUN(sparc): 128 113 14
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** IA64: 128 64 14
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** IA32: 96 64 14
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** Alpha: 128 113 14
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** 64 53 10 (gcc)
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** IBM: 64 53 10
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** (128 106 10) (special flags required).
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** SX5: 128 105 22
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**
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** We will not implement all of these routiens, but we consider them
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** now when defining the header-settings
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**
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***********************************************************************/
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/********************************************************************
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**
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** Classification of machines:
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**
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** IA32 LINUX: il32, fr32ld96, little endian
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** SUN: il32, fr32, big endian
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** SGI n32: il32, fr32, big endian
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** SGI 64: l64, fr32, big endian
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** NEC SX5: l64, fr32 big endian
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** Cray T3E: il64, cray, big endian
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** Cray X1: i32(+), fr32, big endian
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** IBM: il32, fr32ld64, big endian
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** ALPHA: l64, fr32, little endian
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** ITANIUM: l64, fr32, little endian
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**
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**
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** + sizeof ( long long ) not known
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** ? alpha supports both, big and little endian
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***********************************************************************/
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/* Current conclusions:
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** we need at the moment three settings:
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** - big/little endian ?
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** - is long 32 or 64 bits ?
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** - is long double 64, 96 or 128 bits ?
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** - no. of rel. bits in the exponent of a long double ( 10 or 14 )
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** - no. of bits of the mantiss of a long double ( 53, 64, 105, 106, 107, 113 )
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**
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** To store this in a 32 bit integer, we use the following definition:
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**
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** 1 2 3 4
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** 12345678 12345678 12345678 12345678
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**
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** 1. Byte:
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** bits 1 & 2: 00 (header) (to recognize the correct end)
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** bits 3 & 4: encoding: 00 = little, 01 = big
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** bits 5 & 6: reserved for later use. currently set to 00
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** bits 7 & 8: reserved for later use. currently set to 00
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** 2. Byte:
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** bits 1 & 2: length of long: 00 = 32, 01 = 64
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** bits 3 & 4: lenght of long long (not used currently, set to 00).
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** bits 5 & 6: length of C/C++ bool (00 = 8, 01 = 16, 10 = 32)
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** bits 7 & 8: length of Fortran Logical (00 = 8, 01 = 16, 10 = 32)
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** 3. Byte:
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** bits 1 & 2: length of long double: 00=64, 01=96,10 = 128
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** bits 3 & 4: no. of rel. bits in the exponent: 00 = 10, 01 = 14)
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** bits 5 - 7: no. of bits of mantisse ( 000 = 53, 001 = 64, 010 = 105,
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** 011 = 106, 100 = 107,101 = 113 )
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** bit 8: intel or sparc representation of mantisse (0 = sparc,
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** 1 = intel )
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** 4. Byte:
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** bits 1 & 2: 11 (header) (to recognize the correct end)
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** bits 3 & 4: reserved for later use. currently set to 11
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** bits 5 & 6: reserved for later use. currently set to 11
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** bits 7 & 8: reserved for later use. currently set to 11
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*/
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/* These masks implement the specification above above */
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#define OPAL_ARCH_HEADERMASK 0x03000000 /* set the fields for the header */
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#define OPAL_ARCH_HEADERMASK2 0x00000003 /* other end, needed for checks */
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#define OPAL_ARCH_UNUSEDMASK 0xfc000000 /* mark the unused fields */
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/* BYTE 1 */
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#define OPAL_ARCH_ISBIGENDIAN 0x00000008
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/* BYTE 2 */
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#define OPAL_ARCH_LONGISxx 0x0000c000 /* mask for sizeof long */
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#define OPAL_ARCH_LONGIS64 0x00001000
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#define OPAL_ARCH_LONGLONGISxx 0x00003000 /* mask for sizeof long long */
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#define OPAL_ARCH_BOOLISxx 0x00000c00 /* mask for sizeof bool */
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#define OPAL_ARCH_BOOLIS8 0x00000000 /* bool is 8 bits */
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#define OPAL_ARCH_BOOLIS16 0x00000400 /* bool is 16 bits */
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#define OPAL_ARCH_BOOLIS32 0x00000800 /* bool is 32 bits */
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#define OPAL_ARCH_LOGICALISxx 0x00000300 /* mask for sizeof Fortran logical */
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#define OPAL_ARCH_LOGICALIS8 0x00000000 /* logical is 8 bits */
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#define OPAL_ARCH_LOGICALIS16 0x00000100 /* logical is 16 bits */
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#define OPAL_ARCH_LOGICALIS32 0x00000200 /* logical is 32 bits */
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/* BYTE 3 */
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#define OPAL_ARCH_LONGDOUBLEIS96 0x00020000
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#define OPAL_ARCH_LONGDOUBLEIS128 0x00010000
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#define OPAL_ARCH_LDEXPSIZEIS15 0x00080000
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#define OPAL_ARCH_LDMANTDIGIS64 0x00400000
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#define OPAL_ARCH_LDMANTDIGIS105 0x00200000
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#define OPAL_ARCH_LDMANTDIGIS106 0x00600000
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#define OPAL_ARCH_LDMANTDIGIS107 0x00100000
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#define OPAL_ARCH_LDMANTDIGIS113 0x00500000
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#define OPAL_ARCH_LDISINTEL 0x00800000
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BEGIN_C_DECLS
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/* Local Architecture */
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OPAL_DECLSPEC extern uint32_t opal_local_arch;
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/* Initialize architecture and determine all but fortran logical fields */
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OPAL_DECLSPEC int opal_arch_init(void);
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OPAL_DECLSPEC int32_t opal_arch_checkmask ( uint32_t *var, uint32_t mask );
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/* Set fortran logical fields after init, to keep fortran out of opal... */
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OPAL_DECLSPEC int opal_arch_set_fortran_logical_size(uint32_t size);
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END_C_DECLS
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#endif /* OPAL_ARCH_H_HAS_BEEN_INCLUDED */
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