/*
Copyright (c) 1993 Xerox Corporation.  All rights reserved.
*/
/*
$Id$

$Date$
 *
 * PCR architecture
 */

#ifndef __PCR_Arch_h
#define __PCR_Arch_h 1

/*
 * known architectures -- define *only* the one(s) that apply
 */

#undef PCR_Arch_SPARC
#undef PCR_Arch_SUN4
#if defined(PCR_Arch_SPARC) || defined(PCR_Arch_SUN4)
#   define PCR_Arch_name	"SPARC"
#endif

#undef PCR_Arch_IBMR6000
#if defined(PCR_Arch_IBMR6000)
#   define PCR_Arch_name	"IBMR6000"
#endif


#undef PCR_Arch_MIPS

#undef PCR_Arch_IRIS

#if defined(PCR_Arch_IRIS)
#   undef PCR_Arch_MIPS
#   define PCR_Arch_MIPS
#   define PCR_Arch_name	"SGI IRIS"
#elif defined(PCR_Arch_MIPS)
#   define PCR_Arch_name	"MIPS"
#endif

/*
 * Dimensions of variation ...
 *
 *   these should *all* be defined with appropriate values.
 */

/* test-and-set-like instruction exists */

#define PCR_Arch_TAS		0

/* endianness */

#define PCR_Arch_ENDIAN3210	0	/* big */
#define PCR_Arch_ENDIAN0123	0	/* little */
#define PCR_Arch_ENDIAN1032	0	/* weird */
#define PCR_Arch_ENDIAN2301	0	/* weird */

/* word size */

#undef PCR_Arch_STD_SIZES /* 8-bit byte, 16-bit short, 32-bit int/long/ptr */

/* alignment constraint: 0, 0x1, 0x3, 0x7, ... */

#undef PCR_Arch_ALIGN_MASK

/* stack direction: > 0 or < 0 */

#undef PCR_Arch_STK_PUSH_DIR

/*
 * Here we actually set this stuff for the chosen architecture
 */

#if (PCR_Arch_SPARC) || (PCR_Arch_SUN4)

#   undef PCR_Arch_ENDIAN3210
#   define PCR_Arch_ENDIAN3210		1

#   define PCR_Arch_STD_SIZES		1
#   define PCR_Arch_ALIGN_MASK		0x7
#   define PCR_Arch_STK_PUSH_DIR	(-1)

#elif (PCR_Arch_IBMR6000)

#   error IBMR6000 NYI

#elif (PCR_Arch_IRIS)

#else

#   error unknown arch

#endif

/* sanity checks */

#if ! PCR_Arch_STD_SIZES
#   error nonstandard sizes -- someday I will figure this out
#endif

#if ! defined(PCR_Arch_ALIGN_MASK)
#   error alignment constraint required
#endif

#if ! defined(PCR_Arch_STK_PUSH_DIR)
#   error no stack push direction defined
#endif

#endif /* ! __PCR_Arch_h */

/*
$Log$
*/